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

//public class SlidingGUI extends JFrame implements ActionListener, IPlayer {
public class SlidingGUI extends JFrame implements ActionListener {
    private JButton tile[] = new JButton[7];
    private JButton reset = new JButton("Reset");
    private SlidingTilePuzzle sliding;
    private String puzzleState;
    private Label label;
    private String prompt = "Goal: [LLL RRR]. " +
	" Click on the tile you want to move." +
	" Illegal moves are ignored.";
    public SlidingGUI(String title) {
        sliding = new SlidingTilePuzzle();
	//        sliding = new SlidingTilePuzzle(this);
        buildGUI();
        setTitle(title);
        pack();
        setVisible(true);
    }
    private void buildGUI() {
        Container contentPane = getContentPane();
        contentPane.setLayout(new BorderLayout());
        JPanel buttons = new JPanel();
        puzzleState = sliding.reportGameState();
       
        for (int k = 0; k < tile.length; k++) {
            tile[k] = new JButton(""+puzzleState.charAt(k));
            tile[k].addActionListener(this);
            buttons.add(tile[k]);
        }
        reset.addActionListener(this);
        label = new Label(prompt);
        buttons.add(reset);
        contentPane.add("Center", buttons);
        contentPane.add("South", label);
    }
    private void labelButtons(String s) {
        for (int k = 0; k < tile.length; k++)
            tile[k].setText(""+ s.charAt(k));
    }
    public void actionPerformed(ActionEvent e) {
        String result = "";
        if (e.getSource() == reset) {
            sliding = new SlidingTilePuzzle();
	    //            sliding = new SlidingTilePuzzle(this);
            puzzleState = sliding.reportGameState();
            labelButtons(puzzleState);
            label.setText(prompt);
	}
        for (int k = 0; k < tile.length; k++)
            if (e.getSource() == tile[k])
		result = ((GUIPlayableGame)sliding).submitUserMove(""+ k);
        if (result.indexOf("illegal") != -1)
            java.awt.Toolkit.getDefaultToolkit().beep();
        puzzleState = sliding.reportGameState();
        labelButtons(puzzleState);
        if (sliding.gameOver()) {
            label.setText("You did it! Very nice!");
	}
    }
    public String makeAMove(String prompt){ return ""; }

    public static void main(String args[]) {
        new SlidingGUI("Sliding Tile Puzzle");
    }
}