# from __future__ import unicode_literals
# from django.utils.encoding import python_2_unicode_compatible
# from django.db import models
# from django.db.models.signals import pre_delete
# from django.dispatch import receiver
# from scrapy_djangoitem import DjangoItem
# from dynamic_scraper.models import Scraper, SchedulerRuntime


# @python_2_unicode_compatible
# class NewsWebsite(models.Model):
#     name = models.CharField(max_length=200)
#     url = models.URLField()
#     scraper = models.ForeignKey(Scraper, blank=True, null=True, on_delete=models.SET_NULL)
#     scraper_runtime = models.ForeignKey(SchedulerRuntime, blank=True, null=True, on_delete=models.SET_NULL)
    
#     def __str__(self):
#         return self.name


# @python_2_unicode_compatible
# class Article(models.Model):
#     title = models.CharField(max_length=200)
#     news_website = models.ForeignKey(NewsWebsite) 
#     description = models.TextField(blank=True)
#     url = models.URLField(blank=True)
#     thumbnail = models.CharField(max_length=200, blank=True)
#     checker_runtime = models.ForeignKey(SchedulerRuntime, blank=True, null=True, on_delete=models.SET_NULL)
    
#     def __str__(self):
#         return self.title


# class ArticleItem(DjangoItem):
#     django_model = Article


# @receiver(pre_delete)
# def pre_delete_handler(sender, instance, using, **kwargs):
#     if isinstance(instance, NewsWebsite):
#         if instance.scraper_runtime:
#             instance.scraper_runtime.delete()
    
#     if isinstance(instance, Article):
#         if instance.checker_runtime:
#             instance.checker_runtime.delete()
            
# pre_delete.connect(pre_delete_handler)