var Alexa = require ('alexa-sdk');
const config = require ('../config/config');
var databaseHelper = require ('../helpers/database');

// Build the context manually, because Amazon Lambda is missing
var context = {
  succeed: function (result) {
    console.log (result);
    res.json (result);
  },
  fail: function (error) {
    console.log (error);
    //We could send error json from here
  },
};

var handlers = {};

module.exports = {
  run: function (req, res) {
    var alexa = Alexa.handler (req.body, context);
    alexa.appId = config.SKILL_ID;
    alexa.registerHandlers (handlers);
    alexa.execute ();
  },
  updateModel: function () {
    //Get info from database, and store it for faster response on intent
    databaseHelper
      .getSkill (config.SKILL_DB_ID)
      .then (activeSkill => {
        handlers = {};
        handlers = {
          LaunchRequest: function () {
            this.response.speak (activeSkill.invocationAnswer);
            this.emit (':responseReady');
          },
        };
        activeSkill.intents.map (intent => {
          handlers[intent.intentName] = function () {
            this.response.speak (intent.answer);
            this.emit (':responseReady');
          };
        });
      })
      .catch (e => {
        //Something is wrong, skill is not ready, use catch-all intent to inform user
        console.log ('Error. Skill doesnt exist');
      });
  },
};