import signal
import threading

from django.core.management.base import BaseCommand, CommandError


class Command(BaseCommand):
    help = "Run SIP, ZLM ownership, recording, auto-proxy, and opt-in heartbeat as one leader"

    def handle(self, *args, **options):
        from app.services.lifecycle import get_service_manager
        manager = get_service_manager()
        if not manager.start():
            raise CommandError("another process already owns the background-service leader lock")
        stop = threading.Event()

        def _shutdown(*_args):
            stop.set()

        for signum in (signal.SIGINT, signal.SIGTERM):
            try:
                signal.signal(signum, _shutdown)
            except (ValueError, OSError):
                pass
        self.stdout.write(self.style.SUCCESS("background services running as leader"))
        stop.wait()
        manager.stop()