import json
from datetime import datetime, timedelta, timezone
from unittest.mock import patch

import feedparser
from django.contrib.auth.models import User
from django.test import TestCase

from .models import EpisodeProgress, PodcastEpisode, PodcastFeed, PodcastQueue, PodcastSettings
from .views import _refresh_feed

_parse = feedparser.parse


def _rss(items):
    entries = ''.join(
        f'<item><guid>{guid}</guid><title>{guid}</title><pubDate>{date}</pubDate>'
        f'<enclosure url="https://example.org/{guid}.mp3" type="audio/mpeg" length="1"/></item>'
        for guid, date in items
    )
    return f'<?xml version="1.0"?><rss version="2.0"><channel><title>Feed</title>{entries}</channel></rss>'


class QueuePositionTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')
        base = datetime(2026, 1, 1, tzinfo=timezone.utc)
        self.eps = [
            PodcastEpisode.objects.create(
                feed=self.feed, guid=f'e{i}', title=f'E{i}',
                audio_url=f'https://example.org/e{i}.mp3', pub_date=base + timedelta(days=i),
            )
            for i in range(6)
        ]

    def queue(self):
        return list(PodcastQueue.objects.filter(user=self.user).order_by('position').values_list('episode_id', flat=True))

    def add(self, *episodes, **extra):
        body = {'episode_ids': [e.id for e in episodes], **extra}
        return self.client.post('/podcasts/queue/add/', json.dumps(body), content_type='application/json')

    def test_default_adds_to_the_back(self):
        self.add(self.eps[0])
        self.add(self.eps[1])
        self.assertEqual(self.queue(), [self.eps[0].id, self.eps[1].id])

    def test_front_from_setting(self):
        self.add(self.eps[0], self.eps[1])
        PodcastSettings.objects.update_or_create(user=self.user, defaults={'enqueue_position': 'front'})
        self.add(self.eps[2])
        self.assertEqual(self.queue(), [self.eps[2].id, self.eps[0].id, self.eps[1].id])

    def test_after_current_uses_client_hint(self):
        self.add(self.eps[0], self.eps[1], self.eps[2])
        self.add(self.eps[3], where='after_current', current_episode_id=self.eps[1].id)
        self.assertEqual(self.queue(), [e.id for e in (self.eps[0], self.eps[1], self.eps[3], self.eps[2])])

    def test_after_current_falls_back_to_last_listened(self):
        self.add(self.eps[0], self.eps[1], self.eps[2])
        EpisodeProgress.objects.update_or_create(user=self.user, episode=self.eps[2], defaults={'position_seconds': 30})
        self.add(self.eps[3], where='after_current')
        self.assertEqual(self.queue(), [e.id for e in (self.eps[0], self.eps[1], self.eps[2], self.eps[3])])

    def test_after_current_without_current_goes_to_front(self):
        self.add(self.eps[0])
        self.add(self.eps[1], where='after_current')
        self.assertEqual(self.queue(), [self.eps[1].id, self.eps[0].id])

    def test_already_queued_stays_where_it_is(self):
        self.add(self.eps[0], self.eps[1])
        r = self.add(self.eps[0], where='front')
        self.assertFalse(r.json()['created'])
        self.assertEqual(self.queue(), [self.eps[0].id, self.eps[1].id])

    def test_single_episode_id_still_works(self):
        r = self.client.post('/podcasts/queue/add/', json.dumps({'episode_id': self.eps[4].id}),
                             content_type='application/json')
        self.assertTrue(r.json()['created'])
        self.assertEqual(self.queue(), [self.eps[4].id])

    def test_other_users_episode_is_not_found(self):
        bob = User.objects.create_user(username='bob', password='pw12345678')
        feed = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/b', title='B')
        ep = PodcastEpisode.objects.create(feed=feed, guid='x', title='X', audio_url='https://example.org/x.mp3')
        r = self.add(ep)
        self.assertEqual(r.status_code, 404)

    def test_unknown_position_is_rejected(self):
        self.assertEqual(self.add(self.eps[0], where='middle').status_code, 400)

    def test_settings_roundtrip(self):
        r = self.client.get('/podcasts/settings/')
        self.assertEqual(r.json()['enqueue_position'], 'back')
        self.assertEqual(r.json()['auto_queue_position'], 'front')
        r = self.client.post('/podcasts/settings/', json.dumps({'auto_queue_position': 'after_current'}),
                             content_type='application/json')
        self.assertEqual(r.json()['auto_queue_position'], 'after_current')
        self.assertEqual(PodcastSettings.objects.get(user=self.user).auto_queue_position, 'after_current')
        bad = self.client.post('/podcasts/settings/', json.dumps({'enqueue_position': 'nowhere'}),
                               content_type='application/json')
        self.assertEqual(bad.status_code, 400)


class InboxRuleTests(TestCase):
    """Queued or started episodes leave the inbox; played means the last 30 s."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/f', title='F')
        self.eps = [PodcastEpisode.objects.create(feed=feed, guid=f'g{i}', title=f'E{i}', duration_seconds=3600,
                                                  audio_url=f'https://example.org/{i}.mp3') for i in range(3)]

    def inbox(self):
        return {e['id'] for e in self.client.get('/podcasts/inbox/').json()['episodes']}

    def post(self, url, body):
        return self.client.post(url, json.dumps(body), content_type='application/json')

    def test_queued_and_started_leave_the_inbox(self):
        self.assertEqual(self.inbox(), {e.id for e in self.eps})
        self.post('/podcasts/queue/add/', {'episode_ids': [self.eps[0].id]})
        self.post('/podcasts/progress/save/', {'episode_id': self.eps[1].id, 'position_seconds': 12})
        self.assertEqual(self.inbox(), {self.eps[2].id})
        p = EpisodeProgress.objects.get(user=self.user, episode=self.eps[0])
        self.assertFalse(p.played)

    def test_played_within_the_last_30_seconds(self):
        r = self.post('/podcasts/progress/save/', {'episode_id': self.eps[0].id, 'position_seconds': 3500})
        self.assertFalse(r.json()['played'])   # 90 % but 100 s left: not yet
        r = self.post('/podcasts/progress/save/', {'episode_id': self.eps[0].id, 'position_seconds': 3575})
        self.assertTrue(r.json()['played'])


class AutoQueueTests(TestCase):
    """New episodes of an auto_queue feed land where the user's setting says."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.feed = PodcastFeed.objects.create(
            user=self.user, rss_url='https://example.org/feed', title='Feed', auto_queue=True,
            last_refreshed_at=datetime(2026, 1, 1, tzinfo=timezone.utc),  # not the first fetch
        )
        other = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/o', title='O')
        self.old = [
            PodcastEpisode.objects.create(feed=other, guid=f'o{i}', title=f'O{i}', audio_url=f'https://example.org/o{i}.mp3')
            for i in range(3)
        ]
        for i, ep in enumerate(self.old):
            PodcastQueue.objects.create(user=self.user, episode=ep, position=i)
        self.rss = _rss([
            ('new1', 'Mon, 05 Jan 2026 10:00:00 GMT'),
            ('new2', 'Tue, 06 Jan 2026 10:00:00 GMT'),
        ])

    def refresh(self):
        with patch('podcasts.views._fetch_feed', lambda url: _parse(self.rss)):
            _refresh_feed(self.feed)
        order = PodcastQueue.objects.filter(user=self.user).order_by('position')
        return [q.episode.guid for q in order]

    def test_front_is_the_default(self):
        self.assertEqual(self.refresh(), ['new2', 'new1', 'o0', 'o1', 'o2'])

    def test_back_appends_oldest_first(self):
        PodcastSettings.objects.create(user=self.user, auto_queue_position='back')
        self.assertEqual(self.refresh(), ['o0', 'o1', 'o2', 'new1', 'new2'])

    def test_after_current(self):
        PodcastSettings.objects.create(user=self.user, auto_queue_position='after_current')
        EpisodeProgress.objects.create(user=self.user, episode=self.old[1], position_seconds=12)
        self.assertEqual(self.refresh(), ['o0', 'o1', 'new2', 'new1', 'o2'])

    def test_feed_without_auto_queue_queues_nothing(self):
        self.feed.auto_queue = False
        self.feed.save()
        self.assertEqual(self.refresh(), ['o0', 'o1', 'o2'])


class FirstFetchTests(TestCase):
    """A new subscription doesn't flood the inbox with its back catalogue."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.rss = _rss([(f'e{i}', f'Mon, {i + 1:02d} Jan 2026 10:00:00 GMT') for i in range(5)])

    def subscribe(self):
        with patch('podcasts.views._fetch_feed', lambda url: _parse(self.rss)):
            return self.client.post('/podcasts/feeds/add/', json.dumps({'rss_url': 'https://example.org/f'}),
                                    content_type='application/json')

    def test_only_the_newest_is_new(self):
        self.assertEqual(self.subscribe().json()['new_episodes'], 5)
        inbox = self.client.get('/podcasts/inbox/').json()['episodes']
        self.assertEqual([e['title'] for e in inbox], ['e4'])
        # The others are still listed for the podcast, not marked played.
        feed = PodcastFeed.objects.get(user=self.user)
        eps = self.client.get(f'/podcasts/feeds/{feed.id}/episodes/').json()['episodes']
        self.assertEqual(len(eps), 5)
        self.assertFalse(any(e['played'] for e in eps))

    def test_later_fetches_keep_every_new_episode(self):
        self.subscribe()
        feed = PodcastFeed.objects.get(user=self.user)
        self.rss = _rss([(f'e{i}', f'Mon, {i + 1:02d} Jan 2026 10:00:00 GMT') for i in range(8)])
        with patch('podcasts.views._fetch_feed', lambda url: _parse(self.rss)):
            _refresh_feed(feed)
        inbox = self.client.get('/podcasts/inbox/').json()['episodes']
        self.assertEqual([e['title'] for e in inbox], ['e7', 'e6', 'e5', 'e4'])


class RefreshAllTests(TestCase):
    """One request refreshes all feeds on the server; one request returns the state."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.a = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/a', title='A')
        self.b = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/b', title='B')
        bob = User.objects.create_user(username='bob', password='pw12345678')
        self.bobs = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/a', title='A')
        self.fetched = []

    def fake_fetch(self, url):
        self.fetched.append(url)
        if url.endswith('/b'):
            raise ValueError('broken feed')
        return _parse(_rss([(url[-1] + '1', 'Mon, 05 Jan 2026 10:00:00 GMT')]))

    def test_refresh_all_reports_counts_and_skips_recent(self):
        with patch('podcasts.views._fetch_feed', self.fake_fetch):
            r = self.client.post('/podcasts/feeds/refresh-all/', '{}', content_type='application/json')
        self.assertEqual(r.json(), {'ok': True, 'refreshed': 1, 'failed': 1, 'new_episodes': 1})
        self.assertEqual(sorted(self.fetched), ['https://example.org/a', 'https://example.org/b'])
        # A was just refreshed: a second call within max_age only retries B.
        self.fetched.clear()
        with patch('podcasts.views._fetch_feed', self.fake_fetch):
            self.client.post('/podcasts/feeds/refresh-all/', '{}', content_type='application/json')
        self.assertEqual(self.fetched, ['https://example.org/b'])

    def test_a_shared_feed_url_is_fetched_once(self):
        from .views import _refresh_feeds
        with patch('podcasts.views._fetch_feed', self.fake_fetch):
            refreshed, failed, new = _refresh_feeds([self.a, self.bobs])
        self.assertEqual(self.fetched, ['https://example.org/a'])
        self.assertEqual((refreshed, failed, new), (2, 0, 2))

    def test_state_in_one_response(self):
        ep = PodcastEpisode.objects.create(feed=self.a, guid='x', title='X', audio_url='https://example.org/x.mp3')
        PodcastQueue.objects.create(user=self.user, episode=ep, position=0)
        r = self.client.get('/podcasts/state/')
        data = r.json()
        self.assertEqual({f['title'] for f in data['feeds']}, {'A', 'B'})
        self.assertEqual([q['episode__id'] for q in data['queue']], [ep.id])
        self.assertEqual([e['id'] for e in data['inbox']], [ep.id])
        self.assertTrue(data['inbox'][0]['in_queue'])
        # Shownotes stay out of the one-request state (they can be large).
        self.assertNotIn('description', data['inbox'][0])
        self.assertEqual(data['settings'], {'enqueue_position': 'back', 'auto_queue_position': 'front'})


# ---------------------------------------------------------------------------
# Shownotes, chapters, transcripts
# ---------------------------------------------------------------------------

NS = (
    'xmlns:podcast="https://podcastindex.org/namespace/1.0" '
    'xmlns:psc="http://podlove.org/simple-chapters" '
    'xmlns:content="http://purl.org/rss/1.0/modules/content/" '
    'xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"'
)


def _rich_rss(items, ns=NS):
    """Like _rss, but each item is (guid, extra XML inside the <item>)."""
    entries = ''.join(
        f'<item><guid>{guid}</guid><title>{guid}</title><pubDate>Mon, 05 Jan 2026 10:00:00 GMT</pubDate>'
        f'<enclosure url="https://example.org/{guid}.mp3" type="audio/mpeg" length="1"/>{extra}</item>'
        for guid, extra in items
    )
    return f'<?xml version="1.0"?><rss version="2.0" {ns}><channel><title>Feed</title>{entries}</channel></rss>'


PSC = (
    '<psc:chapters version="1.2">'
    '<psc:chapter start="00:00:00" title="Intro"/>'
    '<psc:chapter start="00:01:02.500" title="Teil &amp; zwei" href="https://x.org/2" image="https://x.org/2.jpg"/>'
    '<psc:chapter start="1:02:03" title="Drei"/>'
    '<psc:chapter start="12:05" title="Kurz"/>'
    '</psc:chapters>'
)
TRANSCRIPTS = (
    '<podcast:transcript url="https://example.org/a.vtt" type="text/vtt" language="de"/>'
    '<podcast:transcript url="https://example.org/a.srt" type="application/srt" rel="captions"/>'
    '<podcast:transcript url="javascript:alert(1)" type="text/html"/>'
)
CHAPTERS_JSON = {
    'version': '1.2.0',
    'chapters': [
        {'startTime': 95.5, 'title': 'Zweites', 'url': 'https://x.org/b', 'img': 'https://x.org/b.jpg'},
        {'startTime': 0, 'title': 'Erstes'},
        {'startTime': 50, 'title': 'Nur Bild', 'toc': False},
        {'startTime': 'kaputt', 'title': 'Ungültig'},
        {'startTime': 120, 'title': 'Link', 'url': 'javascript:alert(1)'},
    ],
}


class FeedExtrasParsingTests(TestCase):
    """What feedparser (6.0.x) hands us for these tags, and what we store."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')

    def refresh(self, rss):
        with patch('podcasts.views._fetch_feed', lambda url: _parse(rss)):
            _refresh_feed(self.feed)

    def test_feedparser_keys(self):
        import podcasts.views  # noqa: F401 -- installs the feedparser extension
        rss = _rich_rss([('a', PSC + TRANSCRIPTS + '<podcast:chapters url="https://x.org/c.json" '
                                'type="application/json+chapters"/>')])
        entry = _parse(rss).entries[0]
        self.assertEqual(entry['podcast_chapters']['url'], 'https://x.org/c.json')
        self.assertEqual([t['url'] for t in entry['podcast_transcripts']],
                         ['https://example.org/a.vtt', 'https://example.org/a.srt', 'javascript:alert(1)'])
        self.assertEqual(entry['psc_chapters']['chapters'][1]['start'], '00:01:02.500')

    def test_other_prefix_for_the_podcast_namespace(self):
        ns = NS.replace('xmlns:podcast=', 'xmlns:pc=')
        rss = _rich_rss([('a', '<pc:transcript url="https://example.org/a.vtt" type="text/vtt"/>'
                               '<pc:chapters url="https://x.org/c.json" type="application/json+chapters"/>')], ns)
        self.refresh(rss)
        ep = PodcastEpisode.objects.get()
        self.assertEqual(ep.chapters_url, 'https://x.org/c.json')
        self.assertEqual(ep.transcripts, [{'url': 'https://example.org/a.vtt', 'type': 'text/vtt', 'language': ''}])

    def test_psc_chapters(self):
        self.refresh(_rich_rss([('a', PSC)]))
        ep = PodcastEpisode.objects.get()
        self.assertEqual(ep.chapters, [
            {'start': 0.0, 'title': 'Intro'},
            {'start': 62.5, 'title': 'Teil & zwei', 'url': 'https://x.org/2', 'img': 'https://x.org/2.jpg'},
            {'start': 725.0, 'title': 'Kurz'},
            {'start': 3723.0, 'title': 'Drei'},
        ])
        self.assertEqual(ep.chapters_url, '')

    def test_transcripts_and_chapters_url(self):
        self.refresh(_rich_rss([('a', TRANSCRIPTS + '<podcast:chapters url="https://x.org/c.json" '
                                      'type="application/json+chapters"/>')]))
        ep = PodcastEpisode.objects.get()
        self.assertEqual(ep.transcripts, [
            {'url': 'https://example.org/a.vtt', 'type': 'text/vtt', 'language': 'de'},
            {'url': 'https://example.org/a.srt', 'type': 'application/srt', 'language': ''},
        ])
        self.assertEqual(ep.chapters_url, 'https://x.org/c.json')
        self.assertEqual(ep.chapters, [])
        self.assertIsNone(ep.chapters_fetched_at)

    def test_content_encoded_is_preferred(self):
        self.refresh(_rich_rss([
            ('a', '<description>Kurz</description>'
                  '<content:encoded><![CDATA[<p>Lang <a href="https://x.org">Link</a></p>]]></content:encoded>'),
            ('b', '<description>Nur kurz</description>'),
        ]))
        self.assertIn('Lang', PodcastEpisode.objects.get(guid='a').description)
        self.assertEqual(PodcastEpisode.objects.get(guid='b').description, 'Nur kurz')

    def test_existing_episodes_are_updated(self):
        self.refresh(_rich_rss([('a', '<description>Alt</description>'), ('b', '<description>Gleich</description>')]))
        a, b = PodcastEpisode.objects.get(guid='a'), PodcastEpisode.objects.get(guid='b')
        rss = _rich_rss([
            ('a', '<description>Neu</description>' + PSC + TRANSCRIPTS),
            ('b', '<description>Gleich</description>'),
        ])
        with patch('podcasts.views.PodcastEpisode.objects.bulk_update',
                   wraps=PodcastEpisode.objects.bulk_update) as bulk:
            self.refresh(rss)
        # Only the episode that changed is written.
        self.assertEqual([e.guid for e in bulk.call_args.args[0]], ['a'])
        a.refresh_from_db()
        self.assertEqual(a.description, 'Neu')
        self.assertEqual(len(a.chapters), 4)
        self.assertEqual(len(a.transcripts), 2)
        self.assertEqual(PodcastEpisode.objects.count(), 2)
        # Nothing changed: nothing written.
        with patch('podcasts.views.PodcastEpisode.objects.bulk_update') as bulk:
            self.refresh(rss)
        bulk.assert_not_called()

    def test_fetched_chapters_survive_a_refresh_until_the_url_changes(self):
        tag = '<podcast:chapters url="https://x.org/{}.json" type="application/json+chapters"/>'
        self.refresh(_rich_rss([('a', tag.format('c1'))]))
        fetched = datetime(2026, 1, 2, tzinfo=timezone.utc)
        PodcastEpisode.objects.update(chapters=[{'start': 0.0, 'title': 'X'}], chapters_fetched_at=fetched)
        self.refresh(_rich_rss([('a', tag.format('c1'))]))
        ep = PodcastEpisode.objects.get()
        self.assertEqual(ep.chapters, [{'start': 0.0, 'title': 'X'}])
        self.assertEqual(ep.chapters_fetched_at, fetched)
        self.refresh(_rich_rss([('a', tag.format('c2'))]))
        ep.refresh_from_db()
        self.assertEqual((ep.chapters_url, ep.chapters, ep.chapters_fetched_at), ('https://x.org/c2.json', [], None))


class ShownotesTests(TestCase):
    def test_sanitizer(self):
        from .shownotes import sanitize_html
        dirty = (
            '<p onclick="steal()">Hallo <a href="https://x.org/a?b=1&amp;c=2" onmouseover="x()" target="_top">Link</a>'
            '<script>alert(1)</script><style>p{}</style><iframe src="https://evil.org">drin</iframe>'
            '<a href="javascript:alert(1)">böse</a><a href=" JaVa\tScript:alert(1)">auch</a>'
            '<img src="data:image/png;base64,AAA"><img src="https://x.org/i.png" onerror="x()">'
            '<unknown>Text bleibt</unknown><b>offen'
        )
        self.assertEqual(
            sanitize_html(dirty),
            '<p>Hallo <a href="https://x.org/a?b=1&amp;c=2" rel="nofollow noopener noreferrer">Link</a>'
            '<a rel="nofollow noopener noreferrer">böse</a><a rel="nofollow noopener noreferrer">auch</a>'
            '<img src="https://x.org/i.png">Text bleibt<b>offen</b></p>',
        )
        self.assertEqual(sanitize_html('1 &lt; 2 &amp;&amp; <i>3</i>'), '1 &lt; 2 &amp;&amp; <i>3</i>')
        self.assertEqual(sanitize_html('<a href="mailto:a@b.org">Mail</a>'),
                         '<a href="mailto:a@b.org" rel="nofollow noopener noreferrer">Mail</a>')

    def test_timestamps(self):
        from .shownotes import extract_timestamps
        notes = (
            '<p>Kapitel:<br>00:00 Intro<br>(12:34) - Thema eins<br>1:02:03 Zum Schluss</p>'
            '<ul><li>[05:07] Liste</li><li>Um 20:15 geht es los</li><li>99:99 kaputt</li></ul>'
        )
        self.assertEqual(extract_timestamps(notes), [
            {'seconds': 0, 'label': 'Intro'},
            {'seconds': 754, 'label': 'Thema eins'},
            {'seconds': 3723, 'label': 'Zum Schluss'},
            {'seconds': 307, 'label': 'Liste'},
        ])
        self.assertEqual(len(extract_timestamps(notes, duration_seconds=1000)), 3)


class _FakeResponse:
    def __init__(self, body=b'', status=200, headers=None):
        self.body, self.status_code, self.headers = body, status, headers or {}
        self.raw = None

    def iter_content(self, chunk_size=1):
        yield self.body

    def close(self):
        pass


class EpisodeDetailTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed',
                                               artwork_url='https://example.org/art.jpg')
        self.ep = PodcastEpisode.objects.create(
            feed=self.feed, guid='a', title='A', audio_url='https://example.org/a.mp3', duration_seconds=3600,
            pub_date=datetime(2026, 1, 5, 10, tzinfo=timezone.utc),
            description='<p>Hallo<script>alert(1)</script><br>01:02 Thema <a href="https://x.org">x</a></p>',
            transcripts=[{'url': 'https://example.org/a.vtt', 'type': 'text/vtt', 'language': 'de'}],
            chapters_url='https://x.org/c.json',
        )
        self.requests = []

    def fake_get(self, url, **kwargs):
        self.requests.append(url)
        return _FakeResponse(json.dumps(CHAPTERS_JSON).encode())

    def get(self, ep=None):
        with patch('podcasts.chapters.assert_safe_url'), patch('podcasts.chapters.requests.get', self.fake_get):
            return self.client.get(f'/podcasts/episodes/{(ep or self.ep).id}/')

    def test_detail(self):
        EpisodeProgress.objects.create(user=self.user, episode=self.ep, position_seconds=42)
        r = self.get()
        self.assertEqual(r.status_code, 200)
        data = r.json()
        self.assertEqual(data['description'], '<p>Hallo<br>01:02 Thema <a href="https://x.org" '
                                              'rel="nofollow noopener noreferrer">x</a></p>')
        self.assertEqual(data['timestamps'], [{'seconds': 62, 'label': 'Thema x'}])
        self.assertEqual(data['transcripts'], self.ep.transcripts)
        self.assertIs(data['has_transcript'], True)
        self.assertEqual(data['feed'], {'id': self.feed.id, 'title': 'Feed',
                                        'artwork_url': 'https://example.org/art.jpg'})
        self.assertEqual((data['position_seconds'], data['played'], data['in_queue']), (42, False, False))
        self.assertEqual(data['pub_date'], '2026-01-05T10:00:00+00:00')
        self.assertEqual(data['chapters'], [
            {'start': 0.0, 'title': 'Erstes'},
            {'start': 95.5, 'title': 'Zweites', 'url': 'https://x.org/b', 'img': 'https://x.org/b.jpg'},
            {'start': 120.0, 'title': 'Link'},
        ])

    def test_chapters_are_fetched_once(self):
        self.get()
        self.get()
        self.assertEqual(self.requests, ['https://x.org/c.json'])
        self.ep.refresh_from_db()
        self.assertEqual(len(self.ep.chapters), 3)
        self.assertIsNotNone(self.ep.chapters_fetched_at)

    def test_inline_chapters_need_no_fetch(self):
        self.ep.chapters = [{'start': 0.0, 'title': 'Inline'}]
        self.ep.save()
        self.assertEqual(self.get().json()['chapters'], [{'start': 0.0, 'title': 'Inline'}])
        self.assertEqual(self.requests, [])

    def test_redirect_is_followed_and_rechecked(self):
        def fake_get(url, **kwargs):
            self.requests.append(url)
            if url.endswith('c.json'):
                return _FakeResponse(status=302, headers={'Location': '/real.json'})
            return _FakeResponse(json.dumps(CHAPTERS_JSON).encode())
        with patch('podcasts.chapters.assert_safe_url') as check, patch('podcasts.chapters.requests.get', fake_get):
            r = self.client.get(f'/podcasts/episodes/{self.ep.id}/')
        self.assertEqual(len(r.json()['chapters']), 3)
        self.assertEqual([c.args[0] for c in check.call_args_list], ['https://x.org/c.json', 'https://x.org/real.json'])

    def test_private_chapters_url_is_refused_and_remembered(self):
        self.ep.chapters_url = 'http://127.0.0.1/c.json'
        self.ep.audio_url = 'http://127.0.0.1/a.mp3'  # the ID3 fallback is refused too
        self.ep.save()
        with patch('podcasts.chapters.requests.get', self.fake_get):
            r = self.client.get(f'/podcasts/episodes/{self.ep.id}/')
        self.assertEqual(r.json()['chapters'], [])
        self.assertEqual(self.requests, [])
        self.ep.refresh_from_db()
        self.assertIsNotNone(self.ep.chapters_fetched_at)

    def test_oversized_or_broken_chapters(self):
        from . import chapters
        with patch('podcasts.chapters.assert_safe_url'), patch(
            'podcasts.chapters.requests.get',
            lambda url, **kw: _FakeResponse(b'x' * (chapters.CHAPTERS_MAX_BYTES + 1)),
        ):
            with self.assertRaises(chapters.ChaptersInvalid):
                chapters.fetch('https://x.org/big.json')
        with patch('podcasts.chapters.assert_safe_url'), patch(
            'podcasts.chapters.requests.get', lambda url, **kw: _FakeResponse(b'{"chapters": 3}'),
        ):
            with self.assertRaises(chapters.ChaptersInvalid):
                chapters.fetch('https://x.org/odd.json')

    def test_server_error_is_retried_later(self):
        with patch('podcasts.chapters.assert_safe_url'), patch(
            'podcasts.chapters.requests.get', lambda url, **kw: _FakeResponse(status=503),
        ):
            r = self.client.get(f'/podcasts/episodes/{self.ep.id}/')
        self.assertEqual(r.json()['chapters'], [])
        self.ep.refresh_from_db()
        self.assertIsNone(self.ep.chapters_fetched_at)

    def test_other_users_episode_is_not_found(self):
        bob = User.objects.create_user(username='bob', password='pw12345678')
        feed = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/b', title='B')
        ep = PodcastEpisode.objects.create(feed=feed, guid='x', title='X', audio_url='https://example.org/x.mp3',
                                           chapters_url='https://x.org/c.json')
        self.assertEqual(self.get(ep).status_code, 404)
        self.assertEqual(self.requests, [])

    def test_login_required(self):
        self.client.logout()
        self.assertEqual(self.get().status_code, 401)

    def test_favorite_and_last_played_at(self):
        r = self.get().json()
        self.assertEqual((r['favorite'], r['last_played_at']), (False, None))
        p = EpisodeProgress.objects.create(user=self.user, episode=self.ep, position_seconds=5, favorite=True)
        EpisodeProgress.objects.filter(pk=p.pk).update(updated_at=datetime(2026, 2, 3, 8, tzinfo=timezone.utc))
        r = self.get().json()
        self.assertEqual((r['favorite'], r['last_played_at']), (True, '2026-02-03T08:00:00+00:00'))


# ---------------------------------------------------------------------------
# Favorites, episode list, statistics, OPML export
# ---------------------------------------------------------------------------

def _at(month, day):
    return datetime(2026, month, day, 9, tzinfo=timezone.utc)


def _progress(user, episode, updated_at, **fields):
    p = EpisodeProgress.objects.create(user=user, episode=episode, **fields)
    # auto_now would overwrite updated_at on save(); update() doesn't.
    EpisodeProgress.objects.filter(pk=p.pk).update(updated_at=updated_at)
    return p


class FavoriteTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')
        self.ep = PodcastEpisode.objects.create(feed=feed, guid='a', title='A', audio_url='https://example.org/a.mp3')

    def post(self, body=None, ep=None):
        return self.client.post(f'/podcasts/episodes/{(ep or self.ep).id}/favorite/',
                                '' if body is None else json.dumps(body), content_type='application/json')

    def test_toggle_creates_the_progress_row(self):
        self.assertFalse(EpisodeProgress.objects.exists())
        self.assertEqual(self.post().json(), {'ok': True, 'favorite': True})
        p = EpisodeProgress.objects.get(user=self.user, episode=self.ep)
        self.assertTrue(p.favorite)
        self.assertEqual((p.played, p.dismissed, p.position_seconds), (False, False, 0))
        self.assertEqual(self.post({}).json(), {'ok': True, 'favorite': False})
        self.assertFalse(EpisodeProgress.objects.get(pk=p.pk).favorite)

    def test_set_explicitly(self):
        self.assertEqual(self.post({'favorite': True}).json()['favorite'], True)
        self.assertEqual(self.post({'favorite': True}).json()['favorite'], True)
        self.assertTrue(EpisodeProgress.objects.get().favorite)
        self.assertEqual(self.post({'favorite': False}).json()['favorite'], False)
        self.assertEqual(self.post({'favorite': False}).json()['favorite'], False)
        self.assertFalse(EpisodeProgress.objects.get().favorite)

    def test_starring_keeps_the_listening_time(self):
        p = _progress(self.user, self.ep, _at(2, 1), position_seconds=30)
        self.post({'favorite': True})
        p.refresh_from_db()
        self.assertTrue(p.favorite)
        self.assertEqual((p.position_seconds, p.updated_at), (30, _at(2, 1)))

    def test_owner_only(self):
        bob = User.objects.create_user(username='bob', password='pw12345678')
        feed = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/b', title='B')
        ep = PodcastEpisode.objects.create(feed=feed, guid='x', title='X', audio_url='https://example.org/x.mp3')
        self.assertEqual(self.post({'favorite': True}, ep).status_code, 404)
        self.assertFalse(EpisodeProgress.objects.exists())
        self.assertEqual(self.client.post('/podcasts/episodes/999999/favorite/', '{}',
                                          content_type='application/json').status_code, 404)

    def test_login_and_post_required(self):
        self.assertEqual(self.client.get(f'/podcasts/episodes/{self.ep.id}/favorite/').status_code, 405)
        self.client.logout()
        self.assertEqual(self.post({'favorite': True}).status_code, 401)


class EpisodeListTests(TestCase):
    """GET /podcasts/episodes/: all feeds, filters, history, search, pages."""

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.fa = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/a', title='Alpha',
                                             artwork_url='https://example.org/a.jpg')
        self.fb = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/b', title='Beta')

        def ep(feed, guid, title, pub_date, **kw):
            return PodcastEpisode.objects.create(feed=feed, guid=guid, title=title, pub_date=pub_date,
                                                 audio_url=f'https://example.org/{guid}.mp3',
                                                 description='x' * 1000, **kw)

        self.a1 = ep(self.fa, 'a1', 'A1', _at(1, 1), duration_seconds=600)
        self.a2 = ep(self.fa, 'a2', 'A2', _at(1, 2))
        self.a3 = ep(self.fa, 'a3', 'A3', _at(1, 3))
        self.a4 = ep(self.fa, 'a4', 'A4 ohne Datum', None)
        self.b1 = ep(self.fb, 'b1', 'Bonus Talk', _at(1, 4))
        self.b2 = ep(self.fb, 'b2', 'B2', _at(1, 5))
        _progress(self.user, self.a1, _at(2, 1), played=True)
        _progress(self.user, self.a2, _at(2, 3), position_seconds=100)
        _progress(self.user, self.b1, _at(2, 2), position_seconds=50)
        _progress(self.user, self.a3, _at(2, 5), favorite=True)
        _progress(self.user, self.b2, _at(2, 4), dismissed=True)  # e.g. back catalogue of a new subscription
        PodcastQueue.objects.create(user=self.user, episode=self.a2, position=0)
        # Someone else's listening must not show up.
        bob = User.objects.create_user(username='bob', password='pw12345678')
        fbob = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/a', title='Alpha')
        xb = PodcastEpisode.objects.create(feed=fbob, guid='a1', title='A1', audio_url='https://example.org/a1.mp3',
                                           pub_date=_at(1, 9))
        _progress(bob, xb, _at(3, 1), played=True, favorite=True)
        _progress(bob, self.a3, _at(3, 1), played=True, position_seconds=10)  # can't happen, but must not leak

    def get(self, **params):
        r = self.client.get('/podcasts/episodes/', params)
        self.assertEqual(r.status_code, 200)
        return r.json()

    def ids(self, **params):
        return [e['id'] for e in self.get(**params)['episodes']]

    def test_all_newest_first_without_date_last(self):
        data = self.get()
        self.assertEqual([e['id'] for e in data['episodes']],
                         [e.id for e in (self.b2, self.b1, self.a3, self.a2, self.a1, self.a4)])
        self.assertEqual((data['offset'], data['limit'], data['total']), (0, 100, 6))
        self.assertEqual(self.ids(filter='all'), [e['id'] for e in data['episodes']])

    def test_episode_fields(self):
        eps = {e['id']: e for e in self.get()['episodes']}
        self.assertEqual(eps[self.a2.id], {
            'id': self.a2.id, 'title': 'A2', 'audio_url': 'https://example.org/a2.mp3', 'duration_seconds': 0,
            'pub_date': '2026-01-02T09:00:00+00:00', 'artwork_url': '',
            'feed__id': self.fa.id, 'feed__title': 'Alpha', 'feed__artwork_url': 'https://example.org/a.jpg',
            'position_seconds': 100, 'played': False, 'favorite': False, 'in_queue': True,
            'last_played_at': '2026-02-03T09:00:00+00:00',
        })
        a4 = eps[self.a4.id]
        self.assertEqual((a4['pub_date'], a4['last_played_at'], a4['position_seconds'], a4['played'],
                          a4['favorite'], a4['in_queue']), (None, None, 0, False, False, False))
        self.assertEqual(eps[self.a3.id]['favorite'], True)
        self.assertEqual(eps[self.a3.id]['played'], False)  # bob's row doesn't count
        self.assertEqual(eps[self.a1.id]['played'], True)

    def test_unplayed(self):
        # Dismissed episodes (b2) are still listed.
        self.assertEqual(self.ids(filter='unplayed'), [e.id for e in (self.b2, self.b1, self.a3, self.a2, self.a4)])

    def test_in_progress_by_publication_date(self):
        self.assertEqual(self.ids(filter='in_progress'), [self.b1.id, self.a2.id])

    def test_played(self):
        self.assertEqual(self.ids(filter='played'), [self.a1.id])

    def test_favorites(self):
        self.assertEqual(self.ids(filter='favorites'), [self.a3.id])

    def test_history_last_listened_first(self):
        data = self.get(filter='history')
        self.assertEqual([e['id'] for e in data['episodes']], [self.a2.id, self.b1.id, self.a1.id])
        self.assertEqual([e['last_played_at'] for e in data['episodes']],
                         ['2026-02-03T09:00:00+00:00', '2026-02-02T09:00:00+00:00', '2026-02-01T09:00:00+00:00'])
        self.assertEqual(data['total'], 3)
        # Listening again moves an episode to the top.
        self.client.post('/podcasts/progress/save/', json.dumps({'episode_id': self.a1.id, 'position_seconds': 20}),
                         content_type='application/json')
        self.assertEqual(self.ids(filter='history'), [self.a1.id, self.a2.id, self.b1.id])

    def test_feed_id_and_q(self):
        self.assertEqual(self.ids(feed_id=self.fb.id), [self.b2.id, self.b1.id])
        self.assertEqual(self.ids(q='BONUS'), [self.b1.id])
        self.assertEqual(self.ids(q='ohne dat'), [self.a4.id])
        self.assertEqual(self.ids(filter='history', feed_id=self.fa.id), [self.a2.id, self.a1.id])
        self.assertEqual(self.ids(filter='in_progress', q='a2'), [self.a2.id])
        data = self.get(feed_id=self.fb.id, q='nothing')
        self.assertEqual((data['episodes'], data['total']), ([], 0))
        bobs_feed = PodcastFeed.objects.get(user__username='bob')
        self.assertEqual(self.ids(feed_id=bobs_feed.id), [])

    def test_pages(self):
        data = self.get(offset=1, limit=2)
        self.assertEqual([e['id'] for e in data['episodes']], [self.b1.id, self.a3.id])
        self.assertEqual((data['offset'], data['limit'], data['total']), (1, 2, 6))
        data = self.get(offset=5, limit=2)
        self.assertEqual(([e['id'] for e in data['episodes']], data['total']), ([self.a4.id], 6))
        data = self.get(offset=10)
        self.assertEqual((data['episodes'], data['total']), ([], 6))
        self.assertEqual(self.get(limit=10000)['limit'], 500)
        self.assertEqual(self.get(offset=-3)['offset'], 0)
        data = self.get(filter='history', limit=1, offset=1)
        self.assertEqual(([e['id'] for e in data['episodes']], data['total']), ([self.b1.id], 3))

    def test_query_count_does_not_grow_with_the_page(self):
        from .views import _episode_list_data
        for i in range(20):
            e = PodcastEpisode.objects.create(feed=self.fb, guid=f'n{i}', title=f'N{i}',
                                              audio_url=f'https://example.org/n{i}.mp3', pub_date=_at(1, 10))
            _progress(self.user, e, _at(2, 10), position_seconds=i + 1)
            PodcastQueue.objects.create(user=self.user, episode=e, position=i + 1)
        with self.assertNumQueries(2):
            episodes, total = _episode_list_data(self.user, 'history')
        self.assertEqual((len(episodes), total), (23, 23))

    def test_bad_parameters(self):
        self.assertEqual(self.client.get('/podcasts/episodes/', {'filter': 'new'}).status_code, 400)
        self.assertEqual(self.client.get('/podcasts/episodes/', {'limit': 'ten'}).status_code, 400)
        self.assertEqual(self.client.get('/podcasts/episodes/', {'feed_id': 'x'}).status_code, 400)

    def test_login_required(self):
        self.client.logout()
        self.assertEqual(self.client.get('/podcasts/episodes/').status_code, 401)


class StatsTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.fa = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/a', title='Alpha',
                                             artwork_url='https://example.org/a.jpg')
        self.fb = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/b', title='Beta')
        self.fc = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/c', title='Gamma')

        def ep(feed, guid, duration):
            return PodcastEpisode.objects.create(feed=feed, guid=guid, title=guid, duration_seconds=duration,
                                                 audio_url=f'https://example.org/{guid}.mp3')

        now = datetime.now(timezone.utc)
        _progress(self.user, ep(self.fa, 'a1', 3600), now, played=True, position_seconds=50)  # 3600
        _progress(self.user, ep(self.fa, 'a2', 1000), now, position_seconds=300)  # 300, started
        _progress(self.user, ep(self.fa, 'a3', 0), now, played=True, position_seconds=120)  # 120: no length
        _progress(self.user, ep(self.fb, 'b1', 900), now - timedelta(days=30), position_seconds=200)  # 200, started
        _progress(self.user, ep(self.fc, 'c1', 500), now, dismissed=True, favorite=True)  # 0
        bob = User.objects.create_user(username='bob', password='pw12345678')
        fbob = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/a', title='Alpha')
        _progress(bob, ep(fbob, 'x', 999), now, played=True)

    def test_all_time(self):
        r = self.client.get('/podcasts/stats/')
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.json(), {
            'total_seconds': 4220,
            'episodes_played': 2,
            'episodes_started': 2,
            'since': None,
            'feeds': [
                {'feed_id': self.fa.id, 'title': 'Alpha', 'artwork_url': 'https://example.org/a.jpg',
                 'seconds': 4020, 'episodes_played': 2},
                {'feed_id': self.fb.id, 'title': 'Beta', 'artwork_url': '', 'seconds': 200, 'episodes_played': 0},
            ],
        })

    def test_last_days(self):
        before = datetime.now(timezone.utc)
        data = self.client.get('/podcasts/stats/', {'days': 7}).json()
        self.assertEqual((data['total_seconds'], data['episodes_played'], data['episodes_started']), (4020, 2, 1))
        self.assertEqual([f['feed_id'] for f in data['feeds']], [self.fa.id])
        since = datetime.fromisoformat(data['since'])
        self.assertAlmostEqual((before - since).total_seconds(), 7 * 86400, delta=60)
        data = self.client.get('/podcasts/stats/', {'days': 60}).json()
        self.assertEqual(data['total_seconds'], 4220)
        self.assertEqual([f['feed_id'] for f in data['feeds']], [self.fa.id, self.fb.id])

    def test_empty(self):
        EpisodeProgress.objects.filter(user=self.user).delete()
        self.assertEqual(self.client.get('/podcasts/stats/').json(), {
            'total_seconds': 0, 'episodes_played': 0, 'episodes_started': 0, 'since': None, 'feeds': [],
        })

    def test_bad_days_and_login(self):
        self.assertEqual(self.client.get('/podcasts/stats/', {'days': 'week'}).status_code, 400)
        self.assertEqual(self.client.get('/podcasts/stats/', {'days': -1}).status_code, 400)
        self.client.logout()
        self.assertEqual(self.client.get('/podcasts/stats/').status_code, 401)


class OpmlExportTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed?a=1&b=2',
                                   title='Tom & Jerry "Live" <Folge>', link='https://example.org/?x=1&y=2')
        PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/plain', title="Bob's Podcast")
        bob = User.objects.create_user(username='bob', password='pw12345678')
        PodcastFeed.objects.create(user=bob, rss_url='https://example.org/secret', title='Secret')

    def test_export(self):
        import xml.etree.ElementTree as ET
        r = self.client.get('/podcasts/feeds/export.opml')
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r['Content-Type'], 'text/x-opml; charset=utf-8')
        self.assertEqual(r['Content-Disposition'], 'attachment; filename="diora-podcasts.opml"')
        raw = r.content.decode('utf-8')
        self.assertIn('Tom &amp; Jerry &quot;Live&quot; &lt;Folge&gt;', raw)
        self.assertIn('xmlUrl="https://example.org/feed?a=1&amp;b=2"', raw)
        self.assertNotIn('Secret', raw)
        root = ET.fromstring(r.content)
        self.assertEqual(root.tag, 'opml')
        self.assertEqual(root.get('version'), '2.0')
        self.assertEqual(root.findtext('head/title'), 'diora Podcasts')
        outlines = [o.attrib for o in root.iter('outline')]
        self.assertEqual(outlines, [
            {'type': 'rss', 'text': "Bob's Podcast", 'title': "Bob's Podcast",
             'xmlUrl': 'https://example.org/plain', 'htmlUrl': ''},
            {'type': 'rss', 'text': 'Tom & Jerry "Live" <Folge>', 'title': 'Tom & Jerry "Live" <Folge>',
             'xmlUrl': 'https://example.org/feed?a=1&b=2', 'htmlUrl': 'https://example.org/?x=1&y=2'},
        ])

    def test_round_trip_through_import(self):
        from django.core.files.uploadedfile import SimpleUploadedFile
        opml = self.client.get('/podcasts/feeds/export.opml').content
        carol = User.objects.create_user(username='carol', password='pw12345678')
        self.client.force_login(carol)
        r = self.client.post('/podcasts/feeds/import/',
                             {'file': SimpleUploadedFile('diora-podcasts.opml', opml, 'text/x-opml')})
        self.assertEqual(r.json(), {'ok': True, 'added': 2, 'skipped': 0})
        mine = lambda u: set(PodcastFeed.objects.filter(user=u).values_list('title', 'rss_url'))
        self.assertEqual(mine(carol), mine(self.user))
        # Importing the same file again adds nothing.
        r = self.client.post('/podcasts/feeds/import/',
                             {'file': SimpleUploadedFile('diora-podcasts.opml', opml, 'text/x-opml')})
        self.assertEqual(r.json(), {'ok': True, 'added': 0, 'skipped': 2})

    def test_no_feeds(self):
        import xml.etree.ElementTree as ET
        PodcastFeed.objects.filter(user=self.user).delete()
        root = ET.fromstring(self.client.get('/podcasts/feeds/export.opml').content)
        self.assertEqual(list(root.iter('outline')), [])

    def test_login_required(self):
        self.client.logout()
        self.assertEqual(self.client.get('/podcasts/feeds/export.opml').status_code, 401)


# ---------------------------------------------------------------------------
# ID3v2 chapters (CHAP frames in the audio file)
# ---------------------------------------------------------------------------

def _ss(n):
    """Synchsafe 4-byte integer."""
    return bytes([(n >> 21) & 0x7F, (n >> 14) & 0x7F, (n >> 7) & 0x7F, n & 0x7F])


def _frame(frame_id, data, v=3, fmt=0, plain_size=False):
    size = _ss(len(data)) if v == 4 and not plain_size else len(data).to_bytes(4, 'big')
    return frame_id.encode() + size + bytes([0, fmt]) + data


def _text(s, enc=3):
    codec = {0: 'latin-1', 1: 'utf-16', 3: 'utf-8'}[enc]
    return bytes([enc]) + s.encode(codec) + (b'\0\0' if enc == 1 else b'\0')


def _chap(element_id, start_ms, end_ms, subframes=b''):
    import struct
    return element_id + b'\0' + struct.pack('>IIII', start_ms, end_ms, 0xFFFFFFFF, 0xFFFFFFFF) + subframes


def _ctoc(element_id, children, top=True):
    return element_id + b'\0' + bytes([0x03 if top else 0x01, len(children)]) + b''.join(c + b'\0' for c in children)


def _unsync(data):
    """ID3 unsynchronisation: a $00 after every $FF followed by %111xxxxx or $00 (or at the end)."""
    out = bytearray()
    for i, b in enumerate(data):
        out.append(b)
        if b == 0xFF and (i + 1 == len(data) or data[i + 1] == 0 or data[i + 1] >= 0xE0):
            out.append(0)
    return bytes(out)


def _tag(body, v=3, flags=0, padding=64):
    body = body + b'\0' * padding
    return b'ID3' + bytes([v, 0, flags]) + _ss(len(body)) + body


_APIC = b'\0image/jpeg\0\x03\0' + b'\xff\xd8\xff\xe0' + b'p' * 300

# A v2.3 tag as podcast tools write it: title, cover, table of contents, chapters.
ID3V23 = _tag(
    _frame('TIT2', _text('Folge 1'))
    + _frame('APIC', _APIC * 10)
    + _frame('CTOC', _ctoc(b'toc', [b'ch1', b'ch2', b'ch3']))
    + _frame('CHAP', _chap(b'ch1', 0, 60000, _frame('TIT2', _text('Intro', 0))))
    + _frame('CHAP', _chap(b'ch2', 60000, 125500,
                           _frame('TIT2', _text('Zweiter Teil – ü', 1))
                           + _frame('WXXX', b'\x00Link\x00https://x.org/2')
                           + _frame('APIC', _APIC)))
    + _frame('CHAP', _chap(b'ch3', 125500, 200000))
)
ID3V23_CHAPTERS = [
    {'start': 0.0, 'title': 'Intro'},
    {'start': 60.0, 'title': 'Zweiter Teil – ü', 'url': 'https://x.org/2'},
    {'start': 125.5, 'title': ''},
]


class ID3ParserTests(TestCase):
    def chapters(self, data):
        from .chapters import _chapter, _finish
        from .id3 import chapters
        return _finish(_chapter(s / 1000, t, u) for s, _e, t, u in chapters(data))

    def test_v23(self):
        self.assertEqual(self.chapters(ID3V23), ID3V23_CHAPTERS)

    def test_v23_unsynchronised_with_extended_header(self):
        ext = (6).to_bytes(4, 'big') + b'\0\0' + b'\0\0\0\0'
        frames = (
            _frame('CHAP', _chap(b'a', 0xFFE0, 70000, _frame('TIT2', _text('Ünsynchron', 1))))
            + _frame('CHAP', _chap(b'b', 70000, 80000, _frame('TIT2', _text('Zwei')) + _frame('WOAF', b'https://x.org/w')))
        )
        body = _unsync(ext + frames + b'\0' * 16)
        self.assertNotEqual(body, ext + frames + b'\0' * 16)  # there really was something to unsynchronise
        tag = b'ID3' + bytes([3, 0, 0xC0]) + _ss(len(body)) + body
        self.assertEqual(self.chapters(tag), [
            {'start': 65.504, 'title': 'Ünsynchron'},
            {'start': 70.0, 'title': 'Zwei', 'url': 'https://x.org/w'},
        ])

    def test_v24_synchsafe_sizes_toc_and_frame_flags(self):
        # The cover makes the CHAP frame longer than 127 bytes, where synchsafe
        # and plain sizes differ.
        long_chap = _chap(b'c2', 30000, 60000, _frame('APIC', _APIC, v=4) + _frame('TIT2', _text('Mit Bild'), v=4))
        self.assertGreater(len(long_chap), 127)
        # Unsynchronised frame with a data length indicator (flags %00000011).
        raw = _chap(b'c3', 0x0001FFE0, 200000, _frame('TIT2', _text('ÿÿ Flags', 0), v=4))
        flagged = b'CHAP' + _ss(4 + len(_unsync(raw))) + bytes([0, 0x03]) + _ss(len(raw)) + _unsync(raw)
        tag = _tag(
            _frame('CTOC', _ctoc(b'top', [b'sub', b'c3']), v=4)
            + _frame('CTOC', _ctoc(b'sub', [b'c2', b'c1'], top=False), v=4)
            + _frame('CHAP', _chap(b'c1', 0, 30000, _frame('TIT2', _text('Eins'), v=4)), v=4)
            + _frame('CHAP', long_chap, v=4)
            + flagged
            + _frame('CHAP', _chap(b'extra', 0, 1000, _frame('TIT2', _text('Nicht im TOC'), v=4)), v=4),
            v=4,
        )
        from .id3 import chapters
        # Table-of-contents order (nested first), then what it doesn't list.
        self.assertEqual([c[2] for c in chapters(tag)], ['Mit Bild', 'Eins', 'ÿÿ Flags', 'Nicht im TOC'])
        self.assertEqual(self.chapters(tag), [
            {'start': 0.0, 'title': 'Eins'},
            {'start': 0.0, 'title': 'Nicht im TOC'},
            {'start': 30.0, 'title': 'Mit Bild'},
            {'start': 131.04, 'title': 'ÿÿ Flags'},
        ])

    def test_v24_with_plain_frame_sizes(self):
        # Some writers put v2.3-style sizes into v2.4 tags.
        long_chap = _chap(b'c1', 5000, 60000, _frame('APIC', _APIC, v=4, plain_size=True)
                          + _frame('TIT2', _text('Plain'), v=4, plain_size=True))
        tag = _tag(_frame('CHAP', long_chap, v=4, plain_size=True)
                   + _frame('CHAP', _chap(b'c2', 60000, 70000, _frame('TIT2', _text('Danach'), v=4)), v=4), v=4)
        self.assertEqual(self.chapters(tag), [{'start': 5.0, 'title': 'Plain'}, {'start': 60.0, 'title': 'Danach'}])

    def test_no_tag_or_no_chapters(self):
        from .id3 import chapters, tag_size
        self.assertEqual(chapters(b'\xff\xfb\x90\x00' * 100), [])
        self.assertEqual(chapters(_tag(_frame('TIT2', _text('Nur Titel')))), [])
        self.assertIsNone(tag_size(b'ID3\x03\x00\x00\x80\x00\x00\x00'))  # not synchsafe
        self.assertEqual(tag_size(_tag(b'', padding=300)), 310)


class _StreamResponse(_FakeResponse):
    """Hands out the body in the chunks asked for, counting what was taken."""

    def __init__(self, body=b'', status=200, headers=None):
        super().__init__(body, status, headers)
        self.sent = 0

    def iter_content(self, chunk_size=1):
        for i in range(0, len(self.body), chunk_size):
            chunk = self.body[i:i + chunk_size]
            self.sent += len(chunk)
            yield chunk


class ID3ChapterFetchTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')
        self.ep = PodcastEpisode.objects.create(feed=self.feed, guid='a', title='A',
                                                audio_url='https://example.org/a.mp3')
        self.calls = []
        self.responses = {}

    def fake_get(self, url, **kwargs):
        self.calls.append((url, kwargs.get('headers') or {}))
        r = self.responses[url]
        return r() if callable(r) else r

    def get(self):
        with patch('podcasts.chapters.assert_safe_url'), patch('podcasts.chapters.requests.get', self.fake_get):
            return self.client.get(f'/podcasts/episodes/{self.ep.id}/')

    def test_range_request_answered_with_206(self):
        from .chapters import ID3_MAX_BYTES
        self.responses['https://example.org/a.mp3'] = lambda: _StreamResponse(ID3V23 + b'\xff\xfb' * 100, status=206)
        self.assertEqual(self.get().json()['chapters'], ID3V23_CHAPTERS)
        self.assertEqual(self.calls[0][1]['Range'], f'bytes=0-{ID3_MAX_BYTES - 1}')
        # Cached: the second detail doesn't touch the file again.
        self.assertEqual(self.get().json()['chapters'], ID3V23_CHAPTERS)
        self.assertEqual(len(self.calls), 1)
        self.ep.refresh_from_db()
        self.assertEqual(self.ep.chapters, ID3V23_CHAPTERS)
        self.assertIsNotNone(self.ep.chapters_fetched_at)

    def test_server_ignoring_range_is_read_only_as_far_as_the_tag(self):
        from .chapters import ID3_CHUNK
        whole_file = _StreamResponse(ID3V23 + b'\xff\xfb' * (3 * 1024 * 1024), status=200)
        self.responses['https://example.org/a.mp3'] = whole_file
        self.assertEqual(self.get().json()['chapters'], ID3V23_CHAPTERS)
        self.assertLessEqual(whole_file.sent, ID3_CHUNK)

    def test_tag_larger_than_the_cap(self):
        from .chapters import ID3_CHUNK, ID3_MAX_BYTES
        tag = _tag(
            _frame('CHAP', _chap(b'ch1', 0, 1000, _frame('TIT2', _text('Vorne'))))
            + _frame('APIC', b'\0image/png\0\x03\0' + b'p' * (ID3_MAX_BYTES + 1024))
            + _frame('CHAP', _chap(b'ch2', 1000, 2000, _frame('TIT2', _text('Hinter der Grenze')))),
        )
        response = _StreamResponse(tag + b'\xff\xfb' * 1024, status=206)
        self.responses['https://example.org/a.mp3'] = response
        self.assertEqual(self.get().json()['chapters'], [{'start': 0.0, 'title': 'Vorne'}])
        self.assertLessEqual(response.sent, ID3_MAX_BYTES + ID3_CHUNK)

    def test_file_without_tag_is_remembered(self):
        self.responses['https://example.org/a.mp3'] = lambda: _StreamResponse(b'\0\0\0\x20ftypM4A ' + b'x' * 5000)
        self.assertEqual(self.get().json()['chapters'], [])
        self.assertEqual(self.get().json()['chapters'], [])
        self.assertEqual(len(self.calls), 1)
        self.ep.refresh_from_db()
        self.assertIsNotNone(self.ep.chapters_fetched_at)

    def test_empty_json_chapters_fall_back_to_the_file(self):
        self.ep.chapters_url = 'https://x.org/c.json'
        self.ep.save()
        self.responses['https://x.org/c.json'] = _FakeResponse(b'{"chapters": []}')
        self.responses['https://example.org/a.mp3'] = _StreamResponse(ID3V23, status=206)
        self.assertEqual(self.get().json()['chapters'], ID3V23_CHAPTERS)
        self.assertEqual([c[0] for c in self.calls], ['https://x.org/c.json', 'https://example.org/a.mp3'])

    def test_json_chapters_win(self):
        self.ep.chapters_url = 'https://x.org/c.json'
        self.ep.save()
        self.responses['https://x.org/c.json'] = _FakeResponse(json.dumps(CHAPTERS_JSON).encode())
        self.assertEqual(len(self.get().json()['chapters']), 3)
        self.assertEqual([c[0] for c in self.calls], ['https://x.org/c.json'])

    def test_redirect_is_followed_and_rechecked(self):
        self.responses['https://example.org/a.mp3'] = _FakeResponse(
            status=302, headers={'Location': 'https://cdn.example.org/a.mp3'})
        self.responses['https://cdn.example.org/a.mp3'] = _StreamResponse(ID3V23, status=206)
        with patch('podcasts.chapters.assert_safe_url') as check, patch('podcasts.chapters.requests.get', self.fake_get):
            r = self.client.get(f'/podcasts/episodes/{self.ep.id}/')
        self.assertEqual(r.json()['chapters'], ID3V23_CHAPTERS)
        self.assertEqual([c.args[0] for c in check.call_args_list],
                         ['https://example.org/a.mp3', 'https://cdn.example.org/a.mp3'])
        self.assertEqual(self.calls[1][1]['Range'], self.calls[0][1]['Range'])

    def test_temporary_failure_is_not_cached(self):
        self.responses['https://example.org/a.mp3'] = _FakeResponse(status=503)
        self.assertEqual(self.get().json()['chapters'], [])
        self.ep.refresh_from_db()
        self.assertIsNone(self.ep.chapters_fetched_at)
        self.responses['https://example.org/a.mp3'] = _StreamResponse(ID3V23, status=206)
        self.assertEqual(self.get().json()['chapters'], ID3V23_CHAPTERS)

    def test_inline_chapters_need_no_fetch(self):
        self.ep.chapters = [{'start': 0.0, 'title': 'Inline'}]
        self.ep.save()
        self.assertEqual(self.get().json()['chapters'], [{'start': 0.0, 'title': 'Inline'}])
        self.assertEqual(self.calls, [])


class ChapterCacheRefreshTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')

    def refresh(self, rss):
        with patch('podcasts.views._fetch_feed', lambda url: _parse(rss)):
            _refresh_feed(self.feed)

    def test_chapters_from_the_file_survive_a_refresh(self):
        self.refresh(_rich_rss([('a', '')]))
        fetched = datetime(2026, 1, 2, tzinfo=timezone.utc)
        PodcastEpisode.objects.update(chapters=[{'start': 0.0, 'title': 'ID3'}], chapters_fetched_at=fetched)
        self.refresh(_rich_rss([('a', '')]))
        ep = PodcastEpisode.objects.get()
        self.assertEqual((ep.chapters, ep.chapters_fetched_at), ([{'start': 0.0, 'title': 'ID3'}], fetched))
        # A chapters URL turning up means fetching that.
        self.refresh(_rich_rss([('a', '<podcast:chapters url="https://x.org/c.json" type="application/json+chapters"/>')]))
        ep.refresh_from_db()
        self.assertEqual((ep.chapters, ep.chapters_fetched_at), ([], None))

    def test_inline_chapters_going_away_means_a_fetch(self):
        self.refresh(_rich_rss([('a', PSC)]))
        self.assertEqual(len(PodcastEpisode.objects.get().chapters), 4)
        self.refresh(_rich_rss([('a', '')]))
        ep = PodcastEpisode.objects.get()
        self.assertEqual((ep.chapters, ep.chapters_fetched_at), ([], None))


# ---------------------------------------------------------------------------
# Transcripts
# ---------------------------------------------------------------------------

VTT = (
    'WEBVTT\r\nKind: captions\r\n\r\n'
    'NOTE Ein Kommentar\r\nüber zwei Zeilen\r\n\r\n'
    'STYLE\r\n::cue { color: red }\r\n\r\n'
    '1\r\n00:00.000 --> 00:02.000\r\n<v Anna>Hallo und</v>\r\n\r\n'
    'intro-2\r\n00:02.000 --> 00:04.500 align:start position:10%\r\n<v Anna>willkommen &amp; so.</v>\r\n\r\n'
    '00:00:04.500 --> 00:00:06.000\r\n<v.loud Ben>Danke!\r\n<v Anna>Gern.\r\n\r\n'
    '01:00:00.000 --> 01:00:02.000\r\n<i>Ende</i> <00:00:01.000><c>gut</c>\r\n'
)

SRT = (
    '1\n00:00:01,000 --> 00:00:03,500\nErste Zeile\nzweite Zeile\n\n'
    '2\n00:00:03,500 --> 00:00:05,000\n<i>weiter.</i>\n\n'
    '3\n00:00:40,000 --> 00:00:42,000\nNach der Pause\n'
    '4\n00:00:42,000 --> 00:00:43,000\nohne Leerzeile davor\n'
)

TRANSCRIPT_JSON = {
    'version': '1.0.0',
    'segments': [
        {'speaker': 'Anna', 'startTime': 0, 'endTime': 0.5, 'body': 'Hallo'},
        {'speaker': 'Anna', 'startTime': 0.5, 'endTime': 1.2, 'body': 'zusammen.'},
        {'speaker': 'Ben', 'startTime': 1.3, 'endTime': 2, 'body': 'Hi'},
        {'speaker': '', 'startTime': 2.5, 'body': 'ohne Ende'},
        {'startTime': 3, 'endTime': 4, 'body': 'und &amp; weiter'},
        {'startTime': 'kaputt', 'body': 'weg'},
        'kein Objekt',
    ],
}


class TranscriptParsingTests(TestCase):
    def test_vtt(self):
        from .transcripts import merge, parse
        self.assertEqual(merge(parse(VTT.encode(), 'vtt')), [
            {'start': 0.0, 'end': 4.5, 'speaker': 'Anna', 'text': 'Hallo und willkommen & so.'},
            {'start': 4.5, 'end': 6.0, 'speaker': 'Ben', 'text': 'Danke!'},
            {'start': 4.5, 'end': 6.0, 'speaker': 'Anna', 'text': 'Gern.'},
            {'start': 3600.0, 'end': 3602.0, 'speaker': None, 'text': 'Ende gut'},
        ])

    def test_srt(self):
        from .transcripts import merge, parse
        self.assertEqual(merge(parse(SRT.encode('cp1252'), 'srt')), [
            {'start': 1.0, 'end': 5.0, 'speaker': None, 'text': 'Erste Zeile zweite Zeile weiter.'},
            {'start': 40.0, 'end': 43.0, 'speaker': None, 'text': 'Nach der Pause ohne Leerzeile davor'},
        ])

    def test_json(self):
        from .transcripts import merge, parse
        self.assertEqual(merge(parse(json.dumps(TRANSCRIPT_JSON).encode(), 'json')), [
            {'start': 0.0, 'end': 1.2, 'speaker': 'Anna', 'text': 'Hallo zusammen.'},
            {'start': 1.3, 'end': 2.0, 'speaker': 'Ben', 'text': 'Hi'},
            {'start': 2.5, 'end': 4.0, 'speaker': None, 'text': 'ohne Ende und & weiter'},
        ])

    def test_merging(self):
        from .transcripts import merge
        # One-second fragments without a sentence end: cut at 30 s.
        words = [(float(i), i + 1.0, 'A', f'w{i}') for i in range(40)]
        self.assertEqual([(s['start'], s['end']) for s in merge(words)], [(0.0, 30.0), (30.0, 40.0)])
        # A sentence end closes a segment once it's 5 s long, not before.
        frags = [(0.0, 1.0, None, 'Ja.'), (1.0, 6.0, None, 'Genau, so ist es.'), (6.0, 7.0, None, 'Weiter')]
        self.assertEqual([s['text'] for s in merge(frags)], ['Ja. Genau, so ist es.', 'Weiter'])

    def test_html_is_unsupported(self):
        from .transcripts import Unsupported, parse
        with self.assertRaises(Unsupported):
            parse(b'<!DOCTYPE html><html><body><p>Hallo</p></body></html>', 'vtt')

    def test_choice(self):
        from .transcripts import candidates
        ts = [
            {'url': 'https://x.org/a.srt', 'type': 'application/x-subrip', 'language': 'de'},
            {'url': 'https://x.org/a.html', 'type': 'text/html', 'language': 'de'},
            {'url': 'https://x.org/en.json', 'type': 'application/json', 'language': 'en'},
            {'url': 'https://x.org/a.vtt', 'type': 'text/vtt', 'language': 'de-DE'},
            {'url': 'https://x.org/fr.json', 'type': 'application/json', 'language': 'fr'},
            {'url': 'https://x.org/b.vtt', 'type': '', 'language': ''},
        ]
        self.assertEqual([t['url'] for t in candidates(ts)], [
            'https://x.org/a.vtt', 'https://x.org/b.vtt', 'https://x.org/a.srt',
            'https://x.org/en.json', 'https://x.org/fr.json',
        ])


class TranscriptEndpointTests(TestCase):
    VTT_T = {'url': 'https://example.org/a.vtt', 'type': 'text/vtt', 'language': 'de'}
    JSON_T = {'url': 'https://example.org/a.json', 'type': 'application/json', 'language': 'de'}
    HTML_T = {'url': 'https://example.org/a.html', 'type': 'text/html', 'language': 'de'}

    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.client.force_login(self.user)
        self.feed = PodcastFeed.objects.create(user=self.user, rss_url='https://example.org/feed', title='Feed')
        self.ep = PodcastEpisode.objects.create(
            feed=self.feed, guid='a', title='A', audio_url='https://example.org/a.mp3',
            chapters=[{'start': 0.0, 'title': 'Inline'}],  # no chapter fetch in these tests
            transcripts=[self.VTT_T, self.JSON_T, self.HTML_T],
        )
        self.requests = []
        self.responses = {
            self.VTT_T['url']: lambda: _FakeResponse(VTT.encode()),
            self.JSON_T['url']: lambda: _FakeResponse(json.dumps(TRANSCRIPT_JSON).encode()),
        }

    def fake_get(self, url, **kwargs):
        self.requests.append(url)
        return self.responses[url]()

    def get(self, ep=None, what='transcript/'):
        with patch('podcasts.chapters.assert_safe_url'), patch('podcasts.chapters.requests.get', self.fake_get):
            return self.client.get(f'/podcasts/episodes/{(ep or self.ep).id}/{what}')

    def test_best_transcript_is_fetched_once(self):
        r = self.get()
        self.assertEqual(r.status_code, 200)
        data = r.json()
        self.assertEqual(data['source'], self.JSON_T)
        self.assertEqual(data['segments'][0], {'start': 0.0, 'end': 1.2, 'speaker': 'Anna', 'text': 'Hallo zusammen.'})
        self.assertEqual(self.get().json(), data)
        self.assertEqual(self.requests, [self.JSON_T['url']])
        self.assertTrue(self.get(what='').json()['has_transcript'])

    def test_falls_back_to_the_next_one(self):
        self.responses[self.JSON_T['url']] = lambda: _FakeResponse(status=404)
        data = self.get().json()
        self.assertEqual(data['source'], self.VTT_T)
        self.assertEqual(data['segments'][1]['speaker'], 'Ben')
        self.get()
        self.assertEqual(self.requests, [self.JSON_T['url'], self.VTT_T['url']])

    def test_temporary_failure_is_not_cached(self):
        self.responses[self.JSON_T['url']] = lambda: _FakeResponse(status=503)
        self.responses[self.VTT_T['url']] = lambda: _FakeResponse(status=503)
        r = self.get()
        self.assertEqual((r.status_code, r.json()), (502, {'error': 'unavailable'}))
        # The better one failing for now: the other one is shown, but not kept.
        self.responses[self.VTT_T['url']] = lambda: _FakeResponse(VTT.encode())
        self.assertEqual(self.get().json()['source'], self.VTT_T)
        self.responses[self.JSON_T['url']] = lambda: _FakeResponse(json.dumps(TRANSCRIPT_JSON).encode())
        self.assertEqual(self.get().json()['source'], self.JSON_T)
        self.get()
        self.assertEqual(self.requests.count(self.JSON_T['url']), 3)

    def test_html_only_is_unsupported(self):
        self.ep.transcripts = [self.HTML_T]
        self.ep.save()
        r = self.get()
        self.assertEqual((r.status_code, r.json()), (404, {'error': 'unsupported'}))
        self.assertEqual(self.requests, [])
        self.assertFalse(self.get(what='').json()['has_transcript'])

    def test_html_served_under_another_type(self):
        self.ep.transcripts = [self.VTT_T]
        self.ep.save()
        self.responses[self.VTT_T['url']] = lambda: _FakeResponse(b'<html><body>Hallo</body></html>')
        self.assertTrue(self.get(what='').json()['has_transcript'])
        r = self.get()
        self.assertEqual((r.status_code, r.json()), (404, {'error': 'unsupported'}))
        self.assertEqual(self.get().status_code, 404)
        self.assertEqual(self.requests, [self.VTT_T['url']])
        self.assertFalse(self.get(what='').json()['has_transcript'])

    def test_no_transcript(self):
        self.ep.transcripts = []
        self.ep.save()
        r = self.get()
        self.assertEqual((r.status_code, r.json()), (404, {'error': 'no transcript'}))
        self.assertFalse(self.get(what='').json()['has_transcript'])

    def test_new_transcripts_in_the_feed_replace_the_cache(self):
        self.ep.transcripts = [self.VTT_T]
        self.ep.save()
        self.assertEqual(self.get().json()['source'], self.VTT_T)
        self.ep.transcripts = [self.VTT_T, self.JSON_T]
        self.ep.save()
        self.assertEqual(self.get().json()['source'], self.JSON_T)
        self.assertEqual(self.requests, [self.VTT_T['url'], self.JSON_T['url']])

    def test_other_users_episode_is_not_found(self):
        bob = User.objects.create_user(username='bob', password='pw12345678')
        feed = PodcastFeed.objects.create(user=bob, rss_url='https://example.org/b', title='B')
        ep = PodcastEpisode.objects.create(feed=feed, guid='x', title='X', audio_url='https://example.org/x.mp3',
                                           transcripts=[self.VTT_T])
        r = self.get(ep)
        self.assertEqual((r.status_code, r.json()), (404, {'error': 'not found'}))
        self.assertEqual(self.requests, [])

    def test_login_required(self):
        self.client.logout()
        self.assertEqual(self.get().status_code, 401)