/**
 *
 * Copyright @German Kuznetsov
 */

package your.package;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;

/**
 *
 * some code ripped from
 * http://www.gamedev.net/page/resources/_/technical/general-programming/java-games-active-rendering-r2418
 */
public class Main {

    private static JFrame frame; //Lets define some stuff we will be using
    private static Canvas canvas;
    private static BufferStrategy buffer;

    public static final int WIDTH = 600; //Our window size
    public static final int HEIGHT = 400;

    public static int MouseX, MouseY; //These variables will hold values for the mouse.
    public static boolean LeftMouseButtonDown, MouseWheelDown, RightMouseButtonDown;

    public static final boolean[] keyDown = new boolean[65536]; //This list will hold the position of keys (up/down)

    public static void main(String[] args) {
        //create our window
        frame = new JFrame();
        frame.setIgnoreRepaint(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //create our canvas to draw on
        canvas = new Canvas();
        canvas.setIgnoreRepaint(true);
        canvas.setSize(WIDTH, HEIGHT);

        //pack our canvas into our frame
        frame.add(canvas);
        frame.pack();
        frame.setVisible(true);

        //add a mouselistener to our window (mouse button pressed / released)
        canvas.addMouseListener(new MouseListener() {

            public void mouseClicked(MouseEvent e) {
            }

            public void mousePressed(MouseEvent e) {
                switch (e.getButton()) {
                    case 1:
                        leftMouseButtonDown = true;
                        break;
                    case 2:
                        mouseWheelDown = true;
                        break;
                    case 3:
                        rightMouseButtonDown = true;
                        break;
                }
            }

            public void mouseReleased(MouseEvent e) {
                switch (e.getButton()) {
                    case 1:
                        leftMouseButtonDown = true;
                        break;
                    case 2:
                        mouseWheelDown = true;
                        break;
                    case 3:
                        rightMouseButtonDown = true;
                        break;
                }
            }

            public void mouseEntered(MouseEvent e) {
            }

            public void mouseExited(MouseEvent e) {
            }

        });
       // //add a mouse motion listener to our window (Mouse moved)
        canvas.addMouseMotionListener(new MouseMotionListener() {

            @Override
            public void mouseDragged(MouseEvent e) {
                MouseX = e.getX();
                MouseY = e.getY();
            }

            @Override
            public void mouseMoved(MouseEvent e) {
                MouseX = e.getX();
                MouseY = e.getY();
            }
        });

       //add Key Listener (Key pressed/ released)
        canvas.addKeyListener(new KeyListener() {

            @Override
            public void keyTyped(KeyEvent ke) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void keyPressed(KeyEvent e) {
                keyDown[e.getKeyCode()] = true;
            }

            @Override
            public void keyReleased(KeyEvent e) {
                keyDown[e.getKeyCode()] = false;
            }
        });
//buffer setup
        canvas.createBufferStrategy(2);
        buffer = canvas.getBufferStrategy();

      //our game loop
        Graphics graphics = null;
        while (true) {
            try {
                update();
                render(graphics);
                if (!buffer.contentsLost()) {
                    buffer.show();
                }
            } finally {
                if (graphics != null) {
                    graphics.dispose();
                }

            }

        }
    }

   //RENDER YOUR STUFF HERE
    public static void render(Graphics graphics) {
        graphics = buffer.getDrawGraphics(); //Clears back buffer

        graphics.setColor(Color.BLACK);
        graphics.fillRect(0, 0, WIDTH, HEIGHT);
        graphics.setColor(new Color(255, 0, 255));
        graphics.fillRect(MouseX, MouseY, 5, 5);
    }

    public static void update() {

    }

    private void setButton(int button, boolean b) {
        switch (button) {
            case 1:
                leftMouseButtonDown = b;
                break;
            case 2:
                mouseWheelDown = b;
                break;
            case 3:
                rightMouseButtonDown = b;
                break;
        }
    }
}