var mqtt = require('mqtt');
var request = require('request');
var util = require('util');
var logger = require('log4js').getLogger();

var EventEmitter = require('events');

//var nano = require('nano')('http://martind2000:1V3D4m526i@localhost:5984');
var nano = require('nano')('http://localhost:5984');
var busEmitter = new EventEmitter();

var db_name = 'mdot';
var dbCouch = nano.use(db_name);

var db = require('../server/db-connector').dbConnection;

var dbSave = require('../server/db-save')(db);



function dataBuilder(obj) {
  'use strict';
  var now = new Date();
  var newObj = {device_type: 'mDot', evt_type: 'update', timestamp: {}, evt: {}};

  newObj.device_id = obj.topic.split('/')[4];

  newObj.evt = obj;
  newObj.timestamp['$date'] = now.getTime();

  return newObj;
}

function insertEntry(obj) {

  var newObj = dataBuilder(obj);

  newObj.rtype = 1;

  logger.debug('Inserting into couch...');
 // logger.info(util.inspect(newObj));
  dbCouch.insert(newObj, function(err, body, header) {
    if (err) {
      logger.error('Error inserting into couch');
      return;
    }
  });
  logger.debug('Insert done..');
}

var doInsertEntry = (obj) => {
  //   Logger.info('sendSocket: ' + JSON.stringify(obj));

 // insertEntry(obj);

  dbSave.addNewEvent(obj)
    .then(function(d) {
      'use strict';
      logger.info('Finished - Raw',d);
    })
    .catch(function(e) {
      'use strict';
      logger.error(e);
    });


  dbSave.addProcessedEvent(obj)
    .then(function(d) {
          'use strict';
          logger.info('Finished - Processed',d);
        })
        .catch(function(e) {
          'use strict';
          logger.error(e);
        });
};


var mqttClient = function() {

    var subscribeTopic;
    var orgId = 'qz0da4';
    var userName = 'a-qz0da4-dfwwdkmkzr';
    var address = '.messaging.internetofthings.ibmcloud.com';
    var appKey = '9txJEf3Cjy7hkSOvkv';
    var prefix = 'iot-2/type/mDot/id/';
    var deviceId = ['CENSIS-LoRa-1','CENSIS-LoRa-2','CENSIS-LoRa-3','CENSIS-LoRa-4','HIE-mobile-1','HIE-mobile-2','HIE-smart-campus-1','HIE-smart-campus-2','HIE-smart-campus-3','HIE-smart-campus-4','HIE-smart-campus-5','HIE-smart-campus-6','HIE-smart-campus-7','HIE-mDot-1'];


    //Var subscribeTopic = prefix + deviceId + '/evt/+/fmt/json';


    this.connected = false;

    var options = {
        keepalive: 3600,
        clientId: 'a:' + orgId + ':' + Date.now(),
        username: userName,
        password: new Buffer(appKey)

      };

    this.client = mqtt.connect('mqtt://' + orgId + address, options);

    this.client.on('connect', function() {
        connected = true;
        logger.info('Connected to ', address);
      }.bind(this));


    for (var t = 0;t < deviceId.length;t++) {
      subscribeTopic = prefix + deviceId[t] + '/evt/+/fmt/json';
      logger.info('Subscribing:', subscribeTopic);
      this.client.subscribe(subscribeTopic);
    }



    this.client.on('message', function(topic, message) {
      console.log('onMessage',topic);

      var json = JSON.parse(message.toString());

      json.topic = topic;
     // logger.debug(JSON.stringify(json));

      busEmitter.emit('saveData', json);

    }.bind(this));

    this.isConnected = function() {

        return this.connected;
      };

    this.client.on('connected', function() {
                  logger.debug('mqttConnect - doConnection - Connected');

                });
    this.client.on('disconnect', function(e) {
      logger.error('mqttConnect - doConnection - disconnect');
      logger.error(e);
    });
    this.client.on('error', function(e) {
      logger.error('mqttConnect - doConnection - disconnect');
      logger.error(e);
    });


    busEmitter.on('saveData', doInsertEntry);


  };



module.exports.mqttClient = mqttClient;