package nl.jorikoolstra.jLevel.Game;

import nl.jorikoolstra.jLevel.Graphics.ScreenManager;

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


public final class GameMain extends JFrame
{
    public static final int FPS = 75;
    public static final int GENERATE_MAX_FPS = 0;

    public static final Font DEFAULT_FONT = new Font("Courier", Font.PLAIN, 24);

    private static ScreenManager screenManager;



    public static void main(String[] args)
    {
        if (args.length != 3)
        {
            System.exit(1);
        }

        new GameMain(args);
    }


    private GameMain(String[] args)
    {
        try
        {
            if (initializeGameEnvironment(args) == false)
            {
                this.dispose();
                System.exit(0);
            }

            gameLoop();
        }
        finally
        {
            screenManager.restoreScreen();
        }

        this.dispose();
        System.exit(0);
    }


    private void gameLoop()
    {
        while (true)
        {
            Graphics2D screenGraphics = screenManager.getGraphics();

            /* Update screen */
            draw(screenGraphics);
            screenGraphics.dispose();
            screenManager.updateGraphicsDisplay();


            if (FPS != GENERATE_MAX_FPS)
            {
                try
                {
                    /* Render no more than FPS frames per second */
                    Thread.sleep(1000 / FPS);
                }
                catch (InterruptedException ex) {}
            }
        }
    }


    private void draw(Graphics g)
    {
        /* Set default font */
        setFont(DEFAULT_FONT);

        /* Clear the screen */
        g.clearRect(0, 0, screenManager.getWidth(), screenManager.getHeight());

        g.drawString("This is just a test string too see the flickering...", 100, 100);
    }


    private boolean initializeGameEnvironment(String[] args)
    {
        /* ------ Initialize graphics environment ------ */
        DisplayMode displayMode = new DisplayMode(Integer.parseInt(args[0]) /* width */,
                              Integer.parseInt(args[1]) /* heigth */,
                              Integer.parseInt(args[2]) /* bit depth */,
                              DisplayMode.REFRESH_RATE_UNKNOWN /* refresh rate */);

        screenManager = new ScreenManager();

        screenManager.setFullScreen(displayMode, this);

        return true;
    }
}