/*
 * Copyright (C) 2007-2012 Argeo GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.argeo.slc.client.ui.dist.commands;

import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.nodetype.NodeType;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.argeo.ArgeoException;
import org.argeo.slc.client.ui.dist.DistPlugin;
import org.argeo.slc.client.ui.dist.utils.CommandHelpers;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;

/**
 * Delete chosen workspace in the current repository.
 */

public class DeleteWorkspace extends AbstractHandler {
	private static final Log log = LogFactory.getLog(DeleteWorkspace.class);

	public final static String ID = DistPlugin.ID + ".deleteWorkspace";
	public final static String PARAM_WORKSPACE_NAME = DistPlugin.ID
			+ ".workspaceName";
	public final static String DEFAULT_LABEL = "Delete";
	public final static String DEFAULT_ICON_PATH = "icons/removeItem.gif";

	/* DEPENDENCY INJECTION */
	private Repository repository;

	public Object execute(ExecutionEvent event) throws ExecutionException {

		// MessageDialog.openWarning(DistPlugin.getDefault()
		// .getWorkbench().getDisplay().getActiveShell(),
		// "WARNING", "Not yet implemented");
		// return null;

		String workspaceName = event.getParameter(PARAM_WORKSPACE_NAME);
		String msg = "Your are about to clear workspace [" + workspaceName
				+ "].\n Do you really want to proceed ?";

		boolean result = MessageDialog.openConfirm(DistPlugin.getDefault()
				.getWorkbench().getDisplay().getActiveShell(),
				"Confirm workspace clear", msg);
		if (result) {
			Session session = null;
			try {
				session = repository.login(workspaceName);
				NodeIterator nit = session.getRootNode().getNodes();
				while (nit.hasNext()) {
					Node node = nit.nextNode();
					if (node.isNodeType(NodeType.NT_FOLDER)
							|| node.isNodeType(NodeType.NT_UNSTRUCTURED)) {
						String path = node.getPath();
						node.remove();
						session.save();
						if (log.isDebugEnabled())
							log.debug("Cleared " + path + " in "
									+ workspaceName);
					}
				}
				CommandHelpers.callCommand(RefreshDistributionsView.ID);
			} catch (RepositoryException re) {
				throw new ArgeoException(
						"Unexpected error while deleting workspace ["
								+ workspaceName + "].", re);
			} finally {
				if (session != null)
					session.logout();
			}
		}
		return null;
	}

	/* DEPENDENCY INJECTION */
	public void setRepository(Repository repository) {
		this.repository = repository;
	}
}