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import itertools

from .common import InfoExtractor
from ..utils import (
    clean_html,
    extract_attributes,
    get_element_by_class,
    get_element_html_by_class,
    get_elements_html_by_class,
    parse_qs,
    traverse_obj,
    unified_strdate,
    urljoin,
)


class TheGuardianPodcastIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?theguardian\.com/\w+/audio/\d{4}/\w{3}/\d{1,2}/(?P<id>[\w-]+)'
    _TESTS = [{
        'url': 'https://www.theguardian.com/news/audio/2023/nov/03/we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
            'ext': 'mp3',
            'title': '‘We are just getting started’: the plastic-eating bacteria that could change the world – podcast',
            'description': 'md5:cfd3df2791d394d2ab62cd571d5207ee',
            'creator': 'Stephen Buranyi',
            'thumbnail': 'md5:73c12558fcb3b0e2a59422bfb33b3f79',
            'release_date': '20231103',
        },
    }, {
        'url': 'https://www.theguardian.com/news/audio/2023/oct/30/the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
            'ext': 'mp3',
            'title': 'The trials of Robert Habeck: is the world’s most powerful green politician doomed to fail? – podcast',
            'description': 'md5:1b5cf6582d1771c6b7077784b5456994',
            'creator': 'Philip Oltermann',
            'thumbnail': 'md5:6e5c5ec43843e956e20be793722e9080',
            'release_date': '20231030',
        },
    }, {
        'url': 'https://www.theguardian.com/football/audio/2023/nov/06/arsenal-feel-hard-done-by-and-luton-hold-liverpool-football-weekly',
        'md5': 'a2fcff6f8e060a95b1483295273dc35e',
        'info_dict': {
            'id': 'arsenal-feel-hard-done-by-and-luton-hold-liverpool-football-weekly',
            'ext': 'mp3',
            'title': 'Arsenal feel hard done by and Luton hold Liverpool – Football Weekly',
            'description': 'md5:286a9fbddaeb7c83cc65d1c4a5330b2a',
            'creator': 'Max Rushden',
            'thumbnail': 'md5:93eb7d6440f1bb94eb3a6cad63f48afd',
            'release_date': '20231106',
        },
    }, {
        'url': 'https://www.theguardian.com/politics/audio/2023/nov/02/the-covid-inquiry-politics-weekly-uk-podcast',
        'md5': '06a0f7e9701a80c8064a5d35690481ec',
        'info_dict': {
            'id': 'the-covid-inquiry-politics-weekly-uk-podcast',
            'ext': 'mp3',
            'title': 'The Covid inquiry | Politics Weekly UK - podcast',
            'description': 'md5:207c98859c14903582b17d25b014046e',
            'creator': 'Gaby Hinsliff',
            'thumbnail': 'md5:28932a7b5a25b057be330d2ed70ea7f3',
            'release_date': '20231102',
        },
    }]

    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage = self._download_webpage(url, video_id)
        return {
            'id': video_id,
            'title': self._og_search_title(webpage) or get_element_by_class('content__headline', webpage),
            'description': self._og_search_description(webpage),
            'creator': self._html_search_meta('author', webpage),
            'thumbnail': self._og_search_thumbnail(webpage),
            'release_date': unified_strdate(self._html_search_meta('article:published_time', webpage)),
            'url': extract_attributes(get_element_html_by_class(
                'podcast__player', webpage) or '').get('data-source'),
        }


class TheGuardianPodcastPlaylistIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?theguardian\.com/\w+/series/(?P<id>[\w-]+)(?:\?page=\d+)?'
    _TESTS = [{
        'url': 'https://www.theguardian.com/football/series/theguardianswomensfootballweekly',
        'info_dict': {
            'id': 'theguardianswomensfootballweekly',
            'title': "The Guardian's Women's Football Weekly",
            'description': 'md5:e2cc021311e582d29935a73614a43f51',
        },
        'playlist_mincount': 69,
    }, {
        'url': 'https://www.theguardian.com/news/series/todayinfocus?page=2',
        'info_dict': {
            'id': 'todayinfocus',
            'title': 'Today in Focus',
            'description': 'md5:0f097764fc0d359e0b6eb537be0387e2',
        },
        'playlist_mincount': 1261,
    }, {
        'url': 'https://www.theguardian.com/news/series/the-audio-long-read',
        'info_dict': {
            'id': 'the-audio-long-read',
            'title': 'The Audio Long Read',
            'description': 'md5:5462994a27527309562b25b6defc4ef3',
        },
        'playlist_mincount': 996,
    }]

    def _entries(self, url, playlist_id):
        for page in itertools.count(1):
            webpage, urlh = self._download_webpage_handle(
                url, playlist_id, f'Downloading page {page}', query={'page': page})
            if 'page' not in parse_qs(urlh.url):
                break

            episodes = get_elements_html_by_class('fc-item--type-media', webpage)
            yield from traverse_obj(episodes, (..., {extract_attributes}, 'data-id'))

    def _real_extract(self, url):
        podcast_id = self._match_id(url)

        webpage = self._download_webpage(url, podcast_id)

        title = clean_html(get_element_by_class(
            'index-page-header__title', webpage) or get_element_by_class('flagship-audio__title', webpage))
        description = self._og_search_description(webpage) or self._html_search_meta(
            'description', webpage)

        return self.playlist_from_matches(
            self._entries(url, podcast_id), podcast_id, title, description=description,
            ie=TheGuardianPodcastIE, getter=lambda x: urljoin('https://www.theguardian.com', x))