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

class InstantAswer extends BasePlugin {
  constructor(config) {
    super(config);
    this.name = 'InstantAswer';
  }
  test(input) {
    var res = null;
    if (res = 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();
        }
      }, reject);
    });
    return promise;
  }

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

  }
}

module.exports = InstantAswer;