"""Entry point for imap-idle-caldav daemon."""

import logging
import signal
import sys
import threading

from .caldav_client import CalDAVHandler
from .config import load_config, parse_args
from .email_processor import process_email
from .imap_client import run_idle_loop

log = logging.getLogger("imap_idle_caldav")


def main() -> None:
    config_path = parse_args()
    config = load_config(config_path)

    logging.basicConfig(
        level=getattr(logging, config.logging.level.upper(), logging.INFO),
        format="%(asctime)s %(levelname)s [%(name)s] %(message)s",
        stream=sys.stderr,
    )

    caldav_handler = CalDAVHandler(config.caldav)
    caldav_handler.connect()

    shutdown = threading.Event()

    def on_signal(signum, _frame):
        log.info("Received signal %s, shutting down", signal.Signals(signum).name)
        shutdown.set()

    signal.signal(signal.SIGTERM, on_signal)
    signal.signal(signal.SIGINT, on_signal)

    def on_message(raw_bytes: bytes) -> None:
        events = process_email(raw_bytes)
        for event in events:
            caldav_handler.handle_event(event)

    log.info("Starting IMAP IDLE daemon")
    run_idle_loop(config.imap, on_message, shutdown_event=shutdown)
    log.info("Daemon stopped")


if __name__ == "__main__":
    main()