/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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: 

 *

 */

package com.nokia.carbide.cpp.pi.power;

import java.io.ByteArrayInputStream;

import java.io.DataInputStream;

import java.io.EOFException;

import java.io.File;

import java.io.FileInputStream;

import java.util.Vector;

import com.nokia.carbide.cpp.internal.pi.model.GenericTrace;

import com.nokia.carbide.cpp.internal.pi.model.ParsedTraceData;

import com.nokia.carbide.cpp.internal.pi.model.Parser;

import com.nokia.carbide.cpp.pi.util.GeneralMessages;

public class PwrTraceParser extends Parser

{

	private boolean debug = false;

	private PwrSample[] traceData;	

	public PwrTraceParser() throws Exception

	{

	}

	public PwrTraceParser(File file) throws Exception

	{

		if (!file.exists() || file.isDirectory())

		{

			throw new Exception(Messages.getString("PwrTraceParser.cannotOpenTraceFile")); //$NON-NLS-1$

		}

		FileInputStream fis = new FileInputStream(file);

		byte[] data = new byte[(int)file.length()];

		fis.read(data);

		this.traceVersion = this.getVersion(data);

		System.out.println(Messages.getString("PwrTraceParser.powerVersion") + this.traceVersion); //$NON-NLS-1$

		if (traceVersion.indexOf("V1.57") != -1) //$NON-NLS-1$

		    this.parse(file);

		else

		    System.out.println(Messages.getString("PwrTraceParser.unsupportedVersion") + this.traceVersion); //$NON-NLS-1$

		fis.close();

	}

	public ParsedTraceData parse(File file) throws Exception 

	{

		if (!file.exists() || file.isDirectory())

		{

			throw new Exception(Messages.getString("PwrTraceParser.cannotOpenTraceFile")); //$NON-NLS-1$

		}

		Vector intermediateTraceData = new Vector();

		try 

		{

			FileInputStream fis = new FileInputStream(file);

			byte[] data = new byte[(int)file.length()];

			fis.read(data);

			this.traceVersion = this.getVersion(data);

			System.out.println(Messages.getString("PwrTraceParser.powerVersion") + this.traceVersion); //$NON-NLS-1$

			if (traceVersion.indexOf("V1.57") == -1) //$NON-NLS-1$

			{

			    System.out.println(Messages.getString("PwrTraceParser.unsupportedVersion") + this.traceVersion); //$NON-NLS-1$

			    fis.close();

			    return null;

			}

			ByteArrayInputStream bais = new ByteArrayInputStream(data);

			DataInputStream dis = new DataInputStream(bais);

			// read the length of the header

			int length = dis.readByte();

			// skip the header

			for (int i = 0; i < length; i++)

				dis.readByte();

			long voltage = 0;

			long current = 0;

			long capacity = 0;

			long sampleTime = 0;

			try

			{

				while(true)

				{

					capacity = readTUint16(dis);

					voltage = readTUint16(dis);

					current = readTUint(dis);

					sampleTime = readTUint(dis);

					PwrSample sample = new PwrSample(sampleTime, current, voltage, capacity);

					intermediateTraceData.add(sample);

				}

			}

			catch (EOFException eof)

			{

				//return;

			}

			catch (Exception e)

			{

				GeneralMessages.showErrorMessage(Messages.getString("PwrTraceParser.errorReadingTraceFile")); //$NON-NLS-1$

				throw e;				

			}

		}

		catch (Exception e)

		{

			GeneralMessages.showErrorMessage(Messages.getString("PwrTraceParser.errorReadingTraceFile")); //$NON-NLS-1$

			throw e;				

		}

		if (debug) System.out.println(Messages.getString("PwrTraceParser.traceFileParsed") + intermediateTraceData.size()); //$NON-NLS-1$

		// all samples have been parsed

		intermediateTraceData.trimToSize();

		this.traceData = new PwrSample[intermediateTraceData.size()];

		// store the trace data into an array

		intermediateTraceData.toArray(this.traceData);

		ParsedTraceData ptd = new ParsedTraceData();

		ptd.traceData = this.getTrace();

		return ptd;

	}

	private String getVersion(byte[] data)

	{

		int length = data[0];

		String ver = Messages.getString("PwrTraceParser.unknown"); //$NON-NLS-1$

		String verString = new String(data, 1, length);

		if (debug)

			System.out.println(Messages.getString("PwrTraceParser.versionStringDebug") + verString); //$NON-NLS-1$

		if(verString.indexOf("Bappea") != -1) //$NON-NLS-1$

			if(verString.indexOf("PWR") != -1) //$NON-NLS-1$

			{

				int index = verString.indexOf("_"); //$NON-NLS-1$

				ver = verString.substring(index + 1, length);

			}

		return ver;

	}		

	private long readTUint(DataInputStream dis) throws Exception

	{

		long result = dis.readUnsignedByte();

		result += dis.readUnsignedByte() << 8;

		result += dis.readUnsignedByte() << 16;

		result += dis.readUnsignedByte() << 24;

		return result;

	}

	private long readTUint16(DataInputStream dis) throws Exception

	{

		int result = dis.readUnsignedByte();

		result += dis.readUnsignedByte() << 8;

		return result;

	}

	private GenericTrace getTrace()

	{

		PwrTrace trace = new PwrTrace();

		for (int i = 0; i < traceData.length; i++)

		{

			trace.addSample(this.traceData[i]);

		}

		return trace;

	}

    public static void main( String[] args ) 

    {

	    try {

	        PwrTraceParser p = new PwrTraceParser(new File(Messages.getString("PwrTraceParser.tmpFilePath"))); //$NON-NLS-1$

	    } catch ( Exception  e ) {

	        System.out.println(Messages.getString("PwrTraceParser.exceptionMessage") + e.getMessage() ); //$NON-NLS-1$

	    }

    }

}