var Promise = require('promise')
var DDG = require('node-ddg-api').DDG

module.exports = function (config) {
  var ddg = new DDG('kulmapaikka-ircbot')

  var getAnswer = function (queryText) {
    var promise = new Promise(function (resolve, reject) {
      ddg.instantAnswer(queryText, {skip_disambig: '0'}, function (error, response) {
        if (!error) {
          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(''))
          }
        } else {
          reject(new Error(''))
        }
      })
    })
    return promise
  }

  return getAnswer
}