//  This is a simple card game applet.  There are two players,
//  specified as PARAMs, Player1 and Player2.  Each is dealt three
//  cards when the deal button is hit.  To view the cards, hit the 
//  show button.  The scores are kept below where the cards are
//  displayed.
//
//  Jason Duncan
//  ID 1687253



import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class CardGame extends Applet implements ActionListener {
    final static int CARDSDEALT=6;  //Number of cards to deal each round
    final static int NUMCARDS=52;   //Number of cards in the deck

    String player1;       //The players names
    String player2;
    int score1=0;         //The players scores
    int score2=0;
    int card[];           //Array used for duplicate cards dealt checking
    TextField txtScore2;  //Textboxes to hold players' scores
    TextField txtScore1;
    Button cmdDeal;       //Buttons  
    Button cmdShow;
    Button cmdReset;
    Image[] cardFront;    //Array of Card Images
    Image cardBack;       //Cardback image
    ImageCanvas[] cardCanvas; //Canvas used to display card images 


    public void init() {
	
	// Get Parameters
	player1=getParameter("Player1");
	if (player1 == null) {
	    player1="Player 1";
	}
	player2= getParameter("Player2");
	if (player2 == null) {
	    player2="Player 2";
	}

	// Load Images
	cardFront = new Image[NUMCARDS];
	card = new int[CARDSDEALT];

	for(int i=0;i<NUMCARDS;i++)
	    {
		cardFront[i]=getImage(getCodeBase(),(i+1)+".gif");
	    }

	 cardBack = getImage(getCodeBase(),"53.gif");
	

	// Setup GUI

	GridBagLayout gridbag = new GridBagLayout();
	GridBagConstraints c= new GridBagConstraints();

	setFont(new Font("SansSerif",Font.PLAIN,14));
	setLayout(gridbag);


	//Labels
	c.fill=GridBagConstraints.BOTH;
	c.gridwidth=  3;
	Label lblPlayer1=new Label(player1,Label.CENTER);
	gridbag.setConstraints(lblPlayer1,c);
	add(lblPlayer1);

	Label lblPlayer2=new Label(player2,Label.CENTER);
	c.gridwidth = GridBagConstraints.REMAINDER;
	gridbag.setConstraints(lblPlayer2,c);
	add(lblPlayer2);

	cardCanvas = new ImageCanvas[CARDSDEALT];
	c.gridwidth=1;

	//ImageCanvases
	for(int i=0;i<CARDSDEALT;i++)
	    {
		cardCanvas[i]= new ImageCanvas(cardBack,this,73,97);
		if(i == (CARDSDEALT-1))
		    c.gridwidth=GridBagConstraints.REMAINDER;
		
		gridbag.setConstraints(cardCanvas[i],c);
		add(cardCanvas[i]);
		
	    }



	//Score Textboxes
	txtScore1= new TextField(20);
	txtScore1.setEditable(false);
	c.gridwidth=3;
	gridbag.setConstraints(txtScore1,c);
	add(txtScore1);

	txtScore2= new TextField(20);
	txtScore2.setEditable(false);
	c.gridwidth=GridBagConstraints.REMAINDER;
	gridbag.setConstraints(txtScore2,c);
	add(txtScore2);


	//Command Buttons
	cmdDeal = new Button("Deal");
	cmdDeal.setActionCommand("DEAL");
	cmdDeal.addActionListener(this);
	c.gridwidth=2;
	gridbag.setConstraints(cmdDeal,c);
	add(cmdDeal);

	cmdShow = new Button("Show");
	cmdShow.setActionCommand("SHOW");
	cmdShow.addActionListener(this);
	cmdShow.setEnabled(false);
	c.gridwidth=2;
	gridbag.setConstraints(cmdShow,c);
	add(cmdShow);

	cmdReset = new Button("Reset");
	cmdReset.setActionCommand("RESET");
	cmdReset.addActionListener(this);
	c.gridwidth=GridBagConstraints.REMAINDER;
	gridbag.setConstraints(cmdReset,c);
	add(cmdReset);
	
	//Initialize scores
	updateScores();


    }

    // This function is used to detect if a duplicate card has been dealt
    private boolean isDupe(int index) {
	
	for(int i=0;i<CARDSDEALT;i++)
	    {
		//Need to initialize
		if(card[index]==-1)
		    return true;
		
		//Found a duplicate
		if ((card[index] == card[i]) && (i!=index)){
		    return true;
		}
	     
	    }

	//No Duplicates
	return false;

    }

    public void actionPerformed(ActionEvent e) {
	Object source=e.getSource();
	
	if (source == cmdDeal)
	    {
		//Deal button was hit
		int score=0,suit;
		
		//Initialize Cards
		for(int i=0;i<CARDSDEALT;i++)
		    {
			cardCanvas[i].setImage(cardBack);
			cardCanvas[i].repaint();
			card[i]=-1;
		    }
		
		//"Deal" Cards
		for(int i=0;i<CARDSDEALT;i++)
		    {
			
			//Check for duplicates
			while(isDupe(i)) {
			    score =(int) (1+ Math.random()*12.999);
			    suit = (int) (Math.random()*3.999);
			    card[i]=(13*suit)+score-1;
			}

			if(i < (CARDSDEALT/2)) {
			    //"Deal" to player1
			    score1=score1+score;
		
			} else {
			    //"Deal" to player2
			    score2=score2+score;
			}
		    }

		cmdDeal.setEnabled(false);
		cmdShow.setEnabled(true);
	    }
	else {
	    if (source == cmdShow) {
		//Show Button was hit

		//Update Scores and Card Images
		updateScores();
		for(int i=0;i<CARDSDEALT;i++)
		    {
			cardCanvas[i].setImage(cardFront[card[i]]);
			cardCanvas[i].repaint();
		    }
		cmdDeal.setEnabled(true);
		cmdShow.setEnabled(false);

	    } else if (source == cmdReset) {
		//Reset Button was hit
		
		//Reset Scores and Card Images
		score1=0;
		score2=0;
		updateScores();

		for(int i=0;i<CARDSDEALT;i++)
		    {
			cardCanvas[i].setImage(cardBack);
			cardCanvas[i].repaint();
		    }	
		cmdDeal.setEnabled(true);
		cmdShow.setEnabled(false);
	    }
	}
    }

    // This method is called to update the values of the score
    // textboxes.
    private void updateScores()
    {
	txtScore1.setText(""+score1);
	txtScore2.setText(""+score2);
    }

}


//This is a helper class to use for the card images

class ImageCanvas extends Canvas {

    Container  pappy;
    Image image;
    Dimension size;
    int w,h;
    boolean trueSizeKnown;
    MediaTracker tracker;

    public ImageCanvas(Image image, Container highestContainer, int initialWidth, int initialHeight) {
	if (image==null) {
	    System.err.println("Canvas got invalid image object!");
	    return;
	}

	this.image=image;
	this.pappy=highestContainer;
	w=initialWidth;
	h=initialHeight;

	tracker = new MediaTracker(this);
	tracker.addImage(image,0);

	size = new Dimension(w,h);

    }

    public Dimension getPreferredSize() {
	return getMinimumSize();
    }

    public synchronized Dimension getMinimumSize() {
	return size;
    }

    public void paint(Graphics g) {

	if( image!=null) {
	    if (!trueSizeKnown) {
		int imageWidth = image.getWidth(this);
		int imageHeight = image.getHeight(this);
		
		if(tracker.checkAll(true)) {
		    trueSizeKnown=true;
		    if (tracker.isErrorAny()) {
			System.err.println("Error Loading image: "+image);
		    }
		}
		
		
		//Component-initiated resizing.
		if(((imageWidth > 0) && (w!= imageWidth)) || ((imageHeight>0) && (h!=imageHeight))) {
		    w = imageWidth;
		    h = imageHeight;
		    size = new Dimension(w,h);
		    setSize(w,h);
		    pappy.validate();
		}
	    }
	}
	
	g.drawImage(image,0,0,this);
	g.drawRect(0,0,w-1,h-1);
    }

    public void setImage(Image image) {
	this.image=image;
	this.repaint();

    }

}