# coding: utf-8
from __future__ import unicode_literals
from .common import InfoExtractor
from ..utils import ExtractorError


class MicrosoftStreamBaseIE(InfoExtractor):
    _LOGIN_URL = 'https://web.microsoftstream.com/?noSignUpCheck=1'     # expect redirection
    _EXPECTED_TITLE = '<title>Microsoft Stream</title>'

    def is_logged_in(self, webpage):
        return self._EXPECTED_TITLE in webpage

    def _real_initialize(self):
        username, password = self._get_login_info()

        if username is not None or password is not None:
            raise ExtractorError('MicrosoftStream Extractor does not support username/password log-in at the moment. Please use cookies log-in instead. See https://github.com/ytdl-org/youtube-dl/blob/master/README.md#how-do-i-pass-cookies-to-youtube-dl for more information')


class MicrosoftStreamIE(MicrosoftStreamBaseIE):
    IE_NAME = 'microsoftstream'
    _VALID_URL = r'https?://(?:(?:web|www)\.)?microsoftstream\.com/video/(?P<id>[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})'  # https://regex101.com/r/K1mlgK/1/
    _NETRC_MACHINE = 'microsoftstream'

    _TEST = {
        'url': 'https://web.microsoftstream.com/video/c883c6a5-9895-4900-9a35-62f4b5d506c9',
        'info_dict': {
            'id': 'c883c6a5-9895-4900-9a35-62f4b5d506c9',
            'ext': 'mp4',
            'title': 'Webinar for Researchers: Use of GitLab',
            'thumbnail': r're:^https?://.*$',
        }
    }

    def _remap_thumbnails(self, thumbnail_dict_list):
        output = []
        preference_index = ['extraSmall', 'small', 'medium', 'large']

        for _, key in enumerate(thumbnail_dict_list):
            output.append({
                'preference': preference_index.index(key),
                'url': thumbnail_dict_list[key]['url']
            })
        return output

    def _remap_playback(self, master_playlist_urls, video_id, http_headers={}):
        """
         A parser for the HLS and MPD playlists from the API endpoint.
        """
        output = []

        for master_playlist_url in master_playlist_urls:
            # Handle HLS Master playlist
            if self._determine_protocol(master_playlist_url['mimeType']) == 'm3u8':
                varient_playlists = self._extract_m3u8_formats(master_playlist_url['playbackUrl'], video_id, headers=http_headers)

            # For MPEG-DASH Master playlists
            elif self._determine_protocol(master_playlist_url['mimeType']) == 'http_dash_segments':
                varient_playlists = self._extract_mpd_formats(master_playlist_url['playbackUrl'], video_id, headers=http_headers)

            else:
                self.to_screen('Found unresolvable stream with format %s' % master_playlist_url['mimeType'])
                continue

            # Patching the "Authorization" header
            for varient_playlist in varient_playlists:
                varient_playlist['http_headers'] = http_headers
                output.append(varient_playlist)

        return output

    def _determine_protocol(self, mime):
        """
         A switch board for the MIME type provided from the API endpoint.
        """
        if mime in ['application/dash+xml']:
            return 'http_dash_segments'
        elif mime in ['application/vnd.apple.mpegurl']:
            return 'm3u8'
        else:
            return None

    def _remap_texttracks(self, tracks):
        """
         A parser for the texttracks response.
        """
        subtitle = {}
        automatic_captions = {}
        for track in tracks:
            if track['autoGenerated'] is True:
                if track['language'] not in automatic_captions:
                    automatic_captions[track['language']] = []
                automatic_captions[track['language']].append({'url': track['url']})
            else:
                if track['language'] not in subtitle:
                    subtitle[track['language']] = []
                subtitle[track['language']].append({'url': track['url']})
        return (subtitle, automatic_captions)

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

        if not self.is_logged_in(webpage):
            return self.raise_login_required()

        # Extract access token from webpage
        accessToken = self._html_search_regex(r"\"AccessToken\":\"(?P<AccessToken>.+?)\"", webpage, 'AccessToken')
        apiGateway = self._html_search_regex(r"\"ApiGatewayUri\":\"(?P<APIGateway>.+?)\"", webpage, 'APIGateway')
        headers = {'Authorization': 'Bearer %s' % accessToken}

        # "GET" api for video information
        apiUri = "%s/videos/%s?$expand=creator,tokens,status,liveEvent,extensions&api-version=1.3-private" % (apiGateway, video_id)
        apiCall = self._download_json(apiUri, video_id, headers=headers)

        # "GET" api for subtitles and auto-captions
        texttracksUri = "%s/videos/%s/texttracks?api-version=1.3-private" % (apiGateway, video_id)
        texttracksCall = self._download_json(texttracksUri, video_id, headers=headers)['value']
        subtitles, automatic_captions = self._remap_texttracks(texttracksCall)

        return {
            'id': video_id,
            'title': apiCall['name'],
            'description': apiCall['description'],
            'uploader': apiCall['creator']['name'],
            'thumbnails': self._remap_thumbnails(apiCall['posterImage']),
            'formats': self._remap_playback(apiCall['playbackUrls'], video_id, http_headers=headers),
            'subtitles': subtitles,
            'automatic_captions': automatic_captions,
            'is_live': False,
            # 'duration': apiCall['media']['duration'],
        }