export interface CliArgs {
  url?: string;
  output: string;
  format: string;
  segments: number;
}

export function parseArgs(): CliArgs {
  const args: CliArgs = {
    output: "./downloads",
    format: "best",
    segments: 1,
  };

  const rawArgs = Bun.argv;
  
  for (let i = 0; i < rawArgs.length; i++) {
    const arg = rawArgs[i];
    const nextArg = rawArgs[i + 1];

    if (arg === "-o" || arg === "--output") {
      args.output = nextArg || "./downloads";
      i++;
    } else if (arg === "-f" || arg === "--format") {
      args.format = nextArg || "best";
      i++;
    } else if (arg === "-n" || arg === "--segments") {
      args.segments = parseInt(nextArg || "1", 10);
      i++;
    } else if (arg === "-h" || arg === "--help") {
      console.log(`YouTube Most Watched Segments Downloader

Usage: yt-segments <url> [options]

Arguments:
  <url>              YouTube video URL (required)

Options:
  -o, --output <dir>    Output directory (default: ./downloads)
  -f, --format <fmt>    Video format (default: best)
  -n, --segments <num>  Number of top segments to download (default: 1)
  -h, --help            Show this help message

Examples:
  yt-segments "https://www.youtube.com/watch?v=abc123"
  yt-segments "https://youtu.be/abc123" -o ./videos -f mp4
  yt-segments "https://www.youtube.com/watch?v=abc123" -n 3
`);
      process.exit(0);
    } else if (!arg.startsWith("-") && !arg.includes("bun")) {
      // This is likely the URL
      if (!arg.startsWith("bun") && !arg.includes("node")) {
        args.url = arg;
      }
    }
  }

  return args;
}