from .common import InfoExtractor
from ..utils import (
    int_or_none,
    urljoin,
)


class MelonVODIE(InfoExtractor):
    _VALID_URL = r'https?://vod\.melon\.com/video/detail2\.html?\?.*?mvId=(?P<id>[0-9]+)'
    _TEST = {
        'url': 'http://vod.melon.com/video/detail2.htm?mvId=50158734',
        'info_dict': {
            'id': '50158734',
            'ext': 'mp4',
            'title': "Jessica 'Wonderland' MV Making Film",
            'thumbnail': r're:^https?://.*\.jpg$',
            'artist': 'Jessica (제시카)',
            'upload_date': '20161212',
            'duration': 203,
        },
        'params': {
            'skip_download': 'm3u8 download',
        },
    }

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

        play_info = self._download_json(
            'http://vod.melon.com/video/playerInfo.json', video_id,
            note='Downloading player info JSON', query={'mvId': video_id})

        title = play_info['mvInfo']['MVTITLE']

        info = self._download_json(
            'http://vod.melon.com/delivery/streamingInfo.json', video_id,
            note='Downloading streaming info JSON',
            query={
                'contsId': video_id,
                'contsType': 'VIDEO',
            })

        stream_info = info['streamingInfo']

        formats = self._extract_m3u8_formats(
            stream_info['encUrl'], video_id, 'mp4', m3u8_id='hls')

        artist_list = play_info.get('artistList')
        artist = None
        if isinstance(artist_list, list):
            artist = ', '.join(
                [a['ARTISTNAMEWEBLIST']
                 for a in artist_list if a.get('ARTISTNAMEWEBLIST')])

        thumbnail = urljoin(info.get('staticDomain'), stream_info.get('imgPath'))

        duration = int_or_none(stream_info.get('playTime'))
        upload_date = stream_info.get('mvSvcOpenDt', '')[:8] or None

        return {
            'id': video_id,
            'title': title,
            'artist': artist,
            'thumbnail': thumbnail,
            'upload_date': upload_date,
            'duration': duration,
            'formats': formats,
        }