/*******************************************************************************
 * 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.draw.actions;

import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import com.cburch.draw.model.AttributeMapKey;
import com.cburch.draw.model.CanvasModel;
import com.cburch.draw.model.CanvasObject;
import com.cburch.logisim.data.Attribute;

public class ModelChangeAttributeAction extends ModelAction {
	private Map<AttributeMapKey, Object> oldValues;
	private Map<AttributeMapKey, Object> newValues;
	private Attribute<?> attr;

	public ModelChangeAttributeAction(CanvasModel model,
			Map<AttributeMapKey, Object> oldValues,
			Map<AttributeMapKey, Object> newValues) {
		super(model);
		this.oldValues = oldValues;
		this.newValues = newValues;
	}

	@Override
	void doSub(CanvasModel model) {
		model.setAttributeValues(newValues);
	}

	@Override
	public String getName() {
		Attribute<?> a = attr;
		if (a == null) {
			boolean found = false;
			for (AttributeMapKey key : newValues.keySet()) {
				Attribute<?> at = key.getAttribute();
				if (found) {
					if (a == null ? at != null : !a.equals(at)) {
						a = null;
						break;
					}
				} else {
					found = true;
					a = at;
				}
			}
			attr = a;
		}
		if (a == null) {
			return Strings.get("actionChangeAttributes");
		} else {
			return Strings.get("actionChangeAttribute", a.getDisplayName());
		}
	}

	@Override
	public Collection<CanvasObject> getObjects() {
		Set<CanvasObject> ret = new HashSet<CanvasObject>();
		for (AttributeMapKey key : newValues.keySet()) {
			ret.add(key.getObject());
		}
		return ret;
	}

	@Override
	void undoSub(CanvasModel model) {
		model.setAttributeValues(oldValues);
	}
}