var Promise = require('promise')
var BasePlugin = require('./base.js')
const logger = require('../logger')

class Youtube extends BasePlugin {
  constructor (config) {
    super(config)
    this.name = 'Youtube'
    this.config = config
  }

  test (input) {
    // Kernel version
    if (input.match(/https?:\/\/(?:www\.)?(?:(?:youtu\.be\/([\w-]+))|(?:(?:youtube\.com\/watch\?(?:[\w=#-]+&)*v=)([\w-]+)))/i)) {
      return true
    }
    return false
  }

  getYoutubeResult (id, resolve, reject) {
    if (typeof id !== 'undefined') {
      var googleapi = require('./helpers/googleapi.js')(this.config)
      googleapi.getYoutubeVideoById(id).then(function (result) {
        var resultString = 'Youtube: '
        resultString += result.title
        resultString += ', esittäjänä ' + result.channelTitle
        if (typeof result.statistics !== 'undefined') {
          var likeCount = Number(result.statistics.likeCount)
          resultString += ' (' + result.duration + ', ' + result.statistics.viewCount + ' katselukertaa, ' + likeCount + ' 👍)'
        }
        resolve(resultString)
      }, function (err) {
        logger.info('Error', err)
        reject('Youtube: jokin meni pieleen...')
      })
    } else {
      reject('Youtube: jokin meni pahasti pieleen...')
    }
  }

  result (input) {
    var that = this
    var resultPromise = new Promise(function (resolve, reject) {
      var res = input.match(/https?:\/\/(?:www\.)?(?:(?:youtu\.be\/([\w-]+)))/i)

      if (res !== null) {
        var id = res[1]

        that.getYoutubeResult(id, resolve, reject)
      } else {
        res = input.match(/https?:\/\/(?:www\.)?(?:(?:youtube\.com\/watch\?(?:[\w=#-]+&)*v=)([\w-]+))/i)

        if (res !== null) {
          that.getYoutubeResult(res[1], resolve, reject)
        } else {
          reject(new Error('Youtube: jokin meni pieleen (ei osunut)...'))
        }
      }
    })

    return resultPromise
  }
}

module.exports = Youtube