chore(changelog): document load-time tuning and duplicate row key fix

.gitignore

@@ -1,2 +1,3 @@
-venv
+.venv
+auditui.egg-info
 __pycache__

.python-version

@@ -0,0 +1 @@
+3.12

CHANGELOG.md

@@ -0,0 +1,94 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.2.0] - 2026-02-18
+
+### Changed
+
+- massive code refactoring
+- complete test suite revamp
+- updated download cache naming to use `Author_Title` format with normalized separators
+- optimized library pagination fetch with bounded concurrent scheduling
+- adjusted library first-page probe order to prefer larger page sizes for medium libraries
+- removed eager search cache priming during library load to reduce startup work
+
+### Fixed
+
+- reused library metadata for download filename generation to avoid `Unknown-Author_Unknown-Title` when title/author are already known in the UI
+- fixed Audible last-position request parameter handling after library client refactor
+- added retry behavior and explicit size diagnostics when downloaded files are too small
+- prevented table rendering crashes by generating unique row keys instead of using title-only keys
+
+## [0.1.6] - 2026-02-16
+
+### Changed
+
+- Updated compatibility for Textual 8 APIs and typing.
+
+## [0.1.5] - 2026-02-12
+
+### Added
+
+- Display download progress in megabytes in the main view.
+
+### Fixed
+
+- Re-centered the progress bar in the updated responsive layout.
+
+### Changed
+
+- Improved responsive behavior of the main layout and column proportions.
+- Polished modal styling and help screen density/alignment for better readability.
+
+## [0.1.4] - 2026-01-19
+
+### Fixed
+
+- Centered the progress bar container.
+- Constrained progress bar width to prevent layout overflow.
+
+## [0.1.3] - 2026-01-09
+
+### Changed
+
+- Improved library fetching performance by requesting pages concurrently.
+
+## [0.1.2] - 2026-01-06
+
+### Added
+
+- Added a shared search helper module.
+- Added test configuration and development dependencies.
+- Added test coverage for filter/search helpers, cache and URL helpers, library parsing, table utilities, email extraction, and filter debounce behavior.
+
+### Changed
+
+- Refactored existing search/filter logic to use shared helpers.
+- Improved packaging and CI setup for project distribution.
+
+## [0.1.1] - 2026-01-06
+
+### Added
+
+- Added playback speed controls with up/down key bindings.
+- Added an `f` key binding to toggle finished/unfinished status.
+- Added responsive table columns and a redesigned top bar/help experience.
+- Added a stats screen with listening/account statistics and persisted email config.
+- Added a debounced filter view with cached search and refresh toggle.
+
+### Changed
+
+- Refined UI layout and styling with a broad responsive redesign.
+- Updated behavior so finished books are removed from cache.
+
+### Fixed
+
+- Corrected Python version and installation compatibility details for Audible/pipx environments.
+
+## [0.1.0] - 2025-12-25
+
+FIRST VERSION

README.md

@@ -1,32 +1,173 @@
 # auditui
 
-A terminal-based user interface (TUI) client for Audible, written in Python 3.
+A terminal-based user interface (TUI) client for [Audible](https://www.audible.fr/), written in Python 3.
 
-Listen to your audiobooks or podcasts, browse your library, search for new titles, add them to your wishlist, and more.
+The interface currently ships with a single built-in theme.
 
-## What it does
+## Requirements
 
-For now, it can:
+- [Python](https://www.python.org/) 3.10-3.12 (3.13+ is not yet supported by `audible` module)
+- [ffmpeg](https://ffmpeg.org/) installed to play audio files.
 
-- [x] list your entire library
+## Features
-- [x] list your unfinished books with progress information
-- [ ] play a book (start when it was last paused, mark the position when it's paused)
-- [ ] open a pdf if one's attached to the book
-- [ ] mark a book as finished
-- [ ] mark a book as unfinished
-- [ ] search for new titles
-- [ ] add a book to your wishlist
 
-Once it'll do all of this (more or less), I'll think of a better code structure and the TUI interface.
+- **Browse your library**: View all your Audible audiobooks in a clean, terminal-based interface
+- **Offline playback**: Download audiobooks to your local cache and listen without an internet connection
+- **Playback controls**: Play, pause, seek, adjust playback speed, and navigate between chapters
+- **Library management**: Filter your library, sort by name or progress, and mark books as finished
+- **Progress tracking**: See your listening progress for each book and resume where you left off
+- **Statistics**: View listening statistics and library overview
+- **Keyboard-driven**: Fully navigable with keyboard shortcuts for efficient use
+- **Two-factor authentication**: Supports OTP for secure login
 
-I'm still experimenting the `audible` library and its API.
+## Installation
 
-## Credentials
+Use [`pipx`](https://pipx.pypa.io/latest/installation/) to install `auditui`:
+
+```bash
+pipx install git+https://git.kharec.info/Kharec/auditui.git
+```
+
+Check the version to ensure installation was successful:
+
+```bash
+auditui --version
+```
+
+All set, run `auditui configure` to set up authentication, and then `auditui` to start the TUI.
+
+### Workaround for Python 3.13 Linux distributions
+
+On some Linux distributions, Python 3.13 is already the default. In that case, install Python 3.12 manually before using `pipx`.
+
+For Arch Linux:
+
+```bash
+yay -S python312
+```
+
+Once you have Python 3.12, run:
+
+```bash
+pipx install git+https://git.kharec.info/Kharec/auditui.git --python python3.12
+```
+
+This workaround is temporary and depends on upstream `audible` compatibility updates.
+
+## Upgrade
+
+Assuming it's already installed, use `pipx` to upgrade auditui:
+
+```bash
+pipx upgrade auditui
+```
+
+## Keybindings
+
+| Key          | Action                     |
+| ------------ | -------------------------- |
+| `/`          | Filter library             |
+| `?`          | Show help screen           |
+| `enter`      | Play the selected book     |
+| `space`      | Pause/resume the playback  |
+| `escape`     | Clear filter               |
+| `ctrl+left`  | Go to the previous chapter |
+| `ctrl+right` | Go to the next chapter     |
+| `up`         | Increase playback speed    |
+| `down`       | Decrease playback speed    |
+| `left`       | Seek backward 30 seconds   |
+| `right`      | Seek forward 30 seconds    |
+| `a`          | Show all/unfinished        |
+| `d`          | Toggle download/delete     |
+| `f`          | Mark as finished           |
+| `n`          | Sort by name               |
+| `p`          | Sort by progress           |
+| `q`          | Quit the application       |
+| `r`          | Refresh view               |
+| `s`          | Show stats screen          |
+
+## Cache
+
+Books are downloaded to `~/.cache/auditui/books`.
+
+Downloaded files use a normalized `Author_Title.aax` naming format. For example, `Stephen King` and `11/22/63` become `Stephen-King_11-22-63.aax`.
+
+The `d` key toggles the download state for the selected book: if the book is not cached, pressing `d` will download it; if it's already cached, pressing `d` will delete it from the cache.
+
+To check the total size of your cache:
+
+```bash
+du -sh ~/.cache/auditui/books
+```
+
+Or the size of individual books:
+
+```bash
+du -h ~/.cache/auditui/books/*
+```
+
+Clean all the cache (if necessary) with:
+
+```bash
+rm -rf ~/.cache/auditui/books/*
+```
+
+## Authentication / credentials
 
 Login is handled and credentials are stored in `~/.config/auditui/auth.json`.
 
+When running `auditui configure`, you will be prompted for:
+
+- **Email**: Your Audible account email address
+- **Password**: Your Audible account password (input is hidden)
+- **Marketplace locale**: The regional marketplace you want to connect to (defaults to `US` if left empty)
+
+The marketplace locale determines which Audible region you access, affecting available audiobooks in your library. Common marketplace codes include:
+
+- `US` - United States (default)
+- `UK` - United Kingdom
+- `DE` - Germany
+- `FR` - France
+- `CA` - Canada
+- `AU` - Australia
+- `IT` - Italy
+- `ES` - Spain
+- `JP` - Japan
+
+To change your marketplace after initial configuration, simply run `auditui configure` again and select a different locale when prompted. But you should probably just stick with the marketplace you used when you first created your Audible account.
+
 OTP is supported if you use a two-factor authentication device.
 
+## Hacking
+
+This project uses [uv](https://github.com/astral-sh/uv) for dependency management, the TUI is built with [Textual](https://textual.textualize.io/) (currently `textual>=8.0.0`).
+
+```bash
+# install dependencies (creates .venv)
+$ uv sync
+# modify the code...
+# ...and run the TUI
+$ uv run auditui
+```
+
+Don't forget to run the tests.
+
+## Testing
+
+As usual, tests are located in `tests` directory and use `pytest`.
+
+Get the dev dependencies:
+
+```bash
+uv sync --extra dev
+```
+
+And run the tests:
+
+```bash
+uv run pytest
+```
+
 ## License
 
 This project is licensed under the GPLv3+ License. See the [LICENSE](LICENSE) file for details.

auditui/__init__.py

@@ -0,0 +1,3 @@
+"""Auditui: Audible TUI client"""
+
+__version__ = "0.2.0"

auditui/app/__init__.py

@@ -0,0 +1,30 @@
+"""Main Textual app: table, bindings, and orchestration of library, playback, and downloads."""
+
+from __future__ import annotations
+
+from textual.app import App, ComposeResult
+
+from ..constants import TABLE_CSS
+
+from .bindings import BINDINGS
+from .state import init_auditui_state
+from .layout import AppLayoutMixin
+from .table import AppTableMixin
+from .library import AppLibraryMixin
+from .actions import AppActionsMixin
+from .progress import AppProgressMixin
+
+
+class Auditui(App, AppProgressMixin, AppActionsMixin, AppLibraryMixin, AppTableMixin, AppLayoutMixin):
+    """Orchestrates the library table, playback, downloads, filter, and modal screens."""
+
+    SHOW_PALETTE = False
+    BINDINGS = BINDINGS
+    CSS = TABLE_CSS
+
+    def compose(self) -> ComposeResult:
+        yield from AppLayoutMixin.compose(self)
+
+    def __init__(self, auth=None, client=None) -> None:
+        super().__init__()
+        init_auditui_state(self, auth, client)

auditui/app/actions.py

@@ -0,0 +1,180 @@
+"""Selection, playback/download/finish actions, modals, and filter."""
+
+from __future__ import annotations
+
+from textual import work
+from textual.widgets import DataTable
+
+from ..constants import SEEK_SECONDS
+from ..ui import FilterScreen, HelpScreen, StatsScreen
+
+
+class AppActionsMixin:
+    def _get_selected_item(self) -> dict | None:
+        """Return the currently selected library item from the table."""
+        table = self.query_one("#library_table", DataTable)
+        if table.row_count == 0:
+            self.update_status("No books available")
+            return None
+        cursor_row = table.cursor_row
+        if cursor_row >= len(self.current_items):
+            self.update_status("Invalid selection")
+            return None
+        return self.current_items[cursor_row]
+
+    def _get_naming_hints(self, item: dict | None) -> tuple[str | None, str | None]:
+        """Return preferred title and author values used for download filenames."""
+        if not item or not self.library_client:
+            return (None, None)
+        return (
+            self.library_client.extract_title(item),
+            self.library_client.extract_authors(item),
+        )
+
+    def _get_selected_asin(self) -> str | None:
+        if not self.download_manager:
+            self.update_status("Not authenticated. Please restart and authenticate.")
+            return None
+        if not self.library_client:
+            self.update_status("Library client not available")
+            return None
+        selected_item = self._get_selected_item()
+        if not selected_item:
+            return None
+        asin = self.library_client.extract_asin(selected_item)
+        if not asin:
+            self.update_status("Could not get ASIN for selected book")
+            return None
+        return asin
+
+    def action_play_selected(self) -> None:
+        asin = self._get_selected_asin()
+        if asin:
+            self._start_playback_async(asin, self._get_selected_item())
+
+    def action_toggle_playback(self) -> None:
+        if not self.playback.toggle_playback():
+            self._no_playback_message()
+
+    def action_seek_forward(self) -> None:
+        if not self.playback.seek_forward(SEEK_SECONDS):
+            self._no_playback_message()
+
+    def action_seek_backward(self) -> None:
+        if not self.playback.seek_backward(SEEK_SECONDS):
+            self._no_playback_message()
+
+    def action_next_chapter(self) -> None:
+        if not self.playback.seek_to_next_chapter():
+            self._no_playback_message()
+
+    def action_previous_chapter(self) -> None:
+        if not self.playback.seek_to_previous_chapter():
+            self._no_playback_message()
+
+    def action_increase_speed(self) -> None:
+        if not self.playback.increase_speed():
+            self._no_playback_message()
+
+    def action_decrease_speed(self) -> None:
+        if not self.playback.decrease_speed():
+            self._no_playback_message()
+
+    def action_toggle_finished(self) -> None:
+        asin = self._get_selected_asin()
+        if asin:
+            self._toggle_finished_async(asin)
+
+    @work(exclusive=True, thread=True)
+    def _toggle_finished_async(self, asin: str) -> None:
+        if not self.library_client:
+            return
+
+        selected_item = None
+        for item in self.current_items:
+            if self.library_client.extract_asin(item) == asin:
+                selected_item = item
+                break
+
+        if not selected_item:
+            return
+
+        if self.library_client.is_finished(selected_item):
+            self.call_from_thread(self.update_status, "Already marked as finished")
+            return
+
+        success = self.library_client.mark_as_finished(asin, selected_item)
+        message = "Marked as finished" if success else "Failed to mark as finished"
+
+        self.call_from_thread(self.update_status, message)
+        if success:
+            if self.download_manager and self.download_manager.is_cached(asin):
+                self.download_manager.remove_cached(
+                    asin, notify=self._thread_status_update
+                )
+            self.call_from_thread(self.fetch_library)
+
+    def _no_playback_message(self) -> None:
+        self.update_status("No playback active. Press Enter to play a book.")
+
+    def action_show_help(self) -> None:
+        self.push_screen(HelpScreen())
+
+    def action_show_stats(self) -> None:
+        self.push_screen(StatsScreen())
+
+    def action_filter(self) -> None:
+        self.push_screen(
+            FilterScreen(
+                self.filter_text,
+                on_change=self._apply_filter,
+            ),
+            self._apply_filter,
+        )
+
+    def action_clear_filter(self) -> None:
+        if self.filter_text:
+            self.filter_text = ""
+            self._refresh_filtered_view()
+            self.update_status("Filter cleared")
+
+    def _apply_filter(self, filter_text: str | None) -> None:
+        self.filter_text = filter_text or ""
+        self._refresh_filtered_view()
+
+    def action_toggle_download(self) -> None:
+        asin = self._get_selected_asin()
+        if asin:
+            self._toggle_download_async(asin, self._get_selected_item())
+
+    @work(exclusive=True, thread=True)
+    def _toggle_download_async(self, asin: str, item: dict | None = None) -> None:
+        if not self.download_manager:
+            return
+
+        preferred_title, preferred_author = self._get_naming_hints(item)
+
+        if self.download_manager.is_cached(asin):
+            self.download_manager.remove_cached(asin, self._thread_status_update)
+        else:
+            self.download_manager.get_or_download(
+                asin,
+                self._thread_status_update,
+                preferred_title=preferred_title,
+                preferred_author=preferred_author,
+            )
+
+        self.call_from_thread(self._refresh_table)
+
+    @work(exclusive=True, thread=True)
+    def _start_playback_async(self, asin: str, item: dict | None = None) -> None:
+        if not self.download_manager:
+            return
+        preferred_title, preferred_author = self._get_naming_hints(item)
+        self.playback.prepare_and_start(
+            self.download_manager,
+            asin,
+            self._thread_status_update,
+            preferred_title,
+            preferred_author,
+        )

auditui/app/bindings.py

@@ -0,0 +1,25 @@
+"""Key bindings for the main app."""
+
+from textual.binding import Binding
+
+BINDINGS = [
+    ("?", "show_help", "Help"),
+    ("s", "show_stats", "Stats"),
+    ("/", "filter", "Filter"),
+    ("escape", "clear_filter", "Clear filter"),
+    ("n", "sort", "Sort by name"),
+    ("p", "sort_by_progress", "Sort by progress"),
+    ("a", "show_all", "All/Unfinished"),
+    ("r", "refresh", "Refresh"),
+    ("enter", "play_selected", "Play"),
+    Binding("space", "toggle_playback", "Pause/Resume", priority=True),
+    ("left", "seek_backward", "-30s"),
+    ("right", "seek_forward", "+30s"),
+    ("ctrl+left", "previous_chapter", "Previous chapter"),
+    ("ctrl+right", "next_chapter", "Next chapter"),
+    ("up", "increase_speed", "Increase speed"),
+    ("down", "decrease_speed", "Decrease speed"),
+    ("f", "toggle_finished", "Mark finished"),
+    ("d", "toggle_download", "Download/Delete"),
+    ("q", "quit", "Quit"),
+]

auditui/app/layout.py

@@ -0,0 +1,111 @@
+"""Main layout: compose, mount, resize, status bar, table column widths."""
+
+from __future__ import annotations
+
+from textual.app import ComposeResult
+from textual.containers import Horizontal
+from textual.events import Resize
+from textual.widgets import DataTable, ProgressBar, Static
+
+from .. import __version__
+from ..constants import TABLE_COLUMN_DEFS
+
+
+class AppLayoutMixin:
+    def compose(self) -> ComposeResult:
+        yield Horizontal(
+            Static("? Help", id="top_left"),
+            Static(f"Auditui v{__version__}", id="top_center"),
+            Static("q Quit", id="top_right"),
+            id="top_bar",
+        )
+        yield Static("Loading...", id="status")
+        table = DataTable(id="library_table")
+        table.zebra_stripes = True
+        table.cursor_type = "row"
+        yield table
+        yield Static("", id="progress_info")
+        with Horizontal(id="progress_bar_container"):
+            yield ProgressBar(
+                id="progress_bar", show_eta=False, show_percentage=False, total=100
+            )
+
+    def on_mount(self) -> None:
+        self.theme = "textual-dark"
+        self.call_after_refresh(self._init_table_and_intervals)
+
+    def _init_table_and_intervals(self) -> None:
+        table = self.query_one("#library_table", DataTable)
+        for column_name, _ratio in TABLE_COLUMN_DEFS:
+            table.add_column(column_name)
+        self.call_after_refresh(lambda: self._apply_column_widths(table))
+        column_keys = list(table.columns.keys())
+        self.title_column_key = column_keys[0]
+
+        if self.client:
+            self.update_status("Fetching library...")
+            self.fetch_library()
+        else:
+            self.update_status(
+                "Not authenticated. Please restart and authenticate.")
+
+        self.set_interval(1.0, self._check_playback_status)
+        self.set_interval(0.5, self._update_progress)
+        self.set_interval(30.0, self._save_position_periodically)
+
+    def on_unmount(self) -> None:
+        self.playback.stop()
+        if self.download_manager:
+            self.download_manager.close()
+
+    def on_resize(self, event: Resize) -> None:
+        del event
+        try:
+            table = self.query_one("#library_table", DataTable)
+        except Exception:
+            return
+        self.call_after_refresh(lambda: self._apply_column_widths(table))
+
+    def update_status(self, message: str) -> None:
+        status = self.query_one("#status", Static)
+        status.display = True
+        status.update(message)
+
+    def _apply_column_widths(self, table: DataTable) -> None:
+        if not table.columns:
+            return
+
+        column_keys = list(table.columns.keys())
+        num_cols = len(column_keys)
+        ratios = [ratio for _, ratio in TABLE_COLUMN_DEFS]
+        total_ratio = sum(ratios) or num_cols
+
+        content_width = table.scrollable_content_region.width
+        if content_width <= 0:
+            content_width = table.size.width
+        if content_width <= 0:
+            return
+
+        padding_total = 2 * table.cell_padding * num_cols
+        distributable = max(num_cols, content_width - padding_total)
+
+        widths = []
+        for ratio in ratios:
+            w = max(1, (distributable * ratio) // total_ratio)
+            widths.append(w)
+
+        remainder = distributable - sum(widths)
+        if remainder > 0:
+            indices = sorted(
+                range(num_cols), key=lambda i: ratios[i], reverse=True)
+            for i in range(remainder):
+                widths[indices[i % num_cols]] += 1
+
+        for column_key, w in zip(column_keys, widths):
+            col = table.columns[column_key]
+            col.auto_width = False
+            col.width = w
+        table.refresh()
+
+    def _thread_status_update(self, message: str) -> None:
+        self.call_from_thread(self.update_status, message)

auditui/app/library.py

@@ -0,0 +1,35 @@
+"""Library fetch and load/error handlers."""
+
+from __future__ import annotations
+
+from textual import work
+from textual.worker import get_current_worker
+
+from ..types import LibraryItem
+
+
+class AppLibraryMixin:
+    @work(exclusive=True, thread=True)
+    def fetch_library(self) -> None:
+        worker = get_current_worker()
+        if worker.is_cancelled or not self.library_client:
+            return
+
+        try:
+            all_items = self.library_client.fetch_all_items(self._thread_status_update)
+            self.call_from_thread(self.on_library_loaded, all_items)
+        except (OSError, ValueError, KeyError) as exc:
+            self.call_from_thread(self.on_library_error, str(exc))
+
+    def on_library_loaded(self, items: list[LibraryItem]) -> None:
+        """Store fetched items and refresh the active library view."""
+        self.all_items = items
+        self._search_text_cache.clear()
+        self.update_status(f"Loaded {len(items)} books")
+        if self.show_all_mode:
+            self.show_all()
+        else:
+            self.show_unfinished()
+
+    def on_library_error(self, error: str) -> None:
+        self.update_status(f"Error fetching library: {error}")

auditui/app/progress.py

@@ -0,0 +1,94 @@
+"""Playback key handling, progress bar updates, and position save."""
+
+from __future__ import annotations
+
+from textual.containers import Horizontal
+from textual.events import Key
+from textual.widgets import DataTable, ProgressBar, Static
+
+from ..library import LibraryClient
+
+
+class AppProgressMixin:
+    def on_key(self, event: Key) -> None:
+        if self.playback.is_playing:
+            if event.key == "ctrl+left":
+                event.prevent_default()
+                self.action_previous_chapter()
+                return
+            elif event.key == "ctrl+right":
+                event.prevent_default()
+                self.action_next_chapter()
+                return
+            elif event.key == "left":
+                event.prevent_default()
+                self.action_seek_backward()
+                return
+            elif event.key == "right":
+                event.prevent_default()
+                self.action_seek_forward()
+                return
+            elif event.key == "up":
+                event.prevent_default()
+                self.action_increase_speed()
+                return
+            elif event.key == "down":
+                event.prevent_default()
+                self.action_decrease_speed()
+                return
+
+        if isinstance(self.focused, DataTable):
+            if event.key == "enter":
+                event.prevent_default()
+                self.action_play_selected()
+            elif event.key == "space":
+                event.prevent_default()
+                self.action_toggle_playback()
+
+    def _check_playback_status(self) -> None:
+        message = self.playback.check_status()
+        if message:
+            self.update_status(message)
+            self._hide_progress()
+
+    def _update_progress(self) -> None:
+        if not self.playback.is_playing:
+            self._hide_progress()
+            return
+
+        progress_data = self.playback.get_current_progress()
+        if not progress_data:
+            self._hide_progress()
+            return
+
+        chapter_name, chapter_elapsed, chapter_total = progress_data
+        if chapter_total <= 0:
+            self._hide_progress()
+            return
+
+        progress_info = self.query_one("#progress_info", Static)
+        progress_bar = self.query_one("#progress_bar", ProgressBar)
+        progress_bar_container = self.query_one(
+            "#progress_bar_container", Horizontal)
+
+        progress_percent = min(
+            100.0, max(0.0, (chapter_elapsed / chapter_total) * 100.0)
+        )
+        progress_bar.update(progress=progress_percent)
+        chapter_elapsed_str = LibraryClient.format_time(chapter_elapsed)
+        chapter_total_str = LibraryClient.format_time(chapter_total)
+        progress_info.update(
+            f"{chapter_name} | {chapter_elapsed_str} / {chapter_total_str}"
+        )
+        progress_info.display = True
+        progress_bar_container.display = True
+
+    def _hide_progress(self) -> None:
+        progress_info = self.query_one("#progress_info", Static)
+        progress_bar_container = self.query_one(
+            "#progress_bar_container", Horizontal)
+        progress_info.display = False
+        progress_bar_container.display = False
+
+    def _save_position_periodically(self) -> None:
+        self.playback.update_position_if_needed()

auditui/app/state.py

@@ -0,0 +1,31 @@
+"""App state initialization."""
+
+from __future__ import annotations
+
+from ..constants import PROGRESS_COLUMN_INDEX
+from ..downloads import DownloadManager
+from ..library import LibraryClient
+from ..playback import PlaybackController
+
+
+def init_auditui_state(self: object, auth=None, client=None) -> None:
+    setattr(self, "auth", auth)
+    setattr(self, "client", client)
+    setattr(self, "library_client", LibraryClient(client) if client else None)
+    setattr(
+        self,
+        "download_manager",
+        DownloadManager(auth, client) if auth and client else None,
+    )
+    notify = getattr(self, "update_status")
+    lib_client = LibraryClient(client) if client else None
+    setattr(self, "playback", PlaybackController(notify, lib_client))
+    setattr(self, "all_items", [])
+    setattr(self, "current_items", [])
+    setattr(self, "_search_text_cache", {})
+    setattr(self, "show_all_mode", False)
+    setattr(self, "filter_text", "")
+    setattr(self, "title_sort_reverse", False)
+    setattr(self, "progress_sort_reverse", False)
+    setattr(self, "title_column_key", None)
+    setattr(self, "progress_column_index", PROGRESS_COLUMN_INDEX)

auditui/app/table.py

@@ -0,0 +1,129 @@
+"""Table population, sorting, filter view, and search cache."""
+
+from __future__ import annotations
+
+from ..library import (
+    filter_items,
+    filter_unfinished_items,
+    format_item_as_row,
+    create_progress_sort_key,
+    create_title_sort_key,
+)
+from ..types import LibraryItem
+from textual.widgets import DataTable, Static
+
+
+class AppTableMixin:
+    def _populate_table(self, items: list[LibraryItem]) -> None:
+        """Render library items into the table with stable unique row keys."""
+        table = self.query_one("#library_table", DataTable)
+        table.clear()
+
+        if not items or not self.library_client:
+            self.update_status("No books found.")
+            return
+
+        used_keys: set[str] = set()
+        for index, item in enumerate(items):
+            title, author, runtime, progress, downloaded = format_item_as_row(
+                item, self.library_client, self.download_manager
+            )
+            row_key = self._build_row_key(item, title, index, used_keys)
+            table.add_row(title, author, runtime, progress, downloaded, key=row_key)
+
+        self.current_items = items
+        status = self.query_one("#status", Static)
+        status.display = False
+        self._apply_column_widths(table)
+
+    def _build_row_key(
+        self,
+        item: LibraryItem,
+        title: str,
+        index: int,
+        used_keys: set[str],
+    ) -> str:
+        """Return a unique table row key derived from ASIN when available."""
+        asin = self.library_client.extract_asin(item) if self.library_client else None
+        base_key = asin or f"{title}#{index}"
+        if base_key not in used_keys:
+            used_keys.add(base_key)
+            return base_key
+
+        suffix = 2
+        candidate = f"{base_key}#{suffix}"
+        while candidate in used_keys:
+            suffix += 1
+            candidate = f"{base_key}#{suffix}"
+        used_keys.add(candidate)
+        return candidate
+
+    def _refresh_table(self) -> None:
+        if self.current_items:
+            self._populate_table(self.current_items)
+
+    def show_all(self) -> None:
+        if not self.all_items:
+            return
+        self.show_all_mode = True
+        self._refresh_filtered_view()
+
+    def show_unfinished(self) -> None:
+        if not self.all_items or not self.library_client:
+            return
+        self.show_all_mode = False
+        self._refresh_filtered_view()
+
+    def action_sort(self) -> None:
+        table = self.query_one("#library_table", DataTable)
+        if table.row_count > 0 and self.title_column_key:
+            title_key, reverse = create_title_sort_key(self.title_sort_reverse)
+            table.sort(key=title_key, reverse=reverse)
+            self.title_sort_reverse = not self.title_sort_reverse
+
+    def action_sort_by_progress(self) -> None:
+        table = self.query_one("#library_table", DataTable)
+        if table.row_count > 0:
+            self.progress_sort_reverse = not self.progress_sort_reverse
+            progress_key, reverse = create_progress_sort_key(
+                self.progress_column_index, self.progress_sort_reverse
+            )
+            table.sort(key=progress_key, reverse=reverse)
+
+    def action_show_all(self) -> None:
+        if self.show_all_mode:
+            self.show_unfinished()
+        else:
+            self.show_all()
+
+    def _refresh_filtered_view(self) -> None:
+        if not self.all_items:
+            return
+
+        items = self.all_items
+
+        if self.filter_text:
+            items = filter_items(items, self.filter_text, self._get_search_text)
+            self._populate_table(items)
+            self.update_status(f"Filter: '{self.filter_text}' ({len(items)} books)")
+            return
+
+        if not self.show_all_mode and self.library_client:
+            items = filter_unfinished_items(items, self.library_client)
+
+        self._populate_table(items)
+
+    def _get_search_text(self, item: LibraryItem) -> str:
+        cache_key = id(item)
+        cached = self._search_text_cache.get(cache_key)
+        if cached is not None:
+            return cached
+        from ..library import build_search_text
+
+        search_text = build_search_text(item, self.library_client)
+        self._search_text_cache[cache_key] = search_text
+        return search_text
+
+    def _prime_search_cache(self, items: list[LibraryItem]) -> None:
+        for item in items:
+            self._get_search_text(item)

auditui/auth/__init__.py

@@ -0,0 +1,26 @@
+"""Load saved Audible credentials and build authenticator and API client."""
+
+from pathlib import Path
+
+import audible
+
+from ..constants import AUTH_PATH
+
+
+def authenticate(
+    auth_path: Path = AUTH_PATH,
+) -> tuple[audible.Authenticator, audible.Client]:
+    """Load auth from file and return (Authenticator, Client). Raises if file missing or invalid."""
+    if not auth_path.exists():
+        raise FileNotFoundError(
+            "Authentication file not found. Please run 'auditui configure' to set up authentication."
+        )
+
+    try:
+        authenticator = audible.Authenticator.from_file(str(auth_path))
+        audible_client = audible.Client(auth=authenticator)
+        return authenticator, audible_client
+    except (OSError, ValueError, KeyError) as exc:
+        raise ValueError(
+            f"Failed to load existing authentication: {exc}"
+        ) from exc

auditui/cli/__init__.py

@@ -0,0 +1,5 @@
+"""CLI package; entry point is main() from .main."""
+
+from .main import main
+
+__all__ = ["main"]

auditui/cli/main.py

@@ -0,0 +1,52 @@
+"""CLI entrypoint: configure subcommand or authenticate and run the TUI."""
+
+import argparse
+import sys
+
+from auditui import __version__
+from auditui.app import Auditui
+from auditui.auth import authenticate
+from auditui.configure import configure
+from auditui.constants import AUTH_PATH
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(prog="auditui")
+    parser.add_argument(
+        "-v",
+        "--version",
+        action="version",
+        version=f"auditui {__version__}",
+    )
+    subparsers = parser.add_subparsers(dest="command")
+    subparsers.add_parser("configure", help="Set up authentication")
+
+    args = parser.parse_args()
+
+    if args.command == "configure":
+        try:
+            configure()
+            print("Configuration completed successfully.")
+        except Exception as exc:
+            print(f"Configuration error: {exc}")
+            sys.exit(1)
+        return
+
+    config_dir = AUTH_PATH.parent
+
+    if not config_dir.exists():
+        print("No configuration yet, please run 'auditui configure'.")
+        sys.exit(1)
+
+    try:
+        auth, client = authenticate()
+    except Exception as exc:
+        print(f"Authentication error: {exc}")
+        if not AUTH_PATH.exists():
+            print("No configuration yet, please run 'auditui configure'.")
+        else:
+            print("Please re-authenticate by running 'auditui configure'.")
+        sys.exit(1)
+
+    app = Auditui(auth=auth, client=client)
+    app.run()

auditui/configure/__init__.py

@@ -0,0 +1,45 @@
+"""Interactive setup of Audible credentials; writes auth and config files."""
+
+import json
+from getpass import getpass
+from pathlib import Path
+
+import audible
+
+from ..constants import AUTH_PATH, CONFIG_PATH
+
+
+def configure(
+    auth_path: Path = AUTH_PATH,
+) -> tuple[audible.Authenticator, audible.Client]:
+    """Prompt for email/password/locale, authenticate, and save auth.json and config.json."""
+    if auth_path.exists():
+        response = input(
+            "Configuration already exists. Are you sure you want to overwrite it? (y/N): "
+        ).strip().lower()
+        if response not in ("yes", "y"):
+            print("Configuration cancelled.")
+            raise SystemExit(0)
+
+    print("Please authenticate with your Audible account.")
+
+    email = input("\nEmail: ")
+    password = getpass("Password: ")
+    marketplace = input(
+        "Marketplace locale (default: US): "
+    ).strip().upper() or "US"
+
+    authenticator = audible.Authenticator.from_login(
+        username=email, password=password, locale=marketplace
+    )
+
+    auth_path.parent.mkdir(parents=True, exist_ok=True)
+    authenticator.to_file(str(auth_path))
+
+    config = {"email": email}
+    with open(CONFIG_PATH, "w", encoding="utf-8") as f:
+        json.dump(config, f)
+
+    print("Authentication successful!")
+    audible_client = audible.Client(auth=authenticator)
+    return authenticator, audible_client

auditui/constants/__init__.py

@@ -0,0 +1,29 @@
+"""Compatibility exports for constants grouped by domain modules."""
+
+from .downloads import DEFAULT_CHUNK_SIZE, DEFAULT_CODEC, DOWNLOAD_URL, MIN_FILE_SIZE
+from .library import (
+    AUTHOR_NAME_DISPLAY_LENGTH,
+    AUTHOR_NAME_MAX_LENGTH,
+    PROGRESS_COLUMN_INDEX,
+)
+from .paths import AUTH_PATH, CACHE_DIR, CONFIG_PATH
+from .playback import SEEK_SECONDS
+from .table import TABLE_COLUMN_DEFS
+from .ui import TABLE_CSS
+
+
+__all__ = [
+    "AUTH_PATH",
+    "CONFIG_PATH",
+    "CACHE_DIR",
+    "DOWNLOAD_URL",
+    "DEFAULT_CODEC",
+    "MIN_FILE_SIZE",
+    "DEFAULT_CHUNK_SIZE",
+    "TABLE_COLUMN_DEFS",
+    "AUTHOR_NAME_MAX_LENGTH",
+    "AUTHOR_NAME_DISPLAY_LENGTH",
+    "PROGRESS_COLUMN_INDEX",
+    "SEEK_SECONDS",
+    "TABLE_CSS",
+]

auditui/constants/downloads.py

@@ -0,0 +1,6 @@
+"""Download-related constants for Audible file retrieval."""
+
+DOWNLOAD_URL = "https://cde-ta-g7g.amazon.com/FionaCDEServiceEngine/FSDownloadContent"
+DEFAULT_CODEC = "LC_128_44100_stereo"
+MIN_FILE_SIZE = 1024 * 1024
+DEFAULT_CHUNK_SIZE = 8192

auditui/constants/library.py

@@ -0,0 +1,5 @@
+"""Library and table formatting constants."""
+
+AUTHOR_NAME_MAX_LENGTH = 40
+AUTHOR_NAME_DISPLAY_LENGTH = 37
+PROGRESS_COLUMN_INDEX = 3

auditui/constants/paths.py

@@ -0,0 +1,8 @@
+"""Filesystem paths used by configuration and caching."""
+
+from pathlib import Path
+
+
+AUTH_PATH = Path.home() / ".config" / "auditui" / "auth.json"
+CONFIG_PATH = Path.home() / ".config" / "auditui" / "config.json"
+CACHE_DIR = Path.home() / ".cache" / "auditui" / "books"

auditui/constants/playback.py

@@ -0,0 +1,3 @@
+"""Playback behavior constants."""
+
+SEEK_SECONDS = 30.0

auditui/constants/table.py

@@ -0,0 +1,9 @@
+"""Main library table column definitions."""
+
+TABLE_COLUMN_DEFS = (
+    ("Title", 4),
+    ("Author", 3),
+    ("Length", 1),
+    ("Progress", 1),
+    ("Downloaded", 1),
+)

auditui/constants/ui.py

@@ -0,0 +1,255 @@
+"""Textual CSS constants for the application UI."""
+
+TABLE_CSS = """
+Screen {
+    background: #141622;
+}
+
+#top_bar {
+    background: #10131f;
+    color: #d5d9f0;
+    text-style: bold;
+    height: 1;
+    margin: 0;
+    padding: 0;
+}
+
+#top_left,
+#top_center,
+#top_right {
+    width: 1fr;
+    padding: 0 1;
+    background: #10131f;
+    margin: 0;
+}
+
+#top_left {
+    text-align: left;
+}
+
+#top_center {
+    text-align: center;
+}
+
+#top_right {
+    text-align: right;
+}
+
+DataTable {
+    width: 100%;
+    height: 1fr;
+    background: #141622;
+    color: #c7cfe8;
+    border: solid #262a3f;
+    scrollbar-size-horizontal: 0;
+}
+
+DataTable:focus {
+    border: solid #7aa2f7;
+}
+
+DataTable > .datatable--header {
+    background: #1b2033;
+    color: #b9c3e3;
+    text-style: bold;
+}
+
+DataTable > .datatable--cursor {
+    background: #232842;
+    color: #e6ebff;
+}
+
+DataTable > .datatable--odd-row {
+    background: #121422;
+}
+
+DataTable > .datatable--even-row {
+    background: #15182a;
+}
+
+Static {
+    height: 1;
+    text-align: center;
+    background: #10131f;
+    color: #c7cfe8;
+}
+
+Static#status {
+    color: #b6bfdc;
+}
+
+Static#progress_info {
+    color: #7aa2f7;
+    text-style: bold;
+    margin: 0;
+    padding: 0;
+    text-align: center;
+    width: 100%;
+}
+
+#progress_bar_container {
+    align: center middle;
+    width: 100%;
+    height: 1;
+}
+
+ProgressBar#progress_bar {
+    height: 1;
+    background: #10131f;
+    border: none;
+    margin: 0;
+    padding: 0;
+    width: 50%;
+}
+
+ProgressBar#progress_bar Bar {
+    width: 100%;
+}
+
+ProgressBar#progress_bar > .progress-bar--track {
+    background: #262a3f;
+}
+
+ProgressBar#progress_bar > .progress-bar--bar {
+    background: #8bd5ca;
+}
+
+HelpScreen,
+StatsScreen,
+FilterScreen {
+    align: center middle;
+    background: rgba(0, 0, 0, 0.7);
+}
+
+HelpScreen Static,
+StatsScreen Static,
+FilterScreen Static {
+    background: transparent;
+}
+
+StatsScreen #help_container {
+    width: auto;
+    min-width: 55;
+    max-width: 70;
+}
+
+StatsScreen #help_content {
+    align: center middle;
+    width: 100%;
+}
+
+StatsScreen .help_list {
+    width: 100%;
+}
+
+StatsScreen .help_list > ListItem {
+    background: transparent;
+    height: 1;
+}
+
+StatsScreen .help_list > ListItem:hover {
+    background: #232842;
+}
+
+StatsScreen .help_list > ListItem > Label {
+    width: 100%;
+    text-align: left;
+    padding-left: 2;
+}
+
+#help_container {
+    width: 72%;
+    max-width: 90;
+    min-width: 44;
+    height: auto;
+    max-height: 80%;
+    min-height: 14;
+    background: #181a2a;
+    border: heavy #7aa2f7;
+    padding: 1 1;
+}
+
+#help_title {
+    width: 100%;
+    height: 2;
+    text-align: center;
+    text-style: bold;
+    color: #7aa2f7;
+    content-align: center middle;
+    margin-bottom: 0;
+    border-bottom: solid #4b5165;
+}
+
+#help_content {
+    width: 100%;
+    height: auto;
+    padding: 0;
+    margin: 0 0 1 0;
+    align: center middle;
+}
+
+.help_list {
+    width: 100%;
+    height: auto;
+    background: transparent;
+    padding: 0;
+    scrollbar-size: 0 0;
+}
+
+.help_list > ListItem {
+    background: #1b1f33;
+    padding: 0 1;
+    height: 1;
+}
+
+.help_list > ListItem:hover {
+    background: #2a2f45;
+}
+
+.help_list > ListItem > Label {
+    width: 100%;
+    padding: 0;
+}
+
+#help_footer {
+    width: 100%;
+    height: 2;
+    text-align: center;
+    content-align: center middle;
+    color: #b6bfdc;
+    margin-top: 0;
+    border-top: solid #4b5165;
+}
+
+#filter_container {
+    width: 60;
+    height: auto;
+    background: #181a2a;
+    border: heavy #7aa2f7;
+    padding: 1 2;
+}
+
+#filter_title {
+    width: 100%;
+    height: 2;
+    text-align: center;
+    text-style: bold;
+    color: #7aa2f7;
+    content-align: center middle;
+    margin-bottom: 1;
+}
+
+#filter_input {
+    width: 100%;
+    margin: 1 0;
+}
+
+#filter_footer {
+    width: 100%;
+    height: 2;
+    text-align: center;
+    content-align: center middle;
+    color: #b6bfdc;
+    margin-top: 1;
+}
+"""

auditui/downloads/__init__.py

@@ -0,0 +1,5 @@
+"""Download and cache of Audible AAX files."""
+
+from .manager import DownloadManager
+
+__all__ = ["DownloadManager"]

auditui/downloads/manager.py

@@ -0,0 +1,344 @@
+"""Obtains AAX files from Audible (cache or download) and provides activation bytes."""
+
+import re
+import unicodedata
+from pathlib import Path
+from typing import Any
+from urllib.parse import urlparse
+
+import audible
+import httpx
+from audible.activation_bytes import get_activation_bytes
+
+from ..constants import (
+    CACHE_DIR,
+    DEFAULT_CHUNK_SIZE,
+    DEFAULT_CODEC,
+    DOWNLOAD_URL,
+    MIN_FILE_SIZE,
+)
+from ..types import StatusCallback
+
+
+class DownloadManager:
+    """Obtains AAX files from Audible (cache or download) and provides activation bytes."""
+
+    def __init__(
+        self,
+        auth: audible.Authenticator,
+        client: audible.Client,
+        cache_dir: Path = CACHE_DIR,
+        chunk_size: int = DEFAULT_CHUNK_SIZE,
+    ) -> None:
+        self.auth = auth
+        self.client: Any = client
+        self.cache_dir = cache_dir
+        self.cache_dir.mkdir(parents=True, exist_ok=True)
+        self.chunk_size = chunk_size
+        self._http_client = httpx.Client(auth=auth, timeout=30.0, follow_redirects=True)
+        self._download_client = httpx.Client(
+            timeout=httpx.Timeout(connect=30.0, read=None, write=30.0, pool=30.0),
+            follow_redirects=True,
+        )
+
+    def get_or_download(
+        self,
+        asin: str,
+        notify: StatusCallback | None = None,
+        preferred_title: str | None = None,
+        preferred_author: str | None = None,
+    ) -> Path | None:
+        """Return local path to AAX file; download and cache if not present."""
+        filename_stems = self._get_filename_stems_from_asin(
+            asin,
+            preferred_title=preferred_title,
+            preferred_author=preferred_author,
+        )
+        local_path = self.cache_dir / f"{filename_stems[0]}.aax"
+        cached_path = self._find_cached_path(filename_stems)
+        if cached_path:
+            if notify:
+                notify(f"Using cached file: {cached_path.name}")
+            return cached_path
+
+        if notify:
+            notify(f"Downloading to {local_path.name}...")
+
+        if not self._download_to_valid_file(asin, local_path, notify):
+            return None
+
+        return local_path
+
+    def _download_to_valid_file(
+        self,
+        asin: str,
+        local_path: Path,
+        notify: StatusCallback | None = None,
+    ) -> bool:
+        """Download with one retry and ensure resulting file has a valid size."""
+        for attempt in range(1, 3):
+            if not self._attempt_download(asin, local_path, notify):
+                return False
+            if local_path.exists() and local_path.stat().st_size >= MIN_FILE_SIZE:
+                return True
+
+            downloaded_size = local_path.stat().st_size if local_path.exists() else 0
+            if notify and attempt == 1:
+                notify(
+                    f"Downloaded file too small ({downloaded_size} bytes), retrying..."
+                )
+            if notify and attempt == 2:
+                notify(
+                    f"Download failed: file too small ({downloaded_size} bytes, expected >= {MIN_FILE_SIZE})"
+                )
+            self._cleanup_partial_file(local_path)
+
+        return False
+
+    def _attempt_download(
+        self,
+        asin: str,
+        local_path: Path,
+        notify: StatusCallback | None = None,
+    ) -> bool:
+        """Perform one download attempt including link lookup and URL validation."""
+        dl_link = self._get_download_link(asin, notify=notify)
+        if not dl_link:
+            if notify:
+                notify("Failed to get download link")
+            return False
+
+        if not self._validate_download_url(dl_link):
+            if notify:
+                notify("Invalid download URL")
+            return False
+
+        if not self._download_file(dl_link, local_path, notify):
+            if notify:
+                notify("Download failed")
+            return False
+
+        return True
+
+    def get_activation_bytes(self) -> str | None:
+        """Return activation bytes as hex string for ffplay/ffmpeg."""
+        try:
+            activation_bytes = get_activation_bytes(self.auth)
+            if isinstance(activation_bytes, bytes):
+                return activation_bytes.hex()
+            return str(activation_bytes)
+        except (OSError, ValueError, KeyError, AttributeError):
+            return None
+
+    def get_cached_path(self, asin: str) -> Path | None:
+        """Return path to cached AAX file if it exists and is valid size."""
+        return self._find_cached_path(self._get_filename_stems_from_asin(asin))
+
+    def is_cached(self, asin: str) -> bool:
+        """Return True if the title is present in cache with valid size."""
+        return self.get_cached_path(asin) is not None
+
+    def remove_cached(self, asin: str, notify: StatusCallback | None = None) -> bool:
+        """Delete the cached AAX file for the given ASIN. Returns True on success."""
+        cached_path = self.get_cached_path(asin)
+        if not cached_path:
+            if notify:
+                notify("Book is not cached")
+            return False
+
+        try:
+            cached_path.unlink()
+            if notify:
+                notify(f"Removed from cache: {cached_path.name}")
+            return True
+        except OSError as exc:
+            if notify:
+                notify(f"Failed to remove cache: {exc}")
+            return False
+
+    def _validate_download_url(self, url: str) -> bool:
+        """Validate that the URL is a valid HTTP/HTTPS URL."""
+        try:
+            parsed = urlparse(url)
+            return parsed.scheme in ("http", "https") and bool(parsed.netloc)
+        except (ValueError, AttributeError):
+            return False
+
+    def _sanitize_filename(self, filename: str) -> str:
+        """Normalize a filename segment with ASCII letters, digits, and dashes."""
+        ascii_text = unicodedata.normalize("NFKD", filename)
+        ascii_text = ascii_text.encode("ascii", "ignore").decode("ascii")
+        ascii_text = re.sub(r"[’'`]+", "", ascii_text)
+        ascii_text = re.sub(r"[^A-Za-z0-9]+", "-", ascii_text)
+        ascii_text = re.sub(r"-+", "-", ascii_text)
+        ascii_text = ascii_text.strip("-._")
+        return ascii_text or "Unknown"
+
+    def _find_cached_path(self, filename_stems: list[str]) -> Path | None:
+        """Return the first valid cached path matching any candidate filename stem."""
+        for filename_stem in filename_stems:
+            local_path = self.cache_dir / f"{filename_stem}.aax"
+            if local_path.exists() and local_path.stat().st_size >= MIN_FILE_SIZE:
+                return local_path
+        return None
+
+    def _get_filename_stems_from_asin(
+        self,
+        asin: str,
+        preferred_title: str | None = None,
+        preferred_author: str | None = None,
+    ) -> list[str]:
+        """Build preferred and fallback cache filename stems for an ASIN."""
+        if preferred_title:
+            preferred_combined = (
+                f"{self._sanitize_filename(preferred_author or 'Unknown Author')}_"
+                f"{self._sanitize_filename(preferred_title)}"
+            )
+            preferred_legacy = self._sanitize_filename(preferred_title)
+            fallback_asin = self._sanitize_filename(asin)
+            return list(
+                dict.fromkeys([preferred_combined, preferred_legacy, fallback_asin])
+            )
+
+        try:
+            product_info = self.client.get(
+                path=f"1.0/catalog/products/{asin}",
+                **{"response_groups": "contributors,product_desc,product_attrs"},
+            )
+            product = product_info.get("product", {})
+            title = product.get("title") or "Unknown Title"
+            author = self._get_primary_author(product)
+            combined = (
+                f"{self._sanitize_filename(author)}_{self._sanitize_filename(title)}"
+            )
+            legacy_title = self._sanitize_filename(title)
+            fallback_asin = self._sanitize_filename(asin)
+            return list(dict.fromkeys([combined, legacy_title, fallback_asin]))
+        except (OSError, ValueError, KeyError, AttributeError):
+            return [self._sanitize_filename(asin)]
+
+    def _get_primary_author(self, product: dict) -> str:
+        """Extract a primary author name from product metadata."""
+        contributors = product.get("authors") or product.get("contributors") or []
+        for contributor in contributors:
+            if not isinstance(contributor, dict):
+                continue
+            name = contributor.get("name")
+            if isinstance(name, str) and name.strip():
+                return name
+        return "Unknown Author"
+
+    def _get_download_link(
+        self,
+        asin: str,
+        codec: str = DEFAULT_CODEC,
+        notify: StatusCallback | None = None,
+    ) -> str | None:
+        """Obtain CDN download URL for the given ASIN and codec."""
+        if self.auth.adp_token is None:
+            if notify:
+                notify("Missing ADP token (not authenticated?)")
+            return None
+
+        try:
+            params = {
+                "type": "AUDI",
+                "currentTransportMethod": "WIFI",
+                "key": asin,
+                "codec": codec,
+            }
+            response = self._http_client.get(
+                url=DOWNLOAD_URL,
+                params=params,
+            )
+            response.raise_for_status()
+
+            link = response.headers.get("Location")
+            if not link:
+                link = str(response.url)
+
+            locale = getattr(self.auth, "locale", None)
+            tld = getattr(locale, "domain", "com")
+            return link.replace("cds.audible.com", f"cds.audible.{tld}")
+
+        except httpx.HTTPError as exc:
+            if notify:
+                notify(f"Download-link request failed: {exc!s}")
+            return None
+        except (OSError, ValueError, KeyError, AttributeError) as exc:
+            if notify:
+                notify(f"Download-link error: {exc!s}")
+            return None
+
+    def _download_file(
+        self, url: str, dest_path: Path, notify: StatusCallback | None = None
+    ) -> Path | None:
+        """Stream download from URL to dest_path; reports progress via notify."""
+        try:
+            with self._download_client.stream("GET", url) as response:
+                response.raise_for_status()
+                total_size = int(response.headers.get("content-length", 0))
+                self._stream_to_file(response, dest_path, total_size, notify)
+
+            return dest_path
+        except httpx.HTTPStatusError as exc:
+            if notify:
+                notify(
+                    f"Download HTTP error: {exc.response.status_code} {exc.response.reason_phrase}"
+                )
+            self._cleanup_partial_file(dest_path)
+            return None
+        except httpx.HTTPError as exc:
+            if notify:
+                notify(f"Download network error: {exc!s}")
+            self._cleanup_partial_file(dest_path)
+            return None
+        except (OSError, ValueError, KeyError) as exc:
+            if notify:
+                notify(f"Download error: {exc!s}")
+            self._cleanup_partial_file(dest_path)
+            return None
+
+    def _stream_to_file(
+        self,
+        response: httpx.Response,
+        dest_path: Path,
+        total_size: int,
+        notify: StatusCallback | None = None,
+    ) -> None:
+        """Write streamed response bytes to disk and emit progress messages."""
+        downloaded = 0
+        with open(dest_path, "wb") as file_handle:
+            for chunk in response.iter_bytes(chunk_size=self.chunk_size):
+                file_handle.write(chunk)
+                downloaded += len(chunk)
+                self._notify_download_progress(downloaded, total_size, notify)
+
+    def _notify_download_progress(
+        self,
+        downloaded: int,
+        total_size: int,
+        notify: StatusCallback | None = None,
+    ) -> None:
+        """Emit a formatted progress message when total size is known."""
+        if total_size <= 0 or not notify:
+            return
+        percent = (downloaded / total_size) * 100
+        downloaded_mb = downloaded / (1024 * 1024)
+        total_mb = total_size / (1024 * 1024)
+        notify(f"Downloading: {percent:.1f}% ({downloaded_mb:.1f}/{total_mb:.1f} MB)")
+
+    def _cleanup_partial_file(self, dest_path: Path) -> None:
+        """Remove undersized partial download files after transfer failures."""
+        try:
+            if dest_path.exists() and dest_path.stat().st_size < MIN_FILE_SIZE:
+                dest_path.unlink()
+        except OSError:
+            return
+
+    def close(self) -> None:
+        """Close internal HTTP clients. Safe to call multiple times."""
+        if hasattr(self, "_http_client"):
+            self._http_client.close()
+        if hasattr(self, "_download_client"):
+            self._download_client.close()

auditui/library/__init__.py

@@ -0,0 +1,22 @@
+"""Fetching, formatting, and filtering of the user's Audible library."""
+
+from .client import LibraryClient
+from .search import build_search_text, filter_items
+from .table import (
+    create_progress_sort_key,
+    create_title_sort_key,
+    filter_unfinished_items,
+    format_item_as_row,
+    truncate_author_name,
+)
+
+__all__ = [
+    "LibraryClient",
+    "build_search_text",
+    "filter_items",
+    "create_progress_sort_key",
+    "create_title_sort_key",
+    "filter_unfinished_items",
+    "format_item_as_row",
+    "truncate_author_name",
+]

auditui/library/client.py

@@ -0,0 +1,25 @@
+"""Client facade for Audible library fetch, extraction, and progress updates."""
+
+from __future__ import annotations
+
+import audible
+
+from .client_extract import LibraryClientExtractMixin
+from .client_fetch import LibraryClientFetchMixin
+from .client_finished import LibraryClientFinishedMixin
+from .client_format import LibraryClientFormatMixin
+from .client_positions import LibraryClientPositionsMixin
+
+
+class LibraryClient(
+    LibraryClientFetchMixin,
+    LibraryClientExtractMixin,
+    LibraryClientPositionsMixin,
+    LibraryClientFinishedMixin,
+    LibraryClientFormatMixin,
+):
+    """Audible library client composed from focused behavior mixins."""
+
+    def __init__(self, client: audible.Client) -> None:
+        """Store authenticated Audible client used by all operations."""
+        self.client = client

auditui/library/client_extract.py

@@ -0,0 +1,84 @@
+"""Metadata extraction helpers for library items."""
+
+from __future__ import annotations
+
+from ..types import LibraryItem
+
+
+class LibraryClientExtractMixin:
+    """Extracts display and status fields from library items."""
+
+    def extract_title(self, item: LibraryItem) -> str:
+        """Return the book title from a library item."""
+        product = item.get("product", {})
+        return (
+            product.get("title")
+            or item.get("title")
+            or product.get("asin", "Unknown Title")
+        )
+
+    def extract_authors(self, item: LibraryItem) -> str:
+        """Return comma-separated author names from a library item."""
+        product = item.get("product", {})
+        authors = product.get("authors") or product.get("contributors") or []
+        if not authors and "authors" in item:
+            authors = item.get("authors", [])
+        author_names = [
+            author.get("name", "") for author in authors if isinstance(author, dict)
+        ]
+        return ", ".join(author_names) or "Unknown"
+
+    def extract_runtime_minutes(self, item: LibraryItem) -> int | None:
+        """Return runtime in minutes if present."""
+        product = item.get("product", {})
+        runtime_fields = [
+            "runtime_length_min",
+            "runtime_length",
+            "vLength",
+            "length",
+            "duration",
+        ]
+
+        runtime = None
+        for field in runtime_fields:
+            runtime = product.get(field) or item.get(field)
+            if runtime is not None:
+                break
+
+        if runtime is None:
+            return None
+        if isinstance(runtime, dict):
+            return int(runtime.get("min", 0))
+        if isinstance(runtime, (int, float)):
+            return int(runtime)
+        return None
+
+    def extract_progress_info(self, item: LibraryItem) -> float | None:
+        """Return progress percentage (0-100) if present."""
+        percent_complete = item.get("percent_complete")
+        listening_status = item.get("listening_status", {})
+        if isinstance(listening_status, dict) and percent_complete is None:
+            percent_complete = listening_status.get("percent_complete")
+        return float(percent_complete) if percent_complete is not None else None
+
+    def extract_asin(self, item: LibraryItem) -> str | None:
+        """Return the ASIN for a library item."""
+        product = item.get("product", {})
+        return item.get("asin") or product.get("asin")
+
+    def is_finished(self, item: LibraryItem) -> bool:
+        """Return True if the item is marked or inferred as finished."""
+        is_finished_flag = item.get("is_finished")
+        percent_complete = item.get("percent_complete")
+        listening_status = item.get("listening_status")
+
+        if isinstance(listening_status, dict):
+            is_finished_flag = is_finished_flag or listening_status.get(
+                "is_finished", False
+            )
+            if percent_complete is None:
+                percent_complete = listening_status.get("percent_complete", 0)
+
+        return bool(is_finished_flag) or (
+            isinstance(percent_complete, (int, float)) and percent_complete >= 100
+        )

auditui/library/client_fetch.py

@@ -0,0 +1,165 @@
+"""Library page fetching helpers for the Audible API client."""
+
+from __future__ import annotations
+
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from typing import Any
+
+from ..types import LibraryItem, StatusCallback
+
+
+class LibraryClientFetchMixin:
+    """Fetches all library items from paginated Audible endpoints."""
+
+    client: Any
+
+    def fetch_all_items(
+        self, on_progress: StatusCallback | None = None
+    ) -> list[LibraryItem]:
+        """Fetch all library items from the API."""
+        response_groups = "contributors,product_attrs,product_desc,is_finished,listening_status,percent_complete"
+        return self._fetch_all_pages(response_groups, on_progress)
+
+    def _fetch_page(
+        self,
+        page: int,
+        page_size: int,
+        response_groups: str,
+    ) -> tuple[int, list[LibraryItem]]:
+        """Fetch one library page and return its index with items."""
+        library = self.client.get(
+            path="library",
+            num_results=page_size,
+            page=page,
+            response_groups=response_groups,
+        )
+        items = library.get("items", [])
+        return page, list(items)
+
+    def _fetch_all_pages(
+        self,
+        response_groups: str,
+        on_progress: StatusCallback | None = None,
+    ) -> list[LibraryItem]:
+        """Fetch all library pages using parallel requests after page one."""
+        library_response = None
+        page_size = 200
+
+        for attempt_size in [200, 100, 50]:
+            try:
+                library_response = self.client.get(
+                    path="library",
+                    num_results=attempt_size,
+                    page=1,
+                    response_groups=response_groups,
+                )
+                page_size = attempt_size
+                break
+            except Exception:
+                continue
+
+        if not library_response:
+            return []
+
+        first_page_items = library_response.get("items", [])
+        if not first_page_items:
+            return []
+
+        all_items: list[LibraryItem] = list(first_page_items)
+        if on_progress:
+            on_progress(f"Fetched page 1 ({len(first_page_items)} items)...")
+
+        if len(first_page_items) < page_size:
+            return all_items
+
+        estimated_pages = self._estimate_total_pages(library_response, page_size)
+        page_results = self._fetch_remaining_pages(
+            response_groups=response_groups,
+            page_size=page_size,
+            estimated_pages=estimated_pages,
+            initial_total=len(first_page_items),
+            on_progress=on_progress,
+        )
+
+        for page_num in sorted(page_results.keys()):
+            all_items.extend(page_results[page_num])
+
+        return all_items
+
+    def _estimate_total_pages(self, library_response: dict, page_size: int) -> int:
+        """Estimate total pages from API metadata with a conservative cap."""
+        total_items_estimate = library_response.get(
+            "total_results"
+        ) or library_response.get("total")
+        if not total_items_estimate:
+            return 500
+        estimated_pages = (total_items_estimate + page_size - 1) // page_size
+        return min(estimated_pages, 1000)
+
+    def _fetch_remaining_pages(
+        self,
+        response_groups: str,
+        page_size: int,
+        estimated_pages: int,
+        initial_total: int,
+        on_progress: StatusCallback | None = None,
+    ) -> dict[int, list[LibraryItem]]:
+        """Fetch pages 2..N with bounded in-flight requests for faster startup."""
+        page_results: dict[int, list[LibraryItem]] = {}
+        max_workers = min(16, max(1, estimated_pages - 1))
+        next_page_to_submit = 2
+        stop_page = estimated_pages + 1
+        completed_count = 0
+        total_items = initial_total
+
+        with ThreadPoolExecutor(max_workers=max_workers) as executor:
+            future_to_page: dict = {}
+
+            while (
+                next_page_to_submit <= estimated_pages
+                and next_page_to_submit < stop_page
+                and len(future_to_page) < max_workers
+            ):
+                future = executor.submit(
+                    self._fetch_page,
+                    next_page_to_submit,
+                    page_size,
+                    response_groups,
+                )
+                future_to_page[future] = next_page_to_submit
+                next_page_to_submit += 1
+
+            while future_to_page:
+                future = next(as_completed(future_to_page))
+                page_num = future_to_page.pop(future)
+                try:
+                    fetched_page, items = future.result()
+                except Exception:
+                    continue
+
+                if items:
+                    page_results[fetched_page] = items
+                    total_items += len(items)
+                    completed_count += 1
+                    if on_progress and completed_count % 20 == 0:
+                        on_progress(
+                            f"Fetched {completed_count} pages ({total_items} items)..."
+                        )
+                if len(items) < page_size:
+                    stop_page = min(stop_page, fetched_page)
+
+                while (
+                    next_page_to_submit <= estimated_pages
+                    and next_page_to_submit < stop_page
+                    and len(future_to_page) < max_workers
+                ):
+                    next_future = executor.submit(
+                        self._fetch_page,
+                        next_page_to_submit,
+                        page_size,
+                        response_groups,
+                    )
+                    future_to_page[next_future] = next_page_to_submit
+                    next_page_to_submit += 1
+
+        return page_results

auditui/library/client_finished.py

@@ -0,0 +1,70 @@
+"""Helpers for marking content as finished through Audible APIs."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from ..types import LibraryItem
+
+
+class LibraryClientFinishedMixin:
+    """Marks titles as finished and mutates in-memory item state."""
+
+    client: Any
+
+    def mark_as_finished(self, asin: str, item: LibraryItem | None = None) -> bool:
+        """Mark a book as finished on Audible and optionally update item state."""
+        total_ms = self._get_runtime_ms(asin, item)
+        if not total_ms:
+            return False
+
+        acr = self._get_acr(asin)
+        if not acr:
+            return False
+
+        try:
+            self.client.put(
+                path=f"1.0/lastpositions/{asin}",
+                body={"asin": asin, "acr": acr, "position_ms": total_ms},
+            )
+            if item:
+                item["is_finished"] = True
+                listening_status = item.get("listening_status", {})
+                if isinstance(listening_status, dict):
+                    listening_status["is_finished"] = True
+            return True
+        except Exception:
+            return False
+
+    def _get_runtime_ms(self, asin: str, item: LibraryItem | None = None) -> int | None:
+        """Return total runtime in milliseconds from item or metadata endpoint."""
+        if item:
+            extract_runtime_minutes = getattr(self, "extract_runtime_minutes")
+            runtime_min = extract_runtime_minutes(item)
+            if runtime_min:
+                return runtime_min * 60 * 1000
+
+        try:
+            response = self.client.get(
+                path=f"1.0/content/{asin}/metadata",
+                response_groups="chapter_info",
+            )
+            chapter_info = response.get("content_metadata", {}).get("chapter_info", {})
+            return chapter_info.get("runtime_length_ms")
+        except Exception:
+            return None
+
+    def _get_acr(self, asin: str) -> str | None:
+        """Fetch the ACR token required by finish/update write operations."""
+        try:
+            response = self.client.post(
+                path=f"1.0/content/{asin}/licenserequest",
+                body={
+                    "response_groups": "content_reference",
+                    "consumption_type": "Download",
+                    "drm_type": "Adrm",
+                },
+            )
+            return response.get("content_license", {}).get("acr")
+        except Exception:
+            return None

auditui/library/client_format.py

@@ -0,0 +1,37 @@
+"""Formatting helpers exposed by the library client."""
+
+from __future__ import annotations
+
+
+class LibraryClientFormatMixin:
+    """Formats durations and timestamps for display usage."""
+
+    @staticmethod
+    def format_duration(
+        value: int | None,
+        unit: str = "minutes",
+        default_none: str | None = None,
+    ) -> str | None:
+        """Format duration values as compact hour-minute strings."""
+        if value is None or value <= 0:
+            return default_none
+
+        total_minutes = int(value)
+        if unit == "seconds":
+            total_minutes //= 60
+
+        hours, minutes = divmod(total_minutes, 60)
+        if hours > 0:
+            return f"{hours}h{minutes:02d}" if minutes else f"{hours}h"
+        return f"{minutes}m"
+
+    @staticmethod
+    def format_time(seconds: float) -> str:
+        """Format seconds as HH:MM:SS or MM:SS for display."""
+        total_seconds = int(seconds)
+        hours = total_seconds // 3600
+        minutes = (total_seconds % 3600) // 60
+        secs = total_seconds % 60
+        if hours > 0:
+            return f"{hours:02d}:{minutes:02d}:{secs:02d}"
+        return f"{minutes:02d}:{secs:02d}"

auditui/library/client_positions.py

@@ -0,0 +1,85 @@
+"""Playback position read and write helpers for library content."""
+
+from __future__ import annotations
+
+from typing import Any
+
+
+class LibraryClientPositionsMixin:
+    """Handles last-position retrieval and persistence."""
+
+    client: Any
+
+    def get_last_position(self, asin: str) -> float | None:
+        """Get the last playback position for a book in seconds."""
+        try:
+            response = self.client.get(
+                path="1.0/annotations/lastpositions",
+                asins=asin,
+            )
+            annotations = response.get("asin_last_position_heard_annots", [])
+            for annotation in annotations:
+                if annotation.get("asin") != asin:
+                    continue
+                last_position_heard = annotation.get("last_position_heard", {})
+                if not isinstance(last_position_heard, dict):
+                    continue
+                if last_position_heard.get("status") == "DoesNotExist":
+                    return None
+                position_ms = last_position_heard.get("position_ms")
+                if position_ms is not None:
+                    return float(position_ms) / 1000.0
+            return None
+        except (OSError, ValueError, KeyError):
+            return None
+
+    def _get_content_reference(self, asin: str) -> dict | None:
+        """Fetch content reference payload used by position update calls."""
+        try:
+            response = self.client.get(
+                path=f"1.0/content/{asin}/metadata",
+                response_groups="content_reference",
+            )
+            content_metadata = response.get("content_metadata", {})
+            content_reference = content_metadata.get("content_reference", {})
+            if isinstance(content_reference, dict):
+                return content_reference
+            return None
+        except (OSError, ValueError, KeyError):
+            return None
+
+    def _update_position(self, asin: str, position_seconds: float) -> bool:
+        """Persist playback position to the API and return success state."""
+        if position_seconds < 0:
+            return False
+
+        content_ref = self._get_content_reference(asin)
+        if not content_ref:
+            return False
+
+        acr = content_ref.get("acr")
+        if not acr:
+            return False
+
+        body = {
+            "acr": acr,
+            "asin": asin,
+            "position_ms": int(position_seconds * 1000),
+        }
+        if version := content_ref.get("version"):
+            body["version"] = version
+
+        try:
+            self.client.put(
+                path=f"1.0/lastpositions/{asin}",
+                body=body,
+            )
+            return True
+        except (OSError, ValueError, KeyError):
+            return False
+
+    def save_last_position(self, asin: str, position_seconds: float) -> bool:
+        """Save playback position to Audible and return success state."""
+        if position_seconds <= 0:
+            return False
+        return self._update_position(asin, position_seconds)

auditui/library/search.py

@@ -0,0 +1,36 @@
+"""Text search over library items for the filter feature."""
+
+from __future__ import annotations
+
+from typing import Callable
+
+from ..types import LibraryItem
+
+from .client import LibraryClient
+
+
+def build_search_text(item: LibraryItem, library_client: LibraryClient | None) -> str:
+    """Build a single lowercase string from title and authors for matching."""
+    if library_client:
+        title = library_client.extract_title(item)
+        authors = library_client.extract_authors(item)
+    else:
+        title = item.get("title", "")
+        authors = ", ".join(
+            a.get("name", "")
+            for a in item.get("authors", [])
+            if isinstance(a, dict) and a.get("name")
+        )
+    return f"{title} {authors}".lower()
+
+
+def filter_items(
+    items: list[LibraryItem],
+    filter_text: str,
+    get_search_text: Callable[[LibraryItem], str],
+) -> list[LibraryItem]:
+    """Return items whose search text contains filter_text (case-insensitive)."""
+    if not filter_text:
+        return items
+    filter_lower = filter_text.lower()
+    return [item for item in items if filter_lower in get_search_text(item)]

auditui/library/table.py

@@ -0,0 +1,84 @@
+"""Formatting and sorting of library items for the main table."""
+
+import unicodedata
+from typing import TYPE_CHECKING, Callable
+
+from ..constants import (
+    AUTHOR_NAME_DISPLAY_LENGTH,
+    AUTHOR_NAME_MAX_LENGTH,
+    PROGRESS_COLUMN_INDEX,
+)
+from ..types import LibraryItem
+
+if TYPE_CHECKING:
+    from ..downloads import DownloadManager
+
+
+def create_title_sort_key(reverse: bool = False) -> tuple[Callable, bool]:
+    """Return a (key_fn, reverse) pair for DataTable sort by title column."""
+    def title_key(row_values):
+        title_cell = row_values[0]
+        if isinstance(title_cell, str):
+            normalized = unicodedata.normalize('NFD', title_cell)
+            return normalized.encode('ascii', 'ignore').decode('ascii').lower()
+        return str(title_cell).lower()
+
+    return title_key, reverse
+
+
+def create_progress_sort_key(progress_column_index: int = PROGRESS_COLUMN_INDEX, reverse: bool = False) -> tuple[Callable, bool]:
+    """Return a (key_fn, reverse) pair for DataTable sort by progress column."""
+    def progress_key(row_values):
+        progress_cell = row_values[progress_column_index]
+        if isinstance(progress_cell, str):
+            try:
+                return float(progress_cell.rstrip("%"))
+            except (ValueError, AttributeError):
+                return 0.0
+        return 0.0
+
+    return progress_key, reverse
+
+
+def truncate_author_name(author_names: str) -> str:
+    """Truncate author string to display length with ellipsis if over max."""
+    if author_names and len(author_names) > AUTHOR_NAME_MAX_LENGTH:
+        return f"{author_names[:AUTHOR_NAME_DISPLAY_LENGTH]}..."
+    return author_names
+
+
+def format_item_as_row(item: LibraryItem, library_client, download_manager: "DownloadManager | None" = None) -> tuple[str, str, str, str, str]:
+    """Turn a library item into (title, author, runtime, progress, downloaded) for the table."""
+    title = library_client.extract_title(item)
+
+    author_names = library_client.extract_authors(item)
+    author_names = truncate_author_name(author_names)
+    author_display = author_names or "Unknown"
+
+    minutes = library_client.extract_runtime_minutes(item)
+    runtime_str = library_client.format_duration(
+        minutes, unit="minutes", default_none="Unknown length"
+    ) or "Unknown"
+
+    percent_complete = library_client.extract_progress_info(item)
+    progress_str = (
+        f"{percent_complete:.1f}%"
+        if percent_complete and percent_complete > 0
+        else "0%"
+    )
+
+    downloaded_str = ""
+    if download_manager:
+        asin = library_client.extract_asin(item)
+        if asin and download_manager.is_cached(asin):
+            downloaded_str = "✓"
+
+    return (title, author_display, runtime_str, progress_str, downloaded_str)
+
+
+def filter_unfinished_items(items: list[LibraryItem], library_client) -> list[LibraryItem]:
+    """Return only items that are not marked as finished."""
+    return [
+        item for item in items
+        if not library_client.is_finished(item)
+    ]

auditui/playback/__init__.py

@@ -0,0 +1,6 @@
+"""Playback control via ffplay and position sync with Audible."""
+
+from .controller import PlaybackController
+from .media_info import load_media_info
+
+__all__ = ["PlaybackController", "load_media_info"]

auditui/playback/chapters.py

@@ -0,0 +1,30 @@
+"""Chapter lookup by elapsed time."""
+
+
+def get_current_chapter(
+    elapsed: float,
+    chapters: list[dict],
+    total_duration: float | None,
+) -> tuple[str, float, float]:
+    """Return (title, elapsed_in_chapter, chapter_duration) for the chapter at elapsed time."""
+    if not chapters:
+        return ("Unknown Chapter", elapsed, total_duration or 0.0)
+    for chapter in chapters:
+        if chapter["start_time"] <= elapsed < chapter["end_time"]:
+            chapter_elapsed = elapsed - chapter["start_time"]
+            chapter_total = chapter["end_time"] - chapter["start_time"]
+            return (chapter["title"], chapter_elapsed, chapter_total)
+    last = chapters[-1]
+    chapter_elapsed = max(0.0, elapsed - last["start_time"])
+    chapter_total = last["end_time"] - last["start_time"]
+    return (last["title"], chapter_elapsed, chapter_total)
+
+
+def get_current_chapter_index(elapsed: float, chapters: list[dict]) -> int | None:
+    """Return the index of the chapter containing the given elapsed time."""
+    if not chapters:
+        return None
+    for idx, chapter in enumerate(chapters):
+        if chapter["start_time"] <= elapsed < chapter["end_time"]:
+            return idx
+    return len(chapters) - 1

auditui/playback/constants.py

@@ -0,0 +1,5 @@
+"""Speed limits and increment for playback."""
+
+MIN_SPEED = 0.5
+MAX_SPEED = 2.0
+SPEED_INCREMENT = 0.5

auditui/playback/controller.py

@@ -0,0 +1,14 @@
+"""Orchestrates ffplay process, position, chapters, seek, and speed; delegates to playback submodules."""
+
+from __future__ import annotations
+
+from ..library import LibraryClient
+from ..types import StatusCallback
+
+from .controller_seek_speed import ControllerSeekSpeedMixin
+from .controller_lifecycle import ControllerLifecycleMixin
+from .controller_state import ControllerStateMixin
+
+
+class PlaybackController(ControllerSeekSpeedMixin, ControllerLifecycleMixin, ControllerStateMixin):
+    """Controls ffplay: start/stop, pause/resume, seek, speed, and saving position to Audible."""

auditui/playback/controller_lifecycle.py

@@ -0,0 +1,200 @@
+"""Playback lifecycle: start, stop, pause, resume, prepare_and_start, restart at position."""
+
+from __future__ import annotations
+
+import signal
+import subprocess
+import time
+from pathlib import Path
+
+from ..downloads import DownloadManager
+from ..library import LibraryClient
+from ..types import StatusCallback
+
+from . import process as process_mod
+from .media_info import load_media_info
+
+from .controller_state import ControllerStateMixin
+
+
+class ControllerLifecycleMixin(ControllerStateMixin):
+    """Start/stop, pause/resume, and restart-at-position logic."""
+
+    def start(
+        self,
+        path: Path,
+        activation_hex: str | None = None,
+        status_callback: StatusCallback | None = None,
+        start_position: float = 0.0,
+        speed: float | None = None,
+    ) -> bool:
+        """Start ffplay for the given AAX path. Returns True if playback started."""
+        notify = status_callback or self.notify
+        if not process_mod.is_ffplay_available():
+            notify("ffplay not found. Please install ffmpeg")
+            return False
+        if self.playback_process is not None:
+            self.stop()
+        self.activation_hex = activation_hex
+        self.seek_offset = start_position
+        if speed is not None:
+            self.playback_speed = speed
+        cmd = process_mod.build_ffplay_cmd(
+            path, activation_hex, start_position, self.playback_speed
+        )
+        try:
+            proc, return_code = process_mod.run_ffplay(cmd)
+            if proc is None:
+                if (
+                    return_code == 0
+                    and start_position > 0
+                    and self.total_duration
+                    and start_position >= self.total_duration - 5
+                ):
+                    notify("Reached end of file")
+                    self._reset_state()
+                    return False
+                notify(f"Playback process exited immediately (code: {return_code})")
+                return False
+            self.playback_process = proc
+            self.is_playing = True
+            self.is_paused = False
+            self.current_file_path = path
+            self.playback_start_time = time.time()
+            self.paused_duration = 0.0
+            self.pause_start_time = None
+            duration, chs = load_media_info(path, activation_hex)
+            self.total_duration = duration
+            self.chapters = chs
+            notify(f"Playing: {path.name}")
+            return True
+        except (OSError, ValueError, subprocess.SubprocessError) as exc:
+            notify(f"Error starting playback: {exc}")
+            return False
+
+    def stop(self) -> None:
+        """Stop ffplay, save position to Audible, and reset state."""
+        if self.playback_process is None:
+            return
+        self._save_current_position()
+        try:
+            process_mod.terminate_process(self.playback_process)
+        finally:
+            self._reset_state()
+
+    def pause(self) -> None:
+        """Send SIGSTOP to ffplay and mark state as paused."""
+        if not self._validate_playback_state(require_paused=False):
+            return
+        self.pause_start_time = time.time()
+        self._send_signal(signal.SIGSTOP, "Paused", "pause")
+
+    def resume(self) -> None:
+        """Send SIGCONT to ffplay and clear paused state."""
+        if not self._validate_playback_state(require_paused=True):
+            return
+        if self.pause_start_time is not None:
+            self.paused_duration += time.time() - self.pause_start_time
+            self.pause_start_time = None
+        self._send_signal(signal.SIGCONT, "Playing", "resume")
+
+    def check_status(self) -> str | None:
+        """If the process has exited, return a status message and reset state; else None."""
+        if self.playback_process is None:
+            return None
+        return_code = self.playback_process.poll()
+        if return_code is None:
+            return None
+        finished_file = self.current_file_path
+        self._reset_state()
+        if finished_file:
+            if return_code == 0:
+                return f"Finished: {finished_file.name}"
+            return f"Playback ended unexpectedly (code: {return_code}): {finished_file.name}"
+        return "Playback finished"
+
+    def prepare_and_start(
+        self,
+        download_manager: DownloadManager,
+        asin: str,
+        status_callback: StatusCallback | None = None,
+        preferred_title: str | None = None,
+        preferred_author: str | None = None,
+    ) -> bool:
+        """Download AAX if needed, get activation bytes, then start playback. Returns True on success."""
+        notify = status_callback or self.notify
+        if not download_manager:
+            notify("Could not download file")
+            return False
+        notify("Preparing playback...")
+        local_path = download_manager.get_or_download(
+            asin,
+            notify,
+            preferred_title=preferred_title,
+            preferred_author=preferred_author,
+        )
+        if not local_path:
+            notify("Could not download file")
+            return False
+        notify("Getting activation bytes...")
+        activation_hex = download_manager.get_activation_bytes()
+        if not activation_hex:
+            notify("Failed to get activation bytes")
+            return False
+        start_position = 0.0
+        if self.library_client:
+            try:
+                last = self.library_client.get_last_position(asin)
+                if last is not None and last > 0:
+                    start_position = last
+                    notify(f"Resuming from {LibraryClient.format_time(start_position)}")
+            except (OSError, ValueError, KeyError):
+                pass
+        notify(f"Starting playback of {local_path.name}...")
+        self.current_asin = asin
+        self.last_save_time = time.time()
+        return self.start(
+            local_path, activation_hex, notify, start_position, self.playback_speed
+        )
+
+    def toggle_playback(self) -> bool:
+        """Toggle between pause and resume. Returns True if an action was performed."""
+        if not self.is_playing:
+            return False
+        if not self.is_alive():
+            self.stop()
+            self.notify("Playback has ended")
+            return False
+        if self.is_paused:
+            self.resume()
+        else:
+            self.pause()
+        return True
+
+    def _restart_at_position(
+        self,
+        new_position: float,
+        new_speed: float | None = None,
+        message: str | None = None,
+    ) -> bool:
+        """Stop current process and start again at new_position; optionally set speed and notify."""
+        if not self.is_playing or not self.current_file_path:
+            return False
+        was_paused = self.is_paused
+        saved = self._get_saved_state()
+        speed = new_speed if new_speed is not None else saved["speed"]
+        self._stop_process()
+        time.sleep(0.2)
+        if self.start(
+            saved["file_path"], saved["activation"], self.notify, new_position, speed
+        ):
+            self.current_asin = saved["asin"]
+            self.total_duration = saved["duration"]
+            self.chapters = saved["chapters"]
+            if was_paused:
+                time.sleep(0.3)
+                self.pause()
+            if message:
+                self.notify(message)
+            return True
+        return False

auditui/playback/controller_seek_speed.py

@@ -0,0 +1,127 @@
+"""Seek, chapter, position save, and playback speed for the controller."""
+
+from __future__ import annotations
+
+import time
+
+from . import chapters as chapters_mod
+from . import seek as seek_mod
+from .constants import MIN_SPEED, MAX_SPEED, SPEED_INCREMENT
+
+from .controller_lifecycle import ControllerLifecycleMixin
+
+
+class ControllerSeekSpeedMixin(ControllerLifecycleMixin):
+    """Seek, chapter navigation, position persistence, and speed control."""
+
+    def _seek(self, seconds: float, direction: str) -> bool:
+        """Seek forward or backward by seconds via restart at new position. Returns True if done."""
+        elapsed = self._get_current_elapsed()
+        current = self.seek_offset + elapsed
+        result = seek_mod.compute_seek_target(
+            current, self.total_duration, seconds, direction
+        )
+        if result is None:
+            self.notify("Already at end of file")
+            return False
+        new_position, message = result
+        return self._restart_at_position(new_position, message=message)
+
+    def seek_forward(self, seconds: float = 30.0) -> bool:
+        """Seek forward by the given seconds. Returns True if seek was performed."""
+        return self._seek(seconds, "forward")
+
+    def seek_backward(self, seconds: float = 30.0) -> bool:
+        """Seek backward by the given seconds. Returns True if seek was performed."""
+        return self._seek(seconds, "backward")
+
+    def get_current_progress(self) -> tuple[str, float, float] | None:
+        """Return (chapter_title, chapter_elapsed, chapter_total) for progress display, or None."""
+        if not self.is_playing or self.playback_start_time is None:
+            return None
+        elapsed = self._get_current_elapsed()
+        total_elapsed = self.seek_offset + elapsed
+        return chapters_mod.get_current_chapter(
+            total_elapsed, self.chapters, self.total_duration
+        )
+
+    def seek_to_chapter(self, direction: str) -> bool:
+        """Seek to the next or previous chapter. direction is 'next' or 'previous'. Returns True if done."""
+        if not self.is_playing or not self.current_file_path:
+            return False
+        if not self.chapters:
+            self.notify("No chapter information available")
+            return False
+        elapsed = self._get_current_elapsed()
+        current_total = self.seek_offset + elapsed
+        idx = chapters_mod.get_current_chapter_index(
+            current_total, self.chapters)
+        if idx is None:
+            self.notify("Could not determine current chapter")
+            return False
+        if direction == "next":
+            if idx >= len(self.chapters) - 1:
+                self.notify("Already at last chapter")
+                return False
+            target = self.chapters[idx + 1]
+            new_position = target["start_time"]
+            message = f"Next chapter: {target['title']}"
+        else:
+            if idx <= 0:
+                self.notify("Already at first chapter")
+                return False
+            target = self.chapters[idx - 1]
+            new_position = target["start_time"]
+            message = f"Previous chapter: {target['title']}"
+        return self._restart_at_position(new_position, message=message)
+
+    def seek_to_next_chapter(self) -> bool:
+        """Seek to the next chapter. Returns True if seek was performed."""
+        return self.seek_to_chapter("next")
+
+    def seek_to_previous_chapter(self) -> bool:
+        """Seek to the previous chapter. Returns True if seek was performed."""
+        return self.seek_to_chapter("previous")
+
+    def _save_current_position(self) -> None:
+        """Persist current position to Audible via library_client."""
+        if not (self.library_client and self.current_asin and self.is_playing):
+            return
+        if self.playback_start_time is None:
+            return
+        current_position = self.seek_offset + self._get_current_elapsed()
+        if current_position <= 0:
+            return
+        try:
+            self.library_client.save_last_position(
+                self.current_asin, current_position)
+        except (OSError, ValueError, KeyError):
+            pass
+
+    def update_position_if_needed(self) -> None:
+        """Save position to Audible if the save interval has elapsed since last save."""
+        if not (self.is_playing and self.library_client and self.current_asin):
+            return
+        current_time = time.time()
+        if current_time - self.last_save_time >= self.position_save_interval:
+            self._save_current_position()
+            self.last_save_time = current_time
+
+    def _change_speed(self, delta: float) -> bool:
+        """Change speed by delta (clamped to MIN/MAX). Restarts playback. Returns True if changed."""
+        new_speed = max(MIN_SPEED, min(MAX_SPEED, self.playback_speed + delta))
+        if new_speed == self.playback_speed:
+            return False
+        elapsed = self._get_current_elapsed()
+        current_total = self.seek_offset + elapsed
+        return self._restart_at_position(
+            current_total, new_speed, f"Speed: {new_speed:.2f}x"
+        )
+
+    def increase_speed(self) -> bool:
+        """Increase playback speed. Returns True if speed was changed."""
+        return self._change_speed(SPEED_INCREMENT)
+
+    def decrease_speed(self) -> bool:
+        """Decrease playback speed. Returns True if speed was changed."""
+        return self._change_speed(-SPEED_INCREMENT)

auditui/playback/controller_state.py

@@ -0,0 +1,124 @@
+"""Playback state: init, reset, elapsed time, process validation and signals."""
+
+from __future__ import annotations
+
+import signal
+import time
+from pathlib import Path
+
+from ..library import LibraryClient
+from ..types import StatusCallback
+
+from . import elapsed as elapsed_mod
+from . import process as process_mod
+
+
+class ControllerStateMixin:
+    """State attributes and helpers for process/signal handling."""
+
+    def __init__(self, notify: StatusCallback, library_client: LibraryClient | None = None) -> None:
+        self.notify = notify
+        self.library_client = library_client
+        self.playback_process = None
+        self.is_playing = False
+        self.is_paused = False
+        self.current_file_path: Path | None = None
+        self.current_asin: str | None = None
+        self.playback_start_time: float | None = None
+        self.paused_duration: float = 0.0
+        self.pause_start_time: float | None = None
+        self.total_duration: float | None = None
+        self.chapters: list[dict] = []
+        self.seek_offset: float = 0.0
+        self.activation_hex: str | None = None
+        self.last_save_time: float = 0.0
+        self.position_save_interval: float = 30.0
+        self.playback_speed: float = 1.0
+
+    def _reset_state(self) -> None:
+        """Clear playing/paused state and references to current file/asin."""
+        self.playback_process = None
+        self.is_playing = False
+        self.is_paused = False
+        self.current_file_path = None
+        self.current_asin = None
+        self.playback_start_time = None
+        self.paused_duration = 0.0
+        self.pause_start_time = None
+        self.total_duration = None
+        self.chapters = []
+        self.seek_offset = 0.0
+        self.activation_hex = None
+        self.last_save_time = 0.0
+        self.playback_speed = 1.0
+
+    def _get_saved_state(self) -> dict:
+        """Return a snapshot of path, asin, activation, duration, chapters, speed for restart."""
+        return {
+            "file_path": self.current_file_path,
+            "asin": self.current_asin,
+            "activation": self.activation_hex,
+            "duration": self.total_duration,
+            "chapters": self.chapters.copy(),
+            "speed": self.playback_speed,
+        }
+
+    def _get_current_elapsed(self) -> float:
+        """Return elapsed seconds since start, accounting for pauses."""
+        if self.pause_start_time is not None and not self.is_paused:
+            self.paused_duration += time.time() - self.pause_start_time
+            self.pause_start_time = None
+        return elapsed_mod.get_elapsed(
+            self.playback_start_time,
+            self.pause_start_time,
+            self.paused_duration,
+            self.is_paused,
+        )
+
+    def _stop_process(self) -> None:
+        """Terminate the process and clear playing state without saving position."""
+        process_mod.terminate_process(self.playback_process)
+        self.playback_process = None
+        self.is_playing = False
+        self.is_paused = False
+        self.playback_start_time = None
+        self.paused_duration = 0.0
+        self.pause_start_time = None
+
+    def _validate_playback_state(self, require_paused: bool) -> bool:
+        """Return True if process is running and paused state matches require_paused."""
+        if not (self.playback_process and self.is_playing):
+            return False
+        if require_paused and not self.is_paused:
+            return False
+        if not require_paused and self.is_paused:
+            return False
+        if not self.is_alive():
+            self.stop()
+            self.notify("Playback process has ended")
+            return False
+        return True
+
+    def _send_signal(self, sig: signal.Signals, status_prefix: str, action: str) -> None:
+        """Send sig to the process, update is_paused, and notify."""
+        if self.playback_process is None:
+            return
+        try:
+            process_mod.send_signal(self.playback_process, sig)
+            self.is_paused = sig == signal.SIGSTOP
+            filename = self.current_file_path.name if self.current_file_path else None
+            msg = f"{status_prefix}: {filename}" if filename else status_prefix
+            self.notify(msg)
+        except ProcessLookupError:
+            self.stop()
+            self.notify("Process no longer exists")
+        except PermissionError:
+            self.notify(f"Permission denied: cannot {action} playback")
+        except (OSError, ValueError) as exc:
+            self.notify(f"Error {action}ing playback: {exc}")
+
+    def is_alive(self) -> bool:
+        """Return True if the ffplay process is still running."""
+        if self.playback_process is None:
+            return False
+        return self.playback_process.poll() is None

auditui/playback/elapsed.py

@@ -0,0 +1,23 @@
+"""Elapsed playback time accounting for pauses."""
+
+import time
+
+
+def get_elapsed(
+    playback_start_time: float | None,
+    pause_start_time: float | None,
+    paused_duration: float,
+    is_paused: bool,
+) -> float:
+    """Return elapsed seconds since start, accounting for pauses."""
+    if playback_start_time is None:
+        return 0.0
+    current_time = time.time()
+    if is_paused and pause_start_time is not None:
+        return (pause_start_time - playback_start_time) - paused_duration
+    if pause_start_time is not None:
+        paused_duration += current_time - pause_start_time
+    return max(
+        0.0,
+        (current_time - playback_start_time) - paused_duration,
+    )

auditui/playback/media_info.py

@@ -0,0 +1,42 @@
+"""Duration and chapter list for AAX files via ffprobe."""
+
+import json
+import shutil
+import subprocess
+from pathlib import Path
+
+
+def load_media_info(path: Path, activation_hex: str | None = None) -> tuple[float | None, list[dict]]:
+    """Return (total_duration_seconds, chapters) for the AAX file. Chapters have start_time, end_time, title."""
+    if not shutil.which("ffprobe"):
+        return None, []
+
+    try:
+        cmd = ["ffprobe", "-v", "quiet", "-print_format",
+               "json", "-show_format", "-show_chapters"]
+        if activation_hex:
+            cmd.extend(["-activation_bytes", activation_hex])
+        cmd.append(str(path))
+
+        result = subprocess.run(
+            cmd, capture_output=True, text=True, timeout=10)
+        if result.returncode != 0:
+            return None, []
+
+        data = json.loads(result.stdout)
+        format_info = data.get("format", {})
+        duration_str = format_info.get("duration")
+        duration = float(duration_str) if duration_str else None
+
+        chapters_data = data.get("chapters", [])
+        chapters = [
+            {
+                "start_time": float(ch.get("start_time", 0)),
+                "end_time": float(ch.get("end_time", 0)),
+                "title": ch.get("tags", {}).get("title", f"Chapter {idx + 1}"),
+            }
+            for idx, ch in enumerate(chapters_data)
+        ]
+        return duration, chapters
+    except (json.JSONDecodeError, subprocess.TimeoutExpired, ValueError, KeyError):
+        return None, []

auditui/playback/process.py

@@ -0,0 +1,68 @@
+"""FFplay process: build command, spawn, terminate, and send signals."""
+
+import os
+import shutil
+import signal
+import subprocess
+import time
+from pathlib import Path
+
+
+def build_ffplay_cmd(
+    path: Path,
+    activation_hex: str | None,
+    start_position: float,
+    speed: float,
+) -> list[str]:
+    """Build the ffplay command line for the given path and options."""
+    cmd = ["ffplay", "-nodisp", "-autoexit"]
+    if activation_hex:
+        cmd.extend(["-activation_bytes", activation_hex])
+    if start_position > 0:
+        cmd.extend(["-ss", str(start_position)])
+    if speed != 1.0:
+        cmd.extend(["-af", f"atempo={speed:.2f}"])
+    cmd.append(str(path))
+    return cmd
+
+
+def is_ffplay_available() -> bool:
+    """Return True if ffplay is on PATH."""
+    return shutil.which("ffplay") is not None
+
+
+def run_ffplay(cmd: list[str]) -> tuple[subprocess.Popen | None, int | None]:
+    """Spawn ffplay. Returns (proc, None) on success, (None, return_code) if process exited immediately, (None, None) if ffplay missing or spawn failed."""
+    if not is_ffplay_available():
+        return (None, None)
+    try:
+        proc = subprocess.Popen(
+            cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL
+        )
+        time.sleep(0.2)
+        if proc.poll() is not None:
+            return (None, proc.returncode)
+        return (proc, None)
+    except (OSError, ValueError, subprocess.SubprocessError):
+        return (None, None)
+
+
+def terminate_process(proc: subprocess.Popen | None) -> None:
+    """Terminate the process; kill if it does not exit within timeout."""
+    if proc is None:
+        return
+    try:
+        if proc.poll() is None:
+            proc.terminate()
+            try:
+                proc.wait(timeout=2)
+            except subprocess.TimeoutExpired:
+                proc.kill()
+                proc.wait()
+    except (ProcessLookupError, ValueError):
+        pass
+
+
+def send_signal(proc: subprocess.Popen, sig: signal.Signals) -> None:
+    """Send sig to the process. May raise ProcessLookupError, PermissionError, OSError."""
+    os.kill(proc.pid, sig)

auditui/playback/seek.py

@@ -0,0 +1,19 @@
+"""Seek target computation: new position and message from direction and seconds."""
+
+
+def compute_seek_target(
+    current_position: float,
+    total_duration: float | None,
+    seconds: float,
+    direction: str,
+) -> tuple[float, str] | None:
+    """Return (new_position, message) for a seek, or None if seek is invalid (e.g. at end)."""
+    if direction == "forward":
+        new_position = current_position + seconds
+        if total_duration is not None:
+            if new_position >= total_duration - 2:
+                return None
+            new_position = min(new_position, total_duration - 2)
+        return (new_position, f"Skipped forward {int(seconds)}s")
+    new_position = max(0.0, current_position - seconds)
+    return (new_position, f"Skipped backward {int(seconds)}s")

auditui/stats/__init__.py

@@ -0,0 +1,5 @@
+"""Listening and account statistics for the stats screen."""
+
+from .aggregator import StatsAggregator
+
+__all__ = ["StatsAggregator"]

auditui/stats/account.py

@@ -0,0 +1,71 @@
+"""Account and subscription data from the API."""
+
+from typing import Any
+
+
+def get_account_info(client: Any) -> dict:
+    if not client:
+        return {}
+    account_info = {}
+    endpoints = [
+        (
+            "1.0/account/information",
+            "subscription_details,plan_summary,subscription_details_payment_instrument,delinquency_status,customer_benefits,customer_segments,directed_ids",
+        ),
+        (
+            "1.0/customer/information",
+            "subscription_details_premium,subscription_details_rodizio,customer_segment,subscription_details_channels,migration_details",
+        ),
+        (
+            "1.0/customer/status",
+            "benefits_status,member_giving_status,prime_benefits_status,prospect_benefits_status",
+        ),
+    ]
+    for endpoint, response_groups in endpoints:
+        try:
+            response = client.get(endpoint, response_groups=response_groups)
+            account_info.update(response)
+        except Exception:
+            pass
+    return account_info
+
+
+def get_subscription_details(account_info: dict) -> dict:
+    paths = [
+        ["customer_details", "subscription", "subscription_details"],
+        ["customer", "customer_details", "subscription", "subscription_details"],
+        ["subscription_details"],
+        ["subscription", "subscription_details"],
+    ]
+    for path in paths:
+        data = account_info
+        for key in path:
+            if isinstance(data, dict):
+                data = data.get(key)
+            else:
+                break
+        if isinstance(data, list) and data:
+            return data[0]
+    return {}
+
+
+def get_country(auth: Any) -> str:
+    if not auth:
+        return "Unknown"
+    try:
+        locale_obj = getattr(auth, "locale", None)
+        if not locale_obj:
+            return "Unknown"
+        if hasattr(locale_obj, "country_code"):
+            return locale_obj.country_code.upper()
+        if hasattr(locale_obj, "domain"):
+            return locale_obj.domain.upper()
+        if isinstance(locale_obj, str):
+            return (
+                locale_obj.split("_")[-1].upper()
+                if "_" in locale_obj
+                else locale_obj.upper()
+            )
+        return str(locale_obj)
+    except Exception:
+        return "Unknown"

auditui/stats/aggregator.py

@@ -0,0 +1,85 @@
+"""Aggregates listening time, account info, and subscription data for display."""
+
+from datetime import date
+from typing import Any
+
+from ..types import LibraryItem
+
+from . import account as account_mod
+from . import email as email_mod
+from . import format as format_mod
+from . import listening as listening_mod
+
+
+class StatsAggregator:
+    """Builds a list of (label, value) stats from the API, auth, and library."""
+
+    def __init__(
+        self,
+        client: Any,
+        auth: Any,
+        library_client: Any,
+        all_items: list[LibraryItem],
+    ) -> None:
+        self.client = client
+        self.auth = auth
+        self.library_client = library_client
+        self.all_items = all_items
+
+    def get_stats(self, today: date | None = None) -> list[tuple[str, str]]:
+        if not self.client:
+            return []
+        today = today or date.today()
+        signup_year = listening_mod.get_signup_year(self.client)
+        month_time = listening_mod.get_listening_time(
+            self.client, 1, today.strftime("%Y-%m")
+        )
+        year_time = listening_mod.get_listening_time(
+            self.client, 12, today.strftime("%Y-01")
+        )
+        finished_count = listening_mod.get_finished_books_count(
+            self.library_client, self.all_items or []
+        )
+        total_books = len(self.all_items) if self.all_items else 0
+        email = email_mod.resolve_email(
+            self.auth,
+            self.client,
+            get_account_info=lambda: account_mod.get_account_info(self.client),
+        )
+        country = account_mod.get_country(self.auth)
+        subscription_name = "Unknown"
+        subscription_price = "Unknown"
+        next_bill_date = "Unknown"
+        account_info = account_mod.get_account_info(self.client)
+        if account_info:
+            subscription_data = account_mod.get_subscription_details(
+                account_info)
+            if subscription_data:
+                if name := subscription_data.get("name"):
+                    subscription_name = name
+                if bill_date := subscription_data.get("next_bill_date"):
+                    next_bill_date = format_mod.format_date(bill_date)
+                if bill_amount := subscription_data.get("next_bill_amount", {}):
+                    amount = bill_amount.get("currency_value")
+                    currency = bill_amount.get("currency_code", "EUR")
+                    if amount is not None:
+                        subscription_price = f"{amount} {currency}"
+        stats_items = []
+        if email != "Unknown":
+            stats_items.append(("Email", email))
+        stats_items.append(("Country Store", country))
+        stats_items.append(
+            ("Signup Year", str(signup_year) if signup_year > 0 else "Unknown")
+        )
+        if next_bill_date != "Unknown":
+            stats_items.append(("Next Credit", next_bill_date))
+            stats_items.append(("Next Bill", next_bill_date))
+        if subscription_name != "Unknown":
+            stats_items.append(("Subscription", subscription_name))
+        if subscription_price != "Unknown":
+            stats_items.append(("Price", subscription_price))
+        stats_items.append(("This Month", format_mod.format_time(month_time)))
+        stats_items.append(("This Year", format_mod.format_time(year_time)))
+        stats_items.append(
+            ("Books Finished", f"{finished_count} / {total_books}"))
+        return stats_items

auditui/stats/email.py

@@ -0,0 +1,155 @@
+"""Email resolution from auth, config, auth file, and account API."""
+
+import json
+from pathlib import Path
+from typing import Any, Callable
+
+from ..constants import AUTH_PATH, CONFIG_PATH
+
+
+def find_email_in_data(data: Any) -> str | None:
+    if data is None:
+        return None
+    stack = [data]
+    while stack:
+        current = stack.pop()
+        if isinstance(current, dict):
+            stack.extend(current.values())
+        elif isinstance(current, list):
+            stack.extend(current)
+        elif isinstance(current, str):
+            if "@" in current:
+                local, _, domain = current.partition("@")
+                if local and "." in domain:
+                    return current
+    return None
+
+
+def first_email(*values: str | None) -> str | None:
+    for value in values:
+        if value and value != "Unknown":
+            return value
+    return None
+
+
+def get_email_from_auth(auth: Any) -> str | None:
+    if not auth:
+        return None
+    try:
+        email = first_email(
+            getattr(auth, "username", None),
+            getattr(auth, "login", None),
+            getattr(auth, "email", None),
+        )
+        if email:
+            return email
+    except Exception:
+        return None
+    try:
+        customer_info = getattr(auth, "customer_info", None)
+        if isinstance(customer_info, dict):
+            email = first_email(
+                customer_info.get("email"),
+                customer_info.get("email_address"),
+                customer_info.get("primary_email"),
+            )
+            if email:
+                return email
+    except Exception:
+        return None
+    try:
+        data = getattr(auth, "data", None)
+        if isinstance(data, dict):
+            return first_email(
+                data.get("username"),
+                data.get("email"),
+                data.get("login"),
+                data.get("user_email"),
+            )
+    except Exception:
+        return None
+    return None
+
+
+def get_email_from_config(config_path: Path | None = None) -> str | None:
+    path = config_path or CONFIG_PATH
+    try:
+        if path.exists():
+            with open(path, "r", encoding="utf-8") as f:
+                config = json.load(f)
+                return first_email(
+                    config.get("email"),
+                    config.get("username"),
+                    config.get("login"),
+                )
+    except Exception:
+        return None
+    return None
+
+
+def get_email_from_auth_file(auth_path: Path | None = None) -> str | None:
+    path = auth_path or AUTH_PATH
+    try:
+        if path.exists():
+            with open(path, "r", encoding="utf-8") as f:
+                auth_file_data = json.load(f)
+                return first_email(
+                    auth_file_data.get("username"),
+                    auth_file_data.get("email"),
+                    auth_file_data.get("login"),
+                    auth_file_data.get("user_email"),
+                )
+    except Exception:
+        return None
+    return None
+
+
+def get_email_from_account_info(account_info: dict) -> str | None:
+    email = first_email(
+        account_info.get("email"),
+        account_info.get("customer_email"),
+        account_info.get("username"),
+    )
+    if email:
+        return email
+    customer_info = account_info.get("customer_info", {})
+    if isinstance(customer_info, dict):
+        return first_email(
+            customer_info.get("email"),
+            customer_info.get("email_address"),
+            customer_info.get("primary_email"),
+        )
+    return None
+
+
+def resolve_email(
+    auth: Any,
+    client: Any,
+    config_path: Path | None = None,
+    auth_path: Path | None = None,
+    get_account_info: Callable[[], dict] | None = None,
+) -> str:
+    config_path = config_path or CONFIG_PATH
+    auth_path = auth_path or AUTH_PATH
+    for getter in (
+        lambda: get_email_from_auth(auth),
+        lambda: get_email_from_config(config_path),
+        lambda: get_email_from_auth_file(auth_path),
+        lambda: get_email_from_account_info(
+            get_account_info()) if get_account_info else None,
+    ):
+        email = getter()
+        if email:
+            return email
+    auth_data = None
+    if auth:
+        try:
+            auth_data = getattr(auth, "data", None)
+        except Exception:
+            pass
+    account_info = get_account_info() if get_account_info else {}
+    for candidate in (auth_data, account_info):
+        email = find_email_in_data(candidate)
+        if email:
+            return email
+    return "Unknown"

auditui/stats/format.py

@@ -0,0 +1,22 @@
+"""Time and date formatting for stats display."""
+
+from datetime import datetime
+
+
+def format_time(milliseconds: int) -> str:
+    total_seconds = int(milliseconds) // 1000
+    hours, remainder = divmod(total_seconds, 3600)
+    minutes, _ = divmod(remainder, 60)
+    if hours > 0:
+        return f"{hours}h{minutes:02d}"
+    return f"{minutes}m"
+
+
+def format_date(date_str: str | None) -> str:
+    if not date_str:
+        return "Unknown"
+    try:
+        dt = datetime.fromisoformat(date_str.replace("Z", "+00:00"))
+        return dt.strftime("%Y-%m-%d")
+    except ValueError:
+        return date_str

auditui/stats/listening.py

@@ -0,0 +1,75 @@
+"""Listening time and signup year from stats API; finished books count."""
+
+from datetime import date
+from typing import Any
+
+from ..types import LibraryItem
+
+
+def has_activity(stats: dict) -> bool:
+    monthly_stats = stats.get("aggregated_monthly_listening_stats", [])
+    return bool(
+        monthly_stats and any(s.get("aggregated_sum", 0)
+                              > 0 for s in monthly_stats)
+    )
+
+
+def get_listening_time(client: Any, duration: int, start_date: str) -> int:
+    if not client:
+        return 0
+    try:
+        stats = client.get(
+            "1.0/stats/aggregates",
+            monthly_listening_interval_duration=str(duration),
+            monthly_listening_interval_start_date=start_date,
+            store="Audible",
+        )
+        monthly_stats = stats.get("aggregated_monthly_listening_stats", [])
+        return sum(s.get("aggregated_sum", 0) for s in monthly_stats)
+    except Exception:
+        return 0
+
+
+def get_signup_year(client: Any) -> int:
+    if not client:
+        return 0
+    current_year = date.today().year
+    try:
+        stats = client.get(
+            "1.0/stats/aggregates",
+            monthly_listening_interval_duration="12",
+            monthly_listening_interval_start_date=f"{current_year}-01",
+            store="Audible",
+        )
+        if not has_activity(stats):
+            return 0
+    except Exception:
+        return 0
+    left, right = 1995, current_year
+    earliest_year = current_year
+    while left <= right:
+        middle = (left + right) // 2
+        try:
+            stats = client.get(
+                "1.0/stats/aggregates",
+                monthly_listening_interval_duration="12",
+                monthly_listening_interval_start_date=f"{middle}-01",
+                store="Audible",
+            )
+            has_activity_ = has_activity(stats)
+        except Exception:
+            has_activity_ = False
+        if has_activity_:
+            earliest_year = middle
+            right = middle - 1
+        else:
+            left = middle + 1
+    return earliest_year
+
+
+def get_finished_books_count(
+    library_client: Any, all_items: list[LibraryItem]
+) -> int:
+    if not library_client or not all_items:
+        return 0
+    return sum(1 for item in all_items if library_client.is_finished(item))

auditui/types/__init__.py

@@ -0,0 +1,8 @@
+"""Shared type aliases for the Audible TUI."""
+
+from __future__ import annotations
+
+from typing import Callable
+
+LibraryItem = dict
+StatusCallback = Callable[[str], None]

auditui/ui/__init__.py

@@ -0,0 +1,7 @@
+"""Modal screens: help keybindings, filter input, and listening/account statistics."""
+
+from .filter_screen import FilterScreen
+from .help_screen import HelpScreen
+from .stats_screen import StatsScreen
+
+__all__ = ["FilterScreen", "HelpScreen", "StatsScreen"]

auditui/ui/common.py

@@ -0,0 +1,30 @@
+"""Shared protocol, constants, and mixin for modal screens that need app context."""
+
+from typing import Any, Protocol, cast
+
+
+class _AppContext(Protocol):
+    BINDINGS: list[tuple[str, str, str]]
+    client: Any
+    auth: Any
+    library_client: Any
+    all_items: list[dict]
+
+
+KEY_DISPLAY_MAP = {
+    "ctrl+": "^",
+    "left": "←",
+    "right": "→",
+    "up": "↑",
+    "down": "↓",
+    "space": "Space",
+    "enter": "Enter",
+}
+
+KEY_COLOR = "#f9e2af"
+DESC_COLOR = "#cdd6f4"
+
+
+class AppContextMixin:
+    def _app(self) -> _AppContext:
+        return cast(_AppContext, cast(Any, self).app)

auditui/ui/filter_screen.py

@@ -0,0 +1,66 @@
+"""Filter modal with input; returns filter string on dismiss."""
+
+from typing import Callable
+
+from textual.app import ComposeResult
+from textual.containers import Container
+from textual.screen import ModalScreen
+from textual.timer import Timer
+from textual.widgets import Input, Static
+
+from .common import KEY_COLOR
+
+
+class FilterScreen(ModalScreen[str]):
+    BINDINGS = [("escape", "cancel", "Cancel")]
+
+    def __init__(
+        self,
+        initial_filter: str = "",
+        on_change: Callable[[str], None] | None = None,
+        debounce_seconds: float = 0.2,
+    ) -> None:
+        super().__init__()
+        self._initial_filter = initial_filter
+        self._on_change = on_change
+        self._debounce_seconds = debounce_seconds
+        self._debounce_timer: Timer | None = None
+
+    def compose(self) -> ComposeResult:
+        with Container(id="filter_container"):
+            yield Static("Filter Library", id="filter_title")
+            yield Input(
+                value=self._initial_filter,
+                placeholder="Type to filter by title or author...",
+                id="filter_input",
+            )
+            yield Static(
+                f"Press [bold {KEY_COLOR}]Enter[/] to apply, "
+                f"[bold {KEY_COLOR}]Escape[/] to clear",
+                id="filter_footer",
+            )
+
+    def on_mount(self) -> None:
+        self.query_one("#filter_input", Input).focus()
+
+    def on_input_submitted(self, event: Input.Submitted) -> None:
+        self.dismiss(event.value)
+
+    def on_input_changed(self, event: Input.Changed) -> None:
+        callback = self._on_change
+        if not callback:
+            return
+        if self._debounce_timer:
+            self._debounce_timer.stop()
+        value = event.value
+        self._debounce_timer = self.set_timer(
+            self._debounce_seconds,
+            lambda: callback(value),
+        )
+
+    def action_cancel(self) -> None:
+        self.dismiss("")
+
+    def on_unmount(self) -> None:
+        if self._debounce_timer:
+            self._debounce_timer.stop()

auditui/ui/help_screen.py

@@ -0,0 +1,54 @@
+"""Help modal that lists keybindings from the main app."""
+
+from typing import TYPE_CHECKING, Any
+
+from textual.app import ComposeResult
+from textual.containers import Container, Vertical
+from textual.screen import ModalScreen
+from textual.widgets import Label, ListItem, ListView, Static
+
+from .common import KEY_COLOR, KEY_DISPLAY_MAP, DESC_COLOR, AppContextMixin
+
+if TYPE_CHECKING:
+    from textual.binding import Binding
+
+
+class HelpScreen(AppContextMixin, ModalScreen):
+    BINDINGS = [("escape", "dismiss", "Close"), ("?", "dismiss", "Close")]
+
+    @staticmethod
+    def _format_key_display(key: str) -> str:
+        result = key
+        for old, new in KEY_DISPLAY_MAP.items():
+            result = result.replace(old, new)
+        return result
+
+    @staticmethod
+    def _parse_binding(binding: "Binding | tuple[str, str, str]") -> tuple[str, str]:
+        if isinstance(binding, tuple):
+            return binding[0], binding[2]
+        return binding.key, binding.description
+
+    def _make_item(self, binding: "Binding | tuple[str, str, str]") -> ListItem:
+        key, description = self._parse_binding(binding)
+        key_display = self._format_key_display(key)
+        text = f"[bold {KEY_COLOR}]{key_display:>16}[/]  [{DESC_COLOR}]{description:<25}[/]"
+        return ListItem(Label(text))
+
+    def compose(self) -> ComposeResult:
+        app = self._app()
+        bindings = list(app.BINDINGS)
+        with Container(id="help_container"):
+            yield Static("Keybindings", id="help_title")
+            with Vertical(id="help_content"):
+                yield ListView(
+                    *[self._make_item(b) for b in bindings],
+                    classes="help_list",
+                )
+            yield Static(
+                f"Press [bold {KEY_COLOR}]?[/] or [bold {KEY_COLOR}]Escape[/] to close",
+                id="help_footer",
+            )
+
+    async def action_dismiss(self, result: Any | None = None) -> None:
+        await self.dismiss(result)

auditui/ui/stats_screen.py

@@ -0,0 +1,54 @@
+"""Statistics modal showing listening time and account info via StatsAggregator."""
+
+from datetime import date
+from typing import Any
+
+from textual.app import ComposeResult
+from textual.containers import Container, Vertical
+from textual.screen import ModalScreen
+from textual.widgets import Label, ListItem, ListView, Static
+
+from ..stats import StatsAggregator
+from .common import KEY_COLOR, DESC_COLOR, AppContextMixin
+
+
+class StatsScreen(AppContextMixin, ModalScreen):
+    BINDINGS = [("escape", "dismiss", "Close"), ("s", "dismiss", "Close")]
+
+    def _make_stat_item(self, label: str, value: str) -> ListItem:
+        text = f"[bold {KEY_COLOR}]{label:>16}[/]  [{DESC_COLOR}]{value:<25}[/]"
+        return ListItem(Label(text))
+
+    def compose(self) -> ComposeResult:
+        app = self._app()
+        if not app.client:
+            with Container(id="help_container"):
+                yield Static("Statistics", id="help_title")
+                yield Static(
+                    "Not authenticated. Please restart and authenticate.",
+                    classes="help_row",
+                )
+                yield Static(
+                    f"Press [bold {KEY_COLOR}]s[/] or [bold {KEY_COLOR}]Escape[/] to close",
+                    id="help_footer",
+                )
+            return
+        aggregator = StatsAggregator(
+            app.client, app.auth, app.library_client, app.all_items or []
+        )
+        stats_items = aggregator.get_stats(date.today())
+        with Container(id="help_container"):
+            yield Static("Statistics", id="help_title")
+            with Vertical(id="help_content"):
+                yield ListView(
+                    *[self._make_stat_item(label, value)
+                      for label, value in stats_items],
+                    classes="help_list",
+                )
+            yield Static(
+                f"Press [bold {KEY_COLOR}]s[/] or [bold {KEY_COLOR}]Escape[/] to close",
+                id="help_footer",
+            )
+
+    async def action_dismiss(self, result: Any | None = None) -> None:
+        await self.dismiss(result)

main.py

@@ -1,271 +0,0 @@
-#!/usr/bin/env python3
-
-import sys
-from getpass import getpass
-from pathlib import Path
-
-try:
-    import audible
-except ImportError:
-    print("Error: audible library not found. Install it with: pip install audible")
-    sys.exit(1)
-
-
-class Auditui:
-    AUTH_PATH = Path.home() / ".config" / "auditui" / "auth.json"
-
-    def __init__(self):
-        self.auth = None
-        self.client = None
-
-    def login_to_audible(self):
-        auth_file = self.AUTH_PATH
-        auth_file.parent.mkdir(parents=True, exist_ok=True)
-
-        if auth_file.exists():
-            try:
-                self.auth = audible.Authenticator.from_file(str(auth_file))
-                print("Loaded existing authentication.")
-                self.client = audible.Client(auth=self.auth)
-                return
-            except Exception as e:
-                print(f"Failed to load existing auth: {e}")
-                print("Please re-authenticate.")
-
-        print("Please authenticate with your Audible account.")
-        print("You will need to provide:")
-        print("  - Your Audible email/username")
-        print("  - Your password")
-        print("  - Your marketplace locale (e.g., 'US', 'UK', 'DE', 'FR')")
-
-        email = input("Email: ")
-        password = getpass("Password: ")
-        marketplace = input(
-            "Marketplace locale (default: US): ").strip().upper() or "US"
-
-        try:
-            self.auth = audible.Authenticator.from_login(
-                username=email,
-                password=password,
-                locale=marketplace
-            )
-
-            auth_file.parent.mkdir(parents=True, exist_ok=True)
-            self.auth.to_file(str(auth_file))
-            print("Authentication successful! Credentials saved.")
-            self.client = audible.Client(auth=self.auth)
-        except Exception as e:
-            print(f"Authentication failed: {e}")
-            sys.exit(1)
-
-    def format_duration(self, value, unit='minutes', default_none=None):
-        if value is None or value <= 0:
-            return default_none
-
-        if unit == 'seconds':
-            total_minutes = int(value) // 60
-        else:
-            total_minutes = int(value)
-
-        if total_minutes < 60:
-            return f"{total_minutes} minute{'s' if total_minutes != 1 else ''}"
-
-        hours = total_minutes // 60
-        mins = total_minutes % 60
-        if mins == 0:
-            return f"{hours} hour{'s' if hours != 1 else ''}"
-        return f"{hours} hour{'s' if hours != 1 else ''} {mins} minute{'s' if mins != 1 else ''}"
-
-    def _extract_title(self, item):
-        product = item.get("product", {})
-        return (product.get("title") or
-                item.get("title") or
-                product.get("asin", "Unknown Title"))
-
-    def _extract_authors(self, item):
-        product = item.get("product", {})
-        authors = product.get("authors") or product.get("contributors") or []
-        if not authors and "authors" in item:
-            authors = item.get("authors", [])
-        return ", ".join([a.get("name", "") for a in authors if isinstance(a, dict)])
-
-    def _extract_runtime_minutes(self, item):
-        product = item.get("product", {})
-        runtime_fields = [
-            "runtime_length_min",
-            "runtime_length",
-            "vLength",
-            "length",
-            "duration"
-        ]
-
-        runtime = None
-        for field in runtime_fields:
-            runtime = product.get(field)
-            if runtime is None:
-                runtime = item.get(field)
-            if runtime is not None:
-                break
-
-        if runtime is None:
-            return None
-
-        if isinstance(runtime, dict):
-            if "min" in runtime:
-                return int(runtime.get("min", 0))
-        elif isinstance(runtime, (int, float)):
-            return int(runtime)
-
-        return None
-
-    def _extract_progress_info(self, item):
-        percent_complete = item.get("percent_complete")
-        listening_status = item.get("listening_status", {})
-
-        if isinstance(listening_status, dict):
-            if percent_complete is None:
-                percent_complete = listening_status.get("percent_complete")
-            time_remaining_seconds = listening_status.get("time_remaining_seconds")
-        else:
-            time_remaining_seconds = None
-
-        return percent_complete, time_remaining_seconds
-
-    def _display_items(self, items):
-        if not items:
-            print("No books found.")
-            return
-
-        print("-" * 80)
-
-        for idx, item in enumerate(items, 1):
-            title = self._extract_title(item)
-            author_names = self._extract_authors(item)
-            minutes = self._extract_runtime_minutes(item)
-            runtime_str = self.format_duration(
-                minutes, unit='minutes', default_none="Unknown length")
-            percent_complete, time_remaining_seconds = self._extract_progress_info(item)
-
-            print(f"{idx}. {title}")
-            if author_names:
-                print(f"   Author: {author_names}")
-            print(f"   Length: {runtime_str}")
-
-            if percent_complete is not None and percent_complete > 0:
-                percent_str = f"{percent_complete:.1f}%"
-                print(f"   Progress: {percent_str} read")
-
-                if time_remaining_seconds:
-                    time_remaining_str = self.format_duration(
-                        time_remaining_seconds, unit='seconds')
-                    if time_remaining_str:
-                        print(f"   Time remaining: {time_remaining_str}")
-
-            print()
-
-        print("-" * 80)
-        print(f"Total: {len(items)} books")
-
-    def _fetch_all_pages(self, response_groups):
-        all_items = []
-        page = 1
-        page_size = 50
-
-        while True:
-            library = self.client.get(
-                path="library",
-                num_results=page_size,
-                page=page,
-                response_groups=response_groups
-            )
-
-            items = library.get("items", [])
-
-            if not items:
-                break
-
-            all_items.extend(items)
-            print(f"Fetched page {page} ({len(items)} items)...", end="\r")
-
-            if len(items) < page_size:
-                break
-
-            page += 1
-
-        return all_items
-
-    def list_library(self):
-        try:
-            print("\nFetching your library...")
-
-            all_items = self._fetch_all_pages(
-                "contributors,media,product_attrs,product_desc,product_details,rating"
-            )
-
-            print(f"\nFetched {len(all_items)} books total.\n")
-
-            if not all_items:
-                print("Your library is empty.")
-                return
-
-            self._display_items(all_items)
-
-        except Exception as e:
-            print(f"Error fetching library: {e}")
-
-    def list_unfinished(self):
-        try:
-            print("\nFetching your library...")
-
-            all_items = self._fetch_all_pages(
-                "contributors,media,product_attrs,product_desc,product_details,rating,is_finished,listening_status,percent_complete"
-            )
-
-            print(f"\nFetched {len(all_items)} books total.\n")
-
-            unfinished_items = []
-            finished_count = 0
-            for item in all_items:
-                is_finished_flag = item.get("is_finished")
-                percent_complete = item.get("percent_complete")
-                listening_status = item.get("listening_status")
-
-                if isinstance(listening_status, dict):
-                    is_finished_flag = is_finished_flag or listening_status.get(
-                        "is_finished", False)
-                    percent_complete = percent_complete if percent_complete is not None else listening_status.get(
-                        "percent_complete", 0)
-
-                is_finished = False
-                if is_finished_flag is True:
-                    is_finished = True
-                elif isinstance(percent_complete, (int, float)) and percent_complete >= 100:
-                    is_finished = True
-
-                if is_finished:
-                    finished_count += 1
-                else:
-                    unfinished_items.append(item)
-
-            print(
-                f"Found {len(unfinished_items)} unfinished books (filtered out {finished_count} finished books).\n")
-
-            if not unfinished_items:
-                print("No unfinished books found.")
-                return
-
-            self._display_items(unfinished_items)
-
-        except Exception as e:
-            print(f"Error fetching library: {e}")
-
-
-def main():
-    client = Auditui()
-    client.login_to_audible()
-    # client.list_library()
-    client.list_unfinished()
-
-
-if __name__ == "__main__":
-    main()

pyproject.toml

@@ -0,0 +1,32 @@
+[project]
+name = "auditui"
+version = "0.2.0"
+description = "An Audible TUI client"
+readme = "README.md"
+requires-python = ">=3.10,<3.13"
+dependencies = ["audible>=0.10.0", "httpx>=0.28.1", "textual>=8.0.0"]
+
+[project.optional-dependencies]
+dev = [
+  "coverage[toml]>=7.0",
+  "pytest>=7.0",
+  "pytest-asyncio>=0.23",
+  "httpx>=0.28.1",
+]
+
+[project.scripts]
+auditui = "auditui.cli:main"
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+
+[tool.coverage.run]
+branch = true
+source = ["auditui"]
+
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+
+[tool.uv]
+package = true

requirements.txt

@@ -1,2 +0,0 @@
-audible
-textual

tests/app/test_app_actions_download_hints.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, cast
+
+from auditui.app.actions import AppActionsMixin
+
+
+@dataclass(slots=True)
+class FakeTable:
+    """Minimal table shim exposing cursor and row count."""
+
+    row_count: int
+    cursor_row: int = 0
+
+
+class DummyActionsApp(AppActionsMixin):
+    """Minimal app host used for download naming hint tests."""
+
+    def __init__(self) -> None:
+        """Initialize state required by action helpers."""
+        self.current_items: list[dict] = []
+        self.download_manager = object()
+        self.library_client = type(
+            "Library", (), {"extract_asin": lambda self, item: item.get("asin")}
+        )()
+        self._table = FakeTable(row_count=0, cursor_row=0)
+
+    def update_status(self, message: str) -> None:
+        """Ignore status in this focused behavior test."""
+        del message
+
+    def query_one(self, selector: str, _type: object) -> FakeTable:
+        """Return the fake table used in selection tests."""
+        assert selector == "#library_table"
+        return self._table
+
+
+def test_action_toggle_download_passes_selected_item() -> None:
+    """Ensure download toggle forwards selected item for naming hints."""
+    app = DummyActionsApp()
+    seen: list[tuple[str, str | None]] = []
+
+    def capture_toggle(asin: str, item: dict | None = None) -> None:
+        """Capture download toggle arguments for assertions."""
+        seen.append((asin, item.get("title") if item else None))
+
+    setattr(cast(Any, app), "_toggle_download_async", capture_toggle)
+    app._table = FakeTable(row_count=1, cursor_row=0)
+    app.current_items = [{"asin": "ASIN", "title": "Book"}]
+    app.action_toggle_download()
+    assert seen == [("ASIN", "Book")]

tests/app/test_app_actions_selection_and_controls.py

@@ -0,0 +1,135 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, cast
+
+from auditui.app.actions import AppActionsMixin
+
+
+@dataclass(slots=True)
+class FakeTable:
+    """Minimal table shim exposing cursor and row count."""
+
+    row_count: int
+    cursor_row: int = 0
+
+
+class FakePlayback:
+    """Playback stub with togglable boolean return values."""
+
+    def __init__(self, result: bool) -> None:
+        """Store deterministic toggle result for tests."""
+        self._result = result
+        self.calls: list[str] = []
+
+    def toggle_playback(self) -> bool:
+        """Return configured result and record call."""
+        self.calls.append("toggle")
+        return self._result
+
+    def seek_forward(self, _seconds: float) -> bool:
+        """Return configured result and record call."""
+        self.calls.append("seek_forward")
+        return self._result
+
+
+class DummyActionsApp(AppActionsMixin):
+    """Mixin host with just enough state for action method tests."""
+
+    def __init__(self) -> None:
+        """Initialize fake app state used by action helpers."""
+        self.messages: list[str] = []
+        self.current_items: list[dict] = []
+        self.download_manager = object()
+        self.library_client = type(
+            "Library",
+            (),
+            {
+                "extract_asin": lambda self, item: item.get("asin"),
+                "extract_title": lambda self, item: item.get("title"),
+                "extract_authors": lambda self, item: item.get("authors"),
+            },
+        )()
+        self.playback = FakePlayback(True)
+        self.filter_text = "hello"
+        self._refreshed = 0
+        self._table = FakeTable(row_count=0, cursor_row=0)
+
+    def update_status(self, message: str) -> None:
+        """Collect status messages for assertions."""
+        self.messages.append(message)
+
+    def query_one(self, selector: str, _type: object) -> FakeTable:
+        """Return the fake table used in selection tests."""
+        assert selector == "#library_table"
+        return self._table
+
+    def _refresh_filtered_view(self) -> None:
+        """Record refresh invocations for filter tests."""
+        self._refreshed += 1
+
+
+def test_get_selected_asin_requires_non_empty_table() -> None:
+    """Ensure selection fails gracefully when table has no rows."""
+    app = DummyActionsApp()
+    app._table = FakeTable(row_count=0)
+    assert app._get_selected_asin() is None
+    assert app.messages[-1] == "No books available"
+
+
+def test_get_selected_asin_returns_current_row_asin() -> None:
+    """Ensure selected row index maps to current_items ASIN."""
+    app = DummyActionsApp()
+    app._table = FakeTable(row_count=2, cursor_row=1)
+    app.current_items = [{"asin": "A1"}, {"asin": "A2"}]
+    assert app._get_selected_asin() == "A2"
+
+
+def test_action_play_selected_starts_async_playback() -> None:
+    """Ensure play action calls async starter with selected ASIN."""
+    app = DummyActionsApp()
+    seen: list[str] = []
+
+    def capture_start(asin: str, item: dict | None = None) -> None:
+        """Capture playback start arguments for assertions."""
+        suffix = f":{item.get('title')}" if item else ""
+        seen.append(f"start:{asin}{suffix}")
+
+    setattr(cast(Any, app), "_start_playback_async", capture_start)
+    app._table = FakeTable(row_count=1, cursor_row=0)
+    app.current_items = [{"asin": "ASIN", "title": "Book"}]
+    app.action_play_selected()
+    assert seen[-1] == "start:ASIN:Book"
+
+
+def test_action_toggle_playback_shows_hint_when_no_playback() -> None:
+    """Ensure toggle action displays no-playback hint on false return."""
+    app = DummyActionsApp()
+    app.playback = FakePlayback(False)
+    app.action_toggle_playback()
+    assert app.messages[-1] == "No playback active. Press Enter to play a book."
+
+
+def test_action_seek_forward_shows_hint_when_seek_fails() -> None:
+    """Ensure failed seek action reuses no-playback helper status."""
+    app = DummyActionsApp()
+    app.playback = FakePlayback(False)
+    app.action_seek_forward()
+    assert app.messages[-1] == "No playback active. Press Enter to play a book."
+
+
+def test_action_clear_filter_resets_filter_and_refreshes() -> None:
+    """Ensure clearing filter resets text and refreshes filtered view."""
+    app = DummyActionsApp()
+    app.action_clear_filter()
+    assert app.filter_text == ""
+    assert app._refreshed == 1
+    assert app.messages[-1] == "Filter cleared"
+
+
+def test_apply_filter_coerces_none_to_empty_string() -> None:
+    """Ensure apply_filter normalizes None and refreshes list view."""
+    app = DummyActionsApp()
+    app._apply_filter(None)
+    assert app.filter_text == ""
+    assert app._refreshed == 1

tests/app/test_app_bindings_contract.py

@@ -0,0 +1,56 @@
+from __future__ import annotations
+
+from typing import TypeAlias
+
+from auditui.app.bindings import BINDINGS
+from textual.binding import Binding
+
+
+BindingTuple: TypeAlias = tuple[str, str, str]
+NormalizedBinding: TypeAlias = tuple[str, str, str, bool]
+
+EXPECTED_BINDINGS: tuple[NormalizedBinding, ...] = (
+    ("?", "show_help", "Help", False),
+    ("s", "show_stats", "Stats", False),
+    ("/", "filter", "Filter", False),
+    ("escape", "clear_filter", "Clear filter", False),
+    ("n", "sort", "Sort by name", False),
+    ("p", "sort_by_progress", "Sort by progress", False),
+    ("a", "show_all", "All/Unfinished", False),
+    ("r", "refresh", "Refresh", False),
+    ("enter", "play_selected", "Play", False),
+    ("space", "toggle_playback", "Pause/Resume", True),
+    ("left", "seek_backward", "-30s", False),
+    ("right", "seek_forward", "+30s", False),
+    ("ctrl+left", "previous_chapter", "Previous chapter", False),
+    ("ctrl+right", "next_chapter", "Next chapter", False),
+    ("up", "increase_speed", "Increase speed", False),
+    ("down", "decrease_speed", "Decrease speed", False),
+    ("f", "toggle_finished", "Mark finished", False),
+    ("d", "toggle_download", "Download/Delete", False),
+    ("q", "quit", "Quit", False),
+)
+
+
+def _normalize_binding(binding: Binding | BindingTuple) -> NormalizedBinding:
+    """Return key, action, description, and priority from one binding item."""
+    if isinstance(binding, Binding):
+        return (binding.key, binding.action, binding.description, binding.priority)
+    key, action, description = binding
+    return (key, action, description, False)
+
+
+def _all_bindings() -> list[NormalizedBinding]:
+    """Normalize all app bindings into a stable comparable structure."""
+    return [_normalize_binding(binding) for binding in BINDINGS]
+
+
+def test_bindings_match_expected_shortcuts() -> None:
+    """Ensure the shipped shortcut list stays stable and explicit."""
+    assert _all_bindings() == list(EXPECTED_BINDINGS)
+
+
+def test_binding_keys_are_unique() -> None:
+    """Ensure each key is defined only once to avoid dispatch ambiguity."""
+    keys = [binding[0] for binding in _all_bindings()]
+    assert len(keys) == len(set(keys))

tests/app/test_app_library_mixin_behavior.py

@@ -0,0 +1,114 @@
+from __future__ import annotations
+
+from auditui.app.library import AppLibraryMixin
+from auditui.app import library as library_mod
+
+
+class DummyLibraryApp(AppLibraryMixin):
+    """Mixin host exposing only members used by AppLibraryMixin."""
+
+    def __init__(self) -> None:
+        """Initialize in-memory app state and call tracking."""
+        self.all_items: list[dict] = []
+        self.show_all_mode = False
+        self._search_text_cache: dict[int, str] = {1: "x"}
+        self.messages: list[str] = []
+        self.call_log: list[tuple[str, tuple]] = []
+        self.library_client = None
+
+    def _prime_search_cache(self, items: list[dict]) -> None:
+        """Store a marker so callers can assert this method was reached."""
+        self.call_log.append(("prime", (items,)))
+
+    def show_all(self) -> None:
+        """Record show_all invocation for assertion."""
+        self.call_log.append(("show_all", ()))
+
+    def show_unfinished(self) -> None:
+        """Record show_unfinished invocation for assertion."""
+        self.call_log.append(("show_unfinished", ()))
+
+    def update_status(self, message: str) -> None:
+        """Capture status messages."""
+        self.messages.append(message)
+
+    def call_from_thread(self, func, *args) -> None:
+        """Execute callback immediately to simplify tests."""
+        func(*args)
+
+    def _thread_status_update(self, message: str) -> None:
+        """Capture worker-thread status update messages."""
+        self.messages.append(message)
+
+
+def test_on_library_loaded_refreshes_cache_and_shows_unfinished() -> None:
+    """Ensure loaded items reset cache and default to unfinished view."""
+    app = DummyLibraryApp()
+    items = [{"asin": "a"}, {"asin": "b"}]
+    app.on_library_loaded(items)
+    assert app.all_items == items
+    assert app._search_text_cache == {}
+    assert app.messages[-1] == "Loaded 2 books"
+    assert app.call_log[-1][0] == "show_unfinished"
+
+
+def test_on_library_loaded_uses_show_all_mode() -> None:
+    """Ensure loaded items respect show_all mode when enabled."""
+    app = DummyLibraryApp()
+    app.show_all_mode = True
+    app.on_library_loaded([{"asin": "a"}])
+    assert app.call_log[-1][0] == "show_all"
+
+
+def test_on_library_error_formats_message() -> None:
+    """Ensure library errors are surfaced through status updates."""
+    app = DummyLibraryApp()
+    app.on_library_error("boom")
+    assert app.messages == ["Error fetching library: boom"]
+
+
+def test_fetch_library_calls_on_loaded(monkeypatch) -> None:
+    """Ensure fetch_library forwards fetched items through call_from_thread."""
+    app = DummyLibraryApp()
+
+    class Worker:
+        """Simple worker shim exposing cancellation state."""
+
+        is_cancelled = False
+
+    class LibraryClient:
+        """Fake client returning a deterministic item list."""
+
+        def fetch_all_items(self, callback):
+            """Invoke callback and return one item."""
+            callback("progress")
+            return [{"asin": "x"}]
+
+    app.library_client = LibraryClient()
+    monkeypatch.setattr(library_mod, "get_current_worker", lambda: Worker())
+    AppLibraryMixin.fetch_library.__wrapped__(app)
+    assert app.all_items == [{"asin": "x"}]
+    assert "Loaded 1 books" in app.messages
+
+
+def test_fetch_library_handles_expected_exception(monkeypatch) -> None:
+    """Ensure fetch exceptions call on_library_error with error text."""
+    app = DummyLibraryApp()
+
+    class Worker:
+        """Simple worker shim exposing cancellation state."""
+
+        is_cancelled = False
+
+    class BrokenClient:
+        """Fake client raising an expected fetch exception."""
+
+        def fetch_all_items(self, callback):
+            """Raise the same exception family handled by mixin."""
+            del callback
+            raise ValueError("bad fetch")
+
+    app.library_client = BrokenClient()
+    monkeypatch.setattr(library_mod, "get_current_worker", lambda: Worker())
+    AppLibraryMixin.fetch_library.__wrapped__(app)
+    assert app.messages[-1] == "Error fetching library: bad fetch"

tests/app/test_app_progress_mixin_behavior.py

@@ -0,0 +1,148 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import cast
+
+from auditui.app.progress import AppProgressMixin
+from textual.events import Key
+from textual.widgets import DataTable
+
+
+@dataclass(slots=True)
+class FakeKeyEvent:
+    """Minimal key event carrying key value and prevent_default state."""
+
+    key: str
+    prevented: bool = False
+
+    def prevent_default(self) -> None:
+        """Mark event as prevented."""
+        self.prevented = True
+
+
+@dataclass(slots=True)
+class FakeStatic:
+    """Minimal static widget with text and visibility fields."""
+
+    display: bool = False
+    text: str = ""
+
+    def update(self, value: str) -> None:
+        """Store rendered text value."""
+        self.text = value
+
+
+@dataclass(slots=True)
+class FakeProgressBar:
+    """Minimal progress bar widget storing latest progress value."""
+
+    progress: float = 0.0
+
+    def update(self, progress: float) -> None:
+        """Store progress value for assertions."""
+        self.progress = progress
+
+
+@dataclass(slots=True)
+class FakeContainer:
+    """Minimal container exposing display property."""
+
+    display: bool = False
+
+
+class DummyPlayback:
+    """Playback shim exposing only members used by AppProgressMixin."""
+
+    def __init__(self) -> None:
+        """Initialize playback state and update counters."""
+        self.is_playing = False
+        self._status: str | None = None
+        self._progress: tuple[str, float, float] | None = None
+        self.saved_calls = 0
+
+    def check_status(self):
+        """Return configurable status check message."""
+        return self._status
+
+    def get_current_progress(self):
+        """Return configurable progress tuple."""
+        return self._progress
+
+    def update_position_if_needed(self) -> None:
+        """Record periodic save invocations."""
+        self.saved_calls += 1
+
+
+class DummyProgressApp(AppProgressMixin):
+    """Mixin host that records action dispatch and widget updates."""
+
+    def __init__(self) -> None:
+        """Initialize fake widgets and playback state."""
+        self.playback = DummyPlayback()
+        self.focused = object()
+        self.actions: list[str] = []
+        self.messages: list[str] = []
+        self.progress_info = FakeStatic()
+        self.progress_bar = FakeProgressBar()
+        self.progress_container = FakeContainer()
+
+    def action_seek_backward(self) -> None:
+        """Record backward seek action dispatch."""
+        self.actions.append("seek_backward")
+
+    def action_toggle_playback(self) -> None:
+        """Record toggle playback action dispatch."""
+        self.actions.append("toggle")
+
+    def update_status(self, message: str) -> None:
+        """Capture status messages for assertions."""
+        self.messages.append(message)
+
+    def query_one(self, selector: str, _type: object):
+        """Return fake widgets by selector used by progress mixin."""
+        return {
+            "#progress_info": self.progress_info,
+            "#progress_bar": self.progress_bar,
+            "#progress_bar_container": self.progress_container,
+        }[selector]
+
+
+def test_on_key_dispatches_seek_when_playing() -> None:
+    """Ensure left key is intercepted and dispatched to seek action."""
+    app = DummyProgressApp()
+    app.playback.is_playing = True
+    event = FakeKeyEvent("left")
+    app.on_key(cast(Key, event))
+    assert event.prevented is True
+    assert app.actions == ["seek_backward"]
+
+
+def test_on_key_dispatches_space_when_table_focused() -> None:
+    """Ensure space is intercepted and dispatched when table is focused."""
+    app = DummyProgressApp()
+    app.focused = DataTable()
+    event = FakeKeyEvent("space")
+    app.on_key(cast(Key, event))
+    assert event.prevented is True
+    assert app.actions == ["toggle"]
+
+
+def test_check_playback_status_hides_progress_after_message() -> None:
+    """Ensure playback status message triggers hide-progress behavior."""
+    app = DummyProgressApp()
+    app.playback._status = "Finished"
+    app._check_playback_status()
+    assert app.messages[-1] == "Finished"
+    assert app.progress_info.display is False
+    assert app.progress_container.display is False
+
+
+def test_update_progress_renders_visible_progress_row() -> None:
+    """Ensure valid progress data updates widgets and makes them visible."""
+    app = DummyProgressApp()
+    app.playback.is_playing = True
+    app.playback._progress = ("Chapter", 30.0, 60.0)
+    app._update_progress()
+    assert app.progress_bar.progress == 50.0
+    assert app.progress_info.display is True
+    assert app.progress_container.display is True

tests/app/test_app_progress_periodic_save.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from auditui.app.progress import AppProgressMixin
+
+
+class DummyPlayback:
+    """Playback stub exposing periodic update method."""
+
+    def __init__(self) -> None:
+        """Initialize call counter."""
+        self.saved_calls = 0
+
+    def update_position_if_needed(self) -> None:
+        """Increment call counter for assertions."""
+        self.saved_calls += 1
+
+
+class DummyProgressApp(AppProgressMixin):
+    """Minimal app host containing playback dependency only."""
+
+    def __init__(self) -> None:
+        """Initialize playback stub."""
+        self.playback = DummyPlayback()
+
+
+def test_save_position_periodically_delegates_to_playback() -> None:
+    """Ensure periodic save method delegates to playback updater."""
+    app = DummyProgressApp()
+    app._save_position_periodically()
+    assert app.playback.saved_calls == 1

tests/app/test_app_search_cache_logic.py

@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any, cast
+
+from auditui.app import Auditui
+from auditui.library import build_search_text, filter_items
+
+
+class StubLibrary:
+    """Minimal library facade used by search-related app helpers."""
+
+    def extract_title(self, item: dict) -> str:
+        """Return title from a synthetic item."""
+        return item.get("title", "")
+
+    def extract_authors(self, item: dict) -> str:
+        """Return authors from a synthetic item."""
+        return item.get("authors", "")
+
+
+@dataclass(slots=True)
+class DummyAuditui:
+    """Narrow object compatible with Auditui search-cache helper calls."""
+
+    _search_text_cache: dict[int, str] = field(default_factory=dict)
+    library_client: StubLibrary = field(default_factory=StubLibrary)
+
+
+def test_get_search_text_is_cached() -> None:
+    """Ensure repeated text extraction for one item reuses cache entries."""
+    item = {"title": "Title", "authors": "Author"}
+    dummy = DummyAuditui()
+    first = Auditui._get_search_text(cast(Auditui, dummy), item)
+    second = Auditui._get_search_text(cast(Auditui, dummy), item)
+    assert first == "title author"
+    assert first == second
+    assert len(dummy._search_text_cache) == 1
+
+
+def test_filter_items_uses_cached_callable() -> None:
+    """Ensure filter_items cooperates with a memoized search text callback."""
+    library = StubLibrary()
+    cache: dict[int, str] = {}
+    items = [
+        {"title": "Alpha", "authors": "Author One"},
+        {"title": "Beta", "authors": "Author Two"},
+    ]
+
+    def cached(item: dict) -> str:
+        """Build and cache normalized search text per object identity."""
+        cache_key = id(item)
+        if cache_key not in cache:
+            cache[cache_key] = build_search_text(item, cast(Any, library))
+        return cache[cache_key]
+
+    result = filter_items(items, "beta", cached)
+    assert result == [items[1]]
+
+
+def test_build_search_text_without_library_client() -> None:
+    """Ensure fallback search text path handles inline author dicts."""
+    item = {"title": "Title", "authors": [{"name": "A"}, {"name": "B"}]}
+    assert build_search_text(item, None) == "title a, b"

tests/app/test_app_state_initialization.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+from auditui.app import state as state_mod
+
+
+class DummyApp:
+    """Lightweight app object for state initialization tests."""
+
+    def __init__(self) -> None:
+        """Expose update_status to satisfy init dependencies."""
+        self.messages: list[str] = []
+
+    def update_status(self, message: str) -> None:
+        """Collect status updates for assertions."""
+        self.messages.append(message)
+
+
+def test_init_state_without_auth_or_client(monkeypatch) -> None:
+    """Ensure baseline state is initialized when no auth/client is provided."""
+    app = DummyApp()
+    playback_args: list[tuple[object, object]] = []
+
+    class FakePlayback:
+        """Playback constructor recorder for init tests."""
+
+        def __init__(self, notify, library_client) -> None:
+            """Capture arguments passed by init_auditui_state."""
+            playback_args.append((notify, library_client))
+
+    monkeypatch.setattr(state_mod, "PlaybackController", FakePlayback)
+    state_mod.init_auditui_state(app)
+    assert app.library_client is None
+    assert app.download_manager is None
+    assert app.all_items == []
+    assert app.current_items == []
+    assert app.filter_text == ""
+    assert app.show_all_mode is False
+    assert playback_args and playback_args[0][1] is None
+
+
+def test_init_state_with_auth_and_client_builds_dependencies(monkeypatch) -> None:
+    """Ensure init constructs library, downloads, and playback dependencies."""
+    app = DummyApp()
+    auth = object()
+    client = object()
+
+    class FakeLibraryClient:
+        """Fake library client constructor for dependency wiring checks."""
+
+        def __init__(self, value) -> None:
+            """Store constructor argument for assertions."""
+            self.value = value
+
+    class FakeDownloadManager:
+        """Fake download manager constructor for dependency wiring checks."""
+
+        def __init__(self, auth_value, client_value) -> None:
+            """Store constructor arguments for assertions."""
+            self.args = (auth_value, client_value)
+
+    class FakePlayback:
+        """Fake playback constructor for dependency wiring checks."""
+
+        def __init__(self, notify, library_client) -> None:
+            """Store constructor arguments for assertions."""
+            self.notify = notify
+            self.library_client = library_client
+
+    monkeypatch.setattr(state_mod, "LibraryClient", FakeLibraryClient)
+    monkeypatch.setattr(state_mod, "DownloadManager", FakeDownloadManager)
+    monkeypatch.setattr(state_mod, "PlaybackController", FakePlayback)
+    state_mod.init_auditui_state(app, auth=auth, client=client)
+    assert isinstance(app.library_client, FakeLibraryClient)
+    assert isinstance(app.download_manager, FakeDownloadManager)
+    assert isinstance(app.playback, FakePlayback)
+    assert app.library_client.value is client
+    assert app.download_manager.args == (auth, client)
+    assert app.playback.library_client.value is client

tests/app/test_app_table_row_keys.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from auditui.app.table import AppTableMixin
+
+
+class DummyTableApp(AppTableMixin):
+    """Minimal host exposing library client for row key helper tests."""
+
+    def __init__(self) -> None:
+        """Initialize a fake library client with ASIN extraction."""
+        self.library_client = type(
+            "Library",
+            (),
+            {"extract_asin": lambda self, item: item.get("asin")},
+        )()
+
+
+def test_build_row_key_prefers_asin_and_remains_unique() -> None:
+    """Ensure duplicate ASINs receive deterministic unique key suffixes."""
+    app = DummyTableApp()
+    used: set[str] = set()
+    item = {"asin": "ASIN1"}
+    first = app._build_row_key(item, "Title", 0, used)
+    second = app._build_row_key(item, "Title", 1, used)
+    assert first == "ASIN1"
+    assert second == "ASIN1#2"
+
+
+def test_build_row_key_falls_back_to_title_and_index() -> None:
+    """Ensure missing ASIN values use title-index fallback keys."""
+    app = DummyTableApp()
+    used: set[str] = set()
+    key = app._build_row_key({"asin": None}, "Unknown Title", 3, used)
+    assert key == "Unknown Title#3"

tests/conftest.py

@@ -0,0 +1,41 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+from types import ModuleType
+from typing import Any, cast
+
+
+ROOT = Path(__file__).resolve().parents[1]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+
+try:
+    import audible  # noqa: F401
+except ModuleNotFoundError:
+    audible_stub = ModuleType("audible")
+
+    class Authenticator:
+        """Minimal audible authenticator test stub."""
+
+        pass
+
+    class Client:
+        """Minimal audible client test stub."""
+
+        pass
+
+    setattr(cast(Any, audible_stub), "Authenticator", Authenticator)
+    setattr(cast(Any, audible_stub), "Client", Client)
+
+    activation_bytes = ModuleType("audible.activation_bytes")
+
+    def get_activation_bytes(_auth: Authenticator | None = None) -> bytes:
+        """Return deterministic empty activation bytes for tests."""
+        return b""
+
+    setattr(cast(Any, activation_bytes), "get_activation_bytes", get_activation_bytes)
+
+    sys.modules["audible"] = audible_stub
+    sys.modules["audible.activation_bytes"] = activation_bytes

tests/downloads/test_download_manager_cache_and_validation.py

@@ -0,0 +1,91 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any, cast
+
+import pytest
+
+from auditui.constants import MIN_FILE_SIZE
+from auditui.downloads import DownloadManager
+
+
+def _manager_with_cache_dir(tmp_path: Path) -> DownloadManager:
+    """Build a lightweight DownloadManager instance without real HTTP clients."""
+    manager = DownloadManager.__new__(DownloadManager)
+    manager.cache_dir = tmp_path
+    manager.chunk_size = 1024
+    return manager
+
+
+def test_sanitize_filename_replaces_invalid_characters() -> None:
+    """Ensure filename normalization uses ASCII words and dashes."""
+    manager = DownloadManager.__new__(DownloadManager)
+    assert (
+        manager._sanitize_filename("Stephen King 11/22/63") == "Stephen-King-11-22-63"
+    )
+
+
+def test_validate_download_url_accepts_only_http_schemes() -> None:
+    """Ensure download URL validation only accepts HTTP and HTTPS links."""
+    manager = DownloadManager.__new__(DownloadManager)
+    assert manager._validate_download_url("https://example.com/file") is True
+    assert manager._validate_download_url("http://example.com/file") is True
+    assert manager._validate_download_url("ftp://example.com/file") is False
+
+
+def test_get_cached_path_and_remove_cached(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure cache lookup and cache deletion work for valid files."""
+    manager = _manager_with_cache_dir(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin: ["Stephen-King_11-22-63", "11-22-63"],
+    )
+    cached_path = tmp_path / "Stephen-King_11-22-63.aax"
+    cached_path.write_bytes(b"0" * MIN_FILE_SIZE)
+    messages: list[str] = []
+    assert manager.get_cached_path("ASIN123") == cached_path
+    assert manager.is_cached("ASIN123") is True
+    assert manager.remove_cached("ASIN123", notify=messages.append) is True
+    assert not cached_path.exists()
+    assert "Removed from cache" in messages[-1]
+
+
+def test_get_cached_path_ignores_small_files(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure undersized files are not treated as valid cache entries."""
+    manager = _manager_with_cache_dir(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin: ["Stephen-King_11-22-63", "11-22-63"],
+    )
+    cached_path = tmp_path / "Stephen-King_11-22-63.aax"
+    cached_path.write_bytes(b"0" * (MIN_FILE_SIZE - 1))
+    assert manager.get_cached_path("ASIN123") is None
+
+
+def test_get_filename_stems_include_author_title_and_legacy_title() -> None:
+    """Ensure filename candidates include new author_title and legacy title names."""
+    manager = DownloadManager.__new__(DownloadManager)
+    manager.client = cast(
+        Any,
+        type(
+            "Client",
+            (),
+            {
+                "get": lambda self, path, **kwargs: {
+                    "product": {
+                        "title": "11/22/63",
+                        "authors": [{"name": "Stephen King"}],
+                    }
+                }
+            },
+        )(),
+    )
+    stems = manager._get_filename_stems_from_asin("B00TEST")
+    assert stems[0] == "Stephen-King_11-22-63"
+    assert "11-22-63" in stems

tests/downloads/test_download_manager_workflow.py

@@ -0,0 +1,160 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any, cast
+
+import pytest
+
+from auditui.constants import MIN_FILE_SIZE
+from auditui.downloads import DownloadManager
+from auditui.downloads import manager as manager_mod
+
+
+def _bare_manager(tmp_path: Path) -> DownloadManager:
+    """Create manager without invoking constructor side effects."""
+    manager = DownloadManager.__new__(DownloadManager)
+    manager.cache_dir = tmp_path
+    manager.chunk_size = 1024
+    manager.auth = cast(
+        Any,
+        type(
+            "Auth",
+            (),
+            {"adp_token": "x", "locale": type("Loc", (), {"domain": "fr"})()},
+        )(),
+    )
+    return manager
+
+
+def test_get_activation_bytes_returns_hex(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    """Ensure activation bytes are converted to lowercase hex string."""
+    manager = _bare_manager(tmp_path)
+    monkeypatch.setattr(manager_mod, "get_activation_bytes", lambda _auth: b"\xde\xad")
+    assert manager.get_activation_bytes() == "dead"
+
+
+def test_get_activation_bytes_handles_errors(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    """Ensure activation retrieval failures are handled gracefully."""
+    manager = _bare_manager(tmp_path)
+
+    def _boom(_auth: object) -> bytes:
+        """Raise a deterministic failure for exception-path coverage."""
+        raise OSError("no auth")
+
+    monkeypatch.setattr(manager_mod, "get_activation_bytes", _boom)
+    assert manager.get_activation_bytes() is None
+
+
+def test_get_or_download_uses_cached_file_when_available(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure cached files bypass link generation and download work."""
+    manager = _bare_manager(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin, preferred_title=None, preferred_author=None: ["Author_Book"],
+    )
+    cached_path = tmp_path / "Author_Book.aax"
+    cached_path.write_bytes(b"1" * MIN_FILE_SIZE)
+    messages: list[str] = []
+    assert manager.get_or_download("ASIN", notify=messages.append) == cached_path
+    assert "Using cached file" in messages[0]
+
+
+def test_get_or_download_reports_invalid_url(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure workflow reports invalid download URLs and aborts."""
+    manager = _bare_manager(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin, preferred_title=None, preferred_author=None: ["Author_Book"],
+    )
+    monkeypatch.setattr(
+        manager, "_get_download_link", lambda asin, notify=None: "ftp://bad"
+    )
+    messages: list[str] = []
+    assert manager.get_or_download("ASIN", notify=messages.append) is None
+    assert "Invalid download URL" in messages
+
+
+def test_get_or_download_handles_download_failure(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure workflow reports failures when stream download does not complete."""
+    manager = _bare_manager(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin, preferred_title=None, preferred_author=None: ["Author_Book"],
+    )
+    monkeypatch.setattr(
+        manager, "_get_download_link", lambda asin, notify=None: "https://ok"
+    )
+    monkeypatch.setattr(manager, "_download_file", lambda url, path, notify=None: None)
+    messages: list[str] = []
+    assert manager.get_or_download("ASIN", notify=messages.append) is None
+    assert "Download failed" in messages
+
+
+def test_get_or_download_uses_preferred_naming_hints(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure preferred title/author are forwarded to filename stem selection."""
+    manager = _bare_manager(tmp_path)
+    captured: list[tuple[str | None, str | None]] = []
+
+    def stems(
+        asin: str,
+        preferred_title: str | None = None,
+        preferred_author: str | None = None,
+    ) -> list[str]:
+        """Capture naming hints and return one deterministic filename stem."""
+        del asin
+        captured.append((preferred_title, preferred_author))
+        return ["Author_Book"]
+
+    monkeypatch.setattr(manager, "_get_filename_stems_from_asin", stems)
+    monkeypatch.setattr(manager, "_get_download_link", lambda asin, notify=None: None)
+    manager.get_or_download(
+        "ASIN",
+        preferred_title="11/22/63",
+        preferred_author="Stephen King",
+    )
+    assert captured == [("11/22/63", "Stephen King")]
+
+
+def test_get_or_download_retries_when_file_is_too_small(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Ensure small downloads are retried and then reported with exact byte size."""
+    manager = _bare_manager(tmp_path)
+    monkeypatch.setattr(
+        manager,
+        "_get_filename_stems_from_asin",
+        lambda asin, preferred_title=None, preferred_author=None: ["Author_Book"],
+    )
+    monkeypatch.setattr(
+        manager, "_get_download_link", lambda asin, notify=None: "https://ok"
+    )
+    attempts = {"count": 0}
+
+    def write_small_file(url: str, path: Path, notify=None) -> Path:
+        """Write an undersized file to trigger retry and final failure messages."""
+        del url, notify
+        attempts["count"] += 1
+        path.write_bytes(b"x" * 100)
+        return path
+
+    monkeypatch.setattr(manager, "_download_file", write_small_file)
+    messages: list[str] = []
+    assert manager.get_or_download("ASIN", notify=messages.append) is None
+    assert attempts["count"] == 2
+    assert any("retrying" in message for message in messages)
+    assert any("file too small" in message for message in messages)

tests/library/test_library_client_extractors.py

@@ -0,0 +1,111 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+from auditui.library import LibraryClient
+
+
+@dataclass(slots=True)
+class MockClient:
+    """Client double that records writes and serves configurable responses."""
+
+    put_calls: list[tuple[str, dict]] = field(default_factory=list)
+    post_calls: list[tuple[str, dict]] = field(default_factory=list)
+    _post_response: dict = field(default_factory=dict)
+    raise_on_put: bool = False
+
+    def put(self, path: str, body: dict) -> dict:
+        """Record put payload or raise when configured."""
+        if self.raise_on_put:
+            raise RuntimeError("put failed")
+        self.put_calls.append((path, body))
+        return {}
+
+    def post(self, path: str, body: dict) -> dict:
+        """Record post payload and return configured response."""
+        self.post_calls.append((path, body))
+        return self._post_response
+
+    def get(self, path: str, **kwargs: dict) -> dict:
+        """Return empty data for extractor-focused tests."""
+        del path, kwargs
+        return {}
+
+
+def build_item(
+    *,
+    title: str | None = None,
+    product_title: str | None = None,
+    authors: list[dict] | None = None,
+    runtime_min: int | None = None,
+    listening_status: dict | None = None,
+    percent_complete: int | float | None = None,
+    asin: str | None = None,
+) -> dict:
+    """Construct synthetic library items for extractor and finish tests."""
+    item: dict = {}
+    if title is not None:
+        item["title"] = title
+    if percent_complete is not None:
+        item["percent_complete"] = percent_complete
+    if listening_status is not None:
+        item["listening_status"] = listening_status
+    if asin is not None:
+        item["asin"] = asin
+    product: dict = {}
+    if product_title is not None:
+        product["title"] = product_title
+    if runtime_min is not None:
+        product["runtime_length"] = {"min": runtime_min}
+    if authors is not None:
+        product["authors"] = authors
+    if asin is not None:
+        product["asin"] = asin
+    if product:
+        item["product"] = product
+    if runtime_min is not None:
+        item["runtime_length_min"] = runtime_min
+    return item
+
+
+def test_extract_title_prefers_product_title() -> None:
+    """Ensure product title has precedence over outer item title."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    assert (
+        library.extract_title(build_item(title="Outer", product_title="Inner"))
+        == "Inner"
+    )
+
+
+def test_extract_title_falls_back_to_asin() -> None:
+    """Ensure title fallback uses product ASIN when no title exists."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    assert library.extract_title({"product": {"asin": "A1"}}) == "A1"
+
+
+def test_extract_authors_joins_names() -> None:
+    """Ensure author dictionaries are converted to a readable list."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    item = build_item(authors=[{"name": "A"}, {"name": "B"}])
+    assert library.extract_authors(item) == "A, B"
+
+
+def test_extract_runtime_minutes_handles_dict_and_number() -> None:
+    """Ensure runtime extraction supports dict and numeric payloads."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    assert library.extract_runtime_minutes(build_item(runtime_min=12)) == 12
+    assert library.extract_runtime_minutes({"runtime_length": 42}) == 42
+
+
+def test_extract_progress_info_prefers_listening_status_when_needed() -> None:
+    """Ensure progress can be sourced from listening_status when top-level is absent."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    item = build_item(listening_status={"percent_complete": 25.0})
+    assert library.extract_progress_info(item) == 25.0
+
+
+def test_extract_asin_prefers_item_then_product() -> None:
+    """Ensure ASIN extraction works from both item and product fields."""
+    library = LibraryClient(MockClient())  # type: ignore[arg-type]
+    assert library.extract_asin(build_item(asin="ASIN1")) == "ASIN1"
+    assert library.extract_asin({"product": {"asin": "ASIN2"}}) == "ASIN2"

tests/library/test_library_client_progress_updates.py

@@ -0,0 +1,103 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+from auditui.library import LibraryClient
+
+
+@dataclass(slots=True)
+class ProgressClient:
+    """Client double for position and finished-state API methods."""
+
+    get_responses: dict[str, dict] = field(default_factory=dict)
+    put_calls: list[tuple[str, dict]] = field(default_factory=list)
+    post_response: dict = field(default_factory=dict)
+    fail_put: bool = False
+
+    def get(self, path: str, **kwargs: object) -> dict:
+        """Return preconfigured payloads by API path."""
+        del kwargs
+        return self.get_responses.get(path, {})
+
+    def put(self, path: str, body: dict) -> dict:
+        """Record payloads or raise to exercise error handling."""
+        if self.fail_put:
+            raise OSError("write failed")
+        self.put_calls.append((path, body))
+        return {}
+
+    def post(self, path: str, body: dict) -> dict:
+        """Return licenserequest response for ACR extraction."""
+        del path, body
+        return self.post_response
+
+
+def test_is_finished_true_from_percent_complete() -> None:
+    """Ensure 100 percent completion is treated as finished."""
+    library = LibraryClient(ProgressClient())  # type: ignore[arg-type]
+    assert library.is_finished({"percent_complete": 100}) is True
+
+
+def test_get_last_position_reads_matching_annotation() -> None:
+    """Ensure last position is read in seconds from matching annotation."""
+    client = ProgressClient(
+        get_responses={
+            "1.0/annotations/lastpositions": {
+                "asin_last_position_heard_annots": [
+                    {"asin": "X", "last_position_heard": {"position_ms": 9000}}
+                ]
+            }
+        }
+    )
+    library = LibraryClient(client)  # type: ignore[arg-type]
+    assert library.get_last_position("X") == 9.0
+
+
+def test_get_last_position_returns_none_for_missing_state() -> None:
+    """Ensure DoesNotExist status is surfaced as no saved position."""
+    client = ProgressClient(
+        get_responses={
+            "1.0/annotations/lastpositions": {
+                "asin_last_position_heard_annots": [
+                    {"asin": "X", "last_position_heard": {"status": "DoesNotExist"}}
+                ]
+            }
+        }
+    )
+    library = LibraryClient(client)  # type: ignore[arg-type]
+    assert library.get_last_position("X") is None
+
+
+def test_save_last_position_validates_non_positive_values() -> None:
+    """Ensure save_last_position short-circuits on non-positive input."""
+    library = LibraryClient(ProgressClient())  # type: ignore[arg-type]
+    assert library.save_last_position("A", 0) is False
+
+
+def test_update_position_writes_version_when_available() -> None:
+    """Ensure version is included in payload when metadata provides it."""
+    client = ProgressClient(
+        get_responses={
+            "1.0/content/A/metadata": {
+                "content_metadata": {
+                    "content_reference": {"acr": "token", "version": "2"}
+                }
+            }
+        }
+    )
+    library = LibraryClient(client)  # type: ignore[arg-type]
+    assert library._update_position("A", 5.5) is True
+    path, body = client.put_calls[0]
+    assert path == "1.0/lastpositions/A"
+    assert body["position_ms"] == 5500
+    assert body["version"] == "2"
+
+
+def test_mark_as_finished_updates_item_in_place() -> None:
+    """Ensure successful finish update mutates local item flags."""
+    client = ProgressClient(post_response={"content_license": {"acr": "token"}})
+    library = LibraryClient(client)  # type: ignore[arg-type]
+    item = {"runtime_length_min": 1, "listening_status": {}}
+    assert library.mark_as_finished("ASIN", item) is True
+    assert item["is_finished"] is True
+    assert item["listening_status"]["is_finished"] is True

tests/library/test_library_search_filters.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from auditui.library import build_search_text, filter_items
+
+
+class SearchLibrary:
+    """Simple search extraction adapter for build_search_text tests."""
+
+    def extract_title(self, item: dict) -> str:
+        """Return a title value from a synthetic item."""
+        return item.get("t", "")
+
+    def extract_authors(self, item: dict) -> str:
+        """Return an author value from a synthetic item."""
+        return item.get("a", "")
+
+
+def test_build_search_text_uses_library_client_when_present() -> None:
+    """Ensure search text delegates to library extractor methods."""
+    item = {"t": "The Book", "a": "The Author"}
+    assert build_search_text(item, SearchLibrary()) == "the book the author"
+
+
+def test_filter_items_returns_input_when_filter_empty() -> None:
+    """Ensure empty filter bypasses per-item search callback evaluation."""
+    items = [{"k": 1}, {"k": 2}]
+    assert filter_items(items, "", lambda _item: "ignored") == items
+
+
+def test_filter_items_matches_case_insensitively() -> None:
+    """Ensure search matching is case-insensitive across computed text."""
+    items = [{"name": "Alpha"}, {"name": "Beta"}]
+    result = filter_items(items, "BETA", lambda item: item["name"].lower())
+    assert result == [items[1]]

tests/library/test_library_table_formatting.py

@@ -0,0 +1,99 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, cast
+
+from auditui.constants import AUTHOR_NAME_MAX_LENGTH
+from auditui.library import (
+    create_progress_sort_key,
+    create_title_sort_key,
+    filter_unfinished_items,
+    format_item_as_row,
+    truncate_author_name,
+)
+
+
+class StubLibrary:
+    """Library facade exposing only helpers needed by table formatting code."""
+
+    def extract_title(self, item: dict) -> str:
+        """Return synthetic title value."""
+        return item.get("title", "")
+
+    def extract_authors(self, item: dict) -> str:
+        """Return synthetic authors value."""
+        return item.get("authors", "")
+
+    def extract_runtime_minutes(self, item: dict) -> int | None:
+        """Return synthetic minute duration."""
+        return item.get("minutes")
+
+    def format_duration(
+        self, value: int | None, unit: str = "minutes", default_none: str | None = None
+    ) -> str | None:
+        """Render runtime in compact minute format for tests."""
+        del unit
+        return default_none if value is None else f"{value}m"
+
+    def extract_progress_info(self, item: dict) -> float | None:
+        """Return synthetic progress percentage value."""
+        return item.get("percent")
+
+    def extract_asin(self, item: dict) -> str | None:
+        """Return synthetic ASIN value."""
+        return item.get("asin")
+
+    def is_finished(self, item: dict) -> bool:
+        """Return synthetic finished flag from the item."""
+        return bool(item.get("finished"))
+
+
+@dataclass(slots=True)
+class StubDownloads:
+    """Download cache adapter exposing just is_cached."""
+
+    cached: set[str]
+
+    def is_cached(self, asin: str) -> bool:
+        """Return whether an ASIN is cached."""
+        return asin in self.cached
+
+
+def test_create_title_sort_key_normalizes_accents() -> None:
+    """Ensure title sorting removes accents before case-fold compare."""
+    key_fn, _ = create_title_sort_key()
+    assert key_fn(["Ecole"]) == key_fn(["École"])
+
+
+def test_create_progress_sort_key_parses_percent_strings() -> None:
+    """Ensure progress sorting converts percentages and handles invalid values."""
+    key_fn, _ = create_progress_sort_key()
+    assert key_fn(["0", "0", "0", "42.5%", ""]) == 42.5
+    assert key_fn(["0", "0", "0", "bad", ""]) == 0.0
+
+
+def test_truncate_author_name_clamps_long_values() -> None:
+    """Ensure very long author strings are shortened with ellipsis."""
+    long_name = "A" * (AUTHOR_NAME_MAX_LENGTH + 5)
+    out = truncate_author_name(long_name)
+    assert out.endswith("...")
+    assert len(out) <= AUTHOR_NAME_MAX_LENGTH
+
+
+def test_format_item_as_row_marks_downloaded_titles() -> None:
+    """Ensure downloaded ASINs are shown with a checkmark in table rows."""
+    item = {
+        "title": "Title",
+        "authors": "Author",
+        "minutes": 90,
+        "percent": 12.34,
+        "asin": "A1",
+    }
+    row = format_item_as_row(item, StubLibrary(), cast(Any, StubDownloads({"A1"})))
+    assert row == ("Title", "Author", "90m", "12.3%", "✓")
+
+
+def test_filter_unfinished_items_keeps_only_incomplete() -> None:
+    """Ensure unfinished filter excludes items marked as finished."""
+    items = [{"id": 1, "finished": False}, {"id": 2, "finished": True}]
+    assert filter_unfinished_items(items, StubLibrary()) == [items[0]]

tests/playback/test_playback_chapter_selection.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from auditui.playback.chapters import get_current_chapter, get_current_chapter_index
+
+
+CHAPTERS = [
+    {"title": "One", "start_time": 0.0, "end_time": 60.0},
+    {"title": "Two", "start_time": 60.0, "end_time": 120.0},
+]
+
+
+def test_get_current_chapter_handles_empty_chapter_list() -> None:
+    """Ensure empty chapter metadata still returns a sensible fallback row."""
+    assert get_current_chapter(12.0, [], 300.0) == ("Unknown Chapter", 12.0, 300.0)
+
+
+def test_get_current_chapter_returns_matching_chapter_window() -> None:
+    """Ensure chapter selection returns title and chapter-relative timing."""
+    assert get_current_chapter(75.0, CHAPTERS, 120.0) == ("Two", 15.0, 60.0)
+
+
+def test_get_current_chapter_falls_back_to_last_chapter() -> None:
+    """Ensure elapsed values past known ranges map to last chapter."""
+    assert get_current_chapter(150.0, CHAPTERS, 200.0) == ("Two", 90.0, 60.0)
+
+
+def test_get_current_chapter_index_returns_none_without_chapters() -> None:
+    """Ensure chapter index lookup returns None when no chapters exist."""
+    assert get_current_chapter_index(10.0, []) is None
+
+
+def test_get_current_chapter_index_returns_last_when_past_end() -> None:
+    """Ensure chapter index lookup falls back to the final chapter index."""
+    assert get_current_chapter_index(200.0, CHAPTERS) == 1

tests/playback/test_playback_controller_lifecycle_mixin.py

@@ -0,0 +1,129 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any, cast
+
+from auditui.playback import controller_lifecycle as lifecycle_mod
+from auditui.playback.controller import PlaybackController
+
+
+class Proc:
+    """Process shim used for lifecycle tests."""
+
+    def __init__(self, poll_value=None) -> None:
+        """Set initial poll result."""
+        self._poll_value = poll_value
+
+    def poll(self):
+        """Return process running status."""
+        return self._poll_value
+
+
+def _controller() -> tuple[PlaybackController, list[str]]:
+    """Build controller and message capture list."""
+    messages: list[str] = []
+    return PlaybackController(messages.append, None), messages
+
+
+def test_start_reports_missing_ffplay(monkeypatch) -> None:
+    """Ensure start fails fast when ffplay is unavailable."""
+    controller, messages = _controller()
+    monkeypatch.setattr(lifecycle_mod.process_mod, "is_ffplay_available", lambda: False)
+    assert controller.start(Path("book.aax")) is False
+    assert messages[-1] == "ffplay not found. Please install ffmpeg"
+
+
+def test_start_sets_state_on_success(monkeypatch) -> None:
+    """Ensure successful start initializes playback state and metadata."""
+    controller, messages = _controller()
+    monkeypatch.setattr(lifecycle_mod.process_mod, "is_ffplay_available", lambda: True)
+    monkeypatch.setattr(
+        lifecycle_mod.process_mod, "build_ffplay_cmd", lambda *args: ["ffplay"]
+    )
+    monkeypatch.setattr(
+        lifecycle_mod.process_mod, "run_ffplay", lambda cmd: (Proc(None), None)
+    )
+    monkeypatch.setattr(
+        lifecycle_mod,
+        "load_media_info",
+        lambda path, activation: (600.0, [{"title": "ch"}]),
+    )
+    monkeypatch.setattr(lifecycle_mod.time, "time", lambda: 100.0)
+    ok = controller.start(
+        Path("book.aax"), activation_hex="abcd", start_position=10.0, speed=1.2
+    )
+    assert ok is True
+    assert controller.is_playing is True
+    assert controller.current_file_path == Path("book.aax")
+    assert controller.total_duration == 600.0
+    assert messages[-1] == "Playing: book.aax"
+
+
+def test_prepare_and_start_uses_last_position(monkeypatch) -> None:
+    """Ensure prepare flow resumes from saved position when available."""
+    messages: list[str] = []
+    lib = type("Lib", (), {"get_last_position": lambda self, asin: 75.0})()
+    controller = PlaybackController(messages.append, cast(Any, lib))
+    started: list[tuple] = []
+
+    class DM:
+        """Download manager shim returning path and activation token."""
+
+        def get_or_download(
+            self,
+            asin,
+            notify,
+            preferred_title: str | None = None,
+            preferred_author: str | None = None,
+        ):
+            """Return deterministic downloaded file path."""
+            del asin, notify, preferred_title, preferred_author
+            return Path("book.aax")
+
+        def get_activation_bytes(self):
+            """Return deterministic activation token."""
+            return "abcd"
+
+    monkeypatch.setattr(controller, "start", lambda *args: started.append(args) or True)
+    monkeypatch.setattr(lifecycle_mod.time, "time", lambda: 200.0)
+    assert controller.prepare_and_start(cast(Any, DM()), "ASIN") is True
+    assert started and started[0][3] == 75.0
+    assert "Resuming from 01:15" in messages
+
+
+def test_toggle_playback_uses_pause_and_resume_paths(monkeypatch) -> None:
+    """Ensure toggle dispatches pause or resume based on paused flag."""
+    controller, _ = _controller()
+    controller.is_playing = True
+    controller.playback_process = cast(Any, Proc(None))
+    called: list[str] = []
+    monkeypatch.setattr(controller, "pause", lambda: called.append("pause"))
+    monkeypatch.setattr(controller, "resume", lambda: called.append("resume"))
+    controller.is_paused = False
+    assert controller.toggle_playback() is True
+    controller.is_paused = True
+    assert controller.toggle_playback() is True
+    assert called == ["pause", "resume"]
+
+
+def test_restart_at_position_restores_state_and_notifies(monkeypatch) -> None:
+    """Ensure restart logic preserves metadata and emits custom message."""
+    controller, messages = _controller()
+    controller.is_playing = True
+    controller.is_paused = True
+    controller.current_file_path = Path("book.aax")
+    controller.current_asin = "ASIN"
+    controller.activation_hex = "abcd"
+    controller.total_duration = 400.0
+    controller.chapters = [{"title": "One"}]
+    controller.playback_speed = 1.0
+    monkeypatch.setattr(controller, "_stop_process", lambda: None)
+    monkeypatch.setattr(lifecycle_mod.time, "sleep", lambda _s: None)
+    monkeypatch.setattr(controller, "start", lambda *args: True)
+    paused: list[str] = []
+    monkeypatch.setattr(controller, "pause", lambda: paused.append("pause"))
+    assert controller._restart_at_position(120.0, message="Jumped") is True
+    assert controller.current_asin == "ASIN"
+    assert controller.chapters == [{"title": "One"}]
+    assert paused == ["pause"]
+    assert messages[-1] == "Jumped"

tests/playback/test_playback_controller_seek_speed_mixin.py

@@ -0,0 +1,100 @@
+from __future__ import annotations
+
+from auditui.playback import controller_seek_speed as seek_speed_mod
+from auditui.playback.controller import PlaybackController
+
+
+def _controller() -> tuple[PlaybackController, list[str]]:
+    """Build controller and in-memory notification sink."""
+    messages: list[str] = []
+    return PlaybackController(messages.append, None), messages
+
+
+def test_seek_notifies_when_target_invalid(monkeypatch) -> None:
+    """Ensure seek reports end-of-file condition when target is invalid."""
+    controller, messages = _controller()
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 20.0)
+    controller.seek_offset = 100.0
+    controller.total_duration = 120.0
+    monkeypatch.setattr(
+        seek_speed_mod.seek_mod, "compute_seek_target", lambda *args: None
+    )
+    assert controller._seek(30.0, "forward") is False
+    assert messages[-1] == "Already at end of file"
+
+
+def test_seek_to_chapter_reports_bounds(monkeypatch) -> None:
+    """Ensure chapter seek reports first and last chapter boundaries."""
+    controller, messages = _controller()
+    controller.is_playing = True
+    controller.current_file_path = object()
+    controller.chapters = [{"title": "One", "start_time": 0.0, "end_time": 10.0}]
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 1.0)
+    monkeypatch.setattr(
+        seek_speed_mod.chapters_mod,
+        "get_current_chapter_index",
+        lambda elapsed, chapters: 0,
+    )
+    assert controller.seek_to_chapter("next") is False
+    assert messages[-1] == "Already at last chapter"
+    assert controller.seek_to_chapter("previous") is False
+    assert messages[-1] == "Already at first chapter"
+
+
+def test_save_current_position_writes_positive_values() -> None:
+    """Ensure save_current_position persists elapsed time via library client."""
+    calls: list[tuple[str, float]] = []
+    library = type(
+        "Library",
+        (),
+        {"save_last_position": lambda self, asin, pos: calls.append((asin, pos))},
+    )()
+    controller = PlaybackController(lambda _msg: None, library)
+    controller.current_asin = "ASIN"
+    controller.is_playing = True
+    controller.playback_start_time = 1.0
+    controller.seek_offset = 10.0
+    controller._get_current_elapsed = lambda: 15.0
+    controller._save_current_position()
+    assert calls == [("ASIN", 25.0)]
+
+
+def test_update_position_if_needed_honors_interval(monkeypatch) -> None:
+    """Ensure periodic save runs only when interval has elapsed."""
+    controller, _ = _controller()
+    controller.is_playing = True
+    controller.current_asin = "ASIN"
+    controller.library_client = object()
+    controller.last_save_time = 10.0
+    controller.position_save_interval = 30.0
+    saves: list[str] = []
+    monkeypatch.setattr(
+        controller, "_save_current_position", lambda: saves.append("save")
+    )
+    monkeypatch.setattr(seek_speed_mod.time, "time", lambda: 20.0)
+    controller.update_position_if_needed()
+    monkeypatch.setattr(seek_speed_mod.time, "time", lambda: 45.0)
+    controller.update_position_if_needed()
+    assert saves == ["save"]
+
+
+def test_change_speed_restarts_with_new_rate(monkeypatch) -> None:
+    """Ensure speed changes restart playback at current position."""
+    controller, _ = _controller()
+    controller.playback_speed = 1.0
+    controller.seek_offset = 5.0
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 10.0)
+    seen: list[tuple[float, float, str]] = []
+
+    def fake_restart(
+        position: float, speed: float | None = None, message: str | None = None
+    ) -> bool:
+        """Capture restart call parameters."""
+        seen.append((position, speed or 0.0, message or ""))
+        return True
+
+    monkeypatch.setattr(controller, "_restart_at_position", fake_restart)
+    assert controller.increase_speed() is True
+    assert seen and seen[0][0] == 15.0
+    assert seen[0][1] > 1.0
+    assert seen[0][2].startswith("Speed: ")

tests/playback/test_playback_controller_state_mixin.py

@@ -0,0 +1,76 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any, cast
+
+from auditui.playback import controller_state as state_mod
+from auditui.playback.controller import PlaybackController
+
+
+class Proc:
+    """Simple process shim exposing poll and pid for state tests."""
+
+    def __init__(self, poll_value=None) -> None:
+        """Store poll return value and fake pid."""
+        self._poll_value = poll_value
+        self.pid = 123
+
+    def poll(self):
+        """Return configured process status code or None."""
+        return self._poll_value
+
+
+def _controller() -> tuple[PlaybackController, list[str]]:
+    """Build playback controller and collected notifications list."""
+    messages: list[str] = []
+    return PlaybackController(messages.append, None), messages
+
+
+def test_get_current_elapsed_rolls_pause_into_duration(monkeypatch) -> None:
+    """Ensure elapsed helper absorbs stale pause_start_time when resumed."""
+    controller, _ = _controller()
+    controller.pause_start_time = 100.0
+    controller.is_paused = False
+    monkeypatch.setattr(state_mod.time, "time", lambda: 120.0)
+    monkeypatch.setattr(state_mod.elapsed_mod, "get_elapsed", lambda *args: 50.0)
+    assert controller._get_current_elapsed() == 50.0
+    assert controller.paused_duration == 20.0
+    assert controller.pause_start_time is None
+
+
+def test_validate_playback_state_stops_when_process_ended() -> None:
+    """Ensure state validation stops and reports when process is gone."""
+    controller, messages = _controller()
+    controller.playback_process = cast(Any, Proc(poll_value=1))
+    controller.is_playing = True
+    controller.current_file_path = Path("book.aax")
+    ok = controller._validate_playback_state(require_paused=False)
+    assert ok is False
+    assert messages[-1] == "Playback process has ended"
+
+
+def test_send_signal_sets_paused_state_and_notifies(monkeypatch) -> None:
+    """Ensure SIGSTOP updates paused state and includes filename in status."""
+    controller, messages = _controller()
+    controller.playback_process = cast(Any, Proc())
+    controller.current_file_path = Path("book.aax")
+    monkeypatch.setattr(state_mod.process_mod, "send_signal", lambda proc, sig: None)
+    controller._send_signal(state_mod.signal.SIGSTOP, "Paused", "pause")
+    assert controller.is_paused is True
+    assert messages[-1] == "Paused: book.aax"
+
+
+def test_send_signal_handles_process_lookup(monkeypatch) -> None:
+    """Ensure missing process lookup errors are handled with user-facing message."""
+    controller, messages = _controller()
+    controller.playback_process = cast(Any, Proc())
+
+    def raise_lookup(proc, sig):
+        """Raise process lookup error to exercise exception path."""
+        del proc, sig
+        raise ProcessLookupError("gone")
+
+    monkeypatch.setattr(state_mod.process_mod, "send_signal", raise_lookup)
+    monkeypatch.setattr(state_mod.process_mod, "terminate_process", lambda proc: None)
+    controller._send_signal(state_mod.signal.SIGCONT, "Playing", "resume")
+    assert messages[-1] == "Process no longer exists"

tests/playback/test_playback_elapsed_math.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from auditui.playback.elapsed import get_elapsed
+from auditui.playback import elapsed as elapsed_mod
+
+
+def test_get_elapsed_returns_zero_without_start_time() -> None:
+    """Ensure elapsed computation returns zero when playback has not started."""
+    assert get_elapsed(None, None, 0.0, False) == 0.0
+
+
+def test_get_elapsed_while_paused_uses_pause_start(monkeypatch) -> None:
+    """Ensure paused elapsed is fixed at pause_start minus previous pauses."""
+    monkeypatch.setattr(elapsed_mod.time, "time", lambda: 500.0)
+    assert get_elapsed(100.0, 250.0, 20.0, True) == 130.0
+
+
+def test_get_elapsed_subtracts_pause_duration_when_resumed(monkeypatch) -> None:
+    """Ensure resumed elapsed removes newly accumulated paused duration."""
+    monkeypatch.setattr(elapsed_mod.time, "time", lambda: 400.0)
+    assert get_elapsed(100.0, 300.0, 10.0, False) == 190.0

tests/playback/test_playback_process_helpers.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+import subprocess
+from pathlib import Path
+
+from auditui.playback import process as process_mod
+
+
+class DummyProc:
+    """Minimal subprocess-like object for terminate_process tests."""
+
+    def __init__(self, alive: bool = True) -> None:
+        """Initialize process state and bookkeeping flags."""
+        self._alive = alive
+        self.terminated = False
+        self.killed = False
+        self.pid = 123
+
+    def poll(self) -> int | None:
+        """Return None while process is alive and 0 when stopped."""
+        return None if self._alive else 0
+
+    def terminate(self) -> None:
+        """Mark process as terminated and no longer alive."""
+        self.terminated = True
+        self._alive = False
+
+    def wait(self, timeout: float | None = None) -> int:
+        """Return immediately to emulate a cooperative shutdown."""
+        del timeout
+        return 0
+
+    def kill(self) -> None:
+        """Mark process as killed and no longer alive."""
+        self.killed = True
+        self._alive = False
+
+
+def test_build_ffplay_cmd_includes_activation_seek_and_speed() -> None:
+    """Ensure ffplay command includes optional playback arguments when set."""
+    cmd = process_mod.build_ffplay_cmd(Path("book.aax"), "abcd", 12.5, 1.2)
+    assert "-activation_bytes" in cmd
+    assert "-ss" in cmd
+    assert "atempo=1.20" in " ".join(cmd)
+
+
+def test_terminate_process_handles_alive_process() -> None:
+    """Ensure terminate_process gracefully shuts down a running process."""
+    proc = DummyProc(alive=True)
+    process_mod.terminate_process(proc)  # type: ignore[arg-type]
+    assert proc.terminated is True
+
+
+def test_run_ffplay_returns_none_when_unavailable(monkeypatch) -> None:
+    """Ensure ffplay launch exits early when binary is not on PATH."""
+    monkeypatch.setattr(process_mod, "is_ffplay_available", lambda: False)
+    assert process_mod.run_ffplay(["ffplay", "book.aax"]) == (None, None)
+
+
+def test_send_signal_delegates_to_os_kill(monkeypatch) -> None:
+    """Ensure send_signal forwards process PID and signal to os.kill."""
+    seen: list[tuple[int, object]] = []
+    monkeypatch.setattr(
+        process_mod.os, "kill", lambda pid, sig: seen.append((pid, sig))
+    )
+    process_mod.send_signal(DummyProc(), process_mod.signal.SIGSTOP)  # type: ignore[arg-type]
+    assert seen and seen[0][0] == 123

tests/playback/test_playback_seek_targets.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from auditui.playback.seek import compute_seek_target
+
+
+def test_forward_seek_returns_new_position_and_message() -> None:
+    """Ensure forward seek computes expected position and status message."""
+    target = compute_seek_target(10.0, 100.0, 30.0, "forward")
+    assert target == (40.0, "Skipped forward 30s")
+
+
+def test_forward_seek_returns_none_near_end() -> None:
+    """Ensure seeking too close to end returns an invalid seek result."""
+    assert compute_seek_target(95.0, 100.0, 10.0, "forward") is None
+
+
+def test_backward_seek_clamps_to_zero() -> None:
+    """Ensure backward seek cannot go below zero."""
+    target = compute_seek_target(5.0, None, 30.0, "backward")
+    assert target == (0.0, "Skipped backward 30s")

tests/stats/test_stats_account_data.py

@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+from auditui.stats.account import (
+    get_account_info,
+    get_country,
+    get_subscription_details,
+)
+
+
+class AccountClient:
+    """Minimal API client returning endpoint-specific account responses."""
+
+    def __init__(self, responses: dict[str, dict]) -> None:
+        """Store endpoint response map for deterministic tests."""
+        self._responses = responses
+
+    def get(self, path: str, **kwargs: object) -> dict:
+        """Return configured response and ignore query parameters."""
+        del kwargs
+        return self._responses.get(path, {})
+
+
+def test_get_account_info_merges_multiple_endpoints() -> None:
+    """Ensure account info aggregator combines endpoint payload dictionaries."""
+    client = AccountClient(
+        {
+            "1.0/account/information": {"a": 1},
+            "1.0/customer/information": {"b": 2},
+            "1.0/customer/status": {"c": 3},
+        }
+    )
+    assert get_account_info(client) == {"a": 1, "b": 2, "c": 3}
+
+
+def test_get_subscription_details_uses_known_nested_paths() -> None:
+    """Ensure first valid subscription_details list entry is returned."""
+    info = {
+        "customer_details": {
+            "subscription": {"subscription_details": [{"name": "Plan"}]}
+        }
+    }
+    assert get_subscription_details(info) == {"name": "Plan"}
+
+
+def test_get_country_supports_locale_variants() -> None:
+    """Ensure country extraction supports object, domain, and locale string forms."""
+    auth_country_code = type(
+        "Auth", (), {"locale": type("Loc", (), {"country_code": "us"})()}
+    )()
+    auth_domain = type("Auth", (), {"locale": type("Loc", (), {"domain": "fr"})()})()
+    auth_string = type("Auth", (), {"locale": "en_gb"})()
+    assert get_country(auth_country_code) == "US"
+    assert get_country(auth_domain) == "FR"
+    assert get_country(auth_string) == "GB"

tests/stats/test_stats_aggregator_output.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+from datetime import date
+
+from auditui.stats.aggregator import StatsAggregator
+from auditui.stats import aggregator as aggregator_mod
+
+
+def test_get_stats_returns_empty_without_client() -> None:
+    """Ensure stats aggregation short-circuits when API client is absent."""
+    aggregator = StatsAggregator(
+        client=None, auth=None, library_client=None, all_items=[]
+    )
+    assert aggregator.get_stats() == []
+
+
+def test_get_stats_builds_expected_rows(monkeypatch) -> None:
+    """Ensure aggregator assembles rows from listening, account, and email sources."""
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod, "get_signup_year", lambda _client: 2015
+    )
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod,
+        "get_listening_time",
+        lambda _client, duration, start_date: 120_000 if duration == 1 else 3_600_000,
+    )
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod, "get_finished_books_count", lambda _lc, _items: 7
+    )
+    monkeypatch.setattr(
+        aggregator_mod.email_mod,
+        "resolve_email",
+        lambda *args, **kwargs: "user@example.com",
+    )
+    monkeypatch.setattr(aggregator_mod.account_mod, "get_country", lambda _auth: "US")
+    monkeypatch.setattr(
+        aggregator_mod.account_mod,
+        "get_account_info",
+        lambda _client: {
+            "subscription_details": [
+                {
+                    "name": "Premium",
+                    "next_bill_date": "2026-02-01T00:00:00Z",
+                    "next_bill_amount": {
+                        "currency_value": "14.95",
+                        "currency_code": "USD",
+                    },
+                }
+            ]
+        },
+    )
+
+    aggregator = StatsAggregator(
+        client=object(),
+        auth=object(),
+        library_client=object(),
+        all_items=[{}, {}, {}],
+    )
+    stats = dict(aggregator.get_stats(today=date(2026, 2, 1)))
+    assert stats["Email"] == "user@example.com"
+    assert stats["Country Store"] == "US"
+    assert stats["Signup Year"] == "2015"
+    assert stats["Subscription"] == "Premium"
+    assert stats["Price"] == "14.95 USD"
+    assert stats["This Month"] == "2m"
+    assert stats["This Year"] == "1h00"
+    assert stats["Books Finished"] == "7 / 3"

tests/stats/test_stats_email_resolution.py

@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from auditui.stats.email import (
+    find_email_in_data,
+    first_email,
+    get_email_from_account_info,
+    get_email_from_auth,
+    get_email_from_auth_file,
+    get_email_from_config,
+    resolve_email,
+)
+
+
+def test_find_email_in_nested_data() -> None:
+    """Ensure nested structures are scanned until a plausible email is found."""
+    data = {"a": {"b": ["nope", "user@example.com"]}}
+    assert find_email_in_data(data) == "user@example.com"
+
+
+def test_first_email_skips_unknown_and_none() -> None:
+    """Ensure first_email ignores empty and Unknown sentinel values."""
+    assert first_email(None, "Unknown", "ok@example.com") == "ok@example.com"
+
+
+def test_get_email_from_config_and_auth_file(tmp_path: Path) -> None:
+    """Ensure config and auth-file readers extract valid email fields."""
+    config_path = tmp_path / "config.json"
+    auth_path = tmp_path / "auth.json"
+    config_path.write_text(
+        json.dumps({"email": "config@example.com"}), encoding="utf-8"
+    )
+    auth_path.write_text(json.dumps({"email": "auth@example.com"}), encoding="utf-8")
+    assert get_email_from_config(config_path) == "config@example.com"
+    assert get_email_from_auth_file(auth_path) == "auth@example.com"
+
+
+def test_get_email_from_auth_prefers_username() -> None:
+    """Ensure auth object attributes are checked in expected precedence order."""
+    auth = type(
+        "Auth", (), {"username": "user@example.com", "login": None, "email": None}
+    )()
+    assert get_email_from_auth(auth) == "user@example.com"
+
+
+def test_get_email_from_account_info_supports_nested_customer_info() -> None:
+    """Ensure account email can be discovered in nested customer_info payload."""
+    info = {"customer_info": {"primary_email": "nested@example.com"}}
+    assert get_email_from_account_info(info) == "nested@example.com"
+
+
+def test_resolve_email_falls_back_to_account_getter(tmp_path: Path) -> None:
+    """Ensure resolve_email checks account-info callback when local sources miss."""
+    auth = object()
+    value = resolve_email(
+        auth,
+        client=object(),
+        config_path=tmp_path / "missing-config.json",
+        auth_path=tmp_path / "missing-auth.json",
+        get_account_info=lambda: {"customer_email": "account@example.com"},
+    )
+    assert value == "account@example.com"

tests/stats/test_stats_formatting.py

@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from auditui.stats.format import format_date, format_time
+
+
+def test_format_time_handles_minutes_and_hours() -> None:
+    """Ensure format_time outputs minute-only and hour-minute formats."""
+    assert format_time(90_000) == "1m"
+    assert format_time(3_660_000) == "1h01"
+
+
+def test_format_date_handles_iso_and_invalid_values() -> None:
+    """Ensure format_date normalizes ISO timestamps and preserves invalid input."""
+    assert format_date("2026-01-15T10:20:30Z") == "2026-01-15"
+    assert format_date("not-a-date") == "not-a-date"
+    assert format_date(None) == "Unknown"

tests/stats/test_stats_listening_metrics.py

@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+from auditui.stats.listening import (
+    get_finished_books_count,
+    get_listening_time,
+    get_signup_year,
+    has_activity,
+)
+
+
+class StatsClient:
+    """Client double for monthly aggregate lookups keyed by start date."""
+
+    def __init__(self, sums_by_start_date: dict[str, list[int]]) -> None:
+        """Store aggregate sums grouped by monthly_listening_interval_start_date."""
+        self._sums = sums_by_start_date
+
+    def get(self, path: str, **kwargs: str) -> dict:
+        """Return aggregate payload based on requested interval start date."""
+        del path
+        start_date = kwargs["monthly_listening_interval_start_date"]
+        sums = self._sums.get(start_date, [0])
+        return {
+            "aggregated_monthly_listening_stats": [{"aggregated_sum": s} for s in sums]
+        }
+
+
+def test_has_activity_detects_non_zero_months() -> None:
+    """Ensure activity helper returns true when any month has positive sum."""
+    assert (
+        has_activity(
+            {
+                "aggregated_monthly_listening_stats": [
+                    {"aggregated_sum": 0},
+                    {"aggregated_sum": 1},
+                ]
+            }
+        )
+        is True
+    )
+
+
+def test_get_listening_time_sums_aggregated_months() -> None:
+    """Ensure monthly aggregate sums are added into one listening total."""
+    client = StatsClient({"2026-01": [1000, 2000, 3000]})
+    assert get_listening_time(client, duration=1, start_date="2026-01") == 6000
+
+
+def test_get_signup_year_returns_earliest_year_with_activity() -> None:
+    """Ensure signup year search finds first active year via binary search."""
+    client = StatsClient(
+        {"2026-01": [1], "2010-01": [1], "2002-01": [1], "2001-01": [0]}
+    )
+    year = get_signup_year(client)
+    assert year <= 2010
+
+
+def test_get_finished_books_count_uses_library_is_finished() -> None:
+    """Ensure finished books count delegates to library client predicate."""
+    library_client = type(
+        "Library", (), {"is_finished": lambda self, item: item.get("done", False)}
+    )()
+    items = [{"done": True}, {"done": False}, {"done": True}]
+    assert get_finished_books_count(library_client, items) == 2

tests/ui/test_ui_filter_screen_behavior.py

@@ -0,0 +1,62 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Callable, cast
+
+from auditui.ui import FilterScreen
+from textual.widgets import Input
+
+
+@dataclass(slots=True)
+class DummyEvent:
+    """Minimal event object carrying an input value for tests."""
+
+    value: str
+
+
+@dataclass(slots=True)
+class FakeTimer:
+    """Timer substitute recording whether stop() was called."""
+
+    callback: Callable[[], None]
+    stopped: bool = False
+
+    def stop(self) -> None:
+        """Mark timer as stopped."""
+        self.stopped = True
+
+
+def test_filter_debounce_uses_latest_value(monkeypatch) -> None:
+    """Ensure debounce cancels previous timer and emits latest input value."""
+    seen: list[str] = []
+    timers: list[FakeTimer] = []
+
+    def on_change(value: str) -> None:
+        """Capture emitted filter values."""
+        seen.append(value)
+
+    screen = FilterScreen(on_change=on_change, debounce_seconds=0.2)
+
+    def fake_set_timer(_delay: float, callback: Callable[[], None]) -> FakeTimer:
+        """Record timer callbacks instead of scheduling real timers."""
+        timer = FakeTimer(callback)
+        timers.append(timer)
+        return timer
+
+    monkeypatch.setattr(screen, "set_timer", fake_set_timer)
+    screen.on_input_changed(cast(Input.Changed, DummyEvent("a")))
+    screen.on_input_changed(cast(Input.Changed, DummyEvent("ab")))
+    assert len(timers) == 2
+    assert timers[0].stopped is True
+    assert timers[1].stopped is False
+    timers[1].callback()
+    assert seen == ["ab"]
+
+
+def test_on_unmount_stops_pending_timer() -> None:
+    """Ensure screen unmount stops pending debounce timer when present."""
+    screen = FilterScreen(on_change=lambda _value: None)
+    timer = FakeTimer(lambda: None)
+    screen._debounce_timer = timer
+    screen.on_unmount()
+    assert timer.stopped is True

tui-try.py

@@ -1,55 +0,0 @@
-from textual.app import App, ComposeResult
-from textual.widgets import Footer, Header, DataTable
-
-
-class AudituiApp(App):
-    BINDINGS = [
-        ("d", "toggle_dark", "Toggle dark mode"),
-        ("s", "sort", "Sort by title"),
-        ("r", "reverse_sort", "Reverse sort"),
-        ("q", "quit", "Quit application")
-    ]
-
-    def compose(self) -> ComposeResult:
-        yield Header()
-        table = DataTable()
-        table.zebra_stripes = True
-        table.cursor_type = "row"
-        yield table
-        yield Footer()
-
-    def on_mount(self) -> None:
-        table = self.query_one(DataTable)
-        table.add_columns("Title", "Author", "Length", "Progress")
-
-        sample_books = [
-            ("The Great Gatsby", "F. Scott Fitzgerald", "4h 30m", "100%"),
-            ("1984", "George Orwell", "11h 25m", "75%"),
-            ("To Kill a Mockingbird", "Harper Lee", "12h 17m", "50%"),
-            ("Pride and Prejudice", "Jane Austen", "11h 35m", "0%"),
-            ("The Catcher in the Rye", "J.D. Salinger", "7h 20m", "25%"),
-            ("Lord of the Flies", "William Golding", "6h 35m", "100%"),
-            ("Animal Farm", "George Orwell", "3h 15m", "90%"),
-            ("Brave New World", "Aldous Huxley", "10h 45m", "60%"),
-        ]
-
-        for title, author, length, progress in sample_books:
-            table.add_row(title, author, length, progress, key=title)
-
-    def action_toggle_dark(self) -> None:
-        self.theme = (
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