import sys
import asyncio

from tinysteady_mailer.tsmailer import mailer, CONFIG

try:
    from dunamai import Version, Style

    __version__ = Version.from_git().serialize(style=Style.SemVer, dirty=True)
except ImportError:
    __version__ = importlib.metadata.version("treetrail-backend")

__doc__ = (
    "Send mails in batches. "
    "Configuration should be in a yaml config file"
    "given with the CONFIG enviroenment variable."
)


def main() -> None:
    from argparse import ArgumentParser

    parser = ArgumentParser(description=__doc__)
    parser.add_argument("-v", "--version", action="store_true", help="Print version and exit")
    args = parser.parse_args()
    if args.version:
        print(__version__)
        sys.exit(0)

    if CONFIG is None:
        print(__doc__)
        sys.exit(0)
    asyncio.run(mailer())