"""Entry point: wire up the store, the background engine and the web server.

A single process hosts both the Flask web UI/API and the RSS->ntfy engine
(running in its own daemon thread). Served by waitress so it works the same on
Linux containers and Windows.
"""

import logging
import os
import signal
import sys

from waitress import serve

import store as store_mod
from engine import Engine
from webapp import create_app


def setup_logging(engine: Engine):
    logger = logging.getLogger("bridge")
    logger.setLevel(logging.INFO)
    fmt = logging.Formatter("%(asctime)s [%(levelname)s] %(message)s", "%Y-%m-%d %H:%M:%S")

    stream = logging.StreamHandler(sys.stdout)
    stream.setFormatter(fmt)
    logger.addHandler(stream)

    file_handler = logging.FileHandler(store_mod.LOG_PATH, encoding="utf-8")
    file_handler.setFormatter(fmt)
    logger.addHandler(file_handler)

    logger.addHandler(engine.ring)  # in-memory buffer for the web UI
    logger.propagate = False


def main():
    host = os.environ.get("HOST", "0.0.0.0")
    port = int(os.environ.get("PORT", "8080"))

    store = store_mod.Store()
    engine = Engine(store)
    setup_logging(engine)

    engine.start()
    app = create_app(store, engine)

    def shutdown(signum, frame):  # noqa: ARG001
        logging.getLogger("bridge").info("Shutting down (signal %s)", signum)
        engine.stop()
        sys.exit(0)

    signal.signal(signal.SIGINT, shutdown)
    signal.signal(signal.SIGTERM, shutdown)

    logging.getLogger("bridge").info("Web UI on http://%s:%s", host, port)
    serve(app, host=host, port=port, threads=8)


if __name__ == "__main__":
    main()