var logger = require('winston');
var http = require('http');
var channel;
var relay_controller;
var error_count_before_restart = 60;

var wifi_routers = [
  {
    title : "Satelite Link",
    status: "Unkown",
    url: "http://192.168.0.1/",
    device: "HT2000",
    errors: 0,
    restarted: false,
    code: "R01"
  },
  {
    title : "Main Router",
    status: "Unkown",
    url: "http://192.168.100.1/",
    device: "Wireless N 300M",
    errors: 0,
    restarted: false,
    code: "R02"
  },
  {
    title : "Repeater 1",
    status: "Unkown",
    url: "http://192.168.100.2/",
    device: "300M Wireless N Nano Router",
    errors: 0,
    restarted: false
  }
]

module.exports.start = function(relay_controller_config){
  relay_controller = relay_controller_config;
  logger.info("Starting wifi routers controller module");
  checkRouters()
  setInterval(function () {
    checkRouters()
  }, 60000);
}

module.exports.monitor = function(socket, channel_config){
  channel = channel_config;
  socket.on('wifi_routers_update', function (data) {
    socket.emit("wifi_routers", wifi_routers);
  });
}

module.exports.change_state = function(id, status){
  wifi_routers[id].status = status;
  channel.emit("wifi_routers", wifi_routers);
}

module.exports.check_status = function(id){
  checkURL(wifi_routers[id].url, id);
}

module.exports.send_status = function(){
  channel.emit("wifi_routers", wifi_routers);
}

var checkRouters = function(){
  logger.info("Checking WIFI Routers...");
  checkURL(wifi_routers[0].url, 0);
  checkURL(wifi_routers[1].url, 1);
  checkURL(wifi_routers[2].url, 2);
  setInterval(function () {
    checkRestart()
  }, 5000);
}

var checkURL = function(url, n){
  http.get(url, function (res) {
    wifi_routers[n].status = "Active"
    wifi_routers[n].errors = 0;
  }).on('error', function(e) {
    wifi_routers[n].status = "Inactive";
    wifi_routers[n].errors += 1;
    logger.info(wifi_routers[n].title + " is " + wifi_routers[n].status + " (" + wifi_routers[n].errors + " errors)");
  });;
}

var checkRestart = function() {
  for (var i = 0; i < wifi_routers.length; i++) {
    if(wifi_routers[i].errors > error_count_before_restart) {
      if(wifi_routers[i].restarted == false){
        if(wifi_routers[i].code != undefined){
          wifi_routers[i].restarted = true;
          relay_controller.switchRelay(wifi_routers[i].code, true)
        }
      }
    }
  }
}