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

public class PegGraphics extends Panel implements ActionListener, MouseListener {

  Stack path=new Stack();
  PegGame root, curRoot;
  int depth=4;
  int maxDesc=30;
  
  Button upBtn;

  public static void main(String[] args) {
    Frame f = new Frame("Peg Game Graphics");
    PegGraphics pgg = new PegGraphics();
    f.add(pgg);
    f.setSize(1000, 600);
    f.show();
  }
  
  public PegGraphics() {
    System.out.println("Computing tree...");
    root = PegGame.getRoot();
    root.createAllChildren();
    curRoot = root;
    addMouseListener(this);
    setLayout(new BorderLayout());
    upBtn = new Button("Up");
    upBtn.addActionListener(this);
    //add(upBtn, "North");
  }
  
  public void paint(Graphics g) {
    curRoot.draw(g, getSize().width, getSize().height, depth);
  }
  
  public void actionPerformed(ActionEvent e) {
    if (!path.isEmpty()) {
      curRoot = (PegGame)path.pop();
      repaint();
    }
  }
  
  public void mouseClicked(MouseEvent e) {
    PegGame tmp = curRoot.getPegGameAt(e.getPoint(), getSize().width, getSize().height, depth);
    if (tmp != null && !tmp.equals(curRoot)) {
      Vector v = curRoot.pathTo(tmp, depth);
      if (v != null) { // shouldn't be...
        for(int i=v.size()-1; i>0; i--) path.push(v.elementAt(i));
      }
      curRoot = tmp;
      /*
      depth = 2;
      while(depth < 8 && curRoot.leafCount(depth) < maxDesc) depth++;
      */
      repaint();
    }
    else if (tmp.equals(curRoot)) {
      if (!path.isEmpty()) {
        curRoot = (PegGame)path.pop();
        repaint();
      }
    }
  }
  
  public void mousePressed(MouseEvent e) { }
  public void mouseReleased(MouseEvent e) { }
  public void mouseEntered(MouseEvent e) { }
  public void mouseExited(MouseEvent e) { }

}