from django.apps import AppConfig


class AssetsConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'assets'
    
    def ready(self):
        """Import signals when app is ready"""
        import assets.signals
        
        # Register private file guards
        from common.private_files.registry import register
        
        # Guard for green surfaces comment photos
        def guard_green_surfaces_comment_photo(obj, user):
            """
            Allow access to comment photos for users with 'nature' thematic access.
            """
            from assets.models.nature import GreenSurfacesCommentPhoto
            from common.models import UserThematics
            
            if not isinstance(obj, GreenSurfacesCommentPhoto):
                return False
            
            if not user.is_authenticated:
                return False
            
            # Check if user has access to 'nature' thematic
            user_thematics = UserThematics.objects.filter(
                user_config__user=user,
                thematic__code='nature'
            ).exists()
            
            return user_thematics
        
        register('assets', 'GreenSurfacesCommentPhoto', 'photo', guard_green_surfaces_comment_photo)

        # Guard for traffic light controller log files
        def guard_tl_controller_log(obj, user):
            from common.models import UserThematics
            if not user.is_authenticated:
                return False
            return UserThematics.objects.filter(
                user_config__user=user,
                thematic__code='trafficlights'
            ).exists()

        register('assets', 'TrafficLightControllerLogFile', 'file', guard_tl_controller_log)