/*******************************************************************************
 * 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:
 *    Igor Burilo - Initial API and implementation
 *******************************************************************************/

package org.eclipse.team.svn.ui.action.remote.management;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.team.svn.core.connector.SVNRevision;
import org.eclipse.team.svn.core.operation.AbstractActionOperation;
import org.eclipse.team.svn.core.operation.CompositeOperation;
import org.eclipse.team.svn.core.operation.IActionOperation;
import org.eclipse.team.svn.core.operation.remote.LocateResourceURLInHistoryOperation;
import org.eclipse.team.svn.core.operation.remote.management.AddRevisionLinkOperation;
import org.eclipse.team.svn.core.operation.remote.management.SaveRepositoryLocationsOperation;
import org.eclipse.team.svn.core.resource.IRepositoryLocation;
import org.eclipse.team.svn.core.resource.IRepositoryResource;
import org.eclipse.team.svn.core.resource.IRevisionLink;
import org.eclipse.team.svn.core.resource.IRevisionLinkProvider;
import org.eclipse.team.svn.core.utility.SVNUtility;
import org.eclipse.team.svn.ui.SVNUIMessages;
import org.eclipse.team.svn.ui.action.AbstractRepositoryTeamAction;
import org.eclipse.team.svn.ui.dialog.DefaultDialog;
import org.eclipse.team.svn.ui.operation.RefreshRepositoryLocationsOperation;
import org.eclipse.team.svn.ui.panel.common.InputRevisionPanel;
import org.eclipse.team.svn.ui.repository.model.RepositoryRevision;

/**
 * Edit revision link
 * 
 * @author Igor Burilo
 */
public class EditRevisionLinkAction extends AbstractRepositoryTeamAction {

	public EditRevisionLinkAction() {
		super();
	}

	public void runImpl(IAction action) {
		RepositoryRevision revision = ((RepositoryRevision [])this.getAdaptedSelection(RepositoryRevision.class))[0];
		final IRevisionLink oldLink = revision.getRevisionLink();
		IRepositoryResource resource = oldLink.getRepositoryResource();
		SVNRevision oldRevision = revision.getRevision();					
		
		InputRevisionPanel panel = new InputRevisionPanel(oldLink.getRepositoryResource(), true, oldLink.getComment());
		DefaultDialog dialog = new DefaultDialog(this.getShell(), panel);
		if (dialog.open() == Dialog.OK) {
			SVNRevision selectedRevision = panel.getSelectedRevision();
			final String comment = panel.getRevisionComment();
			
			CompositeOperation op = new CompositeOperation("Operation_EditRevisionLink", SVNUIMessages.class); //$NON-NLS-1$
			if (!oldRevision.equals(selectedRevision)) {
				//delete old link and re-create new link															
				IActionOperation mainOp = new AbstractActionOperation("Operation_EditRevisionLink", SVNUIMessages.class) { //$NON-NLS-1$
					protected void runImpl(IProgressMonitor monitor) throws Exception {
						oldLink.getRepositoryResource().getRepositoryLocation().removeRevisionLink(oldLink);						
					}
				};
												
				resource = SVNUtility.copyOf(resource);
				resource.setSelectedRevision(selectedRevision);
				
				final LocateResourceURLInHistoryOperation locateOp = new LocateResourceURLInHistoryOperation(new IRepositoryResource[]{resource});
								
				AddRevisionLinkOperation addOp = new AddRevisionLinkOperation(new IRevisionLinkProvider() {			
					public IRevisionLink[] getRevisionLinks() {
						IRepositoryResource[] resources = locateOp.getRepositoryResources();
						IRevisionLink[] links = new IRevisionLink[resources.length];
						for (int i = 0; i < resources.length; i ++) {
							links[i] = SVNUtility.createRevisionLink(resources[i]);
							links[i].setComment(comment);
						} 							
						return links;
					}
				}, selectedRevision);
				
				op.add(mainOp);
				op.add(locateOp, new IActionOperation[]{mainOp});
				op.add(addOp, new IActionOperation[] {mainOp, locateOp});				
			} else {
				//change link comment								
				IActionOperation mainOp = new AbstractActionOperation("Operation_EditRevisionLink", SVNUIMessages.class) { //$NON-NLS-1$
					protected void runImpl(IProgressMonitor monitor) throws Exception {
						oldLink.setComment(comment);
					}
				};				
				op.add(mainOp);				
			}	
			
			op.add(new SaveRepositoryLocationsOperation());
			op.add(new RefreshRepositoryLocationsOperation(new IRepositoryLocation[]{resource.getRepositoryLocation()}, true));
			this.runScheduled(op);
		}
	}
	
	public boolean isEnabled() {
		return this.getAdaptedSelection(RepositoryRevision.class).length == 1;
	}
}