import os
import socket

import uvicorn


def listen_port() -> int:
    chosen = os.environ.get("RAPTD_PORT", "").strip()
    if chosen:
        return int(chosen)
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
        sock.bind(("127.0.0.1", 0))
        return sock.getsockname()[1]


def main() -> None:
    port = listen_port()
    print(f"http://127.0.0.1:{port}", flush=True)
    uvicorn.run("server.app:app", host="127.0.0.1", port=port)


if __name__ == "__main__":
    main()