from django.core.paginator import Paginator
from django.test import TestCase
from boards import settings
from boards.models import Tag, Post, Thread


class PostTests(TestCase):

    def _create_post(self):
        tag = Tag.objects.create(name='test_tag')
        return Post.objects.create_post(title='title', text='text',
                                        tags=[tag])

    def test_post_add(self):
        """Test adding post"""

        post = self._create_post()

        self.assertIsNotNone(post, 'No post was created.')
        self.assertEqual('test_tag', post.get_thread().tags.all()[0].name,
                         'No tags were added to the post.')

    def test_delete_post(self):
        """Test post deletion"""

        post = self._create_post()
        post_id = post.id

        post.delete()

        self.assertFalse(Post.objects.filter(id=post_id).exists())

    def test_delete_thread(self):
        """Test thread deletion"""

        opening_post = self._create_post()
        thread = opening_post.get_thread()
        reply = Post.objects.create_post("", "", thread=thread)

        thread.delete()

        self.assertFalse(Post.objects.filter(id=reply.id).exists())

    def test_post_to_thread(self):
        """Test adding post to a thread"""

        op = self._create_post()
        post = Post.objects.create_post("", "", thread=op.get_thread())

        self.assertIsNotNone(post, 'Reply to thread wasn\'t created')
        self.assertEqual(op.get_thread().last_edit_time, post.pub_time,
                         'Post\'s create time doesn\'t match thread last edit'
                         ' time')

    def test_delete_posts_by_ip(self):
        """Test deleting posts with the given ip"""

        post = self._create_post()
        post_id = post.id

        Post.objects.delete_posts_by_ip('0.0.0.0')

        self.assertFalse(Post.objects.filter(id=post_id).exists())

    def test_get_thread(self):
        """Test getting all posts of a thread"""

        opening_post = self._create_post()

        for i in range(2):
            Post.objects.create_post('title', 'text',
                                     thread=opening_post.get_thread())

        thread = opening_post.get_thread()

        self.assertEqual(3, thread.replies.count())

    def test_create_post_with_tag(self):
        """Test adding tag to post"""

        tag = Tag.objects.create(name='test_tag')
        post = Post.objects.create_post(title='title', text='text', tags=[tag])

        thread = post.get_thread()
        self.assertIsNotNone(post, 'Post not created')
        self.assertTrue(tag in thread.tags.all(), 'Tag not added to thread')
        self.assertTrue(thread in tag.threads.all(), 'Thread not added to tag')

    def test_thread_max_count(self):
        """Test deletion of old posts when the max thread count is reached"""

        for i in range(settings.MAX_THREAD_COUNT + 1):
            self._create_post()

        self.assertEqual(settings.MAX_THREAD_COUNT,
                         len(Thread.objects.filter(archived=False)))

    def test_pages(self):
        """Test that the thread list is properly split into pages"""

        for i in range(settings.MAX_THREAD_COUNT):
            self._create_post()

        all_threads = Thread.objects.filter(archived=False)

        paginator = Paginator(Thread.objects.filter(archived=False),
                              settings.THREADS_PER_PAGE)
        posts_in_second_page = paginator.page(2).object_list
        first_post = posts_in_second_page[0]

        self.assertEqual(all_threads[settings.THREADS_PER_PAGE].id,
                         first_post.id)