/*
 * A simple slot machine game.
 * Feel free to re-use any part of this code.
 * author
 * Jamie M. Hall, jamihall@mhv.net 1/9/96
 * Web page: http://www1.mhv.net/~jamihall
 * Email: jamihall@mhv.net
-->
 */

import java.applet.*;
import java.awt.*;

public class Slot extends Applet implements Runnable {

  Image displayLeft, displayCenter, displayRight, slotImages[];
  Label score;
  boolean spinMe = false;
  Thread animator = null;
  int spinSequence = 0, endSequence = 0;

  public void init() {
    int i, slotImagesLen = 0;
    Panel p, q, r;
    Button spin;

    setFont(new Font("TimesRoman", Font.BOLD, 24));
    setBackground(Color.cyan);
    setForeground(Color.magenta);
    setLayout(new BorderLayout());

    slotImages = new Image[4];
    for (i = 1; i < 5; i++) {
      Image im = getImage(getCodeBase(), "T" + i + ".gif");      
      if (im == null) {
	break;
      }
      slotImages[slotImagesLen++] = im;
    }

    add("South", p = new Panel());
    p.setLayout(new BorderLayout());    
    p.add("North", new Label(""));
 
    p.add("Center", q = new Panel());
    q.setLayout(new FlowLayout());
    q.add(spin = new Button("  Spin  "));
    spin.setBackground(Color.blue);

    p.add("South", r = new Panel());
    r.setLayout(new FlowLayout());
    r.add(new Label("Total:"));
    r.add(score = new Label());
    score.setForeground(Color.red);

    newGame();
  }

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

  public void stop() {
    if (animator != null) {
      animator.stop();
      animator = null;
     }
  }

  public void run () {
    Thread.currentThread().setPriority(Thread.MIN_PRIORITY);

    while (size().width > 0 && size().height > 0 && animator != null) {
      repaint();
      try { Thread.sleep(300); } catch (InterruptedException e) {};
    }
  }

  public void update(Graphics g) {
    int i;

    if (Integer.valueOf((score.getText()).trim()).intValue() < 1) {
      endGame(g);
    } else if (spinMe) { 
      spinAnimate();
      paint(g);
    } else { 
      paint(g);
    }
  }

  public void paint(Graphics g) {
    g.drawImage(displayLeft, (int)(size().width * .05), (int)(size().height * .1), 
		((size().width/3)-30), (int)(size().height * .5), this);
    g.drawImage(displayCenter, (int)(size().width * .35), (int)(size().height * .1), 
		((size().width/3)-30), (int)(size().height * .5), this);
    g.drawImage(displayRight, (int)(size().width * .65), (int)(size().height * .1), 
		((size().width/3)-30), (int)(size().height * .5), this);
  }

  public boolean action(Event evt, Object arg) {
    if (evt.target instanceof Button)
      spinMe = true;
    return true;
  }

  public void newGame() {
    displayLeft = slotImages[0];
    displayCenter = slotImages[0];
    displayRight = slotImages[0];

    score.setText(" 10 ");
  }

  public void endGame(Graphics g) {
    if (++endSequence < 4) {
      g.clearRect(0, 0, size().width, size().height);
      g.drawString("Sorry", (size().width - 75)/2, (size().height - 50)/2);
    } else if (endSequence % 2 == 0) {
      g.clearRect(0, 0, size().width, size().height);
      g.drawString("You Lose!", (int)((Math.random() * 1000) % (size().width - 130)), 
		   (int)(((Math.random() * 1000) % (size().height - 140)) + 25));
    } else if (endSequence == 41) {
      g.clearRect(0, 0, size().width, size().height);
      endSequence = 0;
      newGame();
    }
  }

  public void doSpin() {
    int newImage, special = 0;

    newImage = (int)(((Math.random() * 1000) % 3) + .7) ;
    displayLeft = slotImages[newImage];
    if (displayLeft == slotImages[0]) {
      special += 1;
    }

    newImage = (int)(((Math.random() * 1000) % 3) + .7);
    displayCenter = slotImages[newImage];
    if (displayCenter == slotImages[0]) {
	special += 1;
    }

    newImage = (int)(((Math.random() * 1000) % 3) + .7);
    displayRight = slotImages[newImage];
    if (displayRight == slotImages[0]) {
	special += 1;
    }

    if (special == 3) {
      score.setText(String.valueOf(Integer.valueOf((score.getText()).trim()).intValue() + 1000));
      spinWin(1000);
    } else if (special == 2) {
      score.setText(String.valueOf(Integer.valueOf((score.getText()).trim()).intValue() + 25));
      spinWin(25);
    } else if ((displayLeft == displayCenter) && (displayLeft == displayRight)) {
      score.setText(String.valueOf(Integer.valueOf((score.getText()).trim()).intValue() + 5));
      spinWin(5);
    } else {
      score.setText(String.valueOf(Integer.valueOf((score.getText()).trim()).intValue() - 1));
      getAppletContext().showStatus("Sorry, you lose");
    }
  }

  public void spinAnimate() {
    int newImage;
    int i;

    newImage = (int)(((Math.random() * 1000) % 3) + .7) ;
    displayLeft = slotImages[newImage];

    newImage = (int)(((Math.random() * 1000) % 3) + .7);
    displayCenter = slotImages[newImage];

    newImage = (int)(((Math.random() * 1000) % 3) + .7);
    displayRight = slotImages[newImage];

    if (++spinSequence > 2) {
      spinMe = false;
      spinSequence = 0;
      doSpin();
    }
  }

  public void spinWin(int points) {
    getAppletContext().showStatus("You win " + Integer.toString(points) +
				  " points - mazel tov!");
  }

  public String getAppletInfo() {
    return "Java Virtual Slot Machine by Jamie M. Hall, 1996";
  }

}