import argparse
import json
from typing import Optional
from typing import Sequence

from identify import identify


def main(argv: Optional[Sequence[str]] = None) -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument('--filename-only', action='store_true')
    parser.add_argument('path')
    args = parser.parse_args(argv)

    if args.filename_only:
        func = identify.tags_from_filename
    else:
        func = identify.tags_from_path

    try:
        tags = sorted(func(args.path))
    except ValueError as e:
        print(e)
        return 1

    if not tags:
        return 1
    else:
        print(json.dumps(tags))
        return 0


if __name__ == '__main__':
    raise SystemExit(main())
