var Promise = require('promise')
var requestPromise = require('./helpers/requestPromise.js')
var BasePlugin = require('./base.js')

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

  help () {
    //     | Command             | Description
    return '.wtf <termi>           Etsii vastauksen annetulle termille'
  }

  test (input) {
    if (input.match(/^\.wtf (.+)$/i)) {
      return true
    }
    return false
  }

  getDDG (query) {
    var urlArgs = {
      q: query,
      kp: -1,
      skip_disambig: '0',
      format: 'json'
    }

    let url = 'https://api.duckduckgo.com/'
    var promise = requestPromise(url, urlArgs, {
      'Accept': 'application/json'
    })

    return promise
  }

  getAnswer (query) {
    let that = this
    var promise = new Promise(function (resolve, reject) {
      that.getDDG(query).then((response) => {
        var str = ''
        if (response.AbstractText !== '') {
          var text = ''
          if (response.AbstractText.length > 350) {
            text = response.AbstractText.substring(0, 350 - response.AbstractURL.length) + '...'
          } else {
            text = response.AbstractText
          }

          str = 'Vastaus: ' + text + '" | ' + response.AbstractURL
          resolve(str)
        } else if (response.RelatedTopics.length > 0) {
          str = 'Vastaus: "' + response.RelatedTopics[0].Text + '" | ' + response.RelatedTopics[0].FirstURL
          resolve(str)
        } else {
          reject(new Error())
        }
      }, reject)
    })
    return promise
  }

  result (input) {
    let that = this
    var resultPromise = new Promise(function (resolve, reject) {
      var res = input.match(/^\.wtf (.+)$/i)
      if (res !== null) {
        let query = res[1]
        that.getAnswer(query).then(str => {
          resolve(str)
        })
      } else {
        reject(new Error())
      }
    })
    return resultPromise
  }
}

module.exports = InstantAswer