/*
 * Copyright (c) 2006 Borland Software Corporation
 * 
 * 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:
 *    Michael Golubev (Borland) - initial API and implementation
 */
package org.eclipse.papyrus.uml.diagram.common.parser.stereotype;

import java.text.MessageFormat;
import java.util.LinkedList;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.common.core.command.UnexecutableCommand;
import org.eclipse.gmf.runtime.common.ui.services.parser.IParserEditStatus;
import org.eclipse.gmf.runtime.common.ui.services.parser.ParserEditStatus;
import org.eclipse.gmf.runtime.emf.ui.services.parser.ISemanticParser;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.papyrus.uml.diagram.common.parser.assist.FixedSetCompletionProcessor;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.Extension;
import org.eclipse.uml2.uml.Stereotype;

public class AppliedStereotypeParser implements ISemanticParser {

	private static final MessageFormat APPLIED_PROFILE = new MessageFormat("\u00AB{0}\u00BB"); //$NON-NLS-1$

	public boolean areSemanticElementsAffected(EObject listener, Object notification) {
		if(notification instanceof Notification) {
			Object feature = ((Notification)notification).getFeature();
			if(feature instanceof EStructuralFeature) {
				EStructuralFeature featureImpl = (EStructuralFeature)feature;
				return featureImpl.getName().startsWith(Extension.METACLASS_ROLE_PREFIX);
			}
		}
		return false;
	}

	public List<?> getSemanticElementsBeingParsed(EObject eObject) {
		Element element = (Element)eObject;
		List<EObject> result = new LinkedList<EObject>();
		// result.add(element);
		result.addAll(element.getStereotypeApplications());
		return result;
	}

	public IContentAssistProcessor getCompletionProcessor(IAdaptable subject) {
		Element element = doAdapt(subject);
		List<Stereotype> remaining = new LinkedList<Stereotype>();
		remaining.addAll(element.getApplicableStereotypes());
		remaining.removeAll(element.getAppliedStereotypes());

		List<String> names = new LinkedList<String>();
		for(Stereotype next : remaining) {
			names.add(next.getName());
		}
		return new FixedSetCompletionProcessor(names);
	}

	public String getEditString(IAdaptable element, int flags) {
		Element subject = doAdapt(element);
		List<Stereotype> stereos = subject.getAppliedStereotypes();
		if(stereos.isEmpty()) {
			return ""; //$NON-NLS-1$
		}
		StringBuffer result = new StringBuffer();
		for(Stereotype next : stereos) {
			if(result.length() > 0) {
				result.append(", "); //$NON-NLS-1$
			}
			result.append(next.getName());
		}
		return result.toString();
	}

	public ICommand getParseCommand(IAdaptable element, String newString, int flags) {
		return UnexecutableCommand.INSTANCE;
	}

	public String getPrintString(IAdaptable element, int flags) {
		String editString = getEditString(element, flags);
		return editString == null || editString.length() == 0 ? editString : APPLIED_PROFILE.format(new Object[]{ editString });
	}

	public boolean isAffectingEvent(Object event, int flags) {
		return false;
	}

	public IParserEditStatus isValidEditString(IAdaptable element, String editString) {
		return ParserEditStatus.UNEDITABLE_STATUS;
	}

	private Element doAdapt(IAdaptable adaptable) {
		Element element = (Element)adaptable.getAdapter(EObject.class);
		return element;
	}

}