"""
Core views - Health check and utility views
"""
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


@never_cache
@require_GET
def health_check(request):
    """
    Health check endpoint for monitoring and load balancers.
    Returns JSON with status of various services.
    """
    health_status = {
        'status': 'ok',
        'services': {}
    }
    
    # Check database connection
    try:
        with connection.cursor() as cursor:
            cursor.execute("SELECT 1")
        health_status['services']['database'] = 'ok'
    except Exception as e:
        health_status['status'] = 'error'
        health_status['services']['database'] = f'error: {str(e)}'
    
    # Check Redis/Celery (optional - don't fail if not available)
    try:
        from django_celery_beat.models import PeriodicTask
        PeriodicTask.objects.count()
        health_status['services']['celery_beat'] = 'ok'
    except Exception:
        health_status['services']['celery_beat'] = 'not_configured'
    
    # Return appropriate status code
    status_code = 200 if health_status['status'] == 'ok' else 503
    
    return JsonResponse(health_status, status=status_code)