/*******************************************************************************
 * Copyright (c) 2007 IBM Corporation and Others
 * 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:
 *    Kentarou FUKUDA - initial API and implementation
 *******************************************************************************/
package org.eclipse.actf.model.ui.editor.actions;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.eclipse.actf.model.internal.ui.FavoritesChangeEvent;
import org.eclipse.actf.model.internal.ui.FavoritesChangeListener;
import org.eclipse.actf.model.internal.ui.FavoritesUtil;
import org.eclipse.actf.model.internal.ui.editor.actions.AddFavoritesAction;
import org.eclipse.actf.model.internal.ui.editor.actions.ArrangeFavoritesAction;
import org.eclipse.actf.model.internal.ui.editor.actions.FavoritesItemAction;
import org.eclipse.actf.model.ui.util.ModelServiceMessages;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.ui.IWorkbenchWindow;

/**
 * MenuManager for favorites control
 */
public class FavoritesMenu extends MenuManager implements
		FavoritesChangeListener {

	private IWorkbenchWindow _window;

	private List<String> _favoritesItemIdList = new ArrayList<String>();

	private boolean useExistingEditor;

	/**
	 * Constructor of MenuManager. If user selects favorite item, open with new
	 * Editor window.
	 * 
	 * @param window
	 *            target {@link IWorkbenchWindow}
	 */
	public FavoritesMenu(IWorkbenchWindow window) {
		this(window, false);
	}

	/**
	 * Constructor of MenuManager
	 * 
	 * @param window
	 *            target {@link IWorkbenchWindow}
	 * @param useExistingEditor
	 *            if true, use existing editor to open selected favorite item
	 */
	public FavoritesMenu(IWorkbenchWindow window, boolean useExistingEditor) {
		super(ModelServiceMessages.MenuConst_F_avorites_8);
		this._window = window;

		this.useExistingEditor = useExistingEditor;

		Map<String, String> favoritesMap = FavoritesUtil.getFavoritesMap();

		AddFavoritesAction favoritesAddAction = new AddFavoritesAction(window,
				favoritesMap);
		add(favoritesAddAction);
		favoritesAddAction.addFavoritesChangeListener(this);

		ArrangeFavoritesAction favoritesArrangeAction = new ArrangeFavoritesAction(
				this._window, favoritesMap);
		add(favoritesArrangeAction);
		favoritesArrangeAction.addFavoritesChangeListener(this);

		add(new Separator());

		updateAllFavoritesItems(favoritesMap);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.actf.model.internal.ui.FavoritesChangeListener#favoritesChanged(org.eclipse.actf.model.internal.ui.FavoritesChangeEvent)
	 */
	public void favoritesChanged(FavoritesChangeEvent fce) {
		updateAllFavoritesItems(fce.getFavoritesMap());
	}

	private void updateAllFavoritesItems(Map<String, String> favoritesMap) {
		Iterator<String> favoritesIt = favoritesMap.keySet().iterator();

		removeAllFavoritesItemAction();
		while (favoritesIt.hasNext()) {
			String name = favoritesIt.next();
			String url = favoritesMap.get(name);
			addFavoritesItemAction(name, url);
		}

		FavoritesUtil.saveFavoritesMap(favoritesMap);
	}

	private void removeAllFavoritesItemAction() {
		for (int i = 0; i < this._favoritesItemIdList.size(); i++) {
			remove(this._favoritesItemIdList.get(i));
		}
		this._favoritesItemIdList.clear();
	}

	private void addFavoritesItemAction(String name, String url) {
		FavoritesItemAction favoritesItemAction = new FavoritesItemAction(
				this._window, name, url, useExistingEditor);
		add(favoritesItemAction);
		this._favoritesItemIdList.add(FavoritesItemAction.ID + "_" + name); //$NON-NLS-1$
	}

}