from django.apps import AppConfig
from django.db.models.signals import post_migrate

def create_photo_permissions(sender, **kwargs):
    """Create custom permissions for photos"""
    from django.contrib.auth.models import Permission
    from django.contrib.contenttypes.models import ContentType
    from media.models import Photo

    content_type = ContentType.objects.get_for_model(Photo)
    Permission.objects.get_or_create(
        codename='add_photo',
        name='Can add photo',
        content_type=content_type,
    )
    Permission.objects.get_or_create(
        codename='change_photo',
        name='Can change photo',
        content_type=content_type,
    )
    Permission.objects.get_or_create(
        codename='delete_photo',
        name='Can delete photo',
        content_type=content_type,
    )

class MediaConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'media'

    def ready(self):
        post_migrate.connect(create_photo_permissions, sender=self)