/*******************************************************************************
 * Solitaire
 *  
 *  Copyright (C) 2016-2024 by Martin P. Robillard
 *  
 *  See: https://github.com/prmr/Solitaire
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 *******************************************************************************/
package ca.mcgill.cs.stg.solitaire.gui;

import ca.mcgill.cs.stg.solitaire.cards.Card;
import ca.mcgill.cs.stg.solitaire.model.GameModel;
import ca.mcgill.cs.stg.solitaire.model.GameModelListener;
import javafx.geometry.Insets;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;

/**
 * Component that shows the state of the discard pile and allows dragging
 * cards from it.
 */
class DiscardPileView extends HBox implements GameModelListener
{
	private static final int PADDING = 5;
	private CardDragHandler aDragHandler;
	private final GameModel aModel;
	
	DiscardPileView(GameModel pModel)
	{
		aModel = pModel;
		setPadding(new Insets(PADDING));
    	final ImageView image = new ImageView(CardImages.imageForBackOfCard());
    	image.setVisible(false);
       	getChildren().add(image);
    	aDragHandler = new CardDragHandler(image);
    	image.setOnDragDetected(aDragHandler);
    	aModel.addListener(this);
	}
	
	@Override
	public void gameStateChanged()
	{
		if( aModel.isDiscardPileEmpty())
		{
			getChildren().get(0).setVisible(false);
		}
		else
		{
			getChildren().get(0).setVisible(true);
			Card topCard = aModel.peekDiscardPile();
			ImageView image = (ImageView)getChildren().get(0);
			image.setImage(CardImages.imageFor(topCard));
			aDragHandler.setCard(topCard);
		}
	}
}