from __future__ import annotations

import argparse
from wsgiref.simple_server import make_server

from .api import App
from .store import Engine


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(prog="approval-engine")
    sub = parser.add_subparsers(dest="cmd", required=True)
    serve = sub.add_parser("serve", help="serve the introspection API")
    serve.add_argument("--db", default="approvals.sqlite")
    serve.add_argument("--host", default="127.0.0.1")
    serve.add_argument("--port", type=int, default=8787)
    args = parser.parse_args(argv)
    if args.cmd == "serve":
        engine = Engine(args.db)
        httpd = make_server(args.host, args.port, App(engine))
        print(f"approval-engine on http://{args.host}:{args.port} db={args.db}")
        httpd.serve_forever()
        return 0
    return 2


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