var amazonHelper = require('./helpers/amazon');
var databaseHelper = require('./helpers/database');

const config = require('./config');

require('isomorphic-fetch');

var express = require('express');
var alexa = require('alexa-app');

var bodyParser = require('body-parser');

var MongoClient = require ('mongodb').MongoClient;
var ObjectID = require ('mongodb').ObjectID;

const router = express.Router ();

var skillID = 'amzn1.ask.skill.7115bfc9-313e-4728-830b-ebd19ce96cb3';
var skillDbID = '5a5016e775becaef2015da10'; //_id in database 

//***********/
//var express = require("express");
//var alexa = require("alexa-app");

var PORT = process.env.port || 5000;
var app = express();

// ALWAYS setup the alexa app and attach it to express before anything else.
var alexaApp = new alexa.app("step3");

alexaApp.express({
  expressApp: app,

  // verifies requests come from amazon alexa. Must be enabled for production.
  // You can disable this if you're running a dev environment and want to POST
  // things to test behavior. enabled by default.
  checkCert: false,

  // sets up a GET route when set to true. This is handy for testing in
  // development, but not recommended for production. disabled by default
  debug: true,

  preRequest: function(request,response){
    console.log('pre');
    const alexaRequest = new alexa.request(request);
    if (alexaRequest.type() === "IntentRequest") {
      db.collection('skill_list').findOne({_id: ObjectID(skillDbID)}, (err,skill)=>{
        if (skill) {
          console.log(alexaRequest.data.request.intent);
          let intentId = findElementByAttr(skill.intents, 'intentName', alexaRequest.data.request.intent.name);
          const response = new alexa.response(alexaRequest.getSession());
          if (intentId !== -1){
            return response.say(skill.intents[intentId].answer);
          }else{
            return response.say('Sorry, I could not find desired intent');
          }
        }
      });
    }
  }
});

// now POST calls to /test in express will be handled by the app.request() function

// from here on you can setup any other express routes or middlewares as normal
app.set("view engine", "ejs");

alexaApp.launch(function(request, response) {
  console.log('launch');
  response.say("You launched the app!");
});

//alexaApp.dictionary = { "names": ["matt", "joe", "bob", "bill", "mary", "jane", "dawn"] };

/*
alexaApp.intent("GetFirstQuestion", {
    "slots":[],
    "utterances": [
      "Tell me about your process", "Give me info about your process"
    ]
  },
  function(request, response) {
    console.log('My name');
    response.say("Success!");
  }
);
*/

var findElementByAttr = function (data, attr, val){
  for(var i = 0; i < data.length; i ++) {
    if(data[i][attr] === val) {
        return i;
    }
  }
  return -1;
}

/*
alexaApp.request = (jsonRequest) => {
/*
  const alexaRequest = new alexa.request(jsonRequest);
  if (alexaRequest.type() === "IntentRequest") {
    db.collection('skill_list').findOne({_id: ObjectID(skillDbID)}, (err,skill)=>{
      if (skill) {
        console.log(alexaRequest.data.request.intent);
        let intentId = findElementByAttr(skill.intents, 'intentName', alexaRequest.data.request.intent.name);
        const response = new alexa.response(alexaRequest.getSession());
        if (intentId !== -1){
          response.say(skill.intents[intentId].answer);
        }else{
          response.say('Sorry, I could not find desired intent');
        }
      }
    });
  }
};
*/


alexaApp.intent("SimpleIntent", {
    "slots": [],
    "utterances": ["Tell me somethin"]
  },
  function(request, response) {
    response.say("This is sample");
  }
);

//app.listen(PORT);
//console.log("Listening on port " + PORT + ", try http://localhost:" + PORT + "/test");

MongoClient.connect (config.dbURL).then (database => {
  db = database;
  db.collection ('intent_list');
  
  databaseHelper.initModule(db);
  
  app.listen (config.PORT, () =>{
    console.log ('Express server running on port ' + config.PORT);
    databaseHelper.loadTokens();
  });
}).catch(e=>{
  console.log("error : " + e);
})