import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class MemoryGame extends JApplet  {
	// you will not need these anymore
//	private int row;
//	private int column;
//	private MemoryCard [] pictureButton = new MemoryCard [20];
	// no need to make this one an instance variable.. let it disappear when constructor is done
	// ArrayList to hold the MemoryCard
//	ArrayList<MemoryCard> cardList = new ArrayList<MemoryCard>();
	String[] imageFile = {"file1.png", "file2.png", "file3.png","file4.png", "file5.png", "file6.png",
			"file7.png", "file8.png", "file9.png", "file10.png"};
//	static int lcv = 0;
	private JLabel pictureViewerLabel;

	// to remember last call
	MemoryCard firstChoice, secondChoice;
	// number turned up
	int nbMatched;

	public void init() {
		setSize(600, 500);
		setLayout(new BorderLayout());

		// Create 3 panels
		JPanel northPanel = new JPanel();
		JLabel titleLabel = new JLabel("Memory");
		titleLabel.setFont(new Font("Curlz MT", Font.PLAIN, 40));
		northPanel.add(titleLabel);

		JPanel gamePanel = new JPanel();
		gamePanel.setLayout(new GridLayout(4, 0));
		ArrayList<MemoryCard> cardList = new ArrayList<MemoryCard>();
		// now we use the lenght of the imageFile times 2
		for(int lcv = 0; lcv < imageFile.length * 2; lcv++)
			cardList.add(new MemoryCard(imageFile[lcv/2]));

		Random ran = new Random();
		while(cardList.size() > 0) {
			int randomCounter = ran.nextInt(cardList.size());
			gamePanel.add(cardList.remove(randomCounter));
		}

		JPanel southPanel = new JPanel();
		southPanel.setLayout(new GridLayout(2,0));
		JLabel counterLabel = new JLabel("Number of moves: ");
		counterLabel.setFont(new Font("Curlz MT", Font.PLAIN, 20));
		JTextArea directions = new JTextArea("Directions: \n1. Turn two cards" +
				" picture-side-up by clicking on the cards.  \n2. Make matches by selecting" +
				" two identical cards.  \n3. Try to match all the cards in as few moves as" +
				" possible.  \n4. HAVE FUN!", 5, 25);
		directions.setFont(new Font("Bookman Old Style", Font.PLAIN, 17));
		directions.setLineWrap(true);
		directions.setWrapStyleWord(true);
		directions.setEditable(false);
		southPanel.add(directions);
		counterLabel.setHorizontalTextPosition(SwingConstants.LEFT);
		southPanel.add(counterLabel);

		// Color the panels so I can see them
		//northPanel.setBackground(Color.YELLOW);
		//gamePanel.setBackground(Color.MAGENTA);
		//southPanel.setBackground(Color.CYAN);

		//Add 1 panel to the NORTH section and the 2nd to the CENTER section
		this.add(northPanel, BorderLayout.NORTH);
		this.add(gamePanel, BorderLayout.CENTER);
		this.add(southPanel, BorderLayout.SOUTH);


		// I move the listener back to MemoryCode because the code will be
		// longer and it becomes messy and hard to read		
//		for (lcv = 0; lcv < pictureButton.length; lcv++) {
//		pictureButton[lcv].addActionListener(new ActionListener() {
//		public void actionPerformed(ActionEvent evt) {
//		String filename = ((MemoryCard)(evt.getSource())).getFile();
//		((MemoryCard)(evt.getSource())).setIcon(new ImageIcon(filename));
//		}
//		});
	}


	class MemoryCard extends JButton implements ActionListener {
		ImageIcon icon;
		String file;

		MemoryCard(String filename) {
			super();
			file = filename;
			icon = new ImageIcon(filename);
		}
//		no need for that we are playing with it internally
//		String getFile(){
//		return file;
//		}

		public void actionPerformed(ActionEvent arg0) {

			// if the button displays its Icon it is because it
			// has already be turned on so ignore it
			if(this.getIcon() != null)
				return;

			// if the secondChoice has already be turned on the user
			// try on a third button (or play too fast)
			if(secondChoice != null)
				return;
			
			// ok is it first choice or second choice
			// in both case I will display my image
			setIcon(icon);		// turn on image
			
			// test first choice first
			if(firstChoice == null) {
				firstChoice = this;	// remember selection
				return;
			}
			
			// ok so it is secondChoice
			// is there a match
			if(file == firstChoice.file) {
				firstChoice = null;
				nbMatched++;
				// test if we are done
				if(nbMatched == imageFile.length) {
					// do here what ever you want to do when the game 
					// is over
				}
				return;
			}
			// OK remember this as second choice
			secondChoice = this;
			// sleep 2 seconds
			try {
				Thread.sleep(2000);
			}
			catch(Exception e) {
			}
			// display back the plain button
			firstChoice.setIcon(null);
			setIcon(null);
			// flag no selection made yet
			firstChoice = secondChoice = null;

		}
	}
}