from rest_framework.test import APITransactionTestCase
from django.test import TestCase, override_settings
from django.core.urlresolvers import reverse
from django.core.cache import cache
from django.conf import settings
from django.utils import timezone
from ad_on.users.tests.factories import UserFactory
from ..models import Card, Device, Log
from ..enums import ContentType
from .factories import AppFactory, CardFactory, AppCardFactory, ArticleFactory, VideoFactory, HtmlFactory, DeviceFactory


class AppConfigTests(APITransactionTestCase):
    def setUp(self):
        self.app = AppFactory.create(name='Config Test App')
        self.user = UserFactory.create(username='test_user')
        self.app.account.add(self.user)

    def test_card_list_count(self):
        """ Test card-list length for AppConfig endpoint
        """
        self.client.credentials(HTTP_AUTHORIZATION='App-Token ' + self.app.app_key)
        CardFactory.create_batch(5, app=self.app, content_type=ContentType.article.value)
        for card in Card.objects.filter(app=self.app):
            AppCardFactory.create(card=card, app=self.app)

        url = reverse('api_1:app-config')
        response = self.client.get(url)
        self.assertEqual(len(response.data['cards']), 5)

    @override_settings(CACHES={'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}})
    def test_caching(self):
        """Test caching for AppConfig endpoint
        """
        # create a card
        self.client.credentials(HTTP_AUTHORIZATION='App-Token ' + self.app.app_key)
        url = reverse('api_1:app-config')
        card = CardFactory.create(content_type=ContentType.article.value)
        ArticleFactory.create(card=card)
        AppCardFactory.create(card=card, content_type=ContentType.article.value, app=self.app, position=1)
        response = self.client.get(url)
        self.assertEqual(len(response.data['cards']), 1)

        # create another card and check if cache is active and only one card is returned
        card_2 = CardFactory.create(content_type=ContentType.article.value)
        ArticleFactory.create(card=card_2)
        AppCardFactory.create(card=card_2, content_type=ContentType.article.value, app=self.app, position=2)
        response = self.client.get(url)
        self.assertEqual(len(response.data['cards']), 1) # <-- here it fails! (2 != 1)

        # check if after clearing the cache both cards are returned
        cache.clear()
        response = self.client.get(url)
        self.assertEqual(len(response.data['cards']), 2)