/*******************************************************************************
 * Copyright (c) 2011, 2013 Formal Mind GmbH and University of Dusseldorf.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Lukas Ladenberger - initial API and implementation
 ******************************************************************************/
package org.eclipse.rmf.reqif10.pror.editor.agilegrid;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.agilemore.agilegrid.AgileGrid;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.rmf.reqif10.AttributeValueXHTML;
import org.eclipse.rmf.reqif10.ReqIF10Factory;
import org.eclipse.rmf.reqif10.ReqIF10Package;
import org.eclipse.rmf.reqif10.XhtmlContent;
import org.eclipse.rmf.reqif10.pror.editor.preferences.PreferenceConstants;
import org.eclipse.rmf.reqif10.pror.editor.presentation.Reqif10EditorPlugin;
import org.eclipse.rmf.reqif10.pror.util.ProrXhtmlSimplifiedHelper;
import org.eclipse.rmf.reqif10.xhtml.XhtmlDivType;
import org.eclipse.swt.widgets.Display;

/**
 * @author Lukas Ladenberger
 */
public class ProrXhtmlSimplifiedCellEditor extends ProrCellEditor {
	
	private AttributeValueXHTML attributeValue;

	public ProrXhtmlSimplifiedCellEditor(AgileGrid agileGrid,
			EditingDomain editingDomain, Object parent,
			Object affectedObject) {
		super(agileGrid, editingDomain, parent, affectedObject);
		this.parent = parent;
	}

	@Override
	protected Object doGetValue() {
		
		// The formatted text is edited		
		XhtmlDivType div = ProrXhtmlSimplifiedHelper
				.stringToSimplifiedXhtml(text.getText());
		
		XhtmlContent origTheValue = attributeValue.getTheValue();
		
		final List<? super Object> affectedObjects = new ArrayList<Object>();
		affectedObjects.add(affectedObject);
		
		CompoundCommand compoundCommand = new CompoundCommand() {
			@Override
			public Collection<?> getAffectedObjects() {
				return affectedObjects;
			}
		};

		// Set parent if necessary
		if (attributeValue.eContainer() == null) {
			compoundCommand
					.append(AddCommand
							.create(editingDomain,
									parent,
									ReqIF10Package.Literals.SPEC_ELEMENT_WITH_ATTRIBUTES__VALUES,
									attributeValue));
		}

		if (!attributeValue.isSimplified()) {

			boolean formattedAttribute = ProrXhtmlSimplifiedHelper
					.isFormattedAttribute(origTheValue);

			if (formattedAttribute) {

				// Comand for setting simplified flag
				Command setSimplifiedCmd = SetCommand
						.create(editingDomain,
								attributeValue,
								ReqIF10Package.Literals.ATTRIBUTE_VALUE_XHTML__SIMPLIFIED,
								true);

				compoundCommand.append(setSimplifiedCmd);

				XhtmlContent xhtmlContentCopy = EcoreUtil.copy(origTheValue);

				// Comand for setting original value
				Command setTheOriginalValueCmd = SetCommand
						.create(editingDomain,
								attributeValue,
								ReqIF10Package.Literals.ATTRIBUTE_VALUE_XHTML__THE_ORIGINAL_VALUE,
								xhtmlContentCopy);

				compoundCommand.append(setTheOriginalValueCmd);

				// Notify user about potential information loss
				if (!Reqif10EditorPlugin
						.getPlugin()
						.getPreferenceStore()
						.getBoolean(
								PreferenceConstants.P_STOP_IS_SIMPLIFIED_WARNING)) {
					MessageDialog
							.openInformation(
									Display.getDefault().getActiveShell(),
									"Information",
									Reqif10EditorPlugin.INSTANCE
											.getString("_UI_Reqif10XhtmlIsSimplifiedWarning"));
				}

			}

		}

		// Command for setting new simplified version
		Command setTheValueCmd = SetCommand.create(editingDomain,
				origTheValue,
				ReqIF10Package.Literals.XHTML_CONTENT__XHTML, div);
		
		compoundCommand.append(setTheValueCmd);
		editingDomain.getCommandStack().execute(compoundCommand);

		return attributeValue;

	}

	@Override
	protected void doSetValue(Object value) {
		this.attributeValue = null;
		if (value instanceof AttributeValueXHTML) {
			attributeValue = (AttributeValueXHTML) value;
			XhtmlContent xhtmlContent = attributeValue.getTheValue();
			if (xhtmlContent == null) {
				xhtmlContent = ReqIF10Factory.eINSTANCE.createXhtmlContent();
				Command setTheOriginalValueCmd = SetCommand
						.create(editingDomain,
								attributeValue,
								ReqIF10Package.Literals.ATTRIBUTE_VALUE_XHTML__THE_VALUE,
								xhtmlContent);
				editingDomain.getCommandStack().execute(setTheOriginalValueCmd);
			}
			value = ProrXhtmlSimplifiedHelper
					.xhtmlToSimplifiedString(xhtmlContent);
		}
		super.doSetValue(value);
	}

}