import java.awt.*;

public class StoneView extends Panel {
  StoneModel model;
  int nextSide = -1;
  
  public StoneView(int size) {
    model = new StoneModel(size);
  }
  
  public void init() {
    setBackground(Color.black);
    setLayout(new GridLayout(model.getSize(), model.getSize()));    
    for (int y = 0; y < model.getSize(); y++)
      for (int x = 0; x < model.getSize(); x++)
	makeFieldView(x, y);
    newGame();
  }
  
  protected final StoneFieldView makeFieldView(int x, int y) {
    StoneFieldView field = new StoneFieldView(x, y);
    add(field, y * model.getSize() + x);
    return field;
  }
  
  public StoneFieldView getFieldView(int x, int y) {
    return (StoneFieldView) getComponent(y * model.getSize() + x);
  }
  
  public StoneModel getModel() {
    return model;
  }
  
  public int getSide() {
    return nextSide;
  }
  
  public void clicked(StoneFieldView sf) {
    StoneModel oldModel = new StoneModel(model);
    int x = sf == null? 0 : sf.getX();
    int y = sf == null? 0 : sf.getY();
    
    if (model.makeMove(x, y, parentControler().getPlayer(), nextSide)) {
      nextSide *= -1;
      parentControler().status(nextSide == StoneModel.RED? 
			       "Red turn" : "Blue turn", StoneModel.FREE);
      if (parentControler().getPlayer() > 0)
	parentControler().status(StoneModel.playerNames[parentControler().getPlayer()] + " thinking", StoneModel.FREE);
    } else {
      model = oldModel;
      parentControler().status("Impossible move", StoneModel.FREE);
    };
    updateStoneView(oldModel, model, true);
    if (model.isGameOver())
      parentControler().status(StoneModel.playerNames[parentControler().getPlayer(model.getRed() > model.getBlue()? StoneModel.RED : StoneModel.BLUE)] + " won!", StoneModel.FREE);
    parentControler().status(Integer.toString(model.getRed()), StoneModel.RED);
    parentControler().status(Integer.toString(model.getBlue()), StoneModel.BLUE);
  }
	
  protected void updateStoneView(StoneModel s1, StoneModel s2, boolean boom) {
    for (int x = 0; x < model.getSize(); x++) 
      for (int y = 0; y < model.getSize(); y++)
	if ((s1.getSum(x, y) != s2.getSum(x, y) &&
	     s1.getSum(x, y) * s2.getSum(x, y) <= 0) || 
	    s1.isRockOn(x, y) != s2.isRockOn(x, y))
	  getFieldView(x, y).dirty(boom);
  }
  
  public boolean handleEvent(Event  evt) {
    if (evt.target instanceof StoneFieldView && evt.id == Event.MOUSE_UP) {
      if (model.isGameOver()) {
	parentControler().status("Start a new game", StoneModel.FREE);
	return true;
      };
      clicked((StoneFieldView) evt.target);
      return true;
    };
    return false;
  }
  
  public void newGame() {
    StoneModel oldModel = model;
    model = new StoneModel(oldModel.getSize());
    updateStoneView(oldModel, model, false);
    nextSide = -1;
    parentControler().status("RED", StoneModel.RED);
    parentControler().status("BLUE", StoneModel.BLUE);
    parentControler().status("Select players and go!", StoneModel.FREE);
  }
  
  protected final Stones parentControler() {
    return (Stones) getParent();
  }
}