import os
import uuid
from django.utils.deconstruct import deconstructible
from django.core.files.storage import default_storage
from django.db.models import FileField


@deconstructible
class RandomFileName(object):
    def __init__(self, path):
        self.path = os.path.join(path, "%s%s")

    def __call__(self, _, filename):
        # @note It's up to the validators to check if it's the correct file type in name or if one even exist.
        extension = os.path.splitext(filename)[1]
        return self.path % (uuid.uuid4(), extension)


def file_cleanup(sender, instance, **kwargs):
    for field in sender._meta.get_fields():
        if field and isinstance(field, FileField):
            default_storage.delete(getattr(instance, field.name).path)