refactor: massive refactor to have only one binary to call

cmd/aoc/main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"advent-of-code/internal/registry"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	_ "advent-of-code/internal/2020/DayFour"
+	_ "advent-of-code/internal/2020/DayOne"
+	_ "advent-of-code/internal/2020/DaySix"
+	_ "advent-of-code/internal/2020/DayThree"
+	_ "advent-of-code/internal/2020/DayTwo"
+	_ "advent-of-code/internal/2021/DayOne"
+	_ "advent-of-code/internal/2021/DayThree"
+	_ "advent-of-code/internal/2021/DayTwo"
+)
+
+func capitalize(day string) string {
+	dayNames := map[string]string{
+		"1": "One", "2": "Two", "3": "Three", "4": "Four", "5": "Five",
+		"6": "Six", "7": "Seven", "8": "Eight", "9": "Nine", "10": "Ten",
+		"11": "Eleven", "12": "Twelve", "13": "Thirteen", "14": "Fourteen", "15": "Fifteen",
+		"16": "Sixteen", "17": "Seventeen", "18": "Eighteen", "19": "Nineteen", "20": "Twenty",
+		"21": "TwentyOne", "22": "TwentyTwo", "23": "TwentyThree", "24": "TwentyFour", "25": "TwentyFive",
+	}
+	return dayNames[day]
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintf(os.Stderr, "Usage: %s <YEAR>D<DAY>[P<PART>]\n", os.Args[0])
+		os.Exit(1)
+	}
+
+	re := regexp.MustCompile(`^(\d{4})D(\d+)(?:P(\d+))?$`)
+	matches := re.FindStringSubmatch(os.Args[1])
+	if matches == nil {
+		fmt.Fprintf(os.Stderr, "Invalid format: %s\n", os.Args[1])
+		os.Exit(1)
+	}
+
+	year, dayNum, part := matches[1], matches[2], matches[3]
+	dayKey := fmt.Sprintf("%sD%s", year, dayNum)
+	dayName := fmt.Sprintf("Day%s", capitalize(dayNum))
+	input := filepath.Join("internal", "data", year, dayName, "input.txt")
+
+	runner, ok := registry.Days[dayKey].(registry.Runner)
+	if !ok {
+		log.Fatalf("Day not found: %s\n", dayKey)
+	}
+
+	runner.Run(input, part)
+}