import argparse
import sys
from typing import List

from .format_manifest import format_manifest_command
from .index import index_command
from .update import update_command

from .channel import build_channel_command


def parse_arguments(argv: List[str]) -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        prog=argv[0], description="nur management commands"
    )

    subparsers = parser.add_subparsers(description="subcommands")

    build_channel = subparsers.add_parser("build-channel")
    build_channel.add_argument('directory')
    build_channel.set_defaults(func=build_channel_command)

    format_manifest = subparsers.add_parser("format-manifest")
    format_manifest.set_defaults(func=format_manifest_command)

    update = subparsers.add_parser("update")
    update.set_defaults(func=update_command)

    index = subparsers.add_parser("index")
    index.set_defaults(func=index_command)

    return parser.parse_args(argv[1:])


def main() -> None:
    args = parse_arguments(sys.argv)
    args.func(args)