"""Liveness check. Database only; never AD, SMTP or the share (AD-18)."""

import logging

from django.db import connection
from django.http import JsonResponse
from django.views.decorators.cache import never_cache
from django.views.decorators.http import require_GET

logger = logging.getLogger(__name__)


@require_GET
@never_cache
def healthz(request):
    try:
        with connection.cursor() as cursor:
            cursor.execute("SELECT 1")
            cursor.fetchone()
    except Exception as exc:  # any failure means unavailable
        logger.error("health check failed", extra={"error_type": type(exc).__name__})
        return JsonResponse({"status": "unavailable"}, status=503)
    return JsonResponse({"status": "ok"})