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, BookmarkSearch, Tag, UserProfile
from bookmarks.tests.helpers import BookmarkFactoryMixin, HtmlTestMixin, collapse_whitespace


class BookmarkIndexViewTestCase(TestCase, BookmarkFactoryMixin, HtmlTestMixin):

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

    def assertVisibleBookmarks(self, response, bookmarks: List[Bookmark], link_target: str = '_blank'):
        soup = self.make_soup(response.content.decode())
        bookmark_list = soup.select_one(f'ul.bookmark-list[data-bookmarks-total="{len(bookmarks)}"]')
        self.assertIsNotNone(bookmark_list)

        bookmark_items = bookmark_list.select('li[ld-bookmark-item]')
        self.assertEqual(len(bookmark_items), len(bookmarks))

        for bookmark in bookmarks:
            bookmark_item = bookmark_list.select_one(
                f'li[ld-bookmark-item] a[href="{bookmark.url}"][target="{link_target}"]')
            self.assertIsNotNone(bookmark_item)

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

        for bookmark in bookmarks:
            bookmark_item = soup.select_one(
                f'li[ld-bookmark-item] a[href="{bookmark.url}"][target="{link_target}"]')
            self.assertIsNone(bookmark_item)

    def assertVisibleTags(self, response, tags: List[Tag]):
        soup = self.make_soup(response.content.decode())
        tag_cloud = soup.select_one('div.tag-cloud')
        self.assertIsNotNone(tag_cloud)

        tag_items = tag_cloud.select('a[data-is-tag-item]')
        self.assertEqual(len(tag_items), len(tags))

        tag_item_names = [tag_item.text.strip() for tag_item in tag_items]

        for tag in tags:
            self.assertTrue(tag.name in tag_item_names)

    def assertInvisibleTags(self, response, tags: List[Tag]):
        soup = self.make_soup(response.content.decode())
        tag_items = soup.select('a[data-is-tag-item]')

        tag_item_names = [tag_item.text.strip() for tag_item in tag_items]

        for tag in tags:
            self.assertFalse(tag.name in tag_item_names)

    def assertSelectedTags(self, response, tags: List[Tag]):
        soup = self.make_soup(response.content.decode())
        selected_tags = soup.select_one('p.selected-tags')
        self.assertIsNotNone(selected_tags)

        tag_list = selected_tags.select('a')
        self.assertEqual(len(tag_list), len(tags))

        for tag in tags:
            self.assertTrue(tag.name in selected_tags.text, msg=f'Selected tags do not contain: {tag.name}')

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

    def assertBulkActionForm(self, response, url: str):
        html = collapse_whitespace(response.content.decode())
        needle = collapse_whitespace(f'''
            <form class="bookmark-actions"
                action="{url}"
                method="post" autocomplete="off">
        ''')
        self.assertIn(needle, html)

    def test_should_list_unarchived_and_user_owned_bookmarks(self):
        other_user = User.objects.create_user('otheruser', 'otheruser@example.com', 'password123')
        visible_bookmarks = self.setup_numbered_bookmarks(3)
        invisible_bookmarks = [
            self.setup_bookmark(is_archived=True),
            self.setup_bookmark(user=other_user),
        ]

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

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

    def test_should_list_bookmarks_matching_query(self):
        visible_bookmarks = self.setup_numbered_bookmarks(3, prefix='foo')
        invisible_bookmarks = self.setup_numbered_bookmarks(3, prefix='bar')

        response = self.client.get(reverse('bookmarks:index') + '?q=foo')

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

    def test_should_list_tags_for_unarchived_and_user_owned_bookmarks(self):
        other_user = User.objects.create_user('otheruser', 'otheruser@example.com', 'password123')
        visible_bookmarks = self.setup_numbered_bookmarks(3, with_tags=True)
        archived_bookmarks = self.setup_numbered_bookmarks(3, with_tags=True, archived=True, tag_prefix='archived')
        other_user_bookmarks = self.setup_numbered_bookmarks(3, with_tags=True, user=other_user, tag_prefix='otheruser')

        visible_tags = self.get_tags_from_bookmarks(visible_bookmarks)
        invisible_tags = self.get_tags_from_bookmarks(archived_bookmarks + other_user_bookmarks)

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

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

    def test_should_list_tags_for_bookmarks_matching_query(self):
        visible_bookmarks = self.setup_numbered_bookmarks(3, with_tags=True, prefix='foo', tag_prefix='foo')
        invisible_bookmarks = self.setup_numbered_bookmarks(3, with_tags=True, prefix='bar', tag_prefix='bar')

        visible_tags = self.get_tags_from_bookmarks(visible_bookmarks)
        invisible_tags = self.get_tags_from_bookmarks(invisible_bookmarks)

        response = self.client.get(reverse('bookmarks:index') + '?q=foo')

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

    def test_should_list_bookmarks_and_tags_for_search_preferences(self):
        user_profile = self.user.profile
        user_profile.search_preferences = {
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        }
        user_profile.save()

        unread_bookmarks = self.setup_numbered_bookmarks(3, unread=True, with_tags=True, prefix='unread',
                                                         tag_prefix='unread')
        read_bookmarks = self.setup_numbered_bookmarks(3, unread=False, with_tags=True, prefix='read',
                                                       tag_prefix='read')

        unread_tags = self.get_tags_from_bookmarks(unread_bookmarks)
        read_tags = self.get_tags_from_bookmarks(read_bookmarks)

        response = self.client.get(reverse('bookmarks:index'))
        self.assertVisibleBookmarks(response, unread_bookmarks)
        self.assertInvisibleBookmarks(response, read_bookmarks)
        self.assertVisibleTags(response, unread_tags)
        self.assertInvisibleTags(response, read_tags)

    def test_should_display_selected_tags_from_query(self):
        tags = [
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
        ]
        self.setup_bookmark(tags=tags)

        response = self.client.get(reverse('bookmarks:index') + f'?q=%23{tags[0].name}+%23{tags[1].name.upper()}')

        self.assertSelectedTags(response, [tags[0], tags[1]])

    def test_should_not_display_search_terms_from_query_as_selected_tags_in_strict_mode(self):
        tags = [
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
        ]
        self.setup_bookmark(title=tags[0].name, tags=tags)

        response = self.client.get(reverse('bookmarks:index') + f'?q={tags[0].name}+%23{tags[1].name.upper()}')

        self.assertSelectedTags(response, [tags[1]])

    def test_should_display_search_terms_from_query_as_selected_tags_in_lax_mode(self):
        self.user.profile.tag_search = UserProfile.TAG_SEARCH_LAX
        self.user.profile.save()

        tags = [
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
            self.setup_tag(),
        ]
        self.setup_bookmark(tags=tags)

        response = self.client.get(reverse('bookmarks:index') + f'?q={tags[0].name}+%23{tags[1].name.upper()}')

        self.assertSelectedTags(response, [tags[0], tags[1]])

    def test_should_open_bookmarks_in_new_page_by_default(self):
        visible_bookmarks = self.setup_numbered_bookmarks(3)

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

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

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

        visible_bookmarks = self.setup_numbered_bookmarks(3)

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

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

    def test_edit_link_return_url_respects_search_options(self):
        bookmark = self.setup_bookmark(title='foo')
        edit_url = reverse('bookmarks:edit', args=[bookmark.id])
        base_url = reverse('bookmarks:index')

        # 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 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)

    def test_bulk_edit_respects_search_options(self):
        action_url = reverse('bookmarks:index.action')
        base_url = reverse('bookmarks:index')

        # without params
        return_url = urllib.parse.quote_plus(base_url)
        url = f'{action_url}?return_url={return_url}'

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

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

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

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

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

    def test_allowed_bulk_actions(self):
        url = reverse('bookmarks:index')
        response = self.client.get(url)
        html = response.content.decode()

        self.assertInHTML(f'''
          <select name="bulk_action" class="form-select select-sm">
            <option value="bulk_archive">Archive</option>
            <option value="bulk_delete">Delete</option>
            <option value="bulk_tag">Add tags</option>
            <option value="bulk_untag">Remove tags</option>
            <option value="bulk_read">Mark as read</option>
            <option value="bulk_unread">Mark as unread</option>
          </select>
        ''', html)

    def test_allowed_bulk_actions_with_sharing_enabled(self):
        user_profile = self.user.profile
        user_profile.enable_sharing = True
        user_profile.save()

        url = reverse('bookmarks:index')
        response = self.client.get(url)
        html = response.content.decode()

        self.assertInHTML(f'''
          <select name="bulk_action" class="form-select select-sm">
            <option value="bulk_archive">Archive</option>
            <option value="bulk_delete">Delete</option>
            <option value="bulk_tag">Add tags</option>
            <option value="bulk_untag">Remove tags</option>
            <option value="bulk_read">Mark as read</option>
            <option value="bulk_unread">Mark as unread</option>
            <option value="bulk_share">Share</option>
            <option value="bulk_unshare">Unshare</option>
          </select>
        ''', html)

    def test_apply_search_preferences(self):
        # no params
        response = self.client.post(reverse('bookmarks:index'))
        self.assertEqual(response.status_code, 302)
        self.assertEqual(response.url, reverse('bookmarks:index'))

        # some params
        response = self.client.post(reverse('bookmarks:index'), {
            'q': 'foo',
            'sort': BookmarkSearch.SORT_TITLE_ASC,
        })
        self.assertEqual(response.status_code, 302)
        self.assertEqual(response.url, reverse('bookmarks:index') + '?q=foo&sort=title_asc')

        # params with default value are removed
        response = self.client.post(reverse('bookmarks:index'), {
            'q': 'foo',
            'user': '',
            'sort': BookmarkSearch.SORT_ADDED_DESC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        })
        self.assertEqual(response.status_code, 302)
        self.assertEqual(response.url, reverse('bookmarks:index') + '?q=foo&unread=yes')

        # page is removed
        response = self.client.post(reverse('bookmarks:index'), {
            'q': 'foo',
            'page': '2',
            'sort': BookmarkSearch.SORT_TITLE_ASC,
        })
        self.assertEqual(response.status_code, 302)
        self.assertEqual(response.url, reverse('bookmarks:index') + '?q=foo&sort=title_asc')

    def test_save_search_preferences(self):
        user_profile = self.user.profile

        # no params
        self.client.post(reverse('bookmarks:index'), {
            'save': '',
        })
        user_profile.refresh_from_db()
        self.assertEqual(user_profile.search_preferences, {
            'sort': BookmarkSearch.SORT_ADDED_DESC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_OFF,
        })

        # with param
        self.client.post(reverse('bookmarks:index'), {
            'save': '',
            'sort': BookmarkSearch.SORT_TITLE_ASC,
        })
        user_profile.refresh_from_db()
        self.assertEqual(user_profile.search_preferences, {
            'sort': BookmarkSearch.SORT_TITLE_ASC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_OFF,
        })

        # add a param
        self.client.post(reverse('bookmarks:index'), {
            'save': '',
            'sort': BookmarkSearch.SORT_TITLE_ASC,
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        })
        user_profile.refresh_from_db()
        self.assertEqual(user_profile.search_preferences, {
            'sort': BookmarkSearch.SORT_TITLE_ASC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        })

        # remove a param
        self.client.post(reverse('bookmarks:index'), {
            'save': '',
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        })
        user_profile.refresh_from_db()
        self.assertEqual(user_profile.search_preferences, {
            'sort': BookmarkSearch.SORT_ADDED_DESC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_YES,
        })

        # ignores non-preferences
        self.client.post(reverse('bookmarks:index'), {
            'save': '',
            'q': 'foo',
            'user': 'john',
            'page': '3',
            'sort': BookmarkSearch.SORT_TITLE_ASC,
        })
        user_profile.refresh_from_db()
        self.assertEqual(user_profile.search_preferences, {
            'sort': BookmarkSearch.SORT_TITLE_ASC,
            'shared': BookmarkSearch.FILTER_SHARED_OFF,
            'unread': BookmarkSearch.FILTER_UNREAD_OFF,
        })

    def test_url_encode_bookmark_actions_url(self):
        url = reverse('bookmarks:index') + '?q=%23foo'
        response = self.client.get(url)
        html = response.content.decode()
        soup = self.make_soup(html)
        actions_form = soup.select('form.bookmark-actions')[0]

        self.assertEqual(actions_form.attrs['action'],
                         '/bookmarks/action?q=%23foo&return_url=%2Fbookmarks%3Fq%3D%2523foo')

    def test_encode_search_params(self):
        bookmark = self.setup_bookmark(description='alert(\'xss\')')

        url = reverse('bookmarks:index') + '?q=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')
        self.assertContains(response, bookmark.url)

        url = reverse('bookmarks:index') + '?sort=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')

        url = reverse('bookmarks:index') + '?unread=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')

        url = reverse('bookmarks:index') + '?shared=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')

        url = reverse('bookmarks:index') + '?user=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')

        url = reverse('bookmarks:index') + '?page=alert(%27xss%27)'
        response = self.client.get(url)
        self.assertNotContains(response, 'alert(\'xss\')')