/* 
 * Copyright 2003,2004 Colin Crist
 *
 * 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 hermes.browser.tasks;

import hermes.Domain;
import hermes.Hermes;
import hermes.browser.HermesBrowser;
import hermes.browser.IconCache;
import hermes.browser.model.BrowserTreeModel;
import hermes.browser.model.tree.HermesTreeNode;
import hermes.config.DestinationConfig;
import hermes.swing.SwingRunner;

import java.util.ArrayList;
import java.util.Iterator;

import javax.jms.JMSException;
import javax.swing.JOptionPane;
import javax.swing.tree.TreePath;

import org.apache.log4j.Logger;

/**
 * @author colincrist@yaho.com last changed by: $Author: colincrist $
 * @version $Id: DiscoverDestinationsTask,v 1.5 2004/11/02 22:01:40 colincrist
 *          Exp $
 */
public class DiscoverDestinationsTask extends TaskSupport {
	private static final Logger log = Logger.getLogger(DiscoverDestinationsTask.class);
	private final Hermes hermes;
	private final HermesTreeNode hermesNode;
	private final BrowserTreeModel treeModel;
	private final String title;

	/**
	 * @param content
	 * @param title
	 * @param listener
	 */
	public DiscoverDestinationsTask(BrowserTreeModel treeModel, HermesTreeNode hermesNode) throws JMSException {
		super(IconCache.getIcon("jms.unknown"));

		this.hermesNode = hermesNode;
		this.treeModel = treeModel;
		this.hermes = hermesNode.getHermes();
		this.title = "Discover from " + hermesNode.getHermes().getId();
	}

	@Override
	public String getTitle() {
		return title;
	}

	@Override
	public void invoke() throws Exception {
		try {

			final ArrayList<DestinationConfig> destinations = new ArrayList<DestinationConfig>(hermes.discoverDestinationConfigs());

			for (Iterator iter = destinations.iterator(); iter.hasNext();) {
				DestinationConfig dConfig = (DestinationConfig) iter.next();

				log.info("found name=" + dConfig.getName() + ", domain=" + Domain.getDomain(dConfig.getDomain()) + (dConfig.isDurable() ? " durableName=" + dConfig.getClientID() : ""));
			}

			if (isRunning()) {
				final StringBuffer msg = new StringBuffer();

				switch (destinations.size()) {
				case 0:
					msg.append("No destinations found.");
					break;
				case 1:
					msg.append("One destination found.");
					break;

				default:
					msg.append("Discovered " + Integer.toString(destinations.size())).append(" destinations.");
				}

				if (destinations.size() == 0) {
					SwingRunner.invokeLater(new Runnable() {
						@Override
						public void run() {
							JOptionPane.showMessageDialog(HermesBrowser.getBrowser(), msg.toString(), "Discover.", JOptionPane.OK_OPTION);
						}
					});
				} else {
					msg.append("\nWould you like to replace the current set of destinations for ").append(hermes.getId()).append(".");

					SwingRunner.invokeLater(new Runnable() {
						@Override
						public void run() {
							if (hermesNode.getChildCount() == 0
									|| JOptionPane.showConfirmDialog(HermesBrowser.getBrowser(), msg.toString(), "Discover.", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
								try {
									HermesBrowser.getBrowser().replaceDestinationConfigs(hermes, destinations);
									HermesBrowser.getBrowser().saveConfig();
									treeModel.nodeStructureChanged(hermesNode);
									HermesBrowser.getBrowser().getBrowserTree().expandPath(new TreePath(hermesNode.getPath()));

									Hermes.ui.getDefaultMessageSink().add("Destinations updated for " + hermes.getId());
								} catch (Exception ex) {

									HermesBrowser.getBrowser().showErrorDialog("Adding destinations to tree", ex);
								}
							} else {
								Hermes.ui.getDefaultMessageSink().add("Update of destinations for " + hermes.getId() + " cancelled.");
							}
						}
					});
				}
			} else {
				Hermes.ui.getDefaultMessageSink().add("Discover on " + hermes.getId() + " cancelled");
			}
		} finally {
			hermes.close();
		}
	}

}