var net = require('net');
var config = require('./config.json');

const { ipcRenderer } = require('electron');

//var client = new net.Socket();
var client = new net.Socket();
var msg = ''; // Current message, per connection.

 setTimeout(connectTNC, 3000)
 



function connectTNC(){
//exports.connectTNC = function(){

    console.log('connecting to TNC...')
    
    //clear message buffer after reconnecting or inital connection
    msg = '';
    
    console.log(exports)
   
    //tnc_host = '192.168.178.163'
    //tnc_port = 3000
      client.connect(config.tnc_port, config.tnc_host)
    //client.setTimeout(5000);
}

client.on('connect', function(data) {
   console.log('TNC connection established')
})

client.on('error', function(data) {
	console.log('TNC connection error');


	    let Data = {
                    busy_state: "-",
                    arq_state: "-",
                    channel_state: "-",
                    frequency : "-",
                    mode: "-",
                    bandwith: "-",
                    rms_level : 0

        };
	    ipcRenderer.send('request-update-tnc-state', Data);	
	
    setTimeout(connectTNC, 2000)
   // setTimeout( function() { exports.connectTNC(tnc_host, tnc_port); }, 2000 );

});

/*
client.on('close', function(data) {
	console.log(' TNC connection closed');
    setTimeout(connectTNC, 2000) 
});
*/

client.on('end', function(data) {
	console.log('TNC connection ended');
    //setTimeout(connectTNC, 2000)  
    setTimeout(connectTNC, 0)  

  //      setTimeout( function() { exports.connectTNC(tnc_host, tnc_port); }, 2000 );

});


//exports.writeTncCommand = function(command){    
  writeTncCommand = function(command){    
  
    console.log(command)
    // we use the writingCommand function to update our TCPIP state because we are calling this function a lot
	// if socket openend, we are able to run commands
    if(client.readyState == 'open'){
    	//uiMain.setTNCconnection('open')
	    client.write(command + '\n');
    }
    
    if(client.readyState == 'closed'){
   		//uiMain.setTNCconnection('closed')
   		console.log("CLOSED!!!!!")
    }

    if(client.readyState == 'opening'){
		//uiMain.setTNCconnection('opening')
   		console.log("OPENING!!!!!")

    }       
}


  
client.on('data', function(data) {

/* 
stackoverflow.com questions 9070700 nodejs-net-createserver-large-amount-of-data-coming-in
*/
    
    data = data.toString('utf8'); // convert data to string
    msg += data.toString('utf8'); // append data to buffer so we can stick long data together
 
/* 
    if (msg.charCodeAt(msg.length - 1) == 0) {
      client.emit('message', msg.substring(0, msg.length - 1));
      msg = '';
      console.log("END OF FILE")
    }
  */
  
  /*
    if (msg.startsWith('{"COMMAND":')) {
    	msg = '';
    	msg += data.toString('utf8');
    	console.log("BOF detected!")
   } 
   */
   
   // check if we reached an EOF, if true, clear buffer and parse JSON data
    if (data.endsWith('}')) {
    	//console.log(msg)
    	try {
    		//console.log(msg)
      		data = JSON.parse(msg)
      	} catch (e) {
    		console.log(e); /* "SyntaxError*/
		}
      msg = '';
      /* console.log("EOF detected!") */
      
      
     
	
	
	if(data['COMMAND'] == 'TNC_STATE'){
	    let Data = {
                    ptt_state: data['PTT_STATE'],
                    busy_state: data['TNC_STATE'],
                    arq_state: data['ARQ_STATE'],
                    channel_state: data['CHANNEL_STATE'],
                    frequency : data['FREQUENCY'],
                    mode: data['MODE'],
                    bandwith: data['BANDWITH'],
                    rms_level : (data['AUDIO_RMS']/1000)*100
        };
        console.log(Data)
	    ipcRenderer.send('request-update-tnc-state', Data);	
	}
	
	if(data['COMMAND'] == 'DATA_STATE'){
	    let Data = {
                    rx_buffer_length: data['RX_BUFFER_LENGTH'],
                    tx_n_max_retries: data['TX_N_MAX_RETRIES'],
                    arq_tx_n_frames_per_burst: data['ARQ_TX_N_FRAMES_PER_BURST'],
                    arq_tx_n_bursts: data['ARQ_TX_N_BURSTS'],
                    arq_tx_n_current_arq_frame: data['ARQ_TX_N_CURRENT_ARQ_FRAME'],
                    arq_tx_n_total_arq_frames : data['ARQ_TX_N_TOTAL_ARQ_FRAMES'],
                    arq_rx_frame_n_bursts: data['ARQ_RX_FRAME_N_BURSTS'],
                    arq_rx_n_current_arq_frame: data['ARQ_RX_N_CURRENT_ARQ_FRAME'],
                    arq_n_arq_frames_per_data_frame: data['ARQ_N_ARQ_FRAMES_PER_DATA_FRAME'],
        };
        console.log(Data)
	    ipcRenderer.send('request-update-data-state', Data);	
	}

	if(data['COMMAND'] == 'HEARD_STATIONS'){
	    let Data = {
                    dxcallsign: data['DXCALLSIGN'],
                    dxgrid: data['DXGRID'],
                    timestamp: data['TIMESTAMP'],
                    datatype: data['DATATYPE'],
        };
        console.log(Data)
	    ipcRenderer.send('request-update-heard-stations', Data);	
	}
	
	
		
	// check if EOF	...
    }
	
	
	
});

function hexToBytes(hex) {
    for (var bytes = [], c = 0; c < hex.length; c += 2)
    bytes.push(parseInt(hex.substr(c, 2), 16));
    return bytes;
}








//Save myCall 
  exports.saveMyCall = function(callsign){
        command = '{"type" : "SET", "command": "MYCALLSIGN" , "parameter": "'+ callsign +'" }'
        writeTncCommand(command)
}

// Save myGrid
  exports.saveMyGrid = function(grid){
        command = '{"type" : "SET", "command": "MYGRID" , "parameter": "'+ grid +'" }'
        writeTncCommand(command)
}

//Get TNC State
 exports.getTncState = function(){
        command = '{"type" : "GET", "command": "TNC_STATE"}';
        writeTncCommand(command)
}

//Get DATA State
 exports.getDataState = function(){
        command = '{"type" : "GET", "command": "DATA_STATE"}';
        writeTncCommand(command)
}

//Get Heard Stations
 exports.getHeardStations = function(){
        command = '{"type" : "GET", "command": "HEARD_STATIONS"}';
        writeTncCommand(command)
}


// Send Ping
 exports.sendPing = function(dxcallsign){
        command = '{"type" : "PING", "command" : "PING", "dxcallsign" : "' + dxcallsign + '"}'
        writeTncCommand(command)
}

// Send CQ
 exports.sendCQ = function(){
          command = '{"type" : "CQ", "command" : "CQCQCQ"}'
        writeTncCommand(command)      
}