from __future__ import unicode_literals

from .common import InfoExtractor
from ..utils import (
    smuggle_url,
    url_basename,
)


class NationalGeographicIE(InfoExtractor):
    _VALID_URL = r'https?://video\.nationalgeographic\.com/.*?'

    _TESTS = [
        {
            'url': 'http://video.nationalgeographic.com/video/news/150210-news-crab-mating-vin?source=featuredvideo',
            'info_dict': {
                'id': '4DmDACA6Qtk_',
                'ext': 'flv',
                'title': 'Mating Crabs Busted by Sharks',
                'description': 'md5:16f25aeffdeba55aaa8ec37e093ad8b3',
            },
            'add_ie': ['ThePlatform'],
        },
        {
            'url': 'http://video.nationalgeographic.com/wild/when-sharks-attack/the-real-jaws',
            'info_dict': {
                'id': '_JeBD_D7PlS5',
                'ext': 'flv',
                'title': 'The Real Jaws',
                'description': 'md5:8d3e09d9d53a85cd397b4b21b2c77be6',
            },
            'add_ie': ['ThePlatform'],
        },
    ]

    def _real_extract(self, url):
        name = url_basename(url)

        webpage = self._download_webpage(url, name)
        feed_url = self._search_regex(
            r'data-feed-url="([^"]+)"', webpage, 'feed url')
        guid = self._search_regex(
            r'id="(?:videoPlayer|player-container)"[^>]+data-guid="([^"]+)"',
            webpage, 'guid')

        feed = self._download_xml('%s?byGuid=%s' % (feed_url, guid), name)
        content = feed.find('.//{http://search.yahoo.com/mrss/}content')
        theplatform_id = url_basename(content.attrib.get('url'))

        return self.url_result(smuggle_url(
            'http://link.theplatform.com/s/ngs/%s?formats=MPEG4&manifest=f4m' % theplatform_id,
            # For some reason, the normal links don't work and we must force
            # the use of f4m
            {'force_smil_url': True}))
