/*******************************************************************************
 * Copyright (c) 2013 Christian Pontesegger 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:
 *     Christian Pontesegger - initial API and implementation
 *******************************************************************************/
package org.eclipse.ease.ui.scripts.ui;

import java.util.HashMap;

import org.eclipse.ease.ui.scripts.handler.EditScript;
import org.eclipse.ease.ui.scripts.handler.RunScript;
import org.eclipse.ease.ui.scripts.repository.IScript;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.menus.AbstractContributionFactory;
import org.eclipse.ui.menus.CommandContributionItem;
import org.eclipse.ui.menus.CommandContributionItemParameter;
import org.eclipse.ui.menus.IContributionRoot;
import org.eclipse.ui.services.IServiceLocator;

/**
 * Provide context menu entries for macros.
 */
public class ScriptContextMenuEntries extends AbstractContributionFactory implements ISelectionChangedListener {

	private IStructuredSelection fLastSelection;

	/**
	 * Constructor.
	 *
	 * @param location
	 *            location to add factory to.
	 */
	public ScriptContextMenuEntries(final String location) {
		super(location, null);
	}

	@Override
	public final void createContributionItems(final IServiceLocator serviceLocator, final IContributionRoot additions) {

		if ((fLastSelection != null) && (!fLastSelection.isEmpty())) {

			final StringBuffer names = new StringBuffer();
			for (final Object object : fLastSelection.toArray()) {
				if (object instanceof IScript)
					names.append(((IScript) object).getPath()).append(';');
			}

			if (names.length() > 0) {
				names.deleteCharAt(names.length() - 1);
				final HashMap<String, String> parameters = new HashMap<>();

				// add "run" entry
				parameters.put(RunScript.PARAMETER_NAME, names.toString());
				final CommandContributionItemParameter contributionParameter = new CommandContributionItemParameter(serviceLocator, null, RunScript.COMMAND_ID,
						CommandContributionItem.STYLE_PUSH);
				contributionParameter.label = "Run";
				contributionParameter.visibleEnabled = true;
				contributionParameter.parameters = parameters;
				CommandContributionItem contribution = new CommandContributionItem(contributionParameter);
				additions.addContributionItem(contribution, null);

				// add separator
				additions.addContributionItem(new Separator(), null);

				// add "edit" entry
				parameters.clear();
				parameters.put(EditScript.PARAMETER_NAME, names.toString());
				contributionParameter.commandId = EditScript.COMMAND_ID;
				contributionParameter.label = "Edit";
				contribution = new CommandContributionItem(contributionParameter);
				additions.addContributionItem(contribution, null);
			}
		}
	}

	@Override
	public void selectionChanged(final SelectionChangedEvent event) {
		fLastSelection = (event.getSelection() instanceof IStructuredSelection) ? (IStructuredSelection) event.getSelection() : null;
	}
}