/****************************************************************************
 * Copyright (c) 2004, 2009 Composent, Inc. 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:
 *    Composent, Inc. - initial API and implementation
 *****************************************************************************/
package org.eclipse.ecf.internal.provider.irc;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.ecf.core.util.LogHelper;
import org.eclipse.ecf.core.util.SystemLogService;
import org.osgi.framework.*;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;

/**
 * The main plugin class to be used in the desktop.
 */
public class Activator implements BundleActivator {

	public static final String PLUGIN_ID = "org.eclipse.ecf.provider.irc"; //$NON-NLS-1$

	// The shared instance.
	private static Activator plugin;

	private BundleContext bundleContext = null;
	private ServiceTracker logServiceTracker = null;
	private LogService logService;

	public static void log(String message) {
		getDefault().log(
				new Status(IStatus.OK, PLUGIN_ID, IStatus.OK, message, null));
	}

	public static void log(String message, Throwable e) {
		getDefault().log(
				new Status(IStatus.ERROR, PLUGIN_ID, IStatus.OK,
						"Caught exception", e)); //$NON-NLS-1$
	}

	protected LogService getLogService() {
		if (logService == null) {
			if (logServiceTracker == null) {
				logServiceTracker = new ServiceTracker(this.bundleContext,
						LogService.class.getName(), null);
				logServiceTracker.open();
			}

			logService = (LogService) logServiceTracker.getService();
			if (logService == null) {
				logService = new SystemLogService(PLUGIN_ID);
			}
		}
		return logService;
	}

	public void log(IStatus status) {
		LogService logService = getLogService();
		if (logService != null) {
			logService.log(LogHelper.getLogCode(status),
					LogHelper.getLogMessage(status), status.getException());
		}
	}

	/**
	 * The constructor.
	 */
	public Activator() {
		plugin = this;
	}

	/**
	 * This method is called upon plug-in activation
	 */
	public void start(BundleContext context) throws Exception {
		this.bundleContext = context;
	}

	/**
	 * This method is called when the plug-in is stopped
	 */
	public void stop(BundleContext context) throws Exception {
		if (logServiceTracker != null) {
			logServiceTracker.close();
			logServiceTracker = null;
		}
		this.bundleContext = null;
		plugin = null;
	}

	/**
	 * Returns the shared instance.
	 */
	public synchronized static Activator getDefault() {
		if (plugin == null) {
			plugin = new Activator();
		}
		return plugin;
	}

	public boolean hasDatashare() {
		if (bundleContext == null)
			return false;
		Bundle[] bundles = bundleContext.getBundles();
		for (int i = 0; i < bundles.length; i++)
			if (bundles[i].getSymbolicName().equals(
					"org.eclipse.ecf.provider.datashare.nio"))
				return true;
		return false;
	}

}