/*******************************************************************************
 * Copyright (c) 2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *     Red Hat - update to Mylyn 3.0 API
 *******************************************************************************/
package org.eclipse.ecf.internal.mylyn.ui;

import java.io.File;
import java.io.FileOutputStream;
import java.util.List;
import java.util.Set;
import org.eclipse.core.runtime.*;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.datashare.*;
import org.eclipse.ecf.datashare.events.IChannelEvent;
import org.eclipse.ecf.datashare.events.IChannelMessageEvent;
import org.eclipse.ecf.presence.service.IPresenceService;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.mylyn.context.core.ContextCore;
import org.eclipse.mylyn.context.core.IInteractionContext;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.eclipse.ui.progress.UIJob;
import org.osgi.framework.*;

public class Activator extends AbstractUIPlugin implements IChannelListener, ServiceListener {

	static final String PLUGIN_ID = "org.eclipse.ecf.mylyn.ui"; //$NON-NLS-1$

	private static Activator plugin;

	private BundleContext context;

	public void start(final BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
		this.context = context;
		context.addServiceListener(this);
	}

	protected void initializeImageRegistry(ImageRegistry reg) {
		reg.put("IMG_SHARED_TASK", imageDescriptorFromPlugin(PLUGIN_ID, "icons/full/etool16/shared_task.gif").createImage());
	}

	public void stop(BundleContext context) throws Exception {
		plugin = null;
		context.removeServiceListener(this);
		super.stop(context);
	}

	private void registerChannel(IChannelContainerAdapter channelAdapter) {
		try {
			ID channelID = channelAdapter.getChannelNamespace().createInstance(new Object[] {Activator.PLUGIN_ID});
			IChannel channel = channelAdapter.getChannel(channelID);
			if (channel == null) {
				channel = channelAdapter.createChannel(channelID, this, null);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private void unregisterChannel(IChannelContainerAdapter channelAdapter) {
		try {
			ID channelID = channelAdapter.getChannelNamespace().createInstance(new Object[] {Activator.PLUGIN_ID});
			channelAdapter.removeChannel(channelID);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public synchronized void handleChannelEvent(IChannelEvent e) {
		if (e instanceof IChannelMessageEvent) {
			IChannelMessageEvent msgEvent = (IChannelMessageEvent) e;
			byte[] data = msgEvent.getData();
			File file = new File(getStateLocation().toFile(), "incoming.xml.zip");
			try {
				FileOutputStream fos = new FileOutputStream(file);
				fos.write(data);
				List tasks = TasksUiPlugin.getTaskListManager().getTaskListWriter().readTasks(file);
				final ITask task = (ITask) tasks.get(0);
				Set repositories = TasksUiPlugin.getTaskListManager().getTaskListWriter().readRepositories(file);
				TasksUiPlugin.getRepositoryManager().insertRepositories(repositories, TasksUiPlugin.getDefault().getRepositoriesFilePath());
				IInteractionContext context = ContextCore.getContextStore().importContext(task.getHandleIdentifier(), file);
				CompoundContextActivationContributionItem.enqueue(task, context);

				IWorkbenchWindow[] windows = PlatformUI.getWorkbench().getWorkbenchWindows();
				Shell aShell = null;
				for (int i = 0; i < windows.length; i++) {
					aShell = windows[i].getShell();
					if (aShell != null) {
						break;
					}
				}

				if (aShell == null) {
					return;
				}

				final Shell shell = aShell;

				UIJob job = new UIJob("Notify of incoming shared task") {
					public IStatus runInUIThread(IProgressMonitor monitor) {
						final IncomingSharedTaskNotificationPopup popup = new IncomingSharedTaskNotificationPopup(shell);
						popup.setTask(task);
						popup.open();

						new UIJob(shell.getDisplay(), "Close Popup Job") { //$NON-NLS-1$
							public IStatus runInUIThread(IProgressMonitor monitor) {
								Shell shell = popup.getShell();
								if (shell != null && !shell.isDisposed()) {
									popup.close();
								}
								monitor.done();
								return Status.OK_STATUS;
							}
						}.schedule(5000);
						return Status.OK_STATUS;
					}
				};
				job.schedule();
			} catch (Exception ex) {
				ex.printStackTrace();
			} finally {
				file.delete();
			}
		}
	}

	public void serviceChanged(ServiceEvent event) {
		Object service = context.getService(event.getServiceReference());
		if (service instanceof IAdaptable) {
			service = ((IAdaptable) service).getAdapter(IPresenceService.class);
		}
		if (service instanceof IPresenceService) {
			IPresenceService presenceService = (IPresenceService) service;
			IChannelContainerAdapter channelAdapter = (IChannelContainerAdapter) presenceService.getAdapter(IChannelContainerAdapter.class);
			if (channelAdapter != null) {
				switch (event.getType()) {
					case ServiceEvent.REGISTERED :
						registerChannel(channelAdapter);
						break;
					case ServiceEvent.UNREGISTERING :
						unregisterChannel(channelAdapter);
						break;
				}
			}
		}
	}

	public static Activator getDefault() {
		return plugin;
	}
}