# This file is part of the Open Parts Database software
# Copyright (C) 2022  Valentin Lorentz
#
# This program is free software: you can redistribute it and/or modify it under the
# terms of the GNU Affero General Public License version 3, as published by the
# Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License along with
# this program.  If not, see <http://www.gnu.org/licenses/>.

"""
CLI entrypoint.
"""

import sys
import typing


def error(msg: str) -> typing.NoReturn:
    """Prints the message on stderr and exits with code 1."""
    print(msg, file=sys.stderr)
    sys.exit(1)


def main() -> None:
    """CLI entrypoint"""
    try:
        (executable, subcommand, *args) = sys.argv
    except ValueError:
        error(f"Syntax: {sys.argv[0]} <subcommand> [<arg1> [<arg2> [...]]]")

    if subcommand == "initdb":
        from opdb.db import Db  # pylint: disable=import-outside-toplevel

        try:
            (dsn,) = args
        except ValueError:
            error(f"Syntax: {executable} initdb <libpq DSN>")

        with Db.open(dsn) as db:
            db.init()
    else:
        error(f"Unknown subcommand: {subcommand}")


if __name__ == "__main__":
    main()