const Promise = require('promise');
const requestPromise = require('./requestPromise.js');
const {google} = require('googleapis');
const youtube = google.youtube('v3');
const apis = google.getSupportedAPIs();
module.exports = function(config) {
  'use strict';
  var apikey = config.keys.google.apiKey;
  return {
    getYoutubeVideoById: function(videoId) {
      var promise = new Promise(function(resolve, reject) {
        var videosParams = {
          part: 'snippet,contentDetails,statistics',
          id: videoId,
          key: apikey
        };

        var thisResolve = resolve;
        var thisReject = reject;
        youtube.videos.list(videosParams, function(err, response) {
          let resp = response.data;
          if(typeof resp === 'undefined' || resp === null || typeof resp.items === 'undefined' || resp.items === null || resp.items.length <= 0) {
            thisReject('No results');
            return;
          }

          var duration = resp.items[0].contentDetails.duration;
          var formattedTime = duration.replace("PT","").replace("H","t ").replace("M","m ").replace("S","s");
          var data = {
            videoId: videoId,
            url: 'https://youtu.be/'+videoId,
            title: resp.items[0].snippet.title,
            channelTitle: resp.items[0].snippet.channelTitle,
            statistics: resp.items[0].statistics,
            duration: formattedTime
          };
          thisResolve(data);
        });
      });
      return promise;
    },
    getYoutubeVideo: function(query) {

      var params = {
        part: 'snippet',
        q: query,
        type: 'video',
        order: 'viewCount',
        key: apikey
      };
      console.log(params);
      var promise = new Promise(function(resolve, reject) {
        youtube.search.list(params,  function(err, resp) {
          if (err) {
            console.log('An error occured', err);
            reject(err);
          }

          if(resp === null || resp.items === null) {
            reject('No results (null)');
            return;
          }

          if(resp.items.length <= 0) {
            reject('No results');
            return;
          }

          var videoId = resp.items[0].id.videoId;
          var data = {
            videoId: videoId,
            url: 'https://youtu.be/'+videoId,
            title: resp.items[0].snippet.title,
            channelTitle: resp.items[0].snippet.channelTitle
          };


          var videosParams = {
            part: 'snippet,contentDetails,statistics',
            id: videoId,
            key: apikey
          };
          youtube.videos.list(videosParams, function(err2, resp2) {
            //console.log('respo', resp2);
            if(resp2.items.length <= 0) {
              reject('No results');
              return;
            }
            data.statistics = resp2.items[0].statistics;
            var duration = resp2.items[0].contentDetails.duration;
            var formattedTime = duration.replace("PT","").replace("H","t ").replace("M","m ").replace("S","s");
            data.duration = formattedTime;
            resolve(data);
          });
        });
      });

      return promise;
    }
  };
};