const em = require('events').EventEmitter;
const util = require('util');
const logger = require('log4js').getLogger('BedroomRecipe');
logger.level = 'debug';

const BedroomRecipe = function(devices) {
  const _this = this;
  this.mqtt = devices.mqtt;
  this.wemo = devices.wemo;

  this.globalMode = 'FanOff';

  this.bedroom = {
    'temp': 0,
    'last': 0,
    'data': []
  };
  this.ranges = {
    'day': { 'low': 20.2, 'high': 22.0, 'max': 22.7 },
    'night': { 'low': 20.2, 'high': 22.0, 'max': 22.7 }
  };

  logger.debug('Setting up bedroom recipe');

  this.fanTimer = function() {
    let n;

    const onTime = 900000;
    const now = new Date;
    const mod = onTime - (now.getTime() % onTime);
    const day = now.getDay();
    const daytimeLimits = { 'low': 27900000, 'high': 63000000 };
    const nowMS = (now.getHours() * 3600000) + (now.getMinutes() * 60000);
    const curRange = (nowMS < 25200000) ? this.ranges.night : this.ranges.day;

    if (this.globalMode === 'FanOff') {
      logger.info(`Fans off, temp should be  <= ${curRange.low}`);
      mode = (parseFloat(this.bedroom.temp) <= curRange.low) ? 'FanOn' : 'FanOff';
    }
    else {
      logger.info(`Fans on, temp should not be less than ${curRange.high}`);
      mode = (parseFloat(this.bedroom.temp) <= curRange.high) ? 'FanOn' : 'FanOff';
    }

    if ((this.globalMode !== 'FanOff' || mode !== 'FanOff') && ((day >= 1 && day <= 5) && (nowMS >= daytimeLimits.low && nowMS <= daytimeLimits.high))) {
      logger.info('Week day');
      mode = 'FanOff';
    }

    n = now.getTime() - this.lastMsg;
    logger.info('Last msg', n);

    if (n >= 600000) {
      logger.error('No message received for over 10 minutes');
      mode = 'FanOff';
      logger.warn('Setting quit for 15 seconds.');
      setTimeout(() => {
        throw new error('Ejecting for restart');
      }, 15000);
    }

    logger.info('LR temp:', this.bedroom.temp);
    // const data = { 'id': 'temperature', 'data': { 'mode': this.globalMode, 'temp': this.bedroom.temp } };

    logger.debug('Mode', mode);
    if (this.bedroom.temp !== 0) {
      logger.debug('trying to turn fann off');
      _this.wemo.emit('wemo', mode);
    }

    setTimeout(this.fanTimer.bind(this), mod + 500);
  };

  const updateTemp = (temp) => {
    const now = new Date;
    const nowMS = (now.getHours() * 3600000) + (now.getMinutes() * 60000);
    const curRange = (nowMS < 25200000) ? this.ranges.night : this.ranges.day;

    this.bedroom.temp = parseFloat(temp);
    logger.info(this.bedroom.temp, this.bedroom.temp >= curRange.max);

    if (this.bedroom.temp >= curRange.max) {
      logger.warn('Max temp reached, turn off');
      _this.wemo.emit('wemo', 'fanOff');
    }
  };

  this.mqtt.on('bedroomTemp', (d) => {
    updateTemp(d);
  });

  setTimeout(this.fanTimer.bind(this), 10000);
};

util.inherits(BedroomRecipe, em);

module.exports = { BedroomRecipe };