"""Realtime propagation of authentication-session revocation."""

from __future__ import annotations

import logging

from asgiref.sync import async_to_sync
from channels.layers import get_channel_layer
from django.db import transaction

logger = logging.getLogger(__name__)


def schedule_auth_session_revoked(*, user_id: int, session_id: str) -> None:
    def _send() -> None:
        channel_layer = get_channel_layer()
        if channel_layer is None:
            return
        try:
            async_to_sync(channel_layer.group_send)(
                f"user_{user_id}",
                {
                    "type": "auth_session_revoked",
                    "session_id": str(session_id),
                },
            )
        except Exception as error:
            logger.exception(
                "Auth session revocation realtime update failed",
                extra={
                    "event": "authentication.session.realtime_revocation_failed",
                    "user_id": user_id,
                    "auth_session_id": str(session_id),
                    "error_type": type(error).__name__,
                },
            )

    transaction.on_commit(_send)