/*

 * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 * TraceViewer event listener

 *

 */

package com.nokia.traceviewer.engine;

import org.eclipse.ui.PlatformUI;

import com.nokia.trace.eventrouter.PropertySource;

import com.nokia.trace.eventrouter.TraceEvent;

import com.nokia.trace.eventrouter.TraceEventListener;

import com.nokia.trace.eventrouter.TraceEventRouter;

import com.nokia.traceviewer.TraceViewerPlugin;

/**

 * TraceViewer event listener

 * 

 */

final class TraceViewerEventListener implements TraceEventListener {

	/**

	 * Component ID string

	 */

	private static final String CID_STR = "cid"; //$NON-NLS-1$

	/**

	 * Group ID string

	 */

	private static final String GID_STR = "gid"; //$NON-NLS-1$

	/**

	 * Trace ID string

	 */

	private static final String TID_STR = "tid"; //$NON-NLS-1$

	/**

	 * Search trace action string

	 */

	private static final String SEARCHTRACEACTION = "searchtrace"; //$NON-NLS-1$

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.trace.eventrouter.TraceEventListener#processEvent(com.nokia

	 * .trace.eventrouter.TraceEvent)

	 */

	public void processEvent(TraceEvent event) {

		if (event.getSource() instanceof PropertySource) {

			final PropertySource source = (PropertySource) event.getSource();

			// This Event is meant for this plugin if the target is the

			// ID of this Plugin

			if (source.getTargetId().equals(TraceViewerPlugin.PLUGIN_ID)) {

				PlatformUI.getWorkbench().getDisplay().asyncExec(

						new Runnable() {

							/*

							 * (non-Javadoc)

							 * 

							 * @see java.lang.Runnable#run()

							 */

							public void run() {

								handleEvent(source);

							}

						});

			}

		}

	}

	/**

	 * Handles the event

	 * 

	 * @param source

	 *            propertysource of the event to handle

	 */

	private void handleEvent(PropertySource source) {

		String action = source.getActionName();

		if (action.equals(SEARCHTRACEACTION)) {

			handleSearchTraceAction(source);

		} else {

			// Unknown event action, do nothing

		}

	}

	/**

	 * Handles search trace action

	 * 

	 * @param source

	 *            propertysource of the event to handle

	 */

	private void handleSearchTraceAction(PropertySource source) {

		// View must exist to use the search functionality

		if (TraceViewerGlobals.getTraceViewer().getView() != null) {

			String cidStr = source.getProperties().get(CID_STR);

			String gidStr = source.getProperties().get(GID_STR);

			String tidStr = source.getProperties().get(TID_STR);

			try {

				int cid = Integer.parseInt(cidStr);

				// Get the group ID in a separate method

				int gid = getGroupID(cid, gidStr);

				int tid = Integer.parseInt(tidStr);

				// Create the search if ID's are valid

				if (gid != -1 && tid != -1) {

					TraceViewerGlobals.getTraceViewer()

							.getDataProcessorAccess().getSearchProcessor()

							.searchTraceWithID(cid, gid, tid);

				}

			} catch (NumberFormatException e) {

				// If numbers parsing failed, show a error message

				String errMsg1 = Messages

						.getString("TraceViewerEventListener.InvalidSearchTraceMsg1"); //$NON-NLS-1$

				String errMsg2 = Messages

						.getString("TraceViewerEventListener.InvalidSearchTraceMsg2"); //$NON-NLS-1$

				TraceViewerGlobals.getTraceViewer().getDialogs()

						.showErrorMessage(

								errMsg1 + source.getSourceId() + errMsg2);

			}

		}

	}

	/**

	 * Gets group ID from the group string

	 * 

	 * @param componentId

	 *            component ID

	 * @param gidStr

	 *            group ID string

	 * @return group ID or -1 if parsing failed

	 */

	private int getGroupID(int componentId, String gidStr) {

		int groupId = -1;

		// First try to parse integer

		try {

			groupId = Integer.parseInt(gidStr);

			// If parsing failed, string contains the group name. Go ask the ID

			// from the DecodeProvider

		} catch (NumberFormatException e) {

			if (TraceViewerGlobals.getDecodeProvider() != null) {

				groupId = TraceViewerGlobals.getDecodeProvider().getGroupId(

						componentId, gidStr);

			}

		}

		return groupId;

	}

	/**

	 * Registers itself to the event router

	 */

	public void register() {

		TraceEventRouter.getInstance().addEventListener(this);

	}

	/**

	 * Unregisters itself from the event router

	 */

	public void unregister() {

		TraceEventRouter.getInstance().removeEventListener(this);

	}

}