from random import randint
from sys import maxint

from django.test import TestCase, Client
from django.core.exceptions import ValidationError
from django.contrib.auth.models import User, AnonymousUser
from django.db import IntegrityError
from django.core.urlresolvers import reverse

from oscar.apps.catalogue.reviews.models import ProductReview, Vote
from oscar.test.helpers import create_product


class ProductReviewTests(TestCase):

    def setUp(self):
        username = str(randint(0, maxint))
        self.user = User.objects.create_user(username, '%s@users.com'%username, '%spass123'%username)
        self.anon_user = AnonymousUser()
        self.product = create_product()
        self.review = ProductReview.objects.create(product=self.product,
                                                   title="Dummy review",
                                                   score=3,
                                                   user=self.user)

    def test_top_level_reviews_must_have_titles_and_scores(self):
        self.assertRaises(ValidationError, ProductReview.objects.create, product=self.product,
                          user=self.user)

    def test_top_level_anonymous_reviews_must_have_names_and_emails(self):
        self.assertRaises(ValidationError, ProductReview.objects.create, product=self.product,
                          user=None, title="Anonymous review", score=3)


class TopLevelProductReviewVoteTests(ProductReviewTests):

    def test_try_vote_without_login(self):
        self.assertRaises(ValueError, Vote.objects.create, review=self.review, delta=-1, user=self.anon_user)

    def test_try_vote_more_than_once(self):
        vote1 = Vote.objects.create(review=self.review, user=self.user, delta=1)
        self.assertTrue(vote1)
        self.assertRaises(IntegrityError, Vote.objects.create, review=self.review, delta=-1, user=self.user)