var logger = require('winston');
var rpio = require("rpio")
var channel;
var wifi_routers;

var relay_status = [
  { code: "L01", status: false, pin: 35 }, // Light - plug 4
  { code: "R01", status: true, pin: 33 }, // Satelite Link router - plug 3
  { code: "R02", status: true, pin: 31 }, // Wifi Router - plug 2
  { code: "???", status: true, pin: 29 } // Unused - plug 1
]

module.exports.start = function(router, channel_config, wifi_routers_config){
  channel = channel_config;
  wifi_routers = wifi_routers_config;
  logger.info("Starting Relay controller module");
  rpio.open(relay_status[0].pin, rpio.OUTPUT, rpio.LOW);
  rpio.open(relay_status[1].pin, rpio.OUTPUT, rpio.HIGH);
  rpio.open(relay_status[2].pin, rpio.OUTPUT, rpio.HIGH);
  rpio.open(relay_status[3].pin, rpio.OUTPUT, rpio.HIGH);
  router.post('/switch_relay', function (req, res) {
    logger.info("Received request for switching relays", req.body);
    if(req.body != undefined){
      var relay = req.body;
      if(relay.code != undefined && relay.status != undefined){
        switchRelay(relay.code, relay.status);
      }
    }
    res.sendStatus(200);
  });

}

module.exports.monitor = function(socket, channel){
  socket.on('relay_switch_update', function (data) {
    logger.info("relay_switch_update", data);
    socket.emit("relay_switch", relay_status[0]);
  });
}



var switchRelay = function(code, status){
  switch (code) {
    case "L01":
      relay_L01(status)
      break;
    case "R01":
      relay_restart(code, 30000, 0, 1)
      break;
    case "R02":
      relay_restart(code, 5000, 1, 2)
      break;
    default:

  }
}

var relay_L01 = function(status){
  // switch on light relay
  if(status == true) {
    rpio.write(relay_status[0].pin, rpio.HIGH);
    logger.info("Switched L01 ON");
  } else {
    rpio.write(relay_status[0].pin, rpio.LOW);
    logger.info("Switched L01 OFF");
  }
  relay_status[0].status = status;
  channel.emit('relay_switch', { code: "L01", status: status });
}

var relay_restart = function(code, time, wifi_id, relay_id){
  // Restart router
  channel.emit('relay_switch', { code: code, status: false });
  wifi_routers.change_state(wifi_id, "Restarting");
  logger.info("Switched " + code + " OFF");
  relay_status[relay_id].status = false;
  rpio.write(relay_status[relay_id].pin, rpio.LOW);
  setTimeout(function () {
    channel.emit('relay_switch', { code: code, status: true });
    logger.info("Switched " + code + " ON");
    relay_status[relay_id].status = true;
    rpio.write(relay_status[relay_id].pin, rpio.HIGH);
    setTimeout(function () {
      wifi_routers.check_status(wifi_id);
      setTimeout(function () {
        wifi_routers.send_status();
      }, 3000);
    }, 15000);
  }, time);
}

module.exports.switchRelay = switchRelay