/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester
 *
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1 of
 *  the License, or (at your option) any later version.
 *
 *  This program 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package net.sf.taverna.t2.workbench.ui.servicepanel.menu;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JPopupMenu;

import net.sf.taverna.t2.servicedescriptions.ConfigurableServiceProvider;
import net.sf.taverna.t2.servicedescriptions.ServiceDescription;
import net.sf.taverna.t2.servicedescriptions.ServiceDescriptionProvider;
import net.sf.taverna.t2.servicedescriptions.ServiceDescriptionRegistry;
import net.sf.taverna.t2.workbench.ui.servicepanel.ServicePanel;
import net.sf.taverna.t2.workbench.ui.servicepanel.actions.AddServiceProviderAction;

/**
 * A menu that provides a set up menu actions for adding new service providers
 * to the Service Panel.
 * <p>
 * The Actions are discovered from the {@link ServiceDescriptionProvider}s found
 * through the SPI.
 *
 * @author Stuart Owen
 * @author Stian Soiland-Reyes
 * @author Alan R Williams
 *
 * @see ServiceDescription
 * @see ServicePanel
 * @see ServiceDescriptionRegistry#addServiceDescriptionProvider(ServiceDescriptionProvider)
 */
@SuppressWarnings("serial")
public class AddServiceProviderMenu extends JButton {
	public static class ServiceProviderComparator implements
			Comparator<ServiceDescriptionProvider> {
		@Override
		public int compare(ServiceDescriptionProvider o1,
				ServiceDescriptionProvider o2) {
			return o1.getName().toLowerCase().compareTo(
					o2.getName().toLowerCase());
		}
	}

	private final static String ADD_SERVICE_PROVIDER_MENU_NAME = "Import new services";

	private final ServiceDescriptionRegistry serviceDescriptionRegistry;

	public AddServiceProviderMenu(ServiceDescriptionRegistry serviceDescriptionRegistry) {
		super();
		this.serviceDescriptionRegistry = serviceDescriptionRegistry;

		final Component c = createCustomComponent();
		setAction(new AbstractAction(ADD_SERVICE_PROVIDER_MENU_NAME) {
			@Override
			public void actionPerformed(ActionEvent e) {
				((JPopupMenu) c).show(AddServiceProviderMenu.this, 0,
						AddServiceProviderMenu.this.getHeight());
			}
		});
	}

	private Component createCustomComponent() {
		JPopupMenu addServiceMenu = new JPopupMenu(
				ADD_SERVICE_PROVIDER_MENU_NAME);
		addServiceMenu.setToolTipText("Add a new service provider");
		boolean isEmpty = true;
		List<ConfigurableServiceProvider> providers = new ArrayList<>(
				serviceDescriptionRegistry.getUnconfiguredServiceProviders());
		Collections.sort(providers,  new ServiceProviderComparator());
		for (ConfigurableServiceProvider provider : providers) {
			/*
			 * Skip BioCatalogue's ConfigurableServiceProviderS as they should
			 * not be used to add servcie directlry but rather though the
			 * Service Catalogue perspective
			 */
			if (provider.getId().toLowerCase().contains("servicecatalogue"))
				continue;

			AddServiceProviderAction addAction = new AddServiceProviderAction(
					provider, this);
			addAction.setServiceDescriptionRegistry(serviceDescriptionRegistry);
			addServiceMenu.add(addAction);
			isEmpty = false;
		}
		if (isEmpty)
			addServiceMenu.setEnabled(false);
		return addServiceMenu;
	}
}