/*****************************************************************************
 * Copyright (c) 2009, 2017 CEA LIST, Christian W. Damus, and others.
 *
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *  Patrick Tessier (CEA LIST) Patrick.tessier@cea.fr - Initial API and implementation
 *  Christian W. Damus (CEA LIST) - adapted for CDO repository resource hyperlinks
 *  Christian W. Damus (CEA) - adapt to source-incompatible API change in CDO Luna M6
 *  Eike Stepper (CEA) - bug 466520
 *  Christian W. Damus - bug 488965
 *
 *****************************************************************************/
package org.eclipse.papyrus.cdo.internal.ui.hyperlink;

import java.util.List;

import org.eclipse.emf.cdo.eresource.CDOFileResource;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.eresource.CDOResourceNode;
import org.eclipse.emf.cdo.eresource.util.EresourceSwitch;
import org.eclipse.emf.cdo.explorer.CDOExplorerUtil;
import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
import org.eclipse.emf.cdo.explorer.ui.checkouts.CDOCheckoutContentProvider;
import org.eclipse.emf.cdo.explorer.ui.checkouts.actions.OpenWithActionProvider;
import org.eclipse.emf.cdo.ui.CDOEditorUtil;
import org.eclipse.emf.cdo.util.CDOURIUtil;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.window.Window;
import org.eclipse.net4j.util.ui.UIUtil;
import org.eclipse.osgi.util.NLS;
import org.eclipse.papyrus.cdo.internal.ui.editors.PapyrusCDOEditorOpener;
import org.eclipse.papyrus.cdo.internal.ui.views.DIResourceQuery;
import org.eclipse.papyrus.infra.hyperlink.Activator;
import org.eclipse.papyrus.infra.hyperlink.object.HyperLinkObject;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

/**
 * The hyperlink abstraction for links to documents in CDO repositories.
 */
public class CDOResourceHyperlink extends HyperLinkObject {

	/**
	 * Gets the hyperlinked resource URI.
	 *
	 * @return the hyperlinked resource URI
	 */
	public URI getHyperlink() {
		return (URI) super.getObject();
	}

	/**
	 * Sets the hyperlinked resource URI.
	 *
	 * @param uri
	 *            the new hyperlinked resource URI
	 */
	public void setHyperlink(URI uri) {
		super.setObject(uri);
	}

	@Override
	public void openLink() {
		try {
			// open the appropriate editor
			URI uri = getHyperlink();

			CDOCheckout checkout = CDOExplorerUtil.getCheckout(uri);
			if (checkout == null) {
				MessageDialog.openError(UIUtil.getActiveWorkbenchWindow().getShell(), Messages.CDOResourceHyperlink_openError, Messages.CDOResourceHyperlink_notConnected);
			} else if (!checkout.isOpen()) {
				checkout.open();
				if (!checkout.isOpen()) {
					MessageDialog.openError(UIUtil.getActiveWorkbenchWindow().getShell(), Messages.CDOResourceHyperlink_openError, Messages.CDOResourceHyperlink_notConnected);
				}
			}

			// we may have connected a previously disconnected repo, above
			if ((checkout != null) && checkout.isOpen()) {
				CDOView master = checkout.getView();

				String path = CDOURIUtil.extractResourcePath(uri);
				if (!master.hasResource(path)) {
					MessageDialog.openError(UIUtil.getActiveWorkbenchWindow().getShell(), Messages.CDOResourceHyperlink_openError, NLS.bind(Messages.CDOResourceHyperlink_noSuchResource, path));
				} else {
					CDOResourceNode node = master.getResourceNode(path);
					openResource(node);
				}
			}
		} catch (Exception e) {
			Activator.log.error(e);
		}
	}

	protected void openResource(CDOResourceNode node) {
		IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		final IWorkbenchPage page = window.getActivePage();

		new EresourceSwitch<Void>() {

			@Override
			public <IO> Void caseCDOFileResource(CDOFileResource<IO> object) {
				CDOEditorUtil.openEditor(page, object);
				return null;
			}

			@Override
			public Void caseCDOResource(CDOResource object) {
				if (object.isRoot()) {
					// the root resource is a proxy for the repository
					CDOCheckout checkout = CDOExplorerUtil.getCheckout(object.getURI());
					CDOCheckoutContentProvider contentProvider = CDOCheckoutContentProvider.getInstance(CDOCheckoutContentProvider.PROJECT_EXPLORER_ID);
					if (contentProvider != null) {
						// TODO Open project explorer on demand.
						contentProvider.selectObjects(checkout);
					}
				} else {
					CDOResource diResource = DIResourceQuery.getAffiliateResource(object);

					if (diResource == null) {
						// open regular CDO model resource
						OpenWithActionProvider.openEditor(page, null, object, null);
					} else {
						// open Papyrus model
						OpenWithActionProvider.openEditor(page, null, diResource, PapyrusCDOEditorOpener.ID);
					}
				}

				return null;
			}
		}.doSwitch(node);
	}

	@Override
	public void executeEditMousePressed(Shell parentShell, List<HyperLinkObject> list, EObject aModel) {
		CDOResourceHyperlinkEditorShell editor = new CDOResourceHyperlinkEditorShell(parentShell);
		editor.setHyperlink(this);
		if (editor.open() == Window.OK) {
			int index = list.indexOf(this);
			list.set(index, editor.getHyperlink());
		}
	}

	@Override
	public boolean needsOpenCommand() {
		return false;
	}
}