/*******************************************************************************
 * 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 - Initial API and implementation
 *******************************************************************************/

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

import java.util.HashSet;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.widgets.Shell;
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.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;

/**
 * Select revision for any repository resource
 * 
 * @author Alexander Gurov
 */
public class SelectResourceRevisionAction extends AbstractRepositoryTeamAction {
	public SelectResourceRevisionAction() {
		super();
	}

	public void runImpl(IAction action) {
		IRepositoryResource []resources = this.getSelectedRepositoryResources();
		this.runImpl(resources);
	}
	
	protected void runImpl(IRepositoryResource []resources) {
		IActionOperation op = SelectResourceRevisionAction.getAddRevisionLinkOperation(resources, this.getShell());
		if (op != null) {
			this.runScheduled(op);
		}
	}
	
	public static IActionOperation getAddRevisionLinkOperation(IRepositoryResource []resources, Shell shell) {
		SVNRevision selectedRevision = null;
		final String comment[] = new String[1];
				 
		InputRevisionPanel panel = new InputRevisionPanel(resources.length == 1 ? resources[0] : null, false, null);
		DefaultDialog dialog = new DefaultDialog(shell, panel);
		if (dialog.open() == Dialog.OK) {			
			comment[0] = panel.getRevisionComment();			
			if (resources.length == 1) {
				selectedRevision = panel.getSelectedRevision();
				resources[0] = SVNUtility.copyOf(resources[0]);
				resources[0].setSelectedRevision(selectedRevision);	
			}			
									
			final LocateResourceURLInHistoryOperation locateOp = new LocateResourceURLInHistoryOperation(resources);
			AbstractActionOperation mainOp = 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[0]);
					} 							
					return links;
				}
			}, selectedRevision);
			CompositeOperation op = new CompositeOperation(mainOp.getId());
			op.add(locateOp);
			op.add(mainOp, new IActionOperation[] {locateOp});
			op.add(new SaveRepositoryLocationsOperation());
			HashSet<IRepositoryLocation> locations = new HashSet<IRepositoryLocation>();
			for (IRepositoryResource resource : resources) {
				locations.add(resource.getRepositoryLocation());
			}
			op.add(new RefreshRepositoryLocationsOperation(locations.toArray(new IRepositoryLocation[locations.size()]), true));
			return op;
		}
		return null;
	}
	
	public boolean isEnabled() {
		return this.getSelectedRepositoryResources().length > 0;
	}

}