/*

 * Copyright (c) 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:

 *

 * Model extension listener for console UI

 *

 */

package com.nokia.tracecompiler;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import com.nokia.tracecompiler.engine.TraceCompilerEngineErrorMessages;

import com.nokia.tracecompiler.engine.TraceCompilerEngineGlobals;

import com.nokia.tracecompiler.engine.TraceLocation;

import com.nokia.tracecompiler.engine.TraceLocationList;

import com.nokia.tracecompiler.engine.TraceLocationListListener;

import com.nokia.tracecompiler.engine.TraceCompilerEngineErrorCodes.TraceCompilerErrorCode;

import com.nokia.tracecompiler.model.TraceModelExtension;

import com.nokia.tracecompiler.model.TraceModelExtensionListener;

import com.nokia.tracecompiler.model.TraceModelListener;

import com.nokia.tracecompiler.model.TraceObject;

import com.nokia.tracecompiler.model.TraceProcessingListener;

import com.nokia.tracecompiler.source.SourceConstants;

import com.nokia.tracecompiler.source.SourceLocationListener;

/**

 * Model extension listener for TraceCompiler UI

 * 

 */

final class TraceCompilerModelListener implements TraceModelListener,

		TraceModelExtensionListener, TraceLocationListListener,

		SourceLocationListener, TraceProcessingListener {

	/**

	 * List of errors for a source

	 */

	private ArrayList<TraceLocation> errorList = new ArrayList<TraceLocation>();

	/**

	 * Name of the file being processed

	 */

	private String currentFileName;

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelListener#

	 * objectAdded(com.nokia.tracecompiler.model.TraceObject,

	 * com.nokia.tracecompiler.model.TraceObject)

	 */

	public void objectAdded(TraceObject owner, TraceObject object) {

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelListener#

	 * objectCreationComplete(com.nokia.tracecompiler.model.TraceObject)

	 */

	public void objectCreationComplete(TraceObject object) {

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelListener#

	 * objectRemoved(com.nokia.tracecompiler.model.TraceObject,

	 * com.nokia.tracecompiler.model.TraceObject)

	 */

	public void objectRemoved(TraceObject owner, TraceObject object) {

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelListener#

	 * propertyUpdated(com.nokia.tracecompiler.model.TraceObject, int)

	 */

	public void propertyUpdated(TraceObject object, int property) {

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelExtensionListener#

	 * extensionAdded(com.nokia.tracecompiler.model.TraceObject,

	 * com.nokia.tracecompiler.model.TraceModelExtension)

	 */

	public void extensionAdded(TraceObject object, TraceModelExtension extension) {

		if (extension instanceof TraceLocationList) {

			((TraceLocationList) extension).addLocationListListener(this);

		}

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.model.TraceModelExtensionListener#

	 * extensionRemoved(com.nokia.tracecompiler.model.TraceObject,

	 * com.nokia.tracecompiler.model.TraceModelExtension)

	 */

	public void extensionRemoved(TraceObject object,

			TraceModelExtension extension) {

		if (extension instanceof TraceLocationList) {

			((TraceLocationList) extension).removeLocationListListener(this);

		}

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.source.TraceLocationListListener#

	 * locationAdded(com.nokia.tracecompiler.engine.TraceLocation)

	 */

	public void locationAdded(TraceLocation location) {

		location.addLocationListener(this);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.source.TraceLocationListListener#

	 * locationRemoved(com.nokia.tracecompiler.engine.TraceLocation)

	 */

	public void locationRemoved(TraceLocation location) {

		location.removeLocationListener(this);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.source.SourceLocationListener#

	 * locationValidityChanged(com.nokia.tracecompiler.engine.TraceLocation)

	 */

	public void locationValidityChanged(TraceLocation location) {

		String fileName = location.getFileName();

		if (currentFileName != null) {

			if (!fileName.equals(currentFileName)) {

				currentFileName = fileName;

				printLocationErrors();

			}

		} else {

			currentFileName = fileName;

		}

		TraceCompilerErrorCode code = location.getValidityCode();

		if (code != TraceCompilerErrorCode.OK

				&& code != TraceCompilerErrorCode.TRACE_DOES_NOT_EXIST) {

			if (!errorList.contains(location)) {

				errorList.add(location);

				location.reference();

			}

		} else {

			if (errorList.remove(location)) {

				location.dereference();

			}

		}

	}

	/**

	 * Prints the errors from the error list

	 */

	void printLocationErrors() {

		Collections.sort(errorList, new Comparator<TraceLocation>() {

			/**

			 * Sorts the array by line number

			 * 

			 * @param o1

			 *            location 1

			 * @param o2

			 *            location 2

			 * @return the result

			 */

			public int compare(TraceLocation o1, TraceLocation o2) {

				int line1 = o1.getLineNumber();

				int line2 = o2.getLineNumber();

				return line1 > line2 ? 1 : line1 == line2 ? 0 : -1;

			}

		});

		for (TraceLocation location : errorList) {

			printLocationError(location);

		}

		errorList.clear();

	}

	/**

	 * Prints a location error

	 * 

	 * @param location

	 *            the location

	 */

	private void printLocationError(TraceLocation location) {

		TraceCompilerEngineGlobals.getEvents().postErrorMessage(

				location.getFileName()

						+ Messages.getString("TraceCompilerModelListener.lineNumberPrefix") //$NON-NLS-1$

						+ location.getLineNumber()

						+ SourceConstants.COLON

						+ SourceConstants.SPACE

						+ TraceCompilerEngineErrorMessages.getErrorMessage(

								location.getValidityCode(), location

										.getValidityParameters()), null, true);

	}

	/**

	 * get list of cumulated erros.

	 * 

	 * @return list of TaceLocaion

	 */

	public ArrayList<TraceLocation> getErrors() {

		return errorList;

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.tracecompiler.model.TraceProcessingListener#processingComplete

	 * (boolean)

	 */

	public void processingComplete(boolean changed) {

		printLocationErrors();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.tracecompiler.model.TraceProcessingListener#processingStarted()

	 */

	public void processingStarted() {

	}

}