# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Console entrypoint, so `python -m signal_bot` actually starts the bot.

The old readme told people to run `python main.py`, which had no __main__
block and no uvicorn.run() call, so it silently did nothing at all.

The bind address comes from Config rather than os.getenv() here: this module
runs *before* uvicorn imports the app, and therefore before anything has
called load_dotenv(), so reading the environment directly would ignore
BIND_HOST/BIND_PORT whenever they live in .env -- which is where they live.
"""

from __future__ import annotations

import uvicorn

from signal_bot.config_env import load_config
from signal_bot.logging_setup import configure as configure_logging
from signal_bot.portcheck import PortInUseError, assert_port_free


def main() -> None:
    """Run the ASGI app under uvicorn, refusing to start on a taken port."""
    config = load_config()
    # Before anything else: uvicorn only configures its own loggers, so
    # without this the bot's own log lines go to logging.lastResort and
    # anything below WARNING is thrown away.
    configure_logging(config.log_level)
    try:
        assert_port_free(config.bind_host, config.bind_port)
    except PortInUseError as exc:
        raise SystemExit(str(exc)) from exc
    uvicorn.run("signal_bot.app:app", host=config.bind_host, port=config.bind_port)


if __name__ == "__main__":
    main()