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from __future__ import unicode_literals

import datetime
import json
import re
import socket

from .common import InfoExtractor
from ..utils import (
    compat_http_client,
    compat_str,
    compat_urllib_error,
    compat_urllib_request,

    ExtractorError,
    unescapeHTML,
)


class BlipTVIE(InfoExtractor):
    """Information extractor for blip.tv"""

    _VALID_URL = r'^(?:https?://)?(?:\w+\.)?blip\.tv/((.+/)|(play/)|(api\.swf#))(.+)$'

    _TESTS = [{
        'url': 'http://blip.tv/cbr/cbr-exclusive-gotham-city-imposters-bats-vs-jokerz-short-3-5796352',
        'md5': 'c6934ad0b6acf2bd920720ec888eb812',
        'info_dict': {
            'id': '5779306',
            'ext': 'mov',
            'upload_date': '20111205',
            'description': 'md5:9bc31f227219cde65e47eeec8d2dc596',
            'uploader': 'Comic Book Resources - CBR TV',
            'title': 'CBR EXCLUSIVE: "Gotham City Imposters" Bats VS Jokerz Short 3',
        }
    }, {
        # With subtitles (ignored) #2274
        'url': 'http://blip.tv/play/h6Uag5OEVgI.html',
        'md5': '309f9d25b820b086ca163ffac8031806',
        'info_dict': {
            "id": "6586561",
            "ext": "mp4",
            "upload_date": "20130614",
            "uploader": "Red vs. Blue",
            "title": "Red vs. Blue Season 11 Episode 1",
            "description": "One-Zero-One"
        }
    }]

    def report_direct_download(self, title):
        """Report information extraction."""
        self.to_screen('%s: Direct download detected' % title)

    def _real_extract(self, url):
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            raise ExtractorError('Invalid URL: %s' % url)

        # See https://github.com/rg3/youtube-dl/issues/857
        embed_mobj = re.search(r'^(?:https?://)?(?:\w+\.)?blip\.tv/(?:play/|api\.swf#)([a-zA-Z0-9]+)', url)
        if embed_mobj:
            info_url = 'http://blip.tv/play/%s.x?p=1' % embed_mobj.group(1)
            info_page = self._download_webpage(info_url, embed_mobj.group(1))
            video_id = self._search_regex(r'data-episode-id="(\d+)', info_page,  'video_id')
            return self.url_result('http://blip.tv/a/a-' + video_id, 'BlipTV')

        if '?' in url:
            cchar = '&'
        else:
            cchar = '?'
        json_url = url + cchar + 'skin=json&version=2&no_wrap=1'
        request = compat_urllib_request.Request(json_url)
        request.add_header('User-Agent', 'iTunes/10.6.1')
        self.report_extraction(mobj.group(1))
        urlh = self._request_webpage(request, None, False,
            'unable to download video info webpage')

        try:
            json_code_bytes = urlh.read()
            json_code = json_code_bytes.decode('utf-8')
        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
            raise ExtractorError('Unable to read video info webpage: %s' % compat_str(err))

        try:
            json_data = json.loads(json_code)
            if 'Post' in json_data:
                data = json_data['Post']
            else:
                data = json_data

            upload_date = datetime.datetime.strptime(data['datestamp'], '%m-%d-%y %H:%M%p').strftime('%Y%m%d')
            formats = []
            if 'additionalMedia' in data:
                for f in sorted(data['additionalMedia'], key=lambda f: int(0 if f['media_height'] is None else f['media_height'])):
                    if not int(0 if f['media_height'] is None else f['media_height']): # filter out m3u8 and srt files
                        continue
                    formats.append({
                        'url': f['url'],
                        'format_id': f['role'],
                        'width': int(f['media_width']),
                        'height': int(f['media_height']),
                    })
            else:
                formats.append({
                    'url': data['media']['url'],
                    'width': int(data['media']['width']),
                    'height': int(data['media']['height']),
                })

            self._sort_formats(formats)

            return {
                'id': compat_str(data['item_id']),
                'uploader': data['display_name'],
                'upload_date': upload_date,
                'title': data['title'],
                'thumbnail': data['thumbnailUrl'],
                'description': data['description'],
                'user_agent': 'iTunes/10.6.1',
                'formats': formats,
            }
        except (ValueError, KeyError) as err:
            raise ExtractorError('Unable to parse video information: %s' % repr(err))


class BlipTVUserIE(InfoExtractor):
    """Information Extractor for blip.tv users."""

    _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?blip\.tv/)|bliptvuser:)([^/]+)/*$'
    _PAGE_SIZE = 12
    IE_NAME = 'blip.tv:user'

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

        username = mobj.group(1)

        page_base = 'http://m.blip.tv/pr/show_get_full_episode_list?users_id=%s&lite=0&esi=1'

        page = self._download_webpage(url, username, 'Downloading user page')
        mobj = re.search(r'data-users-id="([^"]+)"', page)
        page_base = page_base % mobj.group(1)


        # Download video ids using BlipTV Ajax calls. Result size per
        # query is limited (currently to 12 videos) so we need to query
        # page by page until there are no video ids - it means we got
        # all of them.

        video_ids = []
        pagenum = 1

        while True:
            url = page_base + "&page=" + str(pagenum)
            page = self._download_webpage(url, username,
                                          'Downloading video ids from page %d' % pagenum)

            # Extract video identifiers
            ids_in_page = []

            for mobj in re.finditer(r'href="/([^"]+)"', page):
                if mobj.group(1) not in ids_in_page:
                    ids_in_page.append(unescapeHTML(mobj.group(1)))

            video_ids.extend(ids_in_page)

            # A little optimization - if current page is not
            # "full", ie. does not contain PAGE_SIZE video ids then
            # we can assume that this page is the last one - there
            # are no more ids on further pages - no need to query
            # again.

            if len(ids_in_page) < self._PAGE_SIZE:
                break

            pagenum += 1

        urls = ['http://blip.tv/%s' % video_id for video_id in video_ids]
        url_entries = [self.url_result(vurl, 'BlipTV') for vurl in urls]
        return [self.playlist_result(url_entries, playlist_title = username)]