import time
import hashlib
import re

from .common import InfoExtractor
from ..utils import (
    ExtractorError,
    unescapeHTML,
    unified_strdate,
    urljoin,
)


class DouyuTVIE(InfoExtractor):
    IE_DESC = '斗鱼'
    _VALID_URL = r'https?://(?:www\.)?douyu(?:tv)?\.com/(?:[^/]+/)*(?P<id>[A-Za-z0-9]+)'
    _TESTS = [{
        'url': 'http://www.douyutv.com/iseven',
        'info_dict': {
            'id': '17732',
            'display_id': 'iseven',
            'ext': 'flv',
            'title': 're:^清晨醒脑！根本停不下来！ [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}$',
            'description': r're:.*m7show@163\.com.*',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': '7师傅',
            'is_live': True,
        },
        'params': {
            'skip_download': True,
        },
    }, {
        'url': 'http://www.douyutv.com/85982',
        'info_dict': {
            'id': '85982',
            'display_id': '85982',
            'ext': 'flv',
            'title': 're:^小漠从零单排记！——CSOL2躲猫猫 [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}$',
            'description': 'md5:746a2f7a253966a06755a912f0acc0d2',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'douyu小漠',
            'is_live': True,
        },
        'params': {
            'skip_download': True,
        },
        'skip': 'Room not found',
    }, {
        'url': 'http://www.douyutv.com/17732',
        'info_dict': {
            'id': '17732',
            'display_id': '17732',
            'ext': 'flv',
            'title': 're:^清晨醒脑！根本停不下来！ [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}$',
            'description': r're:.*m7show@163\.com.*',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': '7师傅',
            'is_live': True,
        },
        'params': {
            'skip_download': True,
        },
    }, {
        'url': 'http://www.douyu.com/xiaocang',
        'only_matching': True,
    }, {
        # \"room_id\"
        'url': 'http://www.douyu.com/t/lpl',
        'only_matching': True,
    }]

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

        if video_id.isdigit():
            room_id = video_id
        else:
            page = self._download_webpage(url, video_id)
            room_id = self._html_search_regex(
                r'"room_id\\?"\s*:\s*(\d+),', page, 'room id')

        # Grab metadata from mobile API
        room = self._download_json(
            'http://m.douyu.com/html5/live?roomId=%s' % room_id, video_id,
            note='Downloading room info')['data']

        # 1 = live, 2 = offline
        if room.get('show_status') == '2':
            raise ExtractorError('Live stream is offline', expected=True)

        # Grab the URL from PC client API
        # The m3u8 url from mobile API requires re-authentication every 5 minutes
        tt = int(time.time())
        signContent = 'lapi/live/thirdPart/getPlay/%s?aid=pcclient&rate=0&time=%d9TUk5fjjUjg9qIMH3sdnh' % (room_id, tt)
        sign = hashlib.md5(signContent.encode('ascii')).hexdigest()
        video_url = self._download_json(
            'http://coapi.douyucdn.cn/lapi/live/thirdPart/getPlay/' + room_id,
            video_id, note='Downloading video URL info',
            query={'rate': 0}, headers={
                'auth': sign,
                'time': str(tt),
                'aid': 'pcclient'
            })['data']['live_url']

        title = unescapeHTML(room['room_name'])
        description = room.get('show_details')
        thumbnail = room.get('room_src')
        uploader = room.get('nickname')

        return {
            'id': room_id,
            'display_id': video_id,
            'url': video_url,
            'title': title,
            'description': description,
            'thumbnail': thumbnail,
            'uploader': uploader,
            'is_live': True,
        }


class DouyuShowIE(InfoExtractor):
    _VALID_URL = r'https?://v(?:mobile)?\.douyu\.com/show/(?P<id>[0-9a-zA-Z]+)'

    _TESTS = [{
        'url': 'https://v.douyu.com/show/rjNBdvnVXNzvE2yw',
        'md5': '0c2cfd068ee2afe657801269b2d86214',
        'info_dict': {
            'id': 'rjNBdvnVXNzvE2yw',
            'ext': 'mp4',
            'title': '陈一发儿：砒霜 我有个室友系列！04-01 22点场',
            'duration': 7150.08,
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': '陈一发儿',
            'uploader_id': 'XrZwYelr5wbK',
            'uploader_url': 'https://v.douyu.com/author/XrZwYelr5wbK',
            'upload_date': '20170402',
        },
    }, {
        'url': 'https://vmobile.douyu.com/show/rjNBdvnVXNzvE2yw',
        'only_matching': True,
    }]

    def _real_extract(self, url):
        url = url.replace('vmobile.', 'v.')
        video_id = self._match_id(url)

        webpage = self._download_webpage(url, video_id)

        room_info = self._parse_json(self._search_regex(
            r'var\s+\$ROOM\s*=\s*({.+});', webpage, 'room info'), video_id)

        video_info = None

        for trial in range(5):
            # Sometimes Douyu rejects our request. Let's try it more times
            try:
                video_info = self._download_json(
                    'https://vmobile.douyu.com/video/getInfo', video_id,
                    query={'vid': video_id},
                    headers={
                        'Referer': url,
                        'x-requested-with': 'XMLHttpRequest',
                    })
                break
            except ExtractorError:
                self._sleep(1, video_id)

        if not video_info:
            raise ExtractorError('Can\'t fetch video info')

        formats = self._extract_m3u8_formats(
            video_info['data']['video_url'], video_id,
            entry_protocol='m3u8_native', ext='mp4')

        upload_date = unified_strdate(self._html_search_regex(
            r'<em>上传时间：</em><span>([^<]+)</span>', webpage,
            'upload date', fatal=False))

        uploader = uploader_id = uploader_url = None
        mobj = re.search(
            r'(?m)<a[^>]+href="/author/([0-9a-zA-Z]+)".+?<strong[^>]+title="([^"]+)"',
            webpage)
        if mobj:
            uploader_id, uploader = mobj.groups()
            uploader_url = urljoin(url, '/author/' + uploader_id)

        return {
            'id': video_id,
            'title': room_info['name'],
            'formats': formats,
            'duration': room_info.get('duration'),
            'thumbnail': room_info.get('pic'),
            'upload_date': upload_date,
            'uploader': uploader,
            'uploader_id': uploader_id,
            'uploader_url': uploader_url,
        }