# coding: utf-8
from __future__ import unicode_literals

import re
import json
import xml.etree.ElementTree as etree
import zlib

from hashlib import sha1
from math import pow, sqrt, floor
from .common import InfoExtractor
from .vrv import VRVIE
from ..compat import (
    compat_b64decode,
    compat_etree_fromstring,
    compat_urllib_parse_urlencode,
    compat_urllib_request,
    compat_urlparse,
)
from ..utils import (
    ExtractorError,
    bytes_to_intlist,
    extract_attributes,
    float_or_none,
    intlist_to_bytes,
    int_or_none,
    lowercase_escape,
    remove_end,
    sanitized_Request,
    unified_strdate,
    urlencode_postdata,
    xpath_text,
)
from ..aes import (
    aes_cbc_decrypt,
)


class CrunchyrollBaseIE(InfoExtractor):
    _LOGIN_URL = 'https://www.crunchyroll.com/login'
    _LOGIN_FORM = 'login_form'
    _NETRC_MACHINE = 'crunchyroll'

    def _call_rpc_api(self, method, video_id, note=None, data=None):
        data = data or {}
        data['req'] = 'RpcApi' + method
        data = compat_urllib_parse_urlencode(data).encode('utf-8')
        return self._download_xml(
            'https://www.crunchyroll.com/xml/',
            video_id, note, fatal=False, data=data, headers={
                'Content-Type': 'application/x-www-form-urlencoded',
            })

    def _login(self):
        username, password = self._get_login_info()
        if username is None:
            return

        self._download_webpage(
            'https://www.crunchyroll.com/?a=formhandler',
            None, 'Logging in', 'Wrong login info',
            data=urlencode_postdata({
                'formname': 'RpcApiUser_Login',
                'next_url': 'https://www.crunchyroll.com/acct/membership',
                'name': username,
                'password': password,
            }))

        '''
        login_page = self._download_webpage(
            self._LOGIN_URL, None, 'Downloading login page')

        def is_logged(webpage):
            return '<title>Redirecting' in webpage

        # Already logged in
        if is_logged(login_page):
            return

        login_form_str = self._search_regex(
            r'(?P<form><form[^>]+?id=(["\'])%s\2[^>]*>)' % self._LOGIN_FORM,
            login_page, 'login form', group='form')

        post_url = extract_attributes(login_form_str).get('action')
        if not post_url:
            post_url = self._LOGIN_URL
        elif not post_url.startswith('http'):
            post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)

        login_form = self._form_hidden_inputs(self._LOGIN_FORM, login_page)

        login_form.update({
            'login_form[name]': username,
            'login_form[password]': password,
        })

        response = self._download_webpage(
            post_url, None, 'Logging in', 'Wrong login info',
            data=urlencode_postdata(login_form),
            headers={'Content-Type': 'application/x-www-form-urlencoded'})

        # Successful login
        if is_logged(response):
            return

        error = self._html_search_regex(
            '(?s)<ul[^>]+class=["\']messages["\'][^>]*>(.+?)</ul>',
            response, 'error message', default=None)
        if error:
            raise ExtractorError('Unable to login: %s' % error, expected=True)

        raise ExtractorError('Unable to log in')
        '''

    def _real_initialize(self):
        self._login()

    def _download_webpage(self, url_or_request, *args, **kwargs):
        request = (url_or_request if isinstance(url_or_request, compat_urllib_request.Request)
                   else sanitized_Request(url_or_request))
        # Accept-Language must be set explicitly to accept any language to avoid issues
        # similar to https://github.com/rg3/youtube-dl/issues/6797.
        # Along with IP address Crunchyroll uses Accept-Language to guess whether georestriction
        # should be imposed or not (from what I can see it just takes the first language
        # ignoring the priority and requires it to correspond the IP). By the way this causes
        # Crunchyroll to not work in georestriction cases in some browsers that don't place
        # the locale lang first in header. However allowing any language seems to workaround the issue.
        request.add_header('Accept-Language', '*')
        return super(CrunchyrollBaseIE, self)._download_webpage(request, *args, **kwargs)

    @staticmethod
    def _add_skip_wall(url):
        parsed_url = compat_urlparse.urlparse(url)
        qs = compat_urlparse.parse_qs(parsed_url.query)
        # Always force skip_wall to bypass maturity wall, namely 18+ confirmation message:
        # > This content may be inappropriate for some people.
        # > Are you sure you want to continue?
        # since it's not disabled by default in crunchyroll account's settings.
        # See https://github.com/rg3/youtube-dl/issues/7202.
        qs['skip_wall'] = ['1']
        return compat_urlparse.urlunparse(
            parsed_url._replace(query=compat_urllib_parse_urlencode(qs, True)))


class CrunchyrollIE(CrunchyrollBaseIE, VRVIE):
    IE_NAME = 'crunchyroll'
    _VALID_URL = r'https?://(?:(?P<prefix>www|m)\.)?(?P<url>crunchyroll\.(?:com|fr)/(?:media(?:-|/\?id=)|(?:[^/]*/){1,2}[^/?&]*?)(?P<video_id>[0-9]+))(?:[/?&]|$)'
    _TESTS = [{
        'url': 'http://www.crunchyroll.com/wanna-be-the-strongest-in-the-world/episode-1-an-idol-wrestler-is-born-645513',
        'info_dict': {
            'id': '645513',
            'ext': 'mp4',
            'title': 'Wanna be the Strongest in the World Episode 1 – An Idol-Wrestler is Born!',
            'description': 'md5:2d17137920c64f2f49981a7797d275ef',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'Yomiuri Telecasting Corporation (YTV)',
            'upload_date': '20131013',
            'url': 're:(?!.*&amp)',
        },
        'params': {
            # rtmp
            'skip_download': True,
        },
    }, {
        'url': 'http://www.crunchyroll.com/media-589804/culture-japan-1',
        'info_dict': {
            'id': '589804',
            'ext': 'flv',
            'title': 'Culture Japan Episode 1 – Rebuilding Japan after the 3.11',
            'description': 'md5:2fbc01f90b87e8e9137296f37b461c12',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'Danny Choo Network',
            'upload_date': '20120213',
        },
        'params': {
            # rtmp
            'skip_download': True,
        },
        'skip': 'Video gone',
    }, {
        'url': 'http://www.crunchyroll.com/rezero-starting-life-in-another-world-/episode-5-the-morning-of-our-promise-is-still-distant-702409',
        'info_dict': {
            'id': '702409',
            'ext': 'mp4',
            'title': 'Re:ZERO -Starting Life in Another World- Episode 5 – The Morning of Our Promise Is Still Distant',
            'description': 'md5:97664de1ab24bbf77a9c01918cb7dca9',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'TV TOKYO',
            'upload_date': '20160508',
        },
        'params': {
            # m3u8 download
            'skip_download': True,
        },
    }, {
        'url': 'http://www.crunchyroll.com/konosuba-gods-blessing-on-this-wonderful-world/episode-1-give-me-deliverance-from-this-judicial-injustice-727589',
        'info_dict': {
            'id': '727589',
            'ext': 'mp4',
            'title': "KONOSUBA -God's blessing on this wonderful world! 2 Episode 1 – Give Me Deliverance From This Judicial Injustice!",
            'description': 'md5:cbcf05e528124b0f3a0a419fc805ea7d',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'Kadokawa Pictures Inc.',
            'upload_date': '20170118',
            'series': "KONOSUBA -God's blessing on this wonderful world!",
            'season': "KONOSUBA -God's blessing on this wonderful world! 2",
            'season_number': 2,
            'episode': 'Give Me Deliverance From This Judicial Injustice!',
            'episode_number': 1,
        },
        'params': {
            # m3u8 download
            'skip_download': True,
        },
    }, {
        'url': 'http://www.crunchyroll.fr/girl-friend-beta/episode-11-goodbye-la-mode-661697',
        'only_matching': True,
    }, {
        # geo-restricted (US), 18+ maturity wall, non-premium available
        'url': 'http://www.crunchyroll.com/cosplay-complex-ova/episode-1-the-birth-of-the-cosplay-club-565617',
        'only_matching': True,
    }, {
        # A description with double quotes
        'url': 'http://www.crunchyroll.com/11eyes/episode-1-piros-jszaka-red-night-535080',
        'info_dict': {
            'id': '535080',
            'ext': 'mp4',
            'title': '11eyes Episode 1 – Red Night ~ Piros éjszaka',
            'description': 'Kakeru and Yuka are thrown into an alternate nightmarish world they call "Red Night".',
            'uploader': 'Marvelous AQL Inc.',
            'upload_date': '20091021',
        },
        'params': {
            # Just test metadata extraction
            'skip_download': True,
        },
    }, {
        # make sure we can extract an uploader name that's not a link
        'url': 'http://www.crunchyroll.com/hakuoki-reimeiroku/episode-1-dawn-of-the-divine-warriors-606899',
        'info_dict': {
            'id': '606899',
            'ext': 'mp4',
            'title': 'Hakuoki Reimeiroku Episode 1 – Dawn of the Divine Warriors',
            'description': 'Ryunosuke was left to die, but Serizawa-san asked him a simple question "Do you want to live?"',
            'uploader': 'Geneon Entertainment',
            'upload_date': '20120717',
        },
        'params': {
            # just test metadata extraction
            'skip_download': True,
        },
    }, {
        # A video with a vastly different season name compared to the series name
        'url': 'http://www.crunchyroll.com/nyarko-san-another-crawling-chaos/episode-1-test-590532',
        'info_dict': {
            'id': '590532',
            'ext': 'mp4',
            'title': 'Haiyoru! Nyaruani (ONA) Episode 1 – Test',
            'description': 'Mahiro and Nyaruko talk about official certification.',
            'uploader': 'TV TOKYO',
            'upload_date': '20120305',
            'series': 'Nyarko-san: Another Crawling Chaos',
            'season': 'Haiyoru! Nyaruani (ONA)',
        },
        'params': {
            # Just test metadata extraction
            'skip_download': True,
        },
    }, {
        'url': 'http://www.crunchyroll.com/media-723735',
        'only_matching': True,
    }, {
        'url': 'https://www.crunchyroll.com/en-gb/mob-psycho-100/episode-2-urban-legends-encountering-rumors-780921',
        'only_matching': True,
    }]

    _FORMAT_IDS = {
        '360': ('60', '106'),
        '480': ('61', '106'),
        '720': ('62', '106'),
        '1080': ('80', '108'),
    }

    def _decrypt_subtitles(self, data, iv, id):
        data = bytes_to_intlist(compat_b64decode(data))
        iv = bytes_to_intlist(compat_b64decode(iv))
        id = int(id)

        def obfuscate_key_aux(count, modulo, start):
            output = list(start)
            for _ in range(count):
                output.append(output[-1] + output[-2])
            # cut off start values
            output = output[2:]
            output = list(map(lambda x: x % modulo + 33, output))
            return output

        def obfuscate_key(key):
            num1 = int(floor(pow(2, 25) * sqrt(6.9)))
            num2 = (num1 ^ key) << 5
            num3 = key ^ num1
            num4 = num3 ^ (num3 >> 3) ^ num2
            prefix = intlist_to_bytes(obfuscate_key_aux(20, 97, (1, 2)))
            shaHash = bytes_to_intlist(sha1(prefix + str(num4).encode('ascii')).digest())
            # Extend 160 Bit hash to 256 Bit
            return shaHash + [0] * 12

        key = obfuscate_key(id)

        decrypted_data = intlist_to_bytes(aes_cbc_decrypt(data, key, iv))
        return zlib.decompress(decrypted_data)

    def _convert_subtitles_to_srt(self, sub_root):
        output = ''

        for i, event in enumerate(sub_root.findall('./events/event'), 1):
            start = event.attrib['start'].replace('.', ',')
            end = event.attrib['end'].replace('.', ',')
            text = event.attrib['text'].replace('\\N', '\n')
            output += '%d\n%s --> %s\n%s\n\n' % (i, start, end, text)
        return output

    def _convert_subtitles_to_ass(self, sub_root):
        output = ''

        def ass_bool(strvalue):
            assvalue = '0'
            if strvalue == '1':
                assvalue = '-1'
            return assvalue

        output = '[Script Info]\n'
        output += 'Title: %s\n' % sub_root.attrib['title']
        output += 'ScriptType: v4.00+\n'
        output += 'WrapStyle: %s\n' % sub_root.attrib['wrap_style']
        output += 'PlayResX: %s\n' % sub_root.attrib['play_res_x']
        output += 'PlayResY: %s\n' % sub_root.attrib['play_res_y']
        output += """
[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
"""
        for style in sub_root.findall('./styles/style'):
            output += 'Style: ' + style.attrib['name']
            output += ',' + style.attrib['font_name']
            output += ',' + style.attrib['font_size']
            output += ',' + style.attrib['primary_colour']
            output += ',' + style.attrib['secondary_colour']
            output += ',' + style.attrib['outline_colour']
            output += ',' + style.attrib['back_colour']
            output += ',' + ass_bool(style.attrib['bold'])
            output += ',' + ass_bool(style.attrib['italic'])
            output += ',' + ass_bool(style.attrib['underline'])
            output += ',' + ass_bool(style.attrib['strikeout'])
            output += ',' + style.attrib['scale_x']
            output += ',' + style.attrib['scale_y']
            output += ',' + style.attrib['spacing']
            output += ',' + style.attrib['angle']
            output += ',' + style.attrib['border_style']
            output += ',' + style.attrib['outline']
            output += ',' + style.attrib['shadow']
            output += ',' + style.attrib['alignment']
            output += ',' + style.attrib['margin_l']
            output += ',' + style.attrib['margin_r']
            output += ',' + style.attrib['margin_v']
            output += ',' + style.attrib['encoding']
            output += '\n'

        output += """
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
"""
        for event in sub_root.findall('./events/event'):
            output += 'Dialogue: 0'
            output += ',' + event.attrib['start']
            output += ',' + event.attrib['end']
            output += ',' + event.attrib['style']
            output += ',' + event.attrib['name']
            output += ',' + event.attrib['margin_l']
            output += ',' + event.attrib['margin_r']
            output += ',' + event.attrib['margin_v']
            output += ',' + event.attrib['effect']
            output += ',' + event.attrib['text']
            output += '\n'

        return output

    def _extract_subtitles(self, subtitle):
        sub_root = compat_etree_fromstring(subtitle)
        return [{
            'ext': 'srt',
            'data': self._convert_subtitles_to_srt(sub_root),
        }, {
            'ext': 'ass',
            'data': self._convert_subtitles_to_ass(sub_root),
        }]

    def _get_subtitles(self, video_id, webpage):
        subtitles = {}
        for sub_id, sub_name in re.findall(r'\bssid=([0-9]+)"[^>]+?\btitle="([^"]+)', webpage):
            sub_doc = self._call_rpc_api(
                'Subtitle_GetXml', video_id,
                'Downloading subtitles for ' + sub_name, data={
                    'subtitle_script_id': sub_id,
                })
            if not isinstance(sub_doc, etree.Element):
                continue
            sid = sub_doc.get('id')
            iv = xpath_text(sub_doc, 'iv', 'subtitle iv')
            data = xpath_text(sub_doc, 'data', 'subtitle data')
            if not sid or not iv or not data:
                continue
            subtitle = self._decrypt_subtitles(data, iv, sid).decode('utf-8')
            lang_code = self._search_regex(r'lang_code=["\']([^"\']+)', subtitle, 'subtitle_lang_code', fatal=False)
            if not lang_code:
                continue
            subtitles[lang_code] = self._extract_subtitles(subtitle)
        return subtitles

    def _real_extract(self, url):
        mobj = re.match(self._VALID_URL, url)
        video_id = mobj.group('video_id')

        if mobj.group('prefix') == 'm':
            mobile_webpage = self._download_webpage(url, video_id, 'Downloading mobile webpage')
            webpage_url = self._search_regex(r'<link rel="canonical" href="([^"]+)" />', mobile_webpage, 'webpage_url')
        else:
            webpage_url = 'http://www.' + mobj.group('url')

        webpage = self._download_webpage(
            self._add_skip_wall(webpage_url), video_id,
            headers=self.geo_verification_headers())
        note_m = self._html_search_regex(
            r'<div class="showmedia-trailer-notice">(.+?)</div>',
            webpage, 'trailer-notice', default='')
        if note_m:
            raise ExtractorError(note_m)

        mobj = re.search(r'Page\.messaging_box_controller\.addItems\(\[(?P<msg>{.+?})\]\)', webpage)
        if mobj:
            msg = json.loads(mobj.group('msg'))
            if msg.get('type') == 'error':
                raise ExtractorError('crunchyroll returned error: %s' % msg['message_body'], expected=True)

        if 'To view this, please log in to verify you are 18 or older.' in webpage:
            self.raise_login_required()

        media = self._parse_json(self._search_regex(
            r'vilos\.config\.media\s*=\s*({.+?});',
            webpage, 'vilos media', default='{}'), video_id)
        media_metadata = media.get('metadata') or {}

        language = self._search_regex(
            r'(?:vilos\.config\.player\.language|LOCALE)\s*=\s*(["\'])(?P<lang>(?:(?!\1).)+)\1',
            webpage, 'language', default=None, group='lang')

        video_title = self._html_search_regex(
            r'(?s)<h1[^>]*>((?:(?!<h1).)*?<span[^>]+itemprop=["\']title["\'][^>]*>(?:(?!<h1).)+?)</h1>',
            webpage, 'video_title')
        video_title = re.sub(r' {2,}', ' ', video_title)
        video_description = (self._parse_json(self._html_search_regex(
            r'<script[^>]*>\s*.+?\[media_id=%s\].+?({.+?"description"\s*:.+?})\);' % video_id,
            webpage, 'description', default='{}'), video_id) or media_metadata).get('description')
        if video_description:
            video_description = lowercase_escape(video_description.replace(r'\r\n', '\n'))
        video_upload_date = self._html_search_regex(
            [r'<div>Availability for free users:(.+?)</div>', r'<div>[^<>]+<span>\s*(.+?\d{4})\s*</span></div>'],
            webpage, 'video_upload_date', fatal=False, flags=re.DOTALL)
        if video_upload_date:
            video_upload_date = unified_strdate(video_upload_date)
        video_uploader = self._html_search_regex(
            # try looking for both an uploader that's a link and one that's not
            [r'<a[^>]+href="/publisher/[^"]+"[^>]*>([^<]+)</a>', r'<div>\s*Publisher:\s*<span>\s*(.+?)\s*</span>\s*</div>'],
            webpage, 'video_uploader', fatal=False)

        formats = []
        for stream in media.get('streams', []):
            audio_lang = stream.get('audio_lang')
            hardsub_lang = stream.get('hardsub_lang')
            vrv_formats = self._extract_vrv_formats(
                stream.get('url'), video_id, stream.get('format'),
                audio_lang, hardsub_lang)
            for f in vrv_formats:
                if not hardsub_lang:
                    f['preference'] = 1
                language_preference = 0
                if audio_lang == language:
                    language_preference += 1
                if hardsub_lang == language:
                    language_preference += 1
                if language_preference:
                    f['language_preference'] = language_preference
            formats.extend(vrv_formats)
        if not formats:
            available_fmts = []
            for a, fmt in re.findall(r'(<a[^>]+token=["\']showmedia\.([0-9]{3,4})p["\'][^>]+>)', webpage):
                attrs = extract_attributes(a)
                href = attrs.get('href')
                if href and '/freetrial' in href:
                    continue
                available_fmts.append(fmt)
            if not available_fmts:
                for p in (r'token=["\']showmedia\.([0-9]{3,4})p"', r'showmedia\.([0-9]{3,4})p'):
                    available_fmts = re.findall(p, webpage)
                    if available_fmts:
                        break
            if not available_fmts:
                available_fmts = self._FORMAT_IDS.keys()
            video_encode_ids = []

            for fmt in available_fmts:
                stream_quality, stream_format = self._FORMAT_IDS[fmt]
                video_format = fmt + 'p'
                stream_infos = []
                streamdata = self._call_rpc_api(
                    'VideoPlayer_GetStandardConfig', video_id,
                    'Downloading media info for %s' % video_format, data={
                        'media_id': video_id,
                        'video_format': stream_format,
                        'video_quality': stream_quality,
                        'current_page': url,
                    })
                if isinstance(streamdata, etree.Element):
                    stream_info = streamdata.find('./{default}preload/stream_info')
                    if stream_info is not None:
                        stream_infos.append(stream_info)
                stream_info = self._call_rpc_api(
                    'VideoEncode_GetStreamInfo', video_id,
                    'Downloading stream info for %s' % video_format, data={
                        'media_id': video_id,
                        'video_format': stream_format,
                        'video_encode_quality': stream_quality,
                    })
                if isinstance(stream_info, etree.Element):
                    stream_infos.append(stream_info)
                for stream_info in stream_infos:
                    video_encode_id = xpath_text(stream_info, './video_encode_id')
                    if video_encode_id in video_encode_ids:
                        continue
                    video_encode_ids.append(video_encode_id)

                    video_file = xpath_text(stream_info, './file')
                    if not video_file:
                        continue
                    if video_file.startswith('http'):
                        formats.extend(self._extract_m3u8_formats(
                            video_file, video_id, 'mp4', entry_protocol='m3u8_native',
                            m3u8_id='hls', fatal=False))
                        continue

                    video_url = xpath_text(stream_info, './host')
                    if not video_url:
                        continue
                    metadata = stream_info.find('./metadata')
                    format_info = {
                        'format': video_format,
                        'height': int_or_none(xpath_text(metadata, './height')),
                        'width': int_or_none(xpath_text(metadata, './width')),
                    }

                    if '.fplive.net/' in video_url:
                        video_url = re.sub(r'^rtmpe?://', 'http://', video_url.strip())
                        parsed_video_url = compat_urlparse.urlparse(video_url)
                        direct_video_url = compat_urlparse.urlunparse(parsed_video_url._replace(
                            netloc='v.lvlt.crcdn.net',
                            path='%s/%s' % (remove_end(parsed_video_url.path, '/'), video_file.split(':')[-1])))
                        if self._is_valid_url(direct_video_url, video_id, video_format):
                            format_info.update({
                                'format_id': 'http-' + video_format,
                                'url': direct_video_url,
                            })
                            formats.append(format_info)
                            continue

                    format_info.update({
                        'format_id': 'rtmp-' + video_format,
                        'url': video_url,
                        'play_path': video_file,
                        'ext': 'flv',
                    })
                    formats.append(format_info)
        self._sort_formats(formats, ('preference', 'language_preference', 'height', 'width', 'tbr', 'fps'))

        metadata = self._call_rpc_api(
            'VideoPlayer_GetMediaMetadata', video_id,
            note='Downloading media info', data={
                'media_id': video_id,
            })

        subtitles = {}
        for subtitle in media.get('subtitles', []):
            subtitle_url = subtitle.get('url')
            if not subtitle_url:
                continue
            subtitles.setdefault(subtitle.get('language', 'enUS'), []).append({
                'url': subtitle_url,
                'ext': subtitle.get('format', 'ass'),
            })
        if not subtitles:
            subtitles = self.extract_subtitles(video_id, webpage)

        # webpage provide more accurate data than series_title from XML
        series = self._html_search_regex(
            r'(?s)<h\d[^>]+\bid=["\']showmedia_about_episode_num[^>]+>(.+?)</h\d',
            webpage, 'series', fatal=False)

        season = episode = episode_number = duration = thumbnail = None

        if isinstance(metadata, etree.Element):
            season = xpath_text(metadata, 'series_title')
            episode = xpath_text(metadata, 'episode_title')
            episode_number = int_or_none(xpath_text(metadata, 'episode_number'))
            duration = float_or_none(media_metadata.get('duration'), 1000)
            thumbnail = xpath_text(metadata, 'episode_image_url')

        if not episode:
            episode = media_metadata.get('title')
        if not episode_number:
            episode_number = int_or_none(media_metadata.get('episode_number'))
        if not thumbnail:
            thumbnail = media_metadata.get('thumbnail', {}).get('url')

        season_number = int_or_none(self._search_regex(
            r'(?s)<h\d[^>]+id=["\']showmedia_about_episode_num[^>]+>.+?</h\d>\s*<h4>\s*Season (\d+)',
            webpage, 'season number', default=None))

        return {
            'id': video_id,
            'title': video_title,
            'description': video_description,
            'duration': duration,
            'thumbnail': thumbnail,
            'uploader': video_uploader,
            'upload_date': video_upload_date,
            'series': series,
            'season': season,
            'season_number': season_number,
            'episode': episode,
            'episode_number': episode_number,
            'subtitles': subtitles,
            'formats': formats,
        }


class CrunchyrollShowPlaylistIE(CrunchyrollBaseIE):
    IE_NAME = 'crunchyroll:playlist'
    _VALID_URL = r'https?://(?:(?P<prefix>www|m)\.)?(?P<url>crunchyroll\.com/(?!(?:news|anime-news|library|forum|launchcalendar|lineup|store|comics|freetrial|login|media-\d+))(?P<id>[\w\-]+))/?(?:\?|$)'

    _TESTS = [{
        'url': 'http://www.crunchyroll.com/a-bridge-to-the-starry-skies-hoshizora-e-kakaru-hashi',
        'info_dict': {
            'id': 'a-bridge-to-the-starry-skies-hoshizora-e-kakaru-hashi',
            'title': 'A Bridge to the Starry Skies - Hoshizora e Kakaru Hashi'
        },
        'playlist_count': 13,
    }, {
        # geo-restricted (US), 18+ maturity wall, non-premium available
        'url': 'http://www.crunchyroll.com/cosplay-complex-ova',
        'info_dict': {
            'id': 'cosplay-complex-ova',
            'title': 'Cosplay Complex OVA'
        },
        'playlist_count': 3,
        'skip': 'Georestricted',
    }, {
        # geo-restricted (US), 18+ maturity wall, non-premium will be available since 2015.11.14
        'url': 'http://www.crunchyroll.com/ladies-versus-butlers?skip_wall=1',
        'only_matching': True,
    }]

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

        webpage = self._download_webpage(
            self._add_skip_wall(url), show_id,
            headers=self.geo_verification_headers())
        title = self._html_search_regex(
            r'(?s)<h1[^>]*>\s*<span itemprop="name">(.*?)</span>',
            webpage, 'title')
        episode_paths = re.findall(
            r'(?s)<li id="showview_videos_media_(\d+)"[^>]+>.*?<a href="([^"]+)"',
            webpage)
        entries = [
            self.url_result('http://www.crunchyroll.com' + ep, 'Crunchyroll', ep_id)
            for ep_id, ep in episode_paths
        ]
        entries.reverse()

        return {
            '_type': 'playlist',
            'id': show_id,
            'title': title,
            'entries': entries,
        }
