/***************************************************************************
copyright            : (C) 2005, 2008 by Carsten Niehaus
email                : cniehaus@kde.org
 ***************************************************************************/
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "spectrumparser.h"
#include "spectrum.h"

#include <qdom.h>
#include <QList>
#include <QFile>
#include <QDebug>

class SpectrumParser::Private
{
    public:
        Private()
            : currentSpectrum(0),
            inMetadata_(false),
            inSpectrum_(false),
            inSpectrumList_(false),
            inPeakList_(false),
            inPeak_(false)
    {}

        ~Private()
        {
            delete currentSpectrum;
            delete currentPeak;
        }

        Spectrum * currentSpectrum;
        Spectrum::peak * currentPeak;

        bool inMetadata_;
        bool inSpectrum_;
        bool inSpectrumList_;
        bool inPeakList_;
        bool inPeak_;

        double wavelenght;
        int intensity;

        QList<Spectrum*> spectra;
};

SpectrumParser::SpectrumParser()
	: QXmlDefaultHandler(), d( new Private )
{
}

SpectrumParser::~SpectrumParser()
{
    delete d;
}

bool SpectrumParser::startElement(const QString&, const QString &localName, const QString&, const QXmlAttributes &attrs)
{
	if (localName == "spectrum")
	{
		d->currentSpectrum = new Spectrum();
		d->inSpectrum_ = true;

		//now save the element of the current spectrum
		for (int i = 0; i < attrs.length(); ++i)
		{
                    if ( attrs.localName( i ) == "id" ) {
                        currentElementID = attrs.value( i );
                    }
		}
	} else if (d->inSpectrum_ && localName == "peakList") {
		d->inPeakList_ = true;
	}
	else if (d->inSpectrum_ && d->inPeakList_ && localName == "peak") {
		d->inPeak_ = true;
		for (int i = 0; i < attrs.length(); ++i)
		{
			if (attrs.localName(i) == "xValue"){
                                d->intensity = attrs.value(i).toInt();
                        }
                        else if (attrs.localName(i) == "yValue"){
                                d->wavelenght = attrs.value(i).toDouble();
                        }
		}
                d->currentPeak = new Spectrum::peak(d->wavelenght, d->intensity);
	}
	return true;
}

bool SpectrumParser::endElement( const QString&, const QString& localName, const QString& )
{
	if ( localName == "spectrum" )
	{
            int num = currentElementID.mid(1).toInt();
            d->currentSpectrum->setParentElementNumber( num );

            d->spectra.append( d->currentSpectrum );

            d->currentSpectrum = 0;
            d->inSpectrum_ = false;
	}
        else if ( localName == "peakList" ) {
            d->inSpectrumList_ = false;
        }
        else if ( localName == "peak" ) {
//X             qDebug() << "in 'peak'" << " with this data: " << d->currentPeak->intensity << " (intesity)" ;
            d->currentSpectrum->addPeak(d->currentPeak);
            d->inPeak_ = false;
        }
	return true;
}

bool SpectrumParser::characters(const QString &ch)
{
    Q_UNUSED(ch)
    return true;
}

QList<Spectrum*> SpectrumParser::getSpectrums()
{
	return d->spectra;
}