package pack.script.game;

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;

import javax.swing.JFrame;

public class Game extends Canvas implements Runnable {
    private static final long serialVersionUID = 1L;

    public boolean iRUNNING = false;
    public int cTICKCOUNT = 0;

    public static final String sNAME = "Java Game";
    public static final String sVER = "v1.00";
    public static final int sSIZE = 40;
    public static final int sSCALE = 16;
    public static int iSCALE = 1;

    public static final String sDISPLAYNAME = sNAME + " " + sVER;
    public static final int sWIDTH = sSIZE * sSCALE;
    public static final int sHEIGHT = sWIDTH / 12 * 9;
    public static int iWIDTH = sWIDTH * iSCALE;
    public static int iHEIGHT = sHEIGHT * iSCALE;
    public static Dimension sDIMENSION = new Dimension(iWIDTH,iHEIGHT);

    private BufferedImage iIMAGE = new BufferedImage (iWIDTH, iHEIGHT, BufferedImage.TYPE_INT_RGB);
    private int[] pixels = ((DataBufferInt) iIMAGE.getRaster().getDataBuffer()).getData();
    private JFrame sFRAME;

    public Game() {
        setMinimumSize(sDIMENSION);
        setMaximumSize(sDIMENSION);
        setPreferredSize(sDIMENSION);

        sFRAME = new JFrame(sDISPLAYNAME);
        sFRAME.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        sFRAME.setLayout(new BorderLayout());
        sFRAME.add(this, BorderLayout.CENTER);
        sFRAME.pack();

        sFRAME.setResizable(false);
        sFRAME.setLocationRelativeTo(null);
        sFRAME.setVisible(true);
    }

    public synchronized void start() {
        iRUNNING = true;
        new Thread(this).start();
    }

    public synchronized void stop() {
        iRUNNING = false;
    }

    public void run() {
        long cLASTTIME = System.nanoTime();
        double sNSPERTICK = 1000000000D / 60D;

        int cFRAMES = 0;
        int cTICKS = 0;

        long cLASTTIMER = System.currentTimeMillis();
        double delta = 0;

        while (iRUNNING) {
            long cNOWTIME = System.nanoTime();
            delta += (cNOWTIME - cLASTTIME) / sNSPERTICK;
            cLASTTIME = cNOWTIME;
            boolean shouldRender = true;

            while (delta >= 1) { cTICKS++; tick(); delta--; shouldRender = true; }

            try { Thread.sleep(2); } catch (InterruptedException e)
            { e.printStackTrace(); }

            if (shouldRender) { cFRAMES++; render(); }
            if (System.currentTimeMillis() - cLASTTIMER >= 1000) {
                cLASTTIMER += 1000;
                System.out.println(cFRAMES + " frames, " + cTICKS + " ticks");
                cFRAMES = 0; cTICKS = 0;
            }
        }
    }

    public void tick() {
        cTICKCOUNT++;
        for (int i = 0; i < pixels.length; i++) {
            pixels[i] = i + cTICKCOUNT;
        }
    }

    public void render() {
        BufferStrategy sBUFFERSTRATEGY = getBufferStrategy();
        if (sBUFFERSTRATEGY == null) {
            createBufferStrategy(3);
            return;
        }

        Graphics sGRAPHICS = sBUFFERSTRATEGY.getDrawGraphics();
        sGRAPHICS.drawImage(iIMAGE, 0, 0, getWidth(), getHeight(), null);

        sGRAPHICS.setColor(Color.WHITE);
        sGRAPHICS.fillRect(0, 0, getWidth(), getHeight());

        sGRAPHICS.setColor(Color.BLACK);
        sGRAPHICS.fillRect(2, 2, (getWidth() - 2), (getHeight() - 2));

        sGRAPHICS.dispose();
        sBUFFERSTRATEGY.show();
    }

    public static void main(String[] args) {
        new Game().start();
    }
}