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# coding: utf-8
from __future__ import unicode_literals

import hashlib
import hmac
import json
import re
import time
import uuid

from .common import InfoExtractor
from ..compat import (
    compat_HTTPError,
    compat_str,
)
from ..utils import (
    determine_ext,
    ExtractorError,
    int_or_none,
    str_or_none,
    try_get,
    url_or_none,
)


class HotStarBaseIE(InfoExtractor):
    _AKAMAI_ENCRYPTION_KEY = b'\x05\xfc\x1a\x01\xca\xc9\x4b\xc4\x12\xfc\x53\x12\x07\x75\xf9\xee'

    def _call_api_impl(self, path, video_id, headers, query, data=None):
        st = int(time.time())
        exp = st + 6000
        auth = 'st=%d~exp=%d~acl=/*' % (st, exp)
        auth += '~hmac=' + hmac.new(self._AKAMAI_ENCRYPTION_KEY, auth.encode(), hashlib.sha256).hexdigest()
        h = {'hotstarauth': auth}
        h.update(headers)
        return self._download_json(
            'https://api.hotstar.com/' + path,
            video_id, headers=h, query=query, data=data)

    def _call_api(self, path, video_id, query_name='contentId'):
        response = self._call_api_impl(path, video_id, {
            'x-country-code': 'IN',
            'x-platform-code': 'JIO',
        }, {
            query_name: video_id,
            'tas': 10000,
        })
        if response['statusCode'] != 'OK':
            raise ExtractorError(
                response['body']['message'], expected=True)
        return response['body']['results']

    def _call_api_v2(self, path, video_id, headers, query=None, data=None):
        h = {'X-Request-Id': compat_str(uuid.uuid4())}
        h.update(headers)
        try:
            return self._call_api_impl(
                path, video_id, h, query, data)
        except ExtractorError as e:
            if isinstance(e.cause, compat_HTTPError):
                if e.cause.code == 402:
                    self.raise_login_required()
                message = self._parse_json(e.cause.read().decode(), video_id)['message']
                if message in ('Content not available in region', 'Country is not supported'):
                    raise self.raise_geo_restricted(message)
                raise ExtractorError(message)
            raise e


class HotStarIE(HotStarBaseIE):
    IE_NAME = 'hotstar'
    _VALID_URL = r'https?://(?:www\.)?hotstar\.com/(?:.+[/-])?(?P<id>\d{10})'
    _TESTS = [{
        # contentData
        'url': 'https://www.hotstar.com/can-you-not-spread-rumours/1000076273',
        'info_dict': {
            'id': '1000076273',
            'ext': 'mp4',
            'title': 'Can You Not Spread Rumours?',
            'description': 'md5:c957d8868e9bc793ccb813691cc4c434',
            'timestamp': 1447248600,
            'upload_date': '20151111',
            'duration': 381,
        },
        'params': {
            # m3u8 download
            'skip_download': True,
        }
    }, {
        # contentDetail
        'url': 'https://www.hotstar.com/movies/radha-gopalam/1000057157',
        'only_matching': True,
    }, {
        'url': 'http://www.hotstar.com/sports/cricket/rajitha-sizzles-on-debut-with-329/2001477583',
        'only_matching': True,
    }, {
        'url': 'http://www.hotstar.com/1000000515',
        'only_matching': True,
    }, {
        # only available via api v2
        'url': 'https://www.hotstar.com/tv/ek-bhram-sarvagun-sampanna/s-2116/janhvi-targets-suman/1000234847',
        'only_matching': True,
    }, {
        'url': 'https://www.hotstar.com/in/tv/start-music/1260005217/cooks-vs-comalis/1100039717',
        'only_matching': True,
    }]
    _GEO_BYPASS = False
    _DEVICE_ID = None
    _USER_TOKEN = None

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

        webpage = self._download_webpage(url, video_id)
        app_state = self._parse_json(self._search_regex(
            r'<script>window\.APP_STATE\s*=\s*({.+?})</script>',
            webpage, 'app state'), video_id)
        video_data = {}
        getters = list(
            lambda x, k=k: x['initialState']['content%s' % k]['content']
            for k in ('Data', 'Detail')
        )
        for v in app_state.values():
            content = try_get(v, getters, dict)
            if content and content.get('contentId') == video_id:
                video_data = content
                break

        title = video_data['title']

        if video_data.get('drmProtected'):
            raise ExtractorError('This video is DRM protected.', expected=True)

        headers = {'Referer': url}
        formats = []
        geo_restricted = False

        if not self._USER_TOKEN:
            self._DEVICE_ID = compat_str(uuid.uuid4())
            self._USER_TOKEN = self._call_api_v2('um/v3/users', video_id, {
                'X-HS-Platform': 'PCTV',
                'Content-Type': 'application/json',
            }, data=json.dumps({
                'device_ids': [{
                    'id': self._DEVICE_ID,
                    'type': 'device_id',
                }],
            }).encode())['user_identity']

        playback_sets = self._call_api_v2(
            'play/v2/playback/content/' + video_id, video_id, {
                'X-HS-Platform': 'web',
                'X-HS-AppVersion': '6.99.1',
                'X-HS-UserToken': self._USER_TOKEN,
            }, query={
                'device-id': self._DEVICE_ID,
                'desired-config': 'encryption:plain',
                'os-name': 'Windows',
                'os-version': '10',
            })['data']['playBackSets']
        for playback_set in playback_sets:
            if not isinstance(playback_set, dict):
                continue
            format_url = url_or_none(playback_set.get('playbackUrl'))
            if not format_url:
                continue
            format_url = re.sub(
                r'(?<=//staragvod)(\d)', r'web\1', format_url)
            tags = str_or_none(playback_set.get('tagsCombination')) or ''
            if tags and 'encryption:plain' not in tags:
                continue
            ext = determine_ext(format_url)
            try:
                if 'package:hls' in tags or ext == 'm3u8':
                    formats.extend(self._extract_m3u8_formats(
                        format_url, video_id, 'mp4',
                        entry_protocol='m3u8_native',
                        m3u8_id='hls', headers=headers))
                elif 'package:dash' in tags or ext == 'mpd':
                    formats.extend(self._extract_mpd_formats(
                        format_url, video_id, mpd_id='dash', headers=headers))
                elif ext == 'f4m':
                    # produce broken files
                    pass
                else:
                    formats.append({
                        'url': format_url,
                        'width': int_or_none(playback_set.get('width')),
                        'height': int_or_none(playback_set.get('height')),
                    })
            except ExtractorError as e:
                if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
                    geo_restricted = True
                continue
        if not formats and geo_restricted:
            self.raise_geo_restricted(countries=['IN'])
        self._sort_formats(formats)

        for f in formats:
            f.setdefault('http_headers', {}).update(headers)

        image = try_get(video_data, lambda x: x['image']['h'], compat_str)

        return {
            'id': video_id,
            'title': title,
            'thumbnail': 'https://img1.hotstarext.com/image/upload/' + image if image else None,
            'description': video_data.get('description'),
            'duration': int_or_none(video_data.get('duration')),
            'timestamp': int_or_none(video_data.get('broadcastDate') or video_data.get('startDate')),
            'formats': formats,
            'channel': video_data.get('channelName'),
            'channel_id': str_or_none(video_data.get('channelId')),
            'series': video_data.get('showName'),
            'season': video_data.get('seasonName'),
            'season_number': int_or_none(video_data.get('seasonNo')),
            'season_id': str_or_none(video_data.get('seasonId')),
            'episode': title,
            'episode_number': int_or_none(video_data.get('episodeNo')),
        }


class HotStarPlaylistIE(HotStarBaseIE):
    IE_NAME = 'hotstar:playlist'
    _VALID_URL = r'https?://(?:www\.)?hotstar\.com/(?:[a-z]{2}/)?tv/[^/]+/s-\w+/list/[^/]+/t-(?P<id>\w+)'
    _TESTS = [{
        'url': 'https://www.hotstar.com/tv/savdhaan-india/s-26/list/popular-clips/t-3_2_26',
        'info_dict': {
            'id': '3_2_26',
        },
        'playlist_mincount': 20,
    }, {
        'url': 'https://www.hotstar.com/tv/savdhaan-india/s-26/list/extras/t-2480',
        'only_matching': True,
    }, {
        'url': 'https://www.hotstar.com/us/tv/masterchef-india/s-830/list/episodes/t-1_2_830',
        'only_matching': True,
    }]

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

        collection = self._call_api('o/v1/tray/find', playlist_id, 'uqId')

        entries = [
            self.url_result(
                'https://www.hotstar.com/%s' % video['contentId'],
                ie=HotStarIE.ie_key(), video_id=video['contentId'])
            for video in collection['assets']['items']
            if video.get('contentId')]

        return self.playlist_result(entries, playlist_id)