import re

from .common import InfoExtractor


class HowcastIE(InfoExtractor):
    _VALID_URL = r'(?:https?://)?(?:www\.)?howcast\.com/videos/(?P<id>\d+)'

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

        video_id = mobj.group('id')
        webpage_url = 'http://www.howcast.com/videos/' + video_id
        webpage = self._download_webpage(webpage_url, video_id)

        self.report_extraction(video_id)

        video_url = self._search_regex(r'\'?file\'?: "(http://mobile-media\.howcast\.com/[0-9]+\.mp4)',
            webpage, u'video URL')

        video_title = self._html_search_regex(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') property=\'og:title\'',
            webpage, u'title')

        video_description = self._html_search_regex(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') name=\'description\'',
            webpage, u'description', fatal=False)

        thumbnail = self._html_search_regex(r'<meta content=\'(.+?)\' property=\'og:image\'',
            webpage, u'thumbnail', fatal=False)

        return [{
            'id':       video_id,
            'url':      video_url,
            'ext':      'mp4',
            'title':    video_title,
            'description': video_description,
            'thumbnail': thumbnail,
        }]