import java.awt.*;
import javax.swing.*;
import java.awt.event.*;


public class TrafficLight extends JFrame{

      Signal green = new Signal(Color.green);
      Signal yellow = new Signal(Color.yellow);
      Signal red = new Signal(Color.red);
      Waktu waktu = new Waktu();
      Time time = new Time();
      int tick = 1;
      int duration;
      int state = 0;

    public TrafficLight(){


        green.turnOn(false);
        yellow.turnOn(false);
        red.turnOn(true);

        JPanel trafficPanel = new JPanel(new GridLayout(4,1));
        trafficPanel.add(red);
        trafficPanel.add(yellow);
        trafficPanel.add(green);
        trafficPanel.add(waktu);

        getContentPane().add(trafficPanel);
        pack();

        duration = time.Red();
        Timer timer = new Timer(1000, new ActionListener(){
       @Override
       public void actionPerformed(ActionEvent e) {

         int timeRemaining = duration - tick;
         if (timeRemaining <= 0) {
           tick = 0;
           state++;
           changeSignalState(state);
           changeTime(state);
         }
         waktu.setValue(duration - tick);
         tick++;
       }
     });
     timer.setRepeats(true);
     timer.setCoalesce(true);
     timer.start();
    }

   private boolean changeToBool(int state){
     if (state % 3 > 0 ){
       return false;
     } else {
       return true;

     }
   }

   private void changeTime(int state){
     if(state %3 == 0)
     {
       duration = time.Red();
     }
     if(state %3 == 1)
     {
       duration = time.Green();
     }
     if(state %3 == 2)
     {
       duration = time.Yellow();
     }
    }

    public static void main(String[] args){
        TrafficLight trafficLight = new TrafficLight();
        trafficLight.setVisible(true);
    }

     private void changeSignalState(int state){
     green.turnOn(changeToBool(state + 2));
     yellow.turnOn(changeToBool(state + 1));
     red.turnOn(changeToBool(state));
   }

}