/*******************************************************************************
 * Copyright (c) 2008, 2012 Obeo.
 * 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:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.emf.eef.codegen.services;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.eef.components.PropertiesEditionComponent;
import org.eclipse.emf.eef.components.PropertiesEditionContext;
import org.eclipse.emf.eef.mapping.ElementBindingReference;
import org.eclipse.emf.eef.views.View;

/**
 * @author <a href="mailto:william.piers@obeo.fr">William Piers</a>
 * @since 1.1
 */
public class PluginService {

	public List<List<EObject>> getPluginTabs(EObject arg0) {
		List<String> keys = new ArrayList<String>();
		List<List<EObject>> res = new ArrayList<List<EObject>>();
		PropertiesEditionContext editionContext = (PropertiesEditionContext)arg0;
		for (Iterator<EObject> iterator = editionContext.eAllContents(); iterator.hasNext();) {
			EObject o = (EObject)iterator.next();
			if (o instanceof PropertiesEditionComponent) {
				PropertiesEditionComponent pec = (PropertiesEditionComponent)o;
				for (View view : getInvolvedViews(pec)) {
					String key = getViewKey(view, pec);
					if (!keys.contains(key)) {
						List<EObject> entry = new ArrayList<EObject>();
						entry.add(view);
						entry.add(pec);
						res.add(entry);
						keys.add(key);
					}
				}
			}
		}
		return res;
	}

	private Set<View> getInvolvedViews(PropertiesEditionComponent pec) {
		Set<View> res = new LinkedHashSet<View>();
		res.addAll(pec.getViews());
		for (ElementBindingReference rb : pec.getReferencedBinding()) {
			res.addAll(rb.getBinding().getViews());
		}
		return res;
	}

	private String getViewKey(View view, PropertiesEditionComponent pec) {
		if (view.getName().equals(pec.getName())) {
			// or view.eInverse()->first().oclIsTypeOf(views::ViewReference)) // TODO recode condition
			return "Base";
		} else {
			return view.getName();
		}
	}

}