/*****************************************************************************
 * Copyright (c) 2013, 2017 CEA LIST 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:
 *   CEA LIST - Initial API and implementation
 *   Eike Stepper (CEA) - bug 466520
 *****************************************************************************/
package org.eclipse.papyrus.cdo.internal.ui.handlers;

import java.util.List;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IContainer;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.eresource.CDOResourceNode;
import org.eclipse.emf.cdo.explorer.CDOExplorerUtil;
import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
import org.eclipse.emf.cdo.util.CDOURIUtil;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.emf.common.util.URI;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.papyrus.cdo.internal.ui.views.DIModel;
import org.eclipse.papyrus.cdo.internal.ui.views.DIResourceQuery;
import org.eclipse.papyrus.cdo.internal.ui.wizards.ModelExportWizard;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;

import com.google.common.collect.Lists;

/**
 * This is the ExportModelHandler type. Enjoy.
 */
public class ExportModelHandler extends AbstractHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {

		ISelection selection = HandlerUtil.getCurrentSelection(event);
		if (selection instanceof IStructuredSelection) {
			IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);

			if (window != null) {
				exportModels(window, null, (IStructuredSelection) selection);
			}
		}

		return null;
	}

	public static void exportModels(IWorkbenchWindow window, IContainer destination, IStructuredSelection selection) {
		ModelExportWizard wizard = new ModelExportWizard();
		wizard.init(window.getWorkbench(), selection);
		wizard.setInitialDestination(destination);

		new WizardDialog(window.getShell(), wizard).open();
	}

	public static void exportModels(IContainer destination, Iterable<URI> resourceURIs) {
		IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();

		List<DIModel> models = Lists.newArrayList();
		for (URI next : resourceURIs) {
			CDOCheckout checkout = CDOExplorerUtil.getCheckout(next);
			if (checkout != null) {
				CDOView view = checkout.getView();
				if (view != null) { // the repository could be disconnected by now
					try {
						CDOResourceNode resource = view.getResourceNode(CDOURIUtil.extractResourcePath(next));
						if (resource instanceof CDOResource) {
							// only export DI models!
							if (DIResourceQuery.getDIResources(view).contains(resource)) {
								models.add(DIModel.getInstance((CDOResource) resource, true));
							}
						}
					} catch (Exception e) {
						// normal consequence of the repository path not being found
					}
				}
			}
		}

		if ((window != null) && !models.isEmpty()) {
			exportModels(window, destination, new StructuredSelection(models));
		}
	}
}