# -*- coding: utf-8 -*-

import os

import shortuuid
from django.core.files.storage import default_storage
from django.db import transaction
from filemd5 import calculate_md5

from photo.models import PhotoUUIDInfo


@transaction.atomic
def file_save(file_, prefix='img', ext='jpeg'):
    ext = os.path.splitext(file_.name)[-1] or ext

    photo, created = PhotoUUIDInfo.objects.select_for_update().get_or_create(photo_md5=calculate_md5(file_))

    if not photo.photo_path:
        path = '{}/{}{}'.format(prefix, shortuuid.uuid(), ext)
        if default_storage.exists(path):
            default_storage.delete(path)
        default_storage.save(path, file_)

        photo.photo_path = path
        photo.save()

    return photo.photo_path, ext