/*******************************************************************************
 * 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.gui;

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

import com.cburch.draw.actions.ModelChangeAttributeAction;
import com.cburch.draw.canvas.Canvas;
import com.cburch.draw.canvas.Selection;
import com.cburch.draw.canvas.SelectionEvent;
import com.cburch.draw.canvas.SelectionListener;
import com.cburch.draw.model.AttributeMapKey;
import com.cburch.draw.model.CanvasModel;
import com.cburch.draw.model.CanvasObject;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.AttributeSet;
import com.cburch.logisim.gui.generic.AttrTableSetException;
import com.cburch.logisim.gui.generic.AttributeSetTableModel;

class AttrTableSelectionModel extends AttributeSetTableModel implements
		SelectionListener {
	private Canvas canvas;

	public AttrTableSelectionModel(Canvas canvas) {
		super(new SelectionAttributes(canvas.getSelection()));
		this.canvas = canvas;
		canvas.getSelection().addSelectionListener(this);
	}

	@Override
	public String getTitle() {
		Selection sel = canvas.getSelection();
		Class<? extends CanvasObject> commonClass = null;
		int commonCount = 0;
		CanvasObject firstObject = null;
		int totalCount = 0;
		for (CanvasObject obj : sel.getSelected()) {
			if (firstObject == null) {
				firstObject = obj;
				commonClass = obj.getClass();
				commonCount = 1;
			} else if (obj.getClass() == commonClass) {
				commonCount++;
			} else {
				commonClass = null;
			}
			totalCount++;
		}

		if (firstObject == null) {
			return null;
		} else if (commonClass == null) {
			return Strings.get("selectionVarious", "" + totalCount);
		} else if (commonCount == 1) {
			return Strings.get("selectionOne", firstObject.getDisplayName());
		} else {
			return Strings.get("selectionMultiple",
					firstObject.getDisplayName(), "" + commonCount);
		}
	}

	//
	// SelectionListener method
	//
	public void selectionChanged(SelectionEvent e) {
		fireTitleChanged();
	}

	@Override
	public void setValueRequested(Attribute<Object> attr, Object value)
			throws AttrTableSetException {
		SelectionAttributes attrs = (SelectionAttributes) getAttributeSet();
		Map<AttributeMapKey, Object> oldVals;
		oldVals = new HashMap<AttributeMapKey, Object>();
		Map<AttributeMapKey, Object> newVals;
		newVals = new HashMap<AttributeMapKey, Object>();
		for (Map.Entry<AttributeSet, CanvasObject> ent : attrs.entries()) {
			AttributeMapKey key = new AttributeMapKey(attr, ent.getValue());
			oldVals.put(key, ent.getKey().getValue(attr));
			newVals.put(key, value);
		}
		CanvasModel model = canvas.getModel();
		canvas.doAction(new ModelChangeAttributeAction(model, oldVals, newVals));
		fireTitleChanged();
	}
}