from django.test import TestCase
from django.urls import reverse
from django.contrib.auth.models import User, Permission
from django.contrib.auth.hashers import make_password

from watchlist.models import Movie, MovieVote

def create_user(name="user", is_staff=False):
    user = User.objects.create(username=name, password=make_password("dummy"))
    user.user_permissions.add(Permission.objects.get(codename="add_movie"))
    user.save()
    return user

def create_movie(name="Test movie", added_by="user"):
    return Movie.objects.create(name=name, suggested_by=User.objects.filter(username=added_by).first(), watched=False)

class IndexViewTests(TestCase):

    def setUp(self):
        self.user = create_user("user")

    def test_no_movies(self):
        """Tests the index page with no movies"""
        response = self.client.get(reverse('watchlist:index'))
        self.assertQuerysetEqual(response.context["object_list"], [])
        self.assertContains(response, "No movies yet.")
        self.assertNotContains(response, "Submit new movie")
    
    def test_no_movies_logged_in(self):
        """Tests the index page with no movies, while the user is logged in."""
        self.client.login(username="user", password="dummy")
        response = self.client.get(reverse('watchlist:index'))
        self.assertQuerysetEqual(response.context["object_list"], [])
        self.assertContains(response, "No movies yet.")
        self.assertContains(response, "Submit new movie")

    def test_with_movie(self):
        """Tests that the index page shows a movie, hides it if it watched, but shows
        it with proper filter"""
        create_movie()
        with self.subTest(watched=False):
            response = self.client.get(reverse('watchlist:index'))
            self.assertQuerysetEqual(response.context["object_list"], Movie.objects.all())
            self.assertContains(response, "Test movie")
        movie = Movie.objects.first()
        movie.watched = True
        movie.save()
        with self.subTest(watched=True, filter=False):
            response = self.client.get(reverse('watchlist:index'))
            self.assertQuerysetEqual(response.context["object_list"], [])
            self.assertNotContains(response, "Test movie")
        with self.subTest(watched=True, filter=True):
            response = self.client.get(reverse('watchlist:index',) + "?watched")
            self.assertQuerysetEqual(response.context["object_list"], Movie.objects.all())
            self.assertContains(response, "Test movie")
        
    def test_unvoted(self):
        """Test that the index shows an asterisk with movies that the user hasn't voted on yet"""
        create_movie()
        self.client.login(username="user",password="dummy")
        response = self.client.get(reverse('watchlist:index'))
        self.assertContains(response, "Test movie</a><sup>*</sup>")
    
    def test_voted(self):
        """Test that the index doesn't show an asterisk with movies the has voted on."""
        movie = create_movie()
        MovieVote.objects.create(movie=movie, user=self.user, vote=1)
        self.client.login(username="user",password="dummy")
        response = self.client.get(reverse('watchlist:index'))
        self.assertContains(response, "Test movie</a>")
        self.assertNotContains(response, "Test movie</a><sup>*</sup>")
        
    
    def test_movie_sorting(self):
        """Test various methods of movie sorting"""
        m1 = create_movie(name="ZZZ: A movie test")
        m2 = create_movie(name="Test movie 2")
        tests = [
            ('?sort=id', [m1,m2]),
            ('?sort=-id', [m2,m1]),
            ('?sort=name', [m2,m1]),
            ('?sort=-name', [m1,m2]),
        ]
        for param, qs in tests:
            with self.subTest(param=param, qs=qs):
                response = self.client.get(reverse('watchlist:index') + param)
                self.assertQuerysetEqual(response.context["object_list"], qs)
                self.assertContains(response, m1.name)
                self.assertContains(response, m2.name)

class MovieDetailViewTests(TestCase):

    def setUp(self):
        self.user = create_user("user")

    def test_detail_logged_out(self):
        m = create_movie()
        response = self.client.get(reverse('watchlist:detail', args=(m.id,)))
        self.assertContains(response, m.name)
        self.assertEqual(response.context["movie"], m)
        self.assertNotContains(response, "Edit")
    
    def test_detail_logged_in(self):
        m = create_movie()
        self.client.login(username="user", password="dummy")
        response = self.client.get(reverse('watchlist:detail', args=(m.id,)))
        self.assertContains(response, m.name)
        self.assertEqual(response.context["movie"], m)
        self.assertContains(response, "Edit")

    def test_no_movie(self):
        response = self.client.get(reverse('watchlist:detail', args=(1,)))
        self.assertEqual(response.status_code, 404)

class VoteTests(TestCase):

    def setUp(self):
        self.user = create_user("user")

    def test_no_user_voting(self):
        m = create_movie()
        response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"vote": 1, "seen": True})
        self.assertRedirects(response, "/accounts/login/?next=" + response.request["PATH_INFO"], fetch_redirect_response=False)
    
    def test_user_voting(self):
        m = create_movie()
        score = m.score
        self.client.login(username="user", password="dummy")
        for vote in [1, 0, -1]:
            for seen in True, False:
                with self.subTest(vote=vote, seen=seen):
                    response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"vote": str(vote), "seen": True})
                    self.assertRedirects(response, reverse('watchlist:index'))
                    self.assertEqual(m.score, score + vote)
    
    def test_invalid_votes(self):
        m = create_movie()
        score = m.score
        self.client.login(username="user", password="dummy")
        for vote in [2,3,4,-5,0.5,'abc','']:
            with self.subTest(vote=vote):
                response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"vote": str(vote), "seen": True})
                self.assertEqual(response.status_code, 400)
                self.assertEqual(m.score, score)
        with self.subTest(vote="empty"):
            response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"seen": True})
            self.assertEqual(response.status_code, 400)
            self.assertEqual(m.score, score)

    def test_seen(self):
        m = create_movie()
        self.client.login(username="user", password="dummy")
        for seen in (True, False) * 2:
            with self.subTest(seen=seen):
                data = {"vote": "0", "seen": "on"} if seen else {"vote": "0"}
                response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data=data)
                self.assertRedirects(response, reverse('watchlist:index'))
                mv = m.movievote_set.get(user=self.user)
                self.assertEqual(mv.seen, seen)
        

    def test_comment(self):
        m = create_movie()
        self.client.login(username="user", password="dummy")
        for comment in ["aaa", "", "TEST"]:
            with self.subTest(comment=comment):
                response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"vote": "0", "comment": comment})
                mv = m.movievote_set.get(user=self.user)
                self.assertEqual(mv.comment, None if comment == "" else comment)
        with self.subTest(comment=None):
            response = self.client.post(reverse('watchlist:vote', args=(m.id,)), data={"vote": "0"})
            mv = m.movievote_set.get(user=self.user)
            self.assertEqual(mv.comment, None)