from django.contrib.auth import get_user_model
from django.core import mail
from django.urls import reverse
from django.utils.encoding import smart_str

from misago.acl.testutils import override_acl
from misago.categories.models import Category
from misago.threads.models import ThreadParticipant
from misago.users.testutils import AuthenticatedUserTestCase


UserModel = get_user_model()


class StartPrivateThreadTests(AuthenticatedUserTestCase):
    def setUp(self):
        super(StartPrivateThreadTests, self).setUp()

        self.category = Category.objects.private_threads()
        self.api_link = reverse('misago:api:private-thread-list')

        self.other_user = UserModel.objects.create_user(
            'BobBoberson', 'bob@boberson.com', 'pass123'
        )

    def test_cant_start_thread_as_guest(self):
        """user has to be authenticated to be able to post private thread"""
        self.logout_user()

        response = self.client.post(self.api_link)
        self.assertEqual(response.status_code, 403)

    def test_cant_use_private_threads(self):
        """has no permission to use private threads"""
        override_acl(self.user, {'can_use_private_threads': 0})

        response = self.client.post(self.api_link)
        self.assertContains(response, "You can't use private threads.", status_code=403)

    def test_cant_start_private_thread(self):
        """permission to start private thread is validated"""
        override_acl(self.user, {'can_start_private_threads': 0})

        response = self.client.post(self.api_link)
        self.assertContains(response, "You can't start private threads.", status_code=403)

    def test_empty_data(self):
        """no data sent handling has no showstoppers"""
        response = self.client.post(self.api_link, data={})

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["You have to enter user names."],
                'title': ["You have to enter thread title."],
                'post': ["You have to enter a message."],
            }
        )

    def test_title_is_validated(self):
        """title is validated"""
        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "------",
                'post': "Lorem ipsum dolor met, sit amet elit!",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'title': ["Thread title should contain alpha-numeric characters."],
            }
        )

    def test_post_is_validated(self):
        """post is validated"""
        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Lorem ipsum dolor met",
                'post': "a",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'post': ["Posted message should be at least 5 characters long (it has 1)."],
            }
        )

    def test_cant_invite_self(self):
        """api validates that you cant invite yourself to private thread"""
        response = self.client.post(
            self.api_link,
            data={
                'to': [self.user.username],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["You can't include yourself on the list of users to invite to new thread."],
            }
        )

    def test_cant_invite_nonexisting(self):
        """api validates that you cant invite nonexisting user to thread"""
        response = self.client.post(
            self.api_link,
            data={
                'to': ['Ab', 'Cd'],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["One or more users could not be found: ab, cd"],
            }
        )

    def test_cant_invite_too_many(self):
        """api validates that you cant invite too many users to thread"""
        response = self.client.post(
            self.api_link,
            data={
                'to': ['Username{}'.format(i) for i in range(50)],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["You can't add more than 3 users to private thread (you've added 50)."],
            }
        )

    def test_cant_invite_no_permission(self):
        """api validates invited user permission to private thread"""
        override_acl(self.other_user, {'can_use_private_threads': 0})

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["BobBoberson can't participate in private threads."],
            }
        )

    def test_cant_invite_blocking(self):
        """api validates that you cant invite blocking user to thread"""
        self.other_user.blocks.add(self.user)

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(response.json(), {
            'to': ["BobBoberson is blocking you."],
        })

        # allow us to bypass blocked check
        override_acl(self.user, {'can_add_everyone_to_private_threads': 1})

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "-----",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'title': ["Thread title should contain alpha-numeric characters."],
            }
        )

    def test_cant_invite_followers_only(self):
        """api validates that you cant invite followers-only user to thread"""
        user_constant = UserModel.LIMIT_INVITES_TO_FOLLOWED
        self.other_user.limits_private_thread_invites_to = user_constant
        self.other_user.save()

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["BobBoberson limits invitations to private threads to followed users."],
            }
        )

        # allow us to bypass following check
        override_acl(self.user, {'can_add_everyone_to_private_threads': 1})

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "-----",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'title': ["Thread title should contain alpha-numeric characters."],
            }
        )

        # make user follow us
        override_acl(self.user, {'can_add_everyone_to_private_threads': 0})
        self.other_user.follows.add(self.user)

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "-----",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'title': ["Thread title should contain alpha-numeric characters."],
            }
        )

    def test_cant_invite_anyone(self):
        """api validates that you cant invite nobody user to thread"""
        user_constant = UserModel.LIMIT_INVITES_TO_NOBODY
        self.other_user.limits_private_thread_invites_to = user_constant
        self.other_user.save()

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Lorem ipsum dolor met",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'to': ["BobBoberson is not allowing invitations to private threads."],
            }
        )

        # allow us to bypass user preference check
        override_acl(self.user, {'can_add_everyone_to_private_threads': 1})

        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "-----",
                'post': "Lorem ipsum dolor.",
            }
        )

        self.assertEqual(response.status_code, 400)
        self.assertEqual(
            response.json(), {
                'title': ["Thread title should contain alpha-numeric characters."],
            }
        )

    def test_can_start_thread(self):
        """endpoint creates new thread"""
        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Hello, I am test thread!",
                'post': "Lorem ipsum dolor met!",
            }
        )
        self.assertEqual(response.status_code, 200)

        thread = self.user.thread_set.all()[:1][0]

        response_json = response.json()
        self.assertEqual(response_json['url'], thread.get_absolute_url())

        response = self.client.get(thread.get_absolute_url())
        self.assertContains(response, self.category.name)
        self.assertContains(response, thread.title)
        self.assertContains(response, "<p>Lorem ipsum dolor met!</p>")

        # don't count private threads
        self.reload_user()
        self.assertEqual(self.user.threads, 0)
        self.assertEqual(self.user.posts, 0)

        self.assertEqual(thread.category_id, self.category.pk)
        self.assertEqual(thread.title, "Hello, I am test thread!")
        self.assertEqual(thread.starter_id, self.user.id)
        self.assertEqual(thread.starter_name, self.user.username)
        self.assertEqual(thread.starter_slug, self.user.slug)
        self.assertEqual(thread.last_poster_id, self.user.id)
        self.assertEqual(thread.last_poster_name, self.user.username)
        self.assertEqual(thread.last_poster_slug, self.user.slug)

        post = self.user.post_set.all()[:1][0]
        self.assertEqual(post.category_id, self.category.pk)
        self.assertEqual(post.original, 'Lorem ipsum dolor met!')
        self.assertEqual(post.poster_id, self.user.id)
        self.assertEqual(post.poster_name, self.user.username)

        self.assertEqual(self.user.audittrail_set.count(), 1)

        # thread has two participants
        self.assertEqual(thread.participants.count(), 2)

        # we are thread owner
        ThreadParticipant.objects.get(thread=thread, user=self.user, is_owner=True)

        # other user was added to thread
        ThreadParticipant.objects.get(thread=thread, user=self.other_user, is_owner=False)

        # other user has sync_unread_private_threads flag
        user_to_sync = UserModel.objects.get(sync_unread_private_threads=True)
        self.assertEqual(user_to_sync, self.other_user)

        # notification about new private thread was sent to other user
        self.assertEqual(len(mail.outbox), 1)
        email = mail.outbox[-1]

        self.assertIn(self.user.username, email.subject)
        self.assertIn(thread.title, email.subject)

        email_body = smart_str(email.body)

        self.assertIn(self.user.username, email_body)
        self.assertIn(thread.title, email_body)
        self.assertIn(thread.get_absolute_url(), email_body)

    def test_post_unicode(self):
        """unicode characters can be posted"""
        response = self.client.post(
            self.api_link,
            data={
                'to': [self.other_user.username],
                'title': "Brzęczyżczykiewicz",
                'post': "Chrzążczyżewoszyce, powiat Łękółody.",
            }
        )
        self.assertEqual(response.status_code, 200)