/*******************************************************************************
 * Copyright (c) 2005-2008 Polarion Software.
 * 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:
 *    Alexander Gurov (Polarion Software) - initial API and implementation
 *******************************************************************************/

package org.eclipse.team.svn.ui.crashrecovery;

import org.eclipse.core.resources.IProject;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.team.svn.core.extension.crashrecovery.ErrorDescription;
import org.eclipse.team.svn.core.extension.crashrecovery.IResolutionHelper;
import org.eclipse.team.svn.core.operation.CompositeOperation;
import org.eclipse.team.svn.core.operation.remote.management.AddRepositoryLocationOperation;
import org.eclipse.team.svn.core.operation.remote.management.SaveRepositoryLocationsOperation;
import org.eclipse.team.svn.core.resource.IRepositoryLocation;
import org.eclipse.team.svn.core.svnstorage.SVNRemoteStorage;
import org.eclipse.team.svn.ui.SVNUIMessages;
import org.eclipse.team.svn.ui.operation.RefreshRepositoryLocationsOperation;
import org.eclipse.team.svn.ui.utility.UIMonitorUtility;

/**
 * Provides ability to handle situation when repository location which is attached to the project is discarded.
 * 
 * @author Alexander Gurov
 */
public class DiscardedLocationHelper implements IResolutionHelper {

	public boolean acquireResolution(ErrorDescription description) {
		if (description.code == ErrorDescription.REPOSITORY_LOCATION_IS_DISCARDED) {
			Object []context = (Object [])description.context;
			
			final IRepositoryLocation location = (IRepositoryLocation)context[1];
			
			// check if location is unavailable due to project is checked out with very old plug-in version
			if (location == null) {
				return false;
			}
			
			// check if already handled for any other project
			if (SVNRemoteStorage.instance().getRepositoryLocation(location.getId()) != null) {
				return true;
			}
			
			final IProject project = (IProject)context[0];
			
			final boolean []solved = new boolean[] {false};
			UIMonitorUtility.parallelSyncExec(new Runnable() {
				public void run() {
					MessageDialog dlg = new MessageDialog(
							UIMonitorUtility.getShell(), 
							SVNUIMessages.DiscardedLocationHelper_Dialog_Title, 
							null, 
							SVNUIMessages.format(SVNUIMessages.DiscardedLocationHelper_Dialog_Message, new String[] {project.getName(), location.getLabel()}), 
							MessageDialog.WARNING, 
							new String[] {IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL}, 
							0);
					solved[0] = dlg.open() == 0;
				}
			});
			
			if (solved[0]) {
				AddRepositoryLocationOperation mainOp = new AddRepositoryLocationOperation(location);
				CompositeOperation op = new CompositeOperation(mainOp.getId(), mainOp.getMessagesClass());
				op.add(mainOp);
				op.add(new SaveRepositoryLocationsOperation());
				op.add(new RefreshRepositoryLocationsOperation(new IRepositoryLocation[] {location}, true));
				UIMonitorUtility.doTaskBusyDefault(op);
			}
			
			return solved[0];
		}
		return false;
	}

}