import itertools
import re
import urllib.parse

from .common import InfoExtractor
from ..utils import (
    int_or_none,
    mimetype2ext,
    remove_end,
    strip_or_none,
    unified_strdate,
    url_or_none,
    urljoin,
)


class IwaraBaseIE(InfoExtractor):
    _BASE_REGEX = r'(?P<base_url>https?://(?:www\.|ecchi\.)?iwara\.tv)'

    def _extract_playlist(self, base_url, webpage):
        for path in re.findall(r'class="title">\s*<a[^<]+href="([^"]+)', webpage):
            yield self.url_result(urljoin(base_url, path))


class IwaraIE(IwaraBaseIE):
    _VALID_URL = fr'{IwaraBaseIE._BASE_REGEX}/videos/(?P<id>[a-zA-Z0-9]+)'
    _TESTS = [{
        'url': 'http://iwara.tv/videos/amVwUl1EHpAD9RD',
        # md5 is unstable
        'info_dict': {
            'id': 'amVwUl1EHpAD9RD',
            'ext': 'mp4',
            'title': '【MMD R-18】ガールフレンド carry_me_off',
            'age_limit': 18,
            'thumbnail': 'https://i.iwara.tv/sites/default/files/videos/thumbnails/7951/thumbnail-7951_0001.png',
            'uploader': 'Reimu丨Action',
            'upload_date': '20150828',
            'description': 'md5:1d4905ce48c66c9299c617f08e106e0f',
        },
    }, {
        'url': 'http://ecchi.iwara.tv/videos/Vb4yf2yZspkzkBO',
        'md5': '7e5f1f359cd51a027ba4a7b7710a50f0',
        'info_dict': {
            'id': '0B1LvuHnL-sRFNXB1WHNqbGw4SXc',
            'ext': 'mp4',
            'title': '[3D Hentai] Kyonyu × Genkai × Emaki Shinobi Girls.mp4',
            'age_limit': 18,
        },
        'add_ie': ['GoogleDrive'],
    }, {
        'url': 'http://www.iwara.tv/videos/nawkaumd6ilezzgq',
        # md5 is unstable
        'info_dict': {
            'id': '6liAP9s2Ojc',
            'ext': 'mp4',
            'age_limit': 18,
            'title': '[MMD] Do It Again Ver.2 [1080p 60FPS] (Motion,Camera,Wav+DL)',
            'description': 'md5:590c12c0df1443d833fbebe05da8c47a',
            'upload_date': '20160910',
            'uploader': 'aMMDsork',
            'uploader_id': 'UCVOFyOSCyFkXTYYHITtqB7A',
        },
        'add_ie': ['Youtube'],
    }]

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

        webpage, urlh = self._download_webpage_handle(url, video_id)

        hostname = urllib.parse.urlparse(urlh.geturl()).hostname
        # ecchi is 'sexy' in Japanese
        age_limit = 18 if hostname.split('.')[0] == 'ecchi' else 0

        video_data = self._download_json('http://www.iwara.tv/api/video/%s' % video_id, video_id)

        if not video_data:
            iframe_url = self._html_search_regex(
                r'<iframe[^>]+src=([\'"])(?P<url>[^\'"]+)\1',
                webpage, 'iframe URL', group='url')
            return {
                '_type': 'url_transparent',
                'url': iframe_url,
                'age_limit': age_limit,
            }

        title = remove_end(self._html_extract_title(webpage), ' | Iwara')

        thumbnail = self._html_search_regex(
            r'poster=[\'"]([^\'"]+)', webpage, 'thumbnail', default=None)

        uploader = self._html_search_regex(
            r'class="username">([^<]+)', webpage, 'uploader', fatal=False)

        upload_date = unified_strdate(self._html_search_regex(
            r'作成日:([^\s]+)', webpage, 'upload_date', fatal=False))

        description = strip_or_none(self._search_regex(
            r'<p>(.+?(?=</div))', webpage, 'description', fatal=False,
            flags=re.DOTALL))

        formats = []
        for a_format in video_data:
            format_uri = url_or_none(a_format.get('uri'))
            if not format_uri:
                continue
            format_id = a_format.get('resolution')
            height = int_or_none(self._search_regex(
                r'(\d+)p', format_id, 'height', default=None))
            formats.append({
                'url': self._proto_relative_url(format_uri, 'https:'),
                'format_id': format_id,
                'ext': mimetype2ext(a_format.get('mime')) or 'mp4',
                'height': height,
                'width': int_or_none(height / 9.0 * 16.0 if height else None),
                'quality': 1 if format_id == 'Source' else 0,
            })

        self._sort_formats(formats)

        return {
            'id': video_id,
            'title': title,
            'age_limit': age_limit,
            'formats': formats,
            'thumbnail': self._proto_relative_url(thumbnail, 'https:'),
            'uploader': uploader,
            'upload_date': upload_date,
            'description': description,
        }


class IwaraPlaylistIE(IwaraBaseIE):
    _VALID_URL = fr'{IwaraBaseIE._BASE_REGEX}/playlist/(?P<id>[^/?#&]+)'
    IE_NAME = 'iwara:playlist'

    _TESTS = [{
        'url': 'https://ecchi.iwara.tv/playlist/best-enf',
        'info_dict': {
            'title': 'Best enf',
            'uploader': 'Jared98112',
            'id': 'best-enf',
        },
        'playlist_mincount': 1097,
    }, {
        # urlencoded
        'url': 'https://ecchi.iwara.tv/playlist/%E3%83%97%E3%83%AC%E3%82%A4%E3%83%AA%E3%82%B9%E3%83%88-2',
        'info_dict': {
            'id': 'プレイリスト-2',
            'title': 'プレイリスト',
            'uploader': 'mainyu',
        },
        'playlist_mincount': 91,
    }]

    def _real_extract(self, url):
        playlist_id, base_url = self._match_valid_url(url).group('id', 'base_url')
        playlist_id = urllib.parse.unquote(playlist_id)
        webpage = self._download_webpage(url, playlist_id)

        return {
            '_type': 'playlist',
            'id': playlist_id,
            'title': self._html_search_regex(r'class="title"[^>]*>([^<]+)', webpage, 'title', fatal=False),
            'uploader': self._html_search_regex(r'<h2>([^<]+)', webpage, 'uploader', fatal=False),
            'entries': self._extract_playlist(base_url, webpage),
        }


class IwaraUserIE(IwaraBaseIE):
    _VALID_URL = fr'{IwaraBaseIE._BASE_REGEX}/users/(?P<id>[^/?#&]+)'
    IE_NAME = 'iwara:user'

    _TESTS = [{
        'note': 'number of all videos page is just 1 page. less than 40 videos',
        'url': 'https://ecchi.iwara.tv/users/infinityyukarip',
        'info_dict': {
            'title': 'Uploaded videos from Infinity_YukariP',
            'id': 'infinityyukarip',
            'uploader': 'Infinity_YukariP',
            'uploader_id': 'infinityyukarip',
        },
        'playlist_mincount': 39,
    }, {
        'note': 'no even all videos page. probably less than 10 videos',
        'url': 'https://ecchi.iwara.tv/users/mmd-quintet',
        'info_dict': {
            'title': 'Uploaded videos from mmd quintet',
            'id': 'mmd-quintet',
            'uploader': 'mmd quintet',
            'uploader_id': 'mmd-quintet',
        },
        'playlist_mincount': 6,
    }, {
        'note': 'has paging. more than 40 videos',
        'url': 'https://ecchi.iwara.tv/users/theblackbirdcalls',
        'info_dict': {
            'title': 'Uploaded videos from TheBlackbirdCalls',
            'id': 'theblackbirdcalls',
            'uploader': 'TheBlackbirdCalls',
            'uploader_id': 'theblackbirdcalls',
        },
        'playlist_mincount': 420,
    }, {
        'note': 'foreign chars in URL. there must be foreign characters in URL',
        'url': 'https://ecchi.iwara.tv/users/ぶた丼',
        'info_dict': {
            'title': 'Uploaded videos from ぶた丼',
            'id': 'ぶた丼',
            'uploader': 'ぶた丼',
            'uploader_id': 'ぶた丼',
        },
        'playlist_mincount': 170,
    }]

    def _entries(self, playlist_id, base_url):
        webpage = self._download_webpage(
            f'{base_url}/users/{playlist_id}', playlist_id)
        videos_url = self._search_regex(r'<a href="(/users/[^/]+/videos)(?:\?[^"]+)?">', webpage, 'all videos url', default=None)
        if not videos_url:
            yield from self._extract_playlist(base_url, webpage)
            return

        videos_url = urljoin(base_url, videos_url)

        for n in itertools.count(1):
            page = self._download_webpage(
                videos_url, playlist_id, note=f'Downloading playlist page {n}',
                query={'page': str(n - 1)} if n > 1 else {})
            yield from self._extract_playlist(
                base_url, page)

            if f'page={n}' not in page:
                break

    def _real_extract(self, url):
        playlist_id, base_url = self._match_valid_url(url).group('id', 'base_url')
        playlist_id = urllib.parse.unquote(playlist_id)

        return self.playlist_result(
            self._entries(playlist_id, base_url), playlist_id)