package com.company;
        import javax.swing.*; //All components in swing are JComponent which can be added to container classes.All components in swing are JComponent which can be added to container classes.
        import java.awt.*; //I shall start with the AWT before moving into Swing to give you a complete picture of Java Graphics.
        import java.awt.event.*; //Contains all of the classes for creating user interfaces and for painting graphics and images.
        import java.awt.image.BufferStrategy; //The BufferStrategy class represents the mechanism with which to organize complex memory on a particular Canvas or Window
        import java.io.FileWriter;
        import java.io.IOException;
        import java.io.PrintWriter;

public class Main extends Canvas implements Runnable{

    final static int WIDTH = 540;
    final static int HEIGHT = 540;
    final int TITLE_BAR_HEIGHT = 120;
    int x, y, radius;
    int dx, dy;
    //int objectW = 50, objectH = 50;
    private Thread thread;
    private boolean running = false;

    private JFrame frame;

    public JTextArea wResult = new JTextArea();

    public Main(){

        this.x = 20;
        this.y = 50;
        this.radius = 100;
        this.dx = 1;
        this.dy = 1;

        /*
        frame = new JFrame();

        frame.setSize(640, 640);
        frame.setTitle("Shapes");
        frame.setLocationRelativeTo(null);
        frame.setResizable(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.add(this);
        frame.setVisible(true);
        */
        createFrame("Result", 640, 640);
        wResult.setBounds(0,0,640,640);
        frame.add(wResult);

        createFrame("Shapes", 640, 640);


        start();

        frame.addComponentListener(new ComponentAdapter() {
            @Override
            public void componentResized(ComponentEvent e) {
                int height = frame.getHeight();
                int width = frame.getWidth();
                System.out.println('R');
                //wResult.append("R");
                update();
            }

            @Override
            public void componentMoved(ComponentEvent e) {
                int height = frame.getHeight();
                int width = frame.getWidth();
                System.out.println('M');
                //wResult.append("M" + "\n");
                update();
            }
        });
    }

    public void createFrame(String title, int width, int height){
        frame = new JFrame();

        frame.setSize(width, height);
        frame.setTitle(title);
        frame.setLocationRelativeTo(null);
        frame.setResizable(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.add(this);
        frame.setVisible(true);
    }

    public void start(){
        thread = new Thread(this);
        thread.start();
        running = true;
    }

    @Override
    public void run(){


        long lastTime = System.nanoTime();
        double amountOfUpdate = 60.0;
        double ns = 1000000000 / amountOfUpdate;
        double delta = 0;
        long timer = System.currentTimeMillis();
        int frames = 0;

        while(running){
            long now = System.nanoTime();
            delta += (now - lastTime) / ns;
            lastTime = now;
            while(delta >= 1){
                //update();
                delta--;
            }
            if(running)
                render();
            frames++;

            if(System.currentTimeMillis() - timer > 1000){
                timer += 1000;
                System.out.println("FPS: " + frames);

                wResult.append("FPS: " + frames + "\n"); //Append: this is only adding if I use setText everytime it is making update.


                frames = 0;
            }
        }
    }

    public void update(){
        radius = ((frame.getWidth() / 50) * (frame.getHeight() / 50))/2;
    }

    public void render() {
        BufferStrategy bs = this.getBufferStrategy();
        if(bs == null){
            this.createBufferStrategy(1);
            return;
        }

        Graphics g = bs.getDrawGraphics();

        //g.clearRect(0, 0, getWidth(), getHeight());
        g.setColor(Color.RED);
        g.fillOval((getWidth()-radius)/2 , (getHeight()-
                radius+TITLE_BAR_HEIGHT)/2, radius, radius);

        g.setColor(Color.YELLOW);
        g.fillRect((getWidth()-150)/3, ((getHeight()-150+TITLE_BAR_HEIGHT)/3),
                radius, radius);

        g.setColor(Color.YELLOW);
        g.fillRect(((getWidth()-100)/3)*2,
                (getHeight()-150+TITLE_BAR_HEIGHT)/3, radius, radius);
    }

    public static void main(String[] args) {
        new Main();
    }
}