from datetime import timedelta

from django.test import TestCase
from django.utils import timezone

from misago.categories.models import Category
from misago.threads import testutils
from misago.threads.models import Poll, Post, Thread, ThreadParticipant
from misago.users.testutils import create_test_user


class ThreadModelTests(TestCase):
    def setUp(self):
        datetime = timezone.now()

        self.category = Category.objects.all_categories()[:1][0]
        self.thread = Thread(
            category=self.category,
            started_on=datetime,
            starter_name="Tester",
            starter_slug="tester",
            last_post_on=datetime,
            last_poster_name="Tester",
            last_poster_slug="tester",
        )

        self.thread.set_title("Test thread")
        self.thread.save()

        Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster_name="Tester",
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        self.thread.synchronize()
        self.thread.save()

    def test_synchronize(self):
        """synchronize method updates thread data to reflect its contents"""
        user = create_test_user("User", "user@example.com")

        self.assertEqual(self.thread.replies, 0)

        datetime = timezone.now() + timedelta(5)
        post = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        # first sync call, updates last thread
        self.thread.synchronize()

        self.assertEqual(self.thread.last_post, post)
        self.assertEqual(self.thread.last_post_on, post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertFalse(self.thread.has_unapproved_posts)
        self.assertFalse(self.thread.has_hidden_posts)
        self.assertEqual(self.thread.replies, 1)

        # add unapproved post
        unapproved_post = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime + timedelta(5),
            updated_on=datetime + timedelta(5),
            is_unapproved=True,
        )

        self.thread.synchronize()
        self.assertEqual(self.thread.last_post, post)
        self.assertEqual(self.thread.last_post_on, post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertTrue(self.thread.has_unapproved_posts)
        self.assertFalse(self.thread.has_hidden_posts)
        self.assertEqual(self.thread.replies, 1)

        # add hidden post
        hidden_post = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime + timedelta(10),
            updated_on=datetime + timedelta(10),
            is_hidden=True,
        )

        self.thread.synchronize()
        self.assertEqual(self.thread.last_post, hidden_post)
        self.assertEqual(self.thread.last_post_on, hidden_post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertTrue(self.thread.has_unapproved_posts)
        self.assertTrue(self.thread.has_hidden_posts)
        self.assertEqual(self.thread.replies, 2)

        # unhide post
        hidden_post.is_hidden = False
        hidden_post.save()

        # last post changed to unhidden one
        self.thread.synchronize()
        self.assertEqual(self.thread.last_post, hidden_post)
        self.assertEqual(self.thread.last_post_on, hidden_post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertTrue(self.thread.has_unapproved_posts)
        self.assertFalse(self.thread.has_hidden_posts)
        self.assertEqual(self.thread.replies, 2)

        # unmoderate post
        unapproved_post.is_unapproved = False
        unapproved_post.save()

        # last post not changed, but flags and count did
        self.thread.synchronize()
        self.assertEqual(self.thread.last_post, hidden_post)
        self.assertEqual(self.thread.last_post_on, hidden_post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertFalse(self.thread.has_unapproved_posts)
        self.assertFalse(self.thread.has_hidden_posts)
        self.assertEqual(self.thread.replies, 3)

        # add event post
        event = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="-",
            parsed="-",
            checksum="nope",
            posted_on=datetime + timedelta(10),
            updated_on=datetime + timedelta(10),
            is_event=True,
        )

        self.thread.synchronize()
        self.assertEqual(self.thread.last_post, event)
        self.assertEqual(self.thread.last_post_on, event.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)
        self.assertTrue(self.thread.last_post_is_event)
        self.assertTrue(self.thread.has_events)
        self.assertFalse(self.thread.has_reported_posts)
        self.assertFalse(self.thread.has_unapproved_posts)
        self.assertFalse(self.thread.has_hidden_posts)
        # events don't count to reply count
        self.assertEqual(self.thread.replies, 3)

        # create another post to provoke other has_events resolution path
        Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        self.thread.synchronize()
        self.assertFalse(self.thread.last_post_is_event)
        self.assertTrue(self.thread.has_events)

        # remove event
        event.delete()

        self.thread.synchronize()
        self.assertFalse(self.thread.last_post_is_event)
        self.assertFalse(self.thread.has_events)

        # has poll flag
        self.assertFalse(self.thread.has_poll)

        Poll.objects.create(
            thread=self.thread,
            category=self.category,
            poster_name="test",
            poster_slug="test",
            choices=[],
        )

        self.thread.synchronize()
        self.assertTrue(self.thread.has_poll)

    def test_set_first_post(self):
        """set_first_post sets first post and poster data on thread"""
        user = create_test_user("User", "user@example.com")

        datetime = timezone.now() + timedelta(5)

        post = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        self.thread.set_first_post(post)
        self.assertEqual(self.thread.first_post, post)
        self.assertEqual(self.thread.started_on, post.posted_on)
        self.assertEqual(self.thread.starter, user)
        self.assertEqual(self.thread.starter_name, user.username)
        self.assertEqual(self.thread.starter_slug, user.slug)

    def test_set_last_post(self):
        """set_last_post sets first post and poster data on thread"""
        user = create_test_user("User", "user@example.com")

        datetime = timezone.now() + timedelta(5)

        post = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        self.thread.set_last_post(post)
        self.assertEqual(self.thread.last_post, post)
        self.assertEqual(self.thread.last_post_on, post.posted_on)
        self.assertEqual(self.thread.last_poster, user)
        self.assertEqual(self.thread.last_poster_name, user.username)
        self.assertEqual(self.thread.last_poster_slug, user.slug)

    def test_set_best_answer(self):
        """set_best_answer sets best answer and setter data on thread"""
        user = create_test_user("User", "user@example.com")

        best_answer = Post.objects.create(
            category=self.category,
            thread=self.thread,
            poster=user,
            poster_name=user.username,
            original="Hello! I am test message!",
            parsed="<p>Hello! I am test message!</p>",
            checksum="nope",
            posted_on=timezone.now(),
            updated_on=timezone.now(),
            is_protected=True,
        )

        self.thread.synchronize()
        self.thread.save()

        self.thread.set_best_answer(user, best_answer)
        self.thread.save()

        self.assertEqual(self.thread.best_answer, best_answer)
        self.assertTrue(self.thread.has_best_answer)
        self.assertTrue(self.thread.best_answer_is_protected)
        self.assertTrue(self.thread.best_answer_marked_on)
        self.assertEqual(self.thread.best_answer_marked_by, user)
        self.assertEqual(self.thread.best_answer_marked_by_name, user.username)
        self.assertEqual(self.thread.best_answer_marked_by_slug, user.slug)

        # clear best answer
        self.thread.clear_best_answer()

        self.assertIsNone(self.thread.best_answer)
        self.assertFalse(self.thread.has_best_answer)
        self.assertFalse(self.thread.best_answer_is_protected)
        self.assertIsNone(self.thread.best_answer_marked_on)
        self.assertIsNone(self.thread.best_answer_marked_by)
        self.assertIsNone(self.thread.best_answer_marked_by_name)
        self.assertIsNone(self.thread.best_answer_marked_by_slug)

    def test_set_invalid_best_answer(self):
        """set_best_answer implements some assertions for data integrity"""
        user = create_test_user("User", "user@example.com")

        other_thread = testutils.post_thread(self.category)
        with self.assertRaises(ValueError):
            self.thread.set_best_answer(user, other_thread.first_post)

        with self.assertRaises(ValueError):
            self.thread.set_best_answer(user, self.thread.first_post)

        with self.assertRaises(ValueError):
            reply = testutils.reply_thread(self.thread, is_hidden=True)
            self.thread.set_best_answer(user, reply)

        with self.assertRaises(ValueError):
            reply = testutils.reply_thread(self.thread, is_unapproved=True)
            self.thread.set_best_answer(user, reply)

    def test_move(self):
        """move(new_category) moves thread to other category"""
        root_category = Category.objects.root_category()
        Category(name="New Category", slug="new-category").insert_at(
            root_category, position="last-child", save=True
        )
        new_category = Category.objects.get(slug="new-category")

        self.thread.move(new_category)
        self.assertEqual(self.thread.category, new_category)

        for post in self.thread.post_set.all():
            self.assertEqual(post.category_id, new_category.id)

    def test_merge(self):
        """merge(other_thread) moves other thread content to this thread"""
        with self.assertRaises(ValueError):
            self.thread.merge(self.thread)

        datetime = timezone.now() + timedelta(5)

        other_thread = Thread(
            category=self.category,
            started_on=datetime,
            starter_name="Tester",
            starter_slug="tester",
            last_post_on=datetime,
            last_poster_name="Tester",
            last_poster_slug="tester",
        )

        other_thread.set_title("Other thread")
        other_thread.save()

        post = Post.objects.create(
            category=self.category,
            thread=other_thread,
            poster_name="Admin",
            original="Hello! I am other message!",
            parsed="<p>Hello! I am other message!</p>",
            checksum="nope",
            posted_on=datetime,
            updated_on=datetime,
        )

        other_thread.first_post = post
        other_thread.last_post = post
        other_thread.save()

        self.thread.merge(other_thread)

        self.thread.synchronize()
        self.assertEqual(self.thread.replies, 1)
        self.assertEqual(self.thread.last_post, post)
        self.assertEqual(self.thread.last_post_on, post.posted_on)
        self.assertEqual(self.thread.last_poster_name, "Admin")
        self.assertEqual(self.thread.last_poster_slug, "admin")

    def test_delete_private_thread(self):
        """
        private thread gets deleted automatically
        when there are no participants left in it
        """
        user_1 = create_test_user("User1", "user1@example.com")
        user_2 = create_test_user("User2", "user2@example.com")

        ThreadParticipant.objects.add_participants(self.thread, [user_1, user_2])
        self.assertEqual(self.thread.participants.count(), 2)

        user_1.delete()
        Thread.objects.get(id=self.thread.id)

        user_2.delete()
        with self.assertRaises(Thread.DoesNotExist):
            Thread.objects.get(id=self.thread.id)