exports.id = 'modbus_citysys';
exports.title = 'Modbus_citysys';
exports.version = '1.0.0';
exports.group = 'Worksys';
exports.color = '#2134B0';
exports.input = 1;
exports.output = ["red", "white", "blue", "orange"];
exports.click = false;
exports.author = 'Jakub Klena';
exports.icon = 'bolt';
exports.options = { edge: "undefined" };

exports.html = `<div class="padding">
	<div class="row">
		<div class="col-md-6">
			<div data-jc="textbox" data-jc-path="edge" data-jc-config="placeholder:undefined;required:true" class="m">Edge TB Name</div>
		</div>
	</div>
</div>`;

exports.readme = `# Energomonitor
## Outputs

 - *Red* - ERROR output (can connect to filewriter or something)
 - *White* - STATUS output (answers to your commands, ERRORS and WARNINGS from your commands go both to this and to their own outputs, so they get logged)
 - *Blue* - TB output (pure data for TB)
`;


const instanceSendTo = {
  error: 0,
  debug: 1,
  tb: 2,
  di_do_controller: 3
}

const DataToTbHandler = require('./helper/DataToTbHandler.js');
const { sendNotification } = require('./helper/notification_reporter.js');
const dbRelays = TABLE("relays");
const { promisifyBuilder, makeMapFromDbResult } = require('./helper/db_helper.js');
let tbname;

async function loadSettings()
{
  //todo global FLOW.OMS_edgeName is making problem, so we load it here as well, it should not be  
  let responseRelays = await promisifyBuilder(dbRelays.find());
  FLOW.OMS_edgeName = responseRelays[0]["tbname"];
  tbname = FLOW.OMS_edgeName;
} 

loadSettings();

exports.install = function(instance) {
  const SerialPort = require('serialport');
  const { exec } = require('child_process');
  const fs = require("fs");
  const filepath = F.path.root("saved_data/modbus_settings");
  const backup_filepath = F.path.root("saved_data/modbus_settings_backup");

  const ErrorToServiceHandler = require('./helper/ErrorToServiceHandler.js');
  const errorHandler = new ErrorToServiceHandler();

  let receivedDataArray = [];


  instance.CONFIG = {
    "isRunning": false,
    "debug": true,
    "timeoutTime": 10000,
    "msgWaitTime": 1000,
    "port": "/dev/ttymxc1",
    //"port_options": "stty -F /dev/ttymxc1 115200 min 1 time 5 ignbrk -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke"
    "port_options": "stty -F /dev/ttymxc1 9600 min 1 time 5 ignbrk -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke"
  };

  let PRIVATEVARS = {
    "errBuffer": [],        // Buffer for error messages
    "tbBuffer": [],          // Buffer for TB push messages
    "device_index": 0,
    "cmd_index": -1,
    "devices": [
      /*{
        "name": "Elektrometer 1",
        "tb_name": "EOzNMgZ9n43qPbjXmy7zwdA2DKdYvW5e6pxGRrVa",
        "type": "EM111",
        "address": 1,
        "data":[],
        "cmd":[],
        "timeoutcount":0,
        "status":"virtual"
      },*/
      // {
      //   "name": "Elektrometer 2",
      //   "tb_name": "pJX1ObgmqGZ54DMyYL7aDdkEVdve38WKRzwjNrQ9",
      //   "type": "EM111",
      //   "address": 2,
      //   "data":[],
      //   "cmd":[],
      //   "timeoutcount":0,
      //   "status":"virtual"
      // },
      // {
      //   "name": "Elektrometer 3",
      //   "tb_name": "XRvmwNz8QPblKp41GD7lKVkJrLVYoBO92dMegn6W",
      //   "type": "EM111",
      //   "address": 3,
      //   "data":[],
      //   "cmd":[],
      //   "timeoutcount":0,
      //   "status":"virtual"
      // },
      // {
      //   "name": "Elektrometer 4",
      //   "tb_name": "oRO8rjaBDy21qPQJzW7oD9ApK3xmNleVZg9Ed4Gw",
      //   "type": "EM111",
      //   "address": 4,
      //   "data":[],
      //   "cmd":[],
      //   "timeoutcount":0,
      //   "status":"virtual"
      // },
      {
        "name": "Elektrometer 1",
        "tb_name": "KjbN4q7JPZmexgdnz2yKQ98YAWwO0Q3BMX6ERLoV",
        "type": "EM340",
        "address": 1,
        "data":[],
        "cmd":[],
        "timeoutcount":0,
        "status":"virtual"
      }
    ],
    "cmd_tables": [
      {
        "type":"EM340",
        "cmd":[
          {
            "name": "Voltage L1",
            "tb_name": "a",
            "register": 0,
            "size": 2,
            "multiplier": 0.1
          },
          {
            "name": "Voltage L2",
            "tb_name": "b",
            "register": 2,
            "size": 2,
            "multiplier": 0.1
          },
          {
            "name": "Voltage L3",
            "tb_name": "c",
            "register": 4,
            "size": 2,
            "multiplier": 0.1
          },
          {
            "name": "Current L1",
            "tb_name": "d",
            "register": 12,
            "size": 2,
            "multiplier": 0.001
          },          
          {
            "name": "Current L2",
            "tb_name": "e",
            "register": 14,
            "size": 2,
            "multiplier": 0.001
          },          
          {
            "name": "Current L3",
            "tb_name": "f",
            "register": 16,
            "size": 2,
            "multiplier": 0.001
          }


          // {
          //   "name": "Power factor",
          //   "tb_name": "power_factor",
          //   "register": 14,
          //   "size": 1,
          //   "multiplier": 0.001
          // },
          // {
          //   "name": "Frequency",
          //   "tb_name": "frequency",
          //   "register": 15,
          //   "size": 1,
          //   "multiplier": 0.1
          // },
          // {
          //   "name": "Energy",
          //   "tb_name": "consumption",
          //   "register": 16,
          //   "size": 2,
          //   "multiplier": 0.1
          // }
        ]
      }
    ]
  };

  let ERRWEIGHT = {
    EMERGENCY: "emergency", // System unusable
    ALERT: "alert",         // Action must be taken immidiately
    CRITICAL: "critical",   // Component unable to function
    ERROR: "error",         // Error, but component able to recover from it
    WARNING: "warning",     // Possibility of error, system running futher
    NOTICE: "notice",       // Significant message but not an error, things user might want to know about
    INFO: "informational",  // Info
    DEBUG: "debug"          // Debug - only if CONFIG.debug is enabled
  };

  instance.currentData = function(){
    let resp = [];
    for (let f = 0; f < PRIVATEVARS.devices.length; f++){
      let dev = PRIVATEVARS.devices[f];
      for (let e = 0; e < dev.data.length; e++){
        let d = dev.data[e];
        resp.push({
          "name": dev.name+" - "+d.name,
          "value": d.value
        });
      }
    }
    return resp;
  };

  instance.configList = function(){
    let resp = [];
    /*let data = PRIVATEVARS.feeds;
    for (let a = 0; a < data.length; a++){
      for (let i = 0; i < instance.CONFIG.feeds.length; i++){
        let feed = instance.CONFIG.feeds[i];
        if (feed.name === data[a].id){
          for (let b = 0; b < data[a].streams.length; b++){
            for (let j = 0; j < feed.streams.length; j++){
              let stream = feed.streams[j];
              if (stream.name === data[a].streams[b].id){
                data[a].streams[b]["exists"] = true;
                data[a].streams[b]["currently"] = stream;
              }
            }
          }
        }
      }
    }
    resp.push({
      "name":"Device manager",
      "icon":"tasks",
      "_show":false,
      "js_func":"energoDevManager",
      "data": data
    });*/

    return resp;
  }

  let timeoutInterval = null;
  let msgWaitInterval = null;
  let port = null;
  let myEdge = "undefined";
  let starter = null;
  instance.status("Loading...", "red");
  

  instance.availableCommands = [
    {
      "name": "Status",
      "cmd": "qStatus",
      "icon": "stream",
      "func": function(body){
        let a = true;
        if (timeoutInterval === null){
          a = false;
        }
        let b = true;
        if (msgWaitInterval === null){
          b = false;
        }
        let st = {
          "isRunning":instance.CONFIG.isRunning,
          "timeoutInterval":a,
          "msgWaitInterval":b,
          "CONFIG":instance.CONFIG
        };
        return {
          "type": "ok",
          "timestamp": humanReadableTimeAndDate(),
          "resp": st
        };
      }
    },
    {
      "name": "Start Reading",
      "cmd": "sStart",
      "icon": "play",
      "func": function(body){
        /*if (running === false){
          startCmdWaitInterval();
          running = true;
          return "Reading started !";
        } else {
          return "Reading already active !";
        }*/
        return {
          "type": "ok",
          "timestamp": humanReadableTimeAndDate(),
          "resp": "WIP"
        };
      }
    },
    {
      "name": "Stop Reading",
      "cmd": "sStop",
      "icon": "stop",
      "func": function(body){
        /*if (running === true){
          stopCmdWaitInterval();
          stopTimeoutInterval();
          running = false;
          return "Reading stopped !";
        } else {
          return "Reading already inactive !";
        }*/
        return {
          "type": "ok",
          "timestamp": humanReadableTimeAndDate(),
          "resp": "WIP"
        };
      }
    },
    {
      "name": "Read current data",
      "cmd": "qCurrentData",
      "icon": "chart-bar",
      "func": function(body){
        let resp = instance.currentData();
        return {
          "type": "ok",
          "timestamp": humanReadableTimeAndDate(),
          "resp": resp
        };
      }
    },
    {
      "name": "Save current config",
      "cmd": "saveConfig",
      "icon": "save",
      "func": function(body){

        instance.set("config", JSON.stringify(instance.CONFIG));
        instance.set("private", JSON.stringify(PRIVATEVARS));
        return {
          "type": "ok",
          "timestamp": humanReadableTimeAndDate(),
          "resp": "done"
        };
      }
    },
    {
      "name": "Toggle debug",
      "cmd": "sDebug",
      "icon": "comment-dots",
      "func": function(body){

        if (instance.CONFIG.debug){
          instance.CONFIG.debug = false;
          instance.set("config", JSON.stringify(instance.CONFIG));

          return {
            "type": "ok",
            "timestamp": humanReadableTimeAndDate(),
            "resp": "debug OFF"
          };
        } else {
          instance.CONFIG.debug = true;
          instance.set("config", JSON.stringify(instance.CONFIG));

          return {
            "type": "ok",
            "timestamp": humanReadableTimeAndDate(),
            "resp": "debug ON"
          };
        }
        
      }
    }
  ];

  

  function saveData(){
    if (checkFile(filepath)){
      let content = undefined;
      try {
        content = fs.readFileSync(filepath);
      } catch (err){
        console.log("saveData", myEdge, ERRWEIGHT.ERROR, "Unable to read original configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
        
        //sendError("saveData", myEdge, ERRWEIGHT.ERROR, "Unable to read original configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
      }

      if (content !== undefined){
        try {
          fs.writeFileSync(backup_filepath, content, "utf8");
        } catch (err) {
          //sendError("saveData", myEdge, ERRWEIGHT.ERROR, "Unable to save backup of configuration !", {"name":instance.name, "id":instance.id, "file":backup_filepath, "err":err.message});
          console.log("saveData", myEdge, ERRWEIGHT.ERROR, "Unable to save backup of configuration !", {"name":instance.name, "id":instance.id, "file":backup_filepath, "err":err.message});
        }
      }
    }

    let a = {
      "config":instance.CONFIG,
      "private":PRIVATEVARS
    };

    try {
      fs.writeFileSync(filepath, JSON.stringify(a), "utf8");
    } catch (err) {
      //sendError("saveData", myEdge, ERRWEIGHT.CRITICAL, "Unable to save configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
      console.log("saveData", myEdge, ERRWEIGHT.CRITICAL, "Unable to save configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
    }
  }

  function loadData(){
    let content = undefined;
    //console.log(filepath);
    if (checkFile(filepath)){
      try {
        content = fs.readFileSync(filepath);
      } catch (err){
        //sendError("loadData", myEdge, ERRWEIGHT.ERROR, "Unable to read original configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
        console.log("loadData", myEdge, ERRWEIGHT.ERROR, "Unable to read original configuration !", {"name":instance.name, "id":instance.id, "file":filepath, "err":err.message});
      }
    } else {
      if (checkFile(backup_filepath)){
        try {
          content = fs.readFileSync(backup_filepath);
        } catch (err){
          //sendError("loadData", myEdge, ERRWEIGHT.CRITICAL, "Unable to read backup configuration !", {"name":instance.name, "id":instance.id, "file":backup_filepath, "err":err.message});
          console.log("loadData", myEdge, ERRWEIGHT.CRITICAL, "Unable to read backup configuration !", {"name":instance.name, "id":instance.id, "file":backup_filepath, "err":err.message});
        }
        if (content !== undefined){
          //sendError("loadData", myEdge, ERRWEIGHT.WARNING, "No configuration, loading from backup !", {"name":instance.name, "id":instance.id});
          console.log("loadData", myEdge, ERRWEIGHT.WARNING, "No configuration, loading from backup !", {"name":instance.name, "id":instance.id});
        }
      } else {
        //sendError("loadData", myEdge, ERRWEIGHT.CRITICAL, "No configuration, not even backup !", {"name":instance.name, "id":instance.id});
        console.log("loadData", myEdge, ERRWEIGHT.CRITICAL, "No configuration, not even backup !", {"name":instance.name, "id":instance.id, "filepath": filepath});
      }
    }



    if (content !== undefined){
      let a = JSON.parse(content);
      instance.send(instanceSendTo.debug, a);
      let c = a.config;
      let p = a.private;


      if (c === undefined){
        //sendError("loadData", myEdge, ERRWEIGHT.CRITICAL, "Configuration not found !", {"name":instance.name, "id":instance.id});
        console.log("loadData", myEdge, ERRWEIGHT.CRITICAL, "Configuration not found !", {"name":instance.name, "id":instance.id});
        instance.status("Error - no config", "red");
      } else if (p === undefined){
        //sendError("loadData", myEdge, ERRWEIGHT.CRITICAL, "Privatevars not found !", {"name":instance.name, "id":instance.id});
        console.log("loadData", myEdge, ERRWEIGHT.CRITICAL, "Privatevars not found !", {"name":instance.name, "id":instance.id});
        instance.status("Error - no private vars", "red");
      } else {
        instance.CONFIG = c;
        PRIVATEVARS = p;

        // Daj kazdemu device jeho tabulku prikazu
        for (let i = 0; i < PRIVATEVARS.devices.length; i++){
          let device = PRIVATEVARS.devices[i];
          for (let j = 0; j < PRIVATEVARS.cmd_tables.length; j++){
            let table = PRIVATEVARS.cmd_tables[j];

            if (device.type === table.type){
              PRIVATEVARS.devices[i].cmd = table.cmd;
            }
          }
        }

        if (myEdge === "undefined"){
          instance.status("Unconfigured", "red");
        } else {
          instance.status("Running", "green");
          startCmdWaitInterval();
  
          instance.CONFIG.isRunning = true;
          console.log("modbus loaded: ", PRIVATEVARS.devices);
        }
      }
    }
  }

  function checkFile(name){
    try {
      fs.accessSync(name, fs.constants.F_OK | fs.constants.R_OK | fs.constants.W_OK);
      return true;
    } catch (err) {
      return false;
    }
  }

  //Zapina slucku vycitavania dat
  function readDeviceData(){
    stopCmdWaitInterval();

    // let tbname = FLOW.OMS_edgeName;

    // Check port existance
    if (port === null)
    {
      port = new SerialPort(instance.CONFIG.port);

      port.on('error', function(err) {
        //logger.debug("rsPort opened error - failed", err.message);
        //instance.send(instanceSendTo.debug, err.message);
  
        errorHandler.sendMessageToService( exports.title + " MODBUS RS485 open - failed: " + err.message);
      })

      port.on('open', function() {

        console.log("--->MODBUS RS485 READY - port opened");

        exec("sudo halfduplex /dev/ttymxc1", (error, stdout, stderr) => {
          instance.send(instanceSendTo.debug, {"err": error});

          if (error) {
            console.log("--->MODBUS RS485", error, stderr);
            errorHandler.sendMessageToService( exports.title + " sudo halfduplex /dev/ttymxc1 - failed: " + error);
          }

        });

        exec(instance.CONFIG.port_options, (error, stdout, stderr) => {
          instance.send(instanceSendTo.debug, {"stdout":stdout,"stderr":stderr,"err":error});

          if (error) {
            console.log("--->MODBUS RS485", error, stderr);
            errorHandler.sendMessageToService( exports.title +  " " + instance.CONFIG.port_options  + " - failed: " + error);
          }
          
        });
        
      });

      port.on('data', receivedData);

      //sendError("readDeviceData", myEdge, ERRWEIGHT.DEBUG, "Serial port open!", {});
      //console.log("-->MODBUS readDeviceData", myEdge, ERRWEIGHT.DEBUG, "Serial port open!", {});

      startCmdWaitInterval();
      return; // Cakame na port aby sa spravne otvoril a rozbehol
    }


    // Skontroluj existenciu device listu
    if (PRIVATEVARS.devices.length > 0){
      // Ponastavuj indexy
      PRIVATEVARS.cmd_index++;
      if (PRIVATEVARS.cmd_index >= PRIVATEVARS.devices[PRIVATEVARS.device_index].cmd.length){
        // Kedže všetky príkazy pre daný device sú vybavené, je treba odoslat vyčítané data do TB
        updateDataInTB();

        PRIVATEVARS.cmd_index = 0;
        PRIVATEVARS.device_index++;

        if (PRIVATEVARS.device_index >= PRIVATEVARS.devices.length){
          PRIVATEVARS.device_index = 0;
        }
      }

      let device = PRIVATEVARS.devices[PRIVATEVARS.device_index];

      // Skontroluj existenciu príkazú pre daný device type
      if (device.cmd.length < 1){
        //sendError("readDeviceData", tbname, ERRWEIGHT.ERROR, "No commands for this device type !", {"type": device.type});
        console.log("readDeviceData", tbname, ERRWEIGHT.ERROR, "No commands for this device type !", {"type": device.type});
        startCmdWaitInterval();
        return;
      }
      
      // Odešli nasledujúci príkaz
      sendCommand();

    } else {
      instance.CONFIG.isRunning = false;
      //sendError("readDeviceData", myEdge, ERRWEIGHT.CRITICAL, "Modbus has no devices registered!", {});
      console.log("modbus_citys: readDeviceData", myEdge, ERRWEIGHT.CRITICAL, "Modbus has no devices registered!", {});
    }
  }

  function readingTimeouted(){
    stopCmdWaitInterval();
    stopTimeoutInterval();

    // let tbname = FLOW.OMS_edgeName;

    let device = PRIVATEVARS.devices[PRIVATEVARS.device_index];
    let com = device.cmd[PRIVATEVARS.cmd_index];
    //sendError("readingTimeouted", tbame, ERRWEIGHT.WARNING, "Reading timeouted !", {"device": device.address, "cmd": com.register});
    console.log("modbus_citys: readingTimeouted", tbname, ERRWEIGHT.WARNING, "Reading timeouted !", {"device": device.address, "cmd": com.register});
    
    device.timeoutcount++;
    //console.log("device.timeoutcount", device.timeoutcount);
    if (device.timeoutcount === 16)
    {

      //sendError("modbus_citys: readingTimeouted", tbname, ERRWEIGHT.CRITICAL, "Electrometer is not responding - reading timeouted", "");
      sendNotification("modbus_citys: readingTimeouted", tbname, "electrometer_is_not_responding", {}, "", instanceSendTo.tb, instance );

      if (device.status === "OK"){
        device.status === "NOK";
      }
    }

    startCmdWaitInterval();
  }

  function receivedData(data){

    //let array = [...data];
    //console.log("received data", array);

    // let tbname = FLOW.OMS_edgeName;

    //!if received data are less than 9 bytes, we store it in array variable and return. than we concatenate second incoming
    // data and then length of array is 9
    receivedDataArray = [...receivedDataArray, ...data];
    //if (array.length < 9) return;
    let l = receivedDataArray.length;
    //console.log("received",receivedDataArray, l)
    
    if ( l < 7 || l > 9 || l == 8 ) return;
    
    let device = PRIVATEVARS.devices[PRIVATEVARS.device_index];
    let com = device.cmd[PRIVATEVARS.cmd_index];
    
    if (device.timeoutcount > 16) {
      //sendError("Modbus_citysys: receivedData", tbname, ERRWEIGHT.NOTICE, "Electrometer is responding again", "");
      sendNotification("modbus_citys: receivedData", tbname, "electrometer_is_responding_again", {}, "", instanceSendTo.tb, instance );
    }

    device.timeoutcount = 0;

    if ((l == 7 && com.size != 1) || ( l == 9 && com.size != 2)) return;

    stopTimeoutInterval();
    
    //sendError("receivedData", tbname, ERRWEIGHT.DEBUG, "Received data !", {"cmd": receivedDataArray});
    //console.log("receivedData", tbname, ERRWEIGHT.DEBUG, "Received data !", {"cmd": receivedDataArray});

    // Skontroluj či sedí počet bytú v správe
    //console.log("com size", com.size*2, "array2", receivedDataArray[2]);
    if (receivedDataArray[2] !== (com.size*2)){
      //sendError("receivedData", tbname, ERRWEIGHT.ERROR, "Received data of incorrect size !", {"expected": (com.size*2), "received": receivedDataArray[2], "cmd": com.register, "whole_msg": receivedDataArray});
      console.log("modbus_citys: receivedData", tbname, ERRWEIGHT.ERROR, "Received data of incorrect size !", {"expected": (com.size*2), "received": receivedDataArray[2], "cmd": com.register, "whole_msg": receivedDataArray});
      startTimeoutInterval();
    } else {
      // Konvertuj raw data na human readable

      let v = (receivedDataArray[3] << 8) | receivedDataArray[4];
      if (com.size == 2){
        v = v | (receivedDataArray[5] << 24) | (receivedDataArray[6] << 16);
      }
      v = Math.round((v * com.multiplier) * 100) / 100;


      // Pokad device nemá ešte žádné hodnoty vyčítané, pushni túto hodnotu do pola
      if (device.data.length < 1){
        device.data.push({ // Vždy ked správne zakomunikuje obnov status na OK
          "changed": true,
          "name": "status",
          "value": "OK"
        });
        device.data.push({
          "changed": true,
          "name": com.tb_name,
          "value": v
        });
      } else {
        // Kedže už neco v poli má, kukni sa či je tam aj táto hodnota
        let found = false;
        for (let i = 0; i < device.data.length; i++){
          let d = device.data[i];
          if (d.name == "status"){ // Ked natrefíš na status (vždy tam musí byt) prepíš ho na OK lebo zakomunikoval správne
            device.data[i].changed = true;
            device.data[i].value = "OK";
          }

          if (d.name == com.tb_name){
            found = true;
            device.data[i].changed = true;
            device.data[i].value = v;
          }
        }

        // Pole existuje, ale táto hodnota tam neni, pridaj ju
        if (found === false){
          device.data.push({
            "changed": true,
            "name": com.tb_name,
            "value": v
          });
        }
      }

      //Správne sme prijali odpoveď, je čas na další msg
      startCmdWaitInterval();
    }
    //console.log('received data array', receivedDataArray);
    receivedDataArray = [];
  }

  function updateDataInTB(){
    let device = PRIVATEVARS.devices[PRIVATEVARS.device_index];

    // console.log("---- MB device", device);
    // console.log("---MB device data", device.data);

    let values = "";
    for (let i = 0; i < device.data.length; i++){
      let data = device.data[i];
      if (data.changed){
        if (values !== ""){
          values += ", ";
        }

        if (data.name === "status"){
          values += "\""+data.name+"\":\""+data.value+"\"";
          // This makes sure, that if this device doesn’t respond even once in next reading cycle, it will be marked as NOK
          device.data[i].changed = true;
          device.data[i].value = "NOK";
        } else {
          values += "\""+data.name+"\":"+data.value;
          device.data[i].changed = false;
        }
      }

    }

    //console.log("values modbus", values);
    

    if (values !== ""){

      // let tbname = FLOW.OMS_edgeName;
      // if(tbname == "" || tbname === undefined )
      // {
      //   console.log("!!!!!!FLOW.OMS_edgeName is empty - 1");
      //   return;
      // }

      let tbmsg = "{\"" + tbname + "\":[{\"ts\":"+Date.now()+", \"values\":{"+values+"}}] }";
      tbmsg = JSON.parse(tbmsg);

      values = tbmsg[tbname][0]["values"];

      //console.log("modbus", Object.keys(values));

      //sum Phase_1_power, Phase_2_power, Phase_3_power   (if one of them is undefined, we handle it)
      const numOr0 = n => isNaN(n) ? 0 : n;
      let calculated_total_power = [values["Phase_1_power"], values["Phase_2_power"], values["Phase_3_power"]].reduce((a, b) => numOr0(a) + numOr0(b));
      values["total_power"] = parseFloat(calculated_total_power.toFixed(2));
      tbmsg[tbname][0]["values"] = values;

      Object.keys(values).map(singleValue => {
        if (["Phase_1_voltage", "Phase_2_voltage", "Phase_3_voltage"].includes(singleValue)) 
        {

          let l = singleValue.split("_");
          let phase = parseInt(l[1]);

          if(FLOW.OMS_no_voltage == undefined) FLOW.OMS_no_voltage = new Set();

          if(values[singleValue] == 0)
          {
            sendNotification("modbus_citys: updateDataInTB", tbname, "no_voltage_detected_on_phase", {phase: phase}, "", instanceSendTo.tb, instance, "voltage" + phase );

            FLOW.OMS_no_voltage.add(phase);
          }
          else
          {
            FLOW.OMS_no_voltage.delete(phase);
            sendNotification("modbus_citys: updateDataInTB", tbname, "voltage_on_phase_has_been_restored", {phase: phase}, "", instanceSendTo.tb, instance, "voltage" + phase);
          }
  
        } 
      })

      sendThingsBoard(tbmsg);
    }
  }


  let electrometerNotResponding = 0;
  function sendCommand(){
    let device = PRIVATEVARS.devices[PRIVATEVARS.device_index];
    let com = device.cmd[PRIVATEVARS.cmd_index];
    let array = [device.address, 3, ((com.register >> 8) & 0xFF), (com.register & 0xFF), ((com.size >> 8) & 0xFF), (com.size & 0xFF)];
    array = modbusCRC(array);

    //console.log('---device--', device);
    //console.log('---device   type--', device.type);

    //sendError("sendCommand", device.tb_name, ERRWEIGHT.DEBUG, "Sending command !", {"cmd": array});
    //console.log("sendCommand", device.tb_name, ERRWEIGHT.DEBUG, "Sending command !", {"cmd": array});

    // let tbname = FLOW.OMS_edgeName;
    // if(tbname == "" || tbname === undefined )
    // {
    //   console.log("!!!!!!FLOW.OMS_edgeName is empty - 2");
    //   return;
    // }

    startTimeoutInterval();
    port.write(Buffer.from(array), function(err) {

      //! poslany command
      //console.log("poslany tento commant", array, err, device.type);

      if (err) {
        stopTimeoutInterval();
        stopCmdWaitInterval();


        // elektromer neodpoveda viac ako 5 minut (15 commands za minutu sa posiela)
        if (device.type === "EM111" || device.type === "EM340")
        {
          electrometerNotResponding++;

          if (electrometerNotResponding > 15 && electrometerNotResponding < 17)
          {

            //sendError("Modbus_citys: sendCommand", tbname, ERRWEIGHT.CRITICAL, "Electrometer is not responding", {"err": err.message, "info": "No response more than 5 minutes"});
            sendNotification("modbus_citys: sendCommand", tbname, "electrometer_is_not_responding", {}, {"err": err.message, "info": "No response more than 5 minutes"}, instanceSendTo.tb, instance );
  
            let tbmsg = {
              [tbname]: [
                {
                  "ts": Date.now(),
                  "values": {
                    "status": "NOK"
                  }
                }
              ]
            }
    
            sendThingsBoard(tbmsg)
          }
        }
        

        return;
      }

      if (device.type === "EM111")
      {
        if (electrometerNotResponding > 15) 
        {
          //sendError("Modbus_citys: sendCommand", tbname, ERRWEIGHT.NOTICE, "Electrometer is responding again", "");
          sendNotification("modbus_citys: sendCommand", tbname, "electrometer_is_responding_again", {}, "", instanceSendTo.tb, instance );
        }
        electrometerNotResponding = 0;
        
      }
    });
  }

  function modbusCRC(array){  
    let crc = 0xFFFF;
    for (let i = 0; i < array.length; i++){
      let b = array[i];
      crc = crc ^ b;
  
      for (let j = 8; j>0; j--){
        if ((crc & 0x0001) != 0){
          crc = crc >> 1;
          crc = crc ^ 0xA001;
        } else {
          crc = crc >> 1;
        }
      }
    }
    
    array.push(crc & 0xFF);
    array.push((crc >> 8) & 0xFF);
    
    return array;
  }


  instance.on('data', function(flowdata) {
    
    console.log("flowdata on data", flowdata);
    sendStatus({"CONFIG": instance.CONFIG, "PRIVATEVARS":PRIVATEVARS})

  });

  instance.reconfigure = function() {
    
    //TODO remove ftom options
    myEdge = instance.options.edge;
    if (starter === null){
      starter = setInterval(function(){
        loadData();
        clearInterval(starter);
        starter = null;
      }, 5000);
    }
  };
  
  instance.close = function() {
    // close sockets and such
  };

  function sendError(func, device, weight, str, extra){
    if ((weight === ERRWEIGHT.DEBUG) && (instance.CONFIG.debug === false)){
      return; // Allow debug messages only if CONFIG.debug is active
    }

    let content = {
      "type": weight,
      "status": "new",
      "source": {
        "func":func,
        "component":instance.id,
        "component_name":instance.name,
        "edge":myEdge
      },
      "message":str,
      "message_data": extra
    };
    let msg = {};
    msg[device] = [
      {
        "ts": Date.now(),
        "values": {
          "_event":content
        }
      }
    ];

    // Msg can be outputted from components only after configuration
    /*if (canSendErrData()){
      sendBufferedErrors();
    } else {
      bufferError(msg);
    }*/
    instance.send(instanceSendTo.tb, msg); // Even if error server is unavailable, send this message to output, for other possible component connections



    function sendBufferedErrors(){
      if (PRIVATEVARS.errBuffer === undefined){
        console.log("errBuffer undefined");
        console.log("private: ", PRIVATEVARS);
      }
      console.log("errBuffer size: ", PRIVATEVARS.errBuffer.length);
      if (PRIVATEVARS.errBuffer.length > 0){
        for (let i = 0; i < PRIVATEVARS.errBuffer.length; i++){
          instance.send(instanceSendTo.error, PRIVATEVARS.errBuffer[i]);
        }
        PRIVATEVARS.errBuffer = []; //Clear the buffer
        saveData();
      }
    }

    function bufferError(msg){
      PRIVATEVARS.errBuffer.push(msg);
      saveData();
    }
  }

  function canSendErrData(){
    //if (FLOW.errServerAvailable)
      return true;
    //else
    //  return false;
  }

  function sendStatus(str){
    instance.send(instanceSendTo.debug, str);
  }

  function sendThingsBoard(obj){
    // Msg can be outputted from components only after configuration
    /*if (canSendTbData()){
      sendBufferedTB();
    } else {
      console.log("cant send data");
      bufferTB(str);
    }*/
    //console.log("send thingsboard", str);

    //console.log("FLOW.OMS_edgeName", FLOW.OMS_edgeName, obj);

    if(obj.hasOwnProperty(FLOW.OMS_edgeName) && FLOW.OMS_edgeName != "")
    {
      //send it to di_do_controller 
      instance.send(instanceSendTo.di_do_controller, {sender: "modbus_citysys", tbdata: obj});
    }
    // else
    {
      instance.send(instanceSendTo.tb, obj); // Even if TB server is unavailable, send this message to output, for other possible component connections
    }

    //instance.send(2, str); // Even if TB server is unavailable, send this message to output, for other possible component connections


    function sendBufferedTB(){
      if (PRIVATEVARS.tbBuffer.length > 0){
        console.log("sending buffered: ", PRIVATEVARS.tbBuffer.length );
        for (let i = 0; i < PRIVATEVARS.tbBuffer.length; i++){
          instance.send(instanceSendTo.tb, PRIVATEVARS.tbBuffer[i]);
        }
        PRIVATEVARS.tbBuffer = []; //Clear the buffer
        saveData();
      }
    }

    function bufferTB(str){
      PRIVATEVARS.tbBuffer.push(str);
      saveData();
    }
  }

  function canSendTbData(){
    //if (FLOW.tbAvailable)
      return true;
    //else
    //  return false;
  }

  function startTimeoutInterval(){
    if (!timeoutInterval){
      timeoutInterval = setInterval(readingTimeouted, instance.CONFIG.timeoutTime);
    }
  }

  function stopTimeoutInterval(){
    if (timeoutInterval){
      clearInterval(timeoutInterval);
      timeoutInterval = null;
    }
  }

  function startCmdWaitInterval(){
    if (!msgWaitInterval){
      msgWaitInterval = setInterval(readDeviceData, instance.CONFIG.msgWaitTime);
    }
  }

  function stopCmdWaitInterval(){
    if (msgWaitInterval){
      clearInterval(msgWaitInterval);
      msgWaitInterval = null;
    }
  }

  instance.on('options', instance.reconfigure);
  instance.reconfigure();

  // LAST SECTION FOR COMMON FUNCTIONS
  function humanReadableTimeAndDate(){
    let date_ob = new Date();

    let date = ("0" + date_ob.getDate()).slice(-2);
    let month = ("0" + (date_ob.getMonth() + 1)).slice(-2);
    let year = date_ob.getFullYear();
    
    let hours = ("0" + date_ob.getHours()).slice(-2);
    let minutes = ("0" + date_ob.getMinutes()).slice(-2);
    let seconds = ("0" + date_ob.getSeconds()).slice(-2);

    return date+"."+month+"."+year+" "+hours+":"+minutes+":"+seconds;
  }

  if (starter === null){
    starter = setInterval(function(){
      loadData();
      clearInterval(starter);
      starter = null;
    }, 5000);
  }

  //setTimeout(loadData, 5000);
};