/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution 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.
 *
 *   logisim-evolution 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 logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :
 *     + Haute École Spécialisée Bernoise
 *       http://www.bfh.ch
 *     + Haute École du paysage, d'ingénierie et d'architecture de Genève
 *       http://hepia.hesge.ch/
 *     + Haute École d'Ingénierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/

package com.cburch.logisim.gui.appear;

import java.util.HashMap;
import java.util.Map;

import com.cburch.draw.actions.ModelAction;
import com.cburch.draw.model.CanvasObject;
import com.cburch.draw.undo.Action;
import com.cburch.logisim.circuit.Circuit;
import com.cburch.logisim.circuit.CircuitMutator;
import com.cburch.logisim.circuit.CircuitTransaction;
import com.cburch.logisim.circuit.appear.AppearanceElement;
import com.cburch.logisim.proj.Project;

public class CanvasActionAdapter extends com.cburch.logisim.proj.Action {
	private class ActionTransaction extends CircuitTransaction {
		private boolean forward;

		ActionTransaction(boolean forward) {
			this.forward = forward;
		}

		@Override
		protected Map<Circuit, Integer> getAccessedCircuits() {
			Map<Circuit, Integer> accessMap = new HashMap<Circuit, Integer>();
			for (Circuit supercirc : circuit.getCircuitsUsingThis()) {
				accessMap.put(supercirc, READ_WRITE);
			}
			return accessMap;
		}

		@Override
		protected void run(CircuitMutator mutator) {
			if (forward) {
				canvasAction.doIt();
			} else {
				canvasAction.undo();
			}
		}

	}

	private Circuit circuit;
	private Action canvasAction;

	private boolean wasDefault;

	public CanvasActionAdapter(Circuit circuit, Action action) {
		this.circuit = circuit;
		this.canvasAction = action;
	}

	private boolean affectsPorts() {
		if (canvasAction instanceof ModelAction) {
			for (CanvasObject o : ((ModelAction) canvasAction).getObjects()) {
				if (o instanceof AppearanceElement) {
					return true;
				}
			}
		}
		return false;
	}

	@Override
	public void doIt(Project proj) {
		wasDefault = circuit.getAppearance().isDefaultAppearance();
		if (affectsPorts()) {
			ActionTransaction xn = new ActionTransaction(true);
			xn.execute();
		} else {
			canvasAction.doIt();
		}
	}

	@Override
	public String getName() {
		return canvasAction.getName();
	}

	@Override
	public void undo(Project proj) {
		if (affectsPorts()) {
			ActionTransaction xn = new ActionTransaction(false);
			xn.execute();
		} else {
			canvasAction.undo();
		}
		circuit.getAppearance().setDefaultAppearance(wasDefault);
	}
}