import java.lang.*;
import java.awt.*;
import nathanw.*;

/** 
 * The Tetris class is the applet implementation.
 * Two parameters are read in: X and Y, which
 * specify the size of the playing area.
 * @author: Nathan J. Williams <nathanw@mit.edu>
 */

public class Tetris extends java.applet.Applet implements Runnable {
    /** the state of the game  */
    TetrisGame game;
    /** the game loop thread */
    Thread gameRunner;
    /** Size of the display area */
    int xs,ys;
    int x,y;
    ScoreBox box;
    boolean gameOver;

    /**
     * Overrides init() in java.applet.Applet
     * Parses attributes, initializes variables, 
     * calls resize() and getfocus().
     */

    public void init()
	{

	System.out.println("Class string:"+toString());
        
        try {
	    x=Integer.parseInt(getParameter("X"));
	    } catch (NullPointerException e) { x=10; }
	      catch (NumberFormatException e) { x=10; }

        try {
	    y=Integer.parseInt(getParameter("Y"));
	    } catch (NullPointerException e) { y=20; }
	      catch (NumberFormatException e) { y=20; }
         
        game=new TetrisGame(x,y,false);
	box=new ScoreBox("Score: ");
	xs=x*10+16;  // Play area
        ys=y*10+4   // Play area
	   +60;    // Score box
	resize(xs,ys);
	requestFocus();
	}

    public void start()
	{
        if(gameRunner==null)
	    {
	    gameRunner = new Thread(this);
	    gameRunner.start();
	    }
        }

    public void stop()
        {
	if(gameRunner.isAlive())
	    gameRunner.stop();
	gameRunner=null;
	}
    
    public void destroy()
	{
	}
   
    public void run()
	{
	gameOver=false;
        while(!gameOver)
	    {
	    gameOver=game.step();
	    repaint();
	try {Thread.sleep(400);} catch (InterruptedException e){}
	    }
        }


    public void paint(Graphics g)
	{
	game.paint(g,2,2);
        box.setScore(game.score());
	box.paint(g,5,ys-40);
	if(gameOver)
	    {
	    Font tmp=getFont();
	    g.setColor(Color.red);
	    g.setFont(new java.awt.Font("TimesRoman",Font.BOLD,18));
            g.drawString("Game Over",10,ys/2);
	    g.setFont(tmp);
	    g.setColor(Color.black);
	    }
	}

    public boolean keyDown(java.awt.Event evt, int key) 
        {

	switch ((char)key)
	    {
	    case 'R': game = new TetrisGame(x,y,false); 
		      stop();
	              start();
		      break;
            }

	if(!gameOver)
	    {
	    switch ((char)key)
	        {
	        case 'h':
	        case 'H': game.move_left(); repaint(); break;
	        case 'l':
	        case 'L': game.move_right(); repaint(); break;
	        case 'j':
       	        case 'J': game.rotate_ccw(); repaint(); break;
	        case 'k':
                case 'K': game.rotate_cw(); repaint(); break;
	        case ' ': game.drop(); repaint(); break;
                }
	  }


	return true;
      }
}