import urllib.parse
from typing import List

from django.contrib.auth.models import User
from django.test import TestCase
from django.urls import reverse

from bookmarks.models import Bookmark, Tag, UserProfile
from bookmarks.tests.helpers import BookmarkFactoryMixin, collapse_whitespace


class BookmarkSharedViewTestCase(TestCase, BookmarkFactoryMixin):

    def authenticate(self) -> None:
        user = self.get_or_create_test_user()
        self.client.force_login(user)

    def assertBookmarkCount(self, html: str, bookmark: Bookmark, count: int, link_target: str = '_blank'):
        self.assertInHTML(
            f'<a href="{bookmark.url}" target="{link_target}" rel="noopener">{bookmark.resolved_title}</a>',
            html, count=count
        )

    def assertVisibleBookmarks(self, response, bookmarks: List[Bookmark], link_target: str = '_blank'):
        html = response.content.decode()
        self.assertContains(response, '<li ld-bookmark-item class="shared">', count=len(bookmarks))

        for bookmark in bookmarks:
            self.assertBookmarkCount(html, bookmark, 1, link_target)

    def assertInvisibleBookmarks(self, response, bookmarks: List[Bookmark], link_target: str = '_blank'):
        html = response.content.decode()

        for bookmark in bookmarks:
            self.assertBookmarkCount(html, bookmark, 0, link_target)

    def assertVisibleTags(self, response, tags: [Tag]):
        self.assertContains(response, 'data-is-tag-item', count=len(tags))

        for tag in tags:
            self.assertContains(response, tag.name)

    def assertInvisibleTags(self, response, tags: [Tag]):
        for tag in tags:
            self.assertNotContains(response, tag.name)

    def assertVisibleUserOptions(self, response, users: List[User]):
        html = response.content.decode()

        user_options = [
            '<option value="" selected="">Everyone</option>'
        ]
        for user in users:
            user_options.append(f'<option value="{user.username}">{user.username}</option>')
        user_select_html = f'''
        <select name="user" class="form-select" required="" id="id_user">
            {''.join(user_options)}
        </select>
        '''

        self.assertInHTML(user_select_html, html)

    def assertEditLink(self, response, url):
        html = response.content.decode()
        self.assertInHTML(f'''
            <a href="{url}">Edit</a>        
        ''', html)

    def test_should_list_shared_bookmarks_from_all_users_that_have_sharing_enabled(self):
        self.authenticate()
        user1 = self.setup_user(enable_sharing=True)
        user2 = self.setup_user(enable_sharing=True)
        user3 = self.setup_user(enable_sharing=True)
        user4 = self.setup_user(enable_sharing=False)

        visible_bookmarks = [
            self.setup_bookmark(shared=True, user=user1),
            self.setup_bookmark(shared=True, user=user2),
            self.setup_bookmark(shared=True, user=user3),
        ]
        invisible_bookmarks = [
            self.setup_bookmark(shared=False, user=user1),
            self.setup_bookmark(shared=False, user=user2),
            self.setup_bookmark(shared=False, user=user3),
            self.setup_bookmark(shared=True, user=user4),
        ]

        response = self.client.get(reverse('bookmarks:shared'))
        html = collapse_whitespace(response.content.decode())

        # Should render list
        self.assertIn('<ul class="bookmark-list" data-bookmarks-total="3">', html)
        self.assertVisibleBookmarks(response, visible_bookmarks)
        self.assertInvisibleBookmarks(response, invisible_bookmarks)

    def test_should_list_shared_bookmarks_from_selected_user(self):
        self.authenticate()
        user1 = self.setup_user(enable_sharing=True)
        user2 = self.setup_user(enable_sharing=True)
        user3 = self.setup_user(enable_sharing=True)

        visible_bookmarks = [
            self.setup_bookmark(shared=True, user=user1),
        ]
        invisible_bookmarks = [
            self.setup_bookmark(shared=True, user=user2),
            self.setup_bookmark(shared=True, user=user3),
        ]

        url = reverse('bookmarks:shared') + '?user=' + user1.username
        response = self.client.get(url)

        self.assertVisibleBookmarks(response, visible_bookmarks)
        self.assertInvisibleBookmarks(response, invisible_bookmarks)

    def test_should_list_bookmarks_matching_query(self):
        self.authenticate()
        user = self.setup_user(enable_sharing=True)
        visible_bookmarks = [
            self.setup_bookmark(shared=True, title='searchvalue', user=user),
            self.setup_bookmark(shared=True, title='searchvalue', user=user),
            self.setup_bookmark(shared=True, title='searchvalue', user=user)
        ]
        invisible_bookmarks = [
            self.setup_bookmark(shared=True, user=user),
            self.setup_bookmark(shared=True, user=user),
            self.setup_bookmark(shared=True, user=user)
        ]

        response = self.client.get(reverse('bookmarks:shared') + '?q=searchvalue')
        html = collapse_whitespace(response.content.decode())

        # Should render list
        self.assertIn('<ul class="bookmark-list" data-bookmarks-total="3">', html)
        self.assertVisibleBookmarks(response, visible_bookmarks)
        self.assertInvisibleBookmarks(response, invisible_bookmarks)

    def test_should_list_only_publicly_shared_bookmarks_without_login(self):
        user1 = self.setup_user(enable_sharing=True, enable_public_sharing=True)
        user2 = self.setup_user(enable_sharing=True)

        visible_bookmarks = [
            self.setup_bookmark(shared=True, user=user1),
            self.setup_bookmark(shared=True, user=user1),
            self.setup_bookmark(shared=True, user=user1),
        ]
        invisible_bookmarks = [
            self.setup_bookmark(shared=True, user=user2),
            self.setup_bookmark(shared=True, user=user2),
            self.setup_bookmark(shared=True, user=user2),
        ]

        response = self.client.get(reverse('bookmarks:shared'))
        html = collapse_whitespace(response.content.decode())

        # Should render list
        self.assertIn('<ul class="bookmark-list" data-bookmarks-total="3">', html)
        self.assertVisibleBookmarks(response, visible_bookmarks)
        self.assertInvisibleBookmarks(response, invisible_bookmarks)

    def test_should_list_tags_for_shared_bookmarks_from_all_users_that_have_sharing_enabled(self):
        self.authenticate()
        user1 = self.setup_user(enable_sharing=True)
        user2 = self.setup_user(enable_sharing=True)
        user3 = self.setup_user(enable_sharing=True)
        user4 = self.setup_user(enable_sharing=False)
        visible_tags = [
            self.setup_tag(user=user1),
            self.setup_tag(user=user2),
            self.setup_tag(user=user3),
        ]
        invisible_tags = [
            self.setup_tag(user=user1),
            self.setup_tag(user=user2),
            self.setup_tag(user=user3),
            self.setup_tag(user=user4),
        ]

        self.setup_bookmark(shared=True, user=user1, tags=[visible_tags[0]])
        self.setup_bookmark(shared=True, user=user2, tags=[visible_tags[1]])
        self.setup_bookmark(shared=True, user=user3, tags=[visible_tags[2]])

        self.setup_bookmark(shared=False, user=user1, tags=[invisible_tags[0]])
        self.setup_bookmark(shared=False, user=user2, tags=[invisible_tags[1]])
        self.setup_bookmark(shared=False, user=user3, tags=[invisible_tags[2]])
        self.setup_bookmark(shared=True, user=user4, tags=[invisible_tags[3]])

        response = self.client.get(reverse('bookmarks:shared'))

        self.assertVisibleTags(response, visible_tags)
        self.assertInvisibleTags(response, invisible_tags)

    def test_should_list_tags_for_shared_bookmarks_from_selected_user(self):
        self.authenticate()
        user1 = self.setup_user(enable_sharing=True)
        user2 = self.setup_user(enable_sharing=True)
        user3 = self.setup_user(enable_sharing=True)
        visible_tags = [
            self.setup_tag(user=user1),
        ]
        invisible_tags = [
            self.setup_tag(user=user2),
            self.setup_tag(user=user3),
        ]

        self.setup_bookmark(shared=True, user=user1, tags=[visible_tags[0]])
        self.setup_bookmark(shared=True, user=user2, tags=[invisible_tags[0]])
        self.setup_bookmark(shared=True, user=user3, tags=[invisible_tags[1]])

        url = reverse('bookmarks:shared') + '?user=' + user1.username
        response = self.client.get(url)

        self.assertVisibleTags(response, visible_tags)
        self.assertInvisibleTags(response, invisible_tags)

    def test_should_list_tags_for_bookmarks_matching_query(self):
        self.authenticate()
        user1 = self.setup_user(enable_sharing=True)
        user2 = self.setup_user(enable_sharing=True)
        user3 = self.setup_user(enable_sharing=True)
        visible_tags = [
            self.setup_tag(user=user1),
            self.setup_tag(user=user2),
            self.setup_tag(user=user3),
        ]
        invisible_tags = [
            self.setup_tag(user=user1),
            self.setup_tag(user=user2),
            self.setup_tag(user=user3),
        ]

        self.setup_bookmark(shared=True, user=user1, title='searchvalue', tags=[visible_tags[0]])
        self.setup_bookmark(shared=True, user=user2, title='searchvalue', tags=[visible_tags[1]])
        self.setup_bookmark(shared=True, user=user3, title='searchvalue', tags=[visible_tags[2]])

        self.setup_bookmark(shared=True, user=user1, tags=[invisible_tags[0]])
        self.setup_bookmark(shared=True, user=user2, tags=[invisible_tags[1]])
        self.setup_bookmark(shared=True, user=user3, tags=[invisible_tags[2]])

        response = self.client.get(reverse('bookmarks:shared') + '?q=searchvalue')

        self.assertVisibleTags(response, visible_tags)
        self.assertInvisibleTags(response, invisible_tags)

    def test_should_list_only_tags_for_publicly_shared_bookmarks_without_login(self):
        user1 = self.setup_user(enable_sharing=True, enable_public_sharing=True)
        user2 = self.setup_user(enable_sharing=True)

        visible_tags = [
            self.setup_tag(user=user1),
            self.setup_tag(user=user1),
        ]
        invisible_tags = [
            self.setup_tag(user=user2),
            self.setup_tag(user=user2),
        ]

        self.setup_bookmark(shared=True, user=user1, tags=[visible_tags[0]])
        self.setup_bookmark(shared=True, user=user1, tags=[visible_tags[1]])

        self.setup_bookmark(shared=True, user=user2, tags=[invisible_tags[0]])
        self.setup_bookmark(shared=True, user=user2, tags=[invisible_tags[1]])

        response = self.client.get(reverse('bookmarks:shared'))

        self.assertVisibleTags(response, visible_tags)
        self.assertInvisibleTags(response, invisible_tags)

    def test_should_list_users_with_shared_bookmarks_if_sharing_is_enabled(self):
        self.authenticate()
        expected_visible_users = [
            self.setup_user(name='user_a', enable_sharing=True),
            self.setup_user(name='user_b', enable_sharing=True),
        ]
        self.setup_bookmark(shared=True, user=expected_visible_users[0])
        self.setup_bookmark(shared=True, user=expected_visible_users[1])

        self.setup_bookmark(shared=False, user=self.setup_user(enable_sharing=True))
        self.setup_bookmark(shared=True, user=self.setup_user(enable_sharing=False))

        response = self.client.get(reverse('bookmarks:shared'))
        self.assertVisibleUserOptions(response, expected_visible_users)

    def test_should_list_only_users_with_publicly_shared_bookmarks_without_login(self):
        # users with public sharing enabled
        expected_visible_users = [
            self.setup_user(name='user_a', enable_sharing=True, enable_public_sharing=True),
            self.setup_user(name='user_b', enable_sharing=True, enable_public_sharing=True),
        ]
        self.setup_bookmark(shared=True, user=expected_visible_users[0])
        self.setup_bookmark(shared=True, user=expected_visible_users[1])

        # users with public sharing disabled
        self.setup_bookmark(shared=True, user=self.setup_user(enable_sharing=True))
        self.setup_bookmark(shared=True, user=self.setup_user(enable_sharing=True))

        response = self.client.get(reverse('bookmarks:shared'))
        self.assertVisibleUserOptions(response, expected_visible_users)

    def test_should_open_bookmarks_in_new_page_by_default(self):
        self.authenticate()
        user = self.get_or_create_test_user()
        user.profile.enable_sharing = True
        user.profile.save()
        visible_bookmarks = [
            self.setup_bookmark(shared=True),
            self.setup_bookmark(shared=True),
            self.setup_bookmark(shared=True)
        ]

        response = self.client.get(reverse('bookmarks:shared'))

        self.assertVisibleBookmarks(response, visible_bookmarks, '_blank')

    def test_should_open_bookmarks_in_same_page_if_specified_in_user_profile(self):
        self.authenticate()
        user = self.get_or_create_test_user()
        user.profile.enable_sharing = True
        user.profile.bookmark_link_target = UserProfile.BOOKMARK_LINK_TARGET_SELF
        user.profile.save()

        visible_bookmarks = [
            self.setup_bookmark(shared=True),
            self.setup_bookmark(shared=True),
            self.setup_bookmark(shared=True)
        ]

        response = self.client.get(reverse('bookmarks:shared'))

        self.assertVisibleBookmarks(response, visible_bookmarks, '_self')

    def test_edit_link_return_url_respects_search_options(self):
        self.authenticate()
        user = self.get_or_create_test_user()
        user.profile.enable_sharing = True
        user.profile.save()

        bookmark = self.setup_bookmark(title='foo', shared=True, user=user)
        edit_url = reverse('bookmarks:edit', args=[bookmark.id])
        base_url = reverse('bookmarks:shared')

        # without query params
        return_url = urllib.parse.quote(base_url)
        url = f'{edit_url}?return_url={return_url}'

        response = self.client.get(base_url)
        self.assertEditLink(response, url)

        # with query
        url_params = '?q=foo'
        return_url = urllib.parse.quote(base_url + url_params)
        url = f'{edit_url}?return_url={return_url}'

        response = self.client.get(base_url + url_params)
        self.assertEditLink(response, url)

        # with query and user
        url_params = f'?q=foo&user={user.username}'
        return_url = urllib.parse.quote(base_url + url_params)
        url = f'{edit_url}?return_url={return_url}'

        response = self.client.get(base_url + url_params)
        self.assertEditLink(response, url)

        # with query and sort and page
        url_params = '?q=foo&sort=title_asc&page=2'
        return_url = urllib.parse.quote(base_url + url_params)
        url = f'{edit_url}?return_url={return_url}'

        response = self.client.get(base_url + url_params)
        self.assertEditLink(response, url)