const Promise = require('promise')
const {google} = require('googleapis')
const youtube = google.youtube('v3')
const logger = require('../../logger')

module.exports = function (config) {
  'use strict'
  var apikey = config.keys.google.apiKey
  return {
    getYoutubeVideoById: function (videoId) {
      return 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) {
          if (err !== null) {
            logger.error(err)
            thisReject(new Error('Google error'))
            return
          }
          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)
        })
      })
    },
    getYoutubeVideo: function (query) {
      var params = {
        part: 'snippet',
        q: query,
        type: 'video',
        order: 'viewCount',
        key: apikey
      }
      logger.debug(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(new Error('No results (null)'))
            return
          }

          if (resp.items.length <= 0) {
            reject(new Error('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(new Error('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
    }
  }
}