# -*- coding: utf-8 -*-

import re
import urlparse

from module.common.json_layer import json_loads
from module.plugins.internal.Crypter import Crypter
from module.utils import save_join as fs_join


class YoutubeComFolder(Crypter):
    __name__    = "YoutubeComFolder"
    __type__    = "crypter"
    __version__ = "1.03"

    __pattern__ = r'https?://(?:www\.|m\.)?youtube\.com/(?P<TYPE>user|playlist|view_play_list)(/|.*?[?&](?:list|p)=)(?P<ID>[\w-]+)'
    __config__  = [("use_subfolder"     , "bool", "Save package to subfolder"          , True ),
                   ("subfolder_per_pack", "bool", "Create a subfolder for each package", True ),
                   ("likes"             , "bool", "Grab user (channel) liked videos"   , False),
                   ("favorites"         , "bool", "Grab user (channel) favorite videos", False),
                   ("uploads"           , "bool", "Grab channel unplaylisted videos"   , True )]

    __description__ = """Youtube.com channel & playlist decrypter plugin"""
    __license__     = "GPLv3"
    __authors__     = [("Walter Purcaro", "vuolter@gmail.com")]


    API_KEY = "AIzaSyCKnWLNlkX-L4oD1aEzqqhRw1zczeD6_k0"


    def api_response(self, ref, req):
        req.update({"key": self.API_KEY})
        url  = urlparse.urljoin("https://www.googleapis.com/youtube/v3/", ref)
        html = self.load(url, get=req)
        return json_loads(html)


    def get_channel(self, user):
        channels = self.api_response("channels", {"part": "id,snippet,contentDetails", "forUsername": user, "maxResults": "50"})
        if channels['items']:
            channel = channels['items'][0]
            return {"id": channel['id'],
                    "title": channel['snippet']['title'],
                    "relatedPlaylists": channel['contentDetails']['relatedPlaylists'],
                    "user": user}  #: One lone channel for user?


    def get_playlist(self, p_id):
        playlists = self.api_response("playlists", {"part": "snippet", "id": p_id})
        if playlists['items']:
            playlist = playlists['items'][0]
            return {"id": p_id,
                    "title": playlist['snippet']['title'],
                    "channelId": playlist['snippet']['channelId'],
                    "channelTitle": playlist['snippet']['channelTitle']}


    def _get_playlists(self, id, token=None):
        req = {"part": "id", "maxResults": "50", "channelId": id}
        if token:
            req.update({"pageToken": token})

        playlists = self.api_response("playlists", req)

        for playlist in playlists['items']:
            yield playlist['id']

        if "nextPageToken" in playlists:
            for item in self._get_playlists(id, playlists['nextPageToken']):
                yield item


    def get_playlists(self, ch_id):
        return map(self.get_playlist, self._get_playlists(ch_id))


    def _get_videos_id(self, id, token=None):
        req = {"part": "contentDetails", "maxResults": "50", "playlistId": id}
        if token:
            req.update({"pageToken": token})

        playlist = self.api_response("playlistItems", req)

        for item in playlist['items']:
            yield item['contentDetails']['videoId']

        if "nextPageToken" in playlist:
            for item in self._get_videos_id(id, playlist['nextPageToken']):
                yield item


    def get_videos_id(self, p_id):
        return list(self._get_videos_id(p_id))


    def decrypt(self, pyfile):
        m = re.match(self.__pattern__, pyfile.url)
        m_id = m.group('ID')
        m_type = m.group('TYPE')

        if m_type == "user":
            self.log_debug("Url recognized as Channel")
            user = m_id
            channel = self.get_channel(user)

            if channel:
                playlists = self.get_playlists(channel['id'])
                self.log_debug("%s playlist\s found on channel \"%s\"" % (len(playlists), channel['title']))

                relatedplaylist = {p_name: self.get_playlist(p_id) for p_name, p_id in channel['relatedPlaylists'].iteritems()}
                self.log_debug("Channel's related playlists found = %s" % relatedplaylist.keys())

                relatedplaylist['uploads']['title'] = "Unplaylisted videos"
                relatedplaylist['uploads']['checkDups'] = True  #: checkDups flag

                for p_name, p_data in relatedplaylist.iteritems():
                    if self.get_config(p_name):
                        p_data['title'] += " of " + user
                        playlists.append(p_data)
            else:
                playlists = []
        else:
            self.log_debug("Url recognized as Playlist")
            playlists = [self.get_playlist(m_id)]

        if not playlists:
            self.fail(_("No playlist available"))

        addedvideos = []
        urlize = lambda x: "https://www.youtube.com/watch?v=" + x
        for p in playlists:
            p_name = p['title']
            p_videos = self.get_videos_id(p['id'])
            p_folder = fs_join(self.core.config.get("general", "download_folder"), p['channelTitle'], p_name)
            self.log_debug("%s video\s found on playlist \"%s\"" % (len(p_videos), p_name))

            if not p_videos:
                continue
            elif "checkDups" in p:
                p_urls = [urlize(v_id) for v_id in p_videos if v_id not in addedvideos]
                self.log_debug("%s video\s available on playlist \"%s\" after duplicates cleanup" % (len(p_urls), p_name))
            else:
                p_urls = map(urlize, p_videos)

            self.packages.append((p_name, p_urls, p_folder))  #: Folder is NOT recognized by pyload 0.4.9!

            addedvideos.extend(p_videos)