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from __future__ import unicode_literals

import re

from .common import InfoExtractor
from ..utils import (
    compat_parse_qs,
    compat_urllib_parse,
    compat_urllib_request,
    determine_ext,
    ExtractorError,
)


class MetacafeIE(InfoExtractor):
    _VALID_URL = r'http://(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
    _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
    _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
    IE_NAME = 'metacafe'
    _TESTS = [
        # Youtube video
        {
            'add_ie': ['Youtube'],
            'url':  'http://metacafe.com/watch/yt-_aUehQsCQtM/the_electric_company_short_i_pbs_kids_go/',
            'info_dict': {
                'id': '_aUehQsCQtM',
                'ext': 'mp4',
                'upload_date': '20090102',
                'title': 'The Electric Company | "Short I" | PBS KIDS GO!',
                'description': 'md5:2439a8ef6d5a70e380c22f5ad323e5a8',
                'uploader': 'PBS',
                'uploader_id': 'PBS'
            }
        },
        # Normal metacafe video
        {
            'url': 'http://www.metacafe.com/watch/11121940/news_stuff_you_wont_do_with_your_playstation_4/',
            'md5': '6e0bca200eaad2552e6915ed6fd4d9ad',
            'info_dict': {
                'id': '11121940',
                'ext': 'mp4',
                'title': 'News: Stuff You Won\'t Do with Your PlayStation 4',
                'uploader': 'ign',
                'description': 'Sony released a massive FAQ on the PlayStation Blog detailing the PS4\'s capabilities and limitations.',
            },
        },
        # AnyClip video
        {
            'url': 'http://www.metacafe.com/watch/an-dVVXnuY7Jh77J/the_andromeda_strain_1971_stop_the_bomb_part_3/',
            'info_dict': {
                'id': 'an-dVVXnuY7Jh77J',
                'ext': 'mp4',
                'title': 'The Andromeda Strain (1971): Stop the Bomb Part 3',
                'uploader': 'anyclip',
                'description': 'md5:38c711dd98f5bb87acf973d573442e67',
            },
        },
        # age-restricted video
        {
            'url': 'http://www.metacafe.com/watch/5186653/bbc_internal_christmas_tape_79_uncensored_outtakes_etc/',
            'md5': '98dde7c1a35d02178e8ab7560fe8bd09',
            'info_dict': {
                'id': '5186653',
                'ext': 'mp4',
                'title': 'BBC INTERNAL Christmas Tape \'79 - UNCENSORED Outtakes, Etc.',
                'uploader': 'Dwayne Pipe',
                'description': 'md5:950bf4c581e2c059911fa3ffbe377e4b',
                'age_limit': 18,
            },
        },
        # cbs video
        {
            'url': 'http://www.metacafe.com/watch/cb-8VD4r_Zws8VP/open_this_is_face_the_nation_february_9/',
            'info_dict': {
                'id': '8VD4r_Zws8VP',
                'ext': 'flv',
                'title': 'Open: This is Face the Nation, February 9',
                'description': 'md5:8a9ceec26d1f7ed6eab610834cc1a476',
                'duration': 96,
            },
            'params': {
                # rtmp download
                'skip_download': True,
            },
        },
    ]

    def report_disclaimer(self):
        self.to_screen('Retrieving disclaimer')

    def _real_initialize(self):
        # Retrieve disclaimer
        self.report_disclaimer()
        self._download_webpage(self._DISCLAIMER, None, False, 'Unable to retrieve disclaimer')

        # Confirm age
        disclaimer_form = {
            'filters': '0',
            'submit': "Continue - I'm over 18",
        }
        request = compat_urllib_request.Request(self._FILTER_POST, compat_urllib_parse.urlencode(disclaimer_form))
        request.add_header('Content-Type', 'application/x-www-form-urlencoded')
        self.report_age_confirmation()
        self._download_webpage(request, None, False, 'Unable to confirm age')

    def _real_extract(self, url):
        # Extract id and simplified title from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            raise ExtractorError('Invalid URL: %s' % url)

        video_id = mobj.group(1)

        # the video may come from an external site
        m_external = re.match('^(\w{2})-(.*)$', video_id)
        if m_external is not None:
            prefix, ext_id = m_external.groups()
            # Check if video comes from YouTube
            if prefix == 'yt':
                return self.url_result('http://www.youtube.com/watch?v=%s' % ext_id, 'Youtube')
            # CBS videos use theplatform.com
            if prefix == 'cb':
                return self.url_result('theplatform:%s' % ext_id, 'ThePlatform')

        # Retrieve video webpage to extract further information
        req = compat_urllib_request.Request('http://www.metacafe.com/watch/%s/' % video_id)

        # AnyClip videos require the flashversion cookie so that we get the link
        # to the mp4 file
        mobj_an = re.match(r'^an-(.*?)$', video_id)
        if mobj_an:
            req.headers['Cookie'] = 'flashVersion=0;'
        webpage = self._download_webpage(req, video_id)

        # Extract URL, uploader and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
        if mobj is not None:
            mediaURL = compat_urllib_parse.unquote(mobj.group(1))
            video_ext = mediaURL[-3:]

            # Extract gdaKey if available
            mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
            if mobj is None:
                video_url = mediaURL
            else:
                gdaKey = mobj.group(1)
                video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
        else:
            mobj = re.search(r'<video src="([^"]+)"', webpage)
            if mobj:
                video_url = mobj.group(1)
                video_ext = 'mp4'
            else:
                flashvars = self._search_regex(
                    r' name="flashvars" value="(.*?)"', webpage, 'flashvars')
                vardict = compat_parse_qs(flashvars)
                if 'mediaData' not in vardict:
                    raise ExtractorError('Unable to extract media URL')
                mobj = re.search(
                    r'"mediaURL":"(?P<mediaURL>http.*?)",(.*?)"key":"(?P<key>.*?)"', vardict['mediaData'][0])
                if mobj is None:
                    raise ExtractorError('Unable to extract media URL')
                mediaURL = mobj.group('mediaURL').replace('\\/', '/')
                video_url = '%s?__gda__=%s' % (mediaURL, mobj.group('key'))
                video_ext = determine_ext(video_url)

        video_title = self._html_search_regex(
            r'(?im)<title>(.*) - Video</title>', webpage, 'title')
        description = self._og_search_description(webpage)
        thumbnail = self._og_search_thumbnail(webpage)
        video_uploader = self._html_search_regex(
                r'submitter=(.*?);|googletag\.pubads\(\)\.setTargeting\("(?:channel|submiter)","([^"]+)"\);',
                webpage, 'uploader nickname', fatal=False)

        if re.search(r'"contentRating":"restricted"', webpage) is not None:
            age_limit = 18
        else:
            age_limit = 0

        return {
            'id': video_id,
            'url': video_url,
            'description': description,
            'uploader': video_uploader,
            'title': video_title,
            'thumbnail': thumbnail,
            'ext': video_ext,
            'age_limit': age_limit,
        }