/***************************************************************************
                          milkyway.cpp  -  K Desktop Planetarium
                             -------------------
    begin                : 12 Nov. 2005
    copyright            : (C) 2005 by Jason Harris
    email                : kstars@30doradus.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 "milkyway.h"

#include <QList>
#include <QPointF>
#include <QPolygonF>
#include <QPainter>

#include <klocale.h>

#include "kstarsdata.h"
#include "skymap.h"
#include "skypoint.h"
#include "dms.h"
#include "Options.h"
#include "ksfilereader.h"

#include "skymesh.h"


MilkyWay::MilkyWay( SkyComponent *parent ) :
        SkipListIndex( parent, i18n("Milky Way") )
{}

void MilkyWay::init( KStarsData *data )
{
    Q_UNUSED(data)

    intro();

    const char* fname = "milkyway.dat";
    QString line;
    double ra, dec, lastRa, lastDec;
    SkipList *skipList = 0;
    bool ok;
    int iSkip = 0;

    lastRa = lastDec = -1000.0;

    KSFileReader fileReader;
    if ( ! fileReader.open( fname ) ) return;

    fileReader.setProgress( i18n("Loading Milky Way"), 2136, 5 );

    while ( fileReader.hasMoreLines() ) {
        line = fileReader.readLine();

        fileReader.showProgress();

        QChar firstChar = line.at( 0 );
        if ( firstChar == '#' ) continue;

        ra = line.mid( 2, 8 ).toDouble(&ok);
        if ( ok ) dec = line.mid( 11, 8 ).toDouble(&ok);
        if ( !ok ) {
            fprintf(stderr, "%s: conversion error on line: %d\n",
                    fname, fileReader.lineNumber());
            continue;
        }

        if ( firstChar == 'M' )  {
            if (  skipList )  appendBoth( skipList );
            skipList = 0;
            iSkip = 0;
            lastRa = lastDec = -1000.0;
        }

        if ( ! skipList ) skipList = new SkipList();

        if ( ra == lastRa && dec == lastDec ) {
            fprintf(stderr, "%s: tossing dupe on line %4d: (%f, %f)\n",
                    fname, fileReader.lineNumber(), ra, dec);
            continue;
        }

        skipList->append( new SkyPoint(ra, dec) );
        lastRa = ra;
        lastDec = dec;
        if ( firstChar == 'S' ) skipList->setSkip( iSkip );
        iSkip++;
    }
    if ( skipList ) appendBoth( skipList );

    summary();
    //printf("Done.\n");
}

bool MilkyWay::selected()
{
    return Options::showMilkyWay() &&
           ! ( Options::hideOnSlew() && Options::hideMilkyWay() && SkyMap::IsSlewing() );
}

void MilkyWay::draw( QPainter& psky )
{
    if ( !selected() ) return;

    KStarsData *data = KStarsData::Instance();

    QColor color =  QColor( data->colorScheme()->colorNamed( "MWColor" ) );

    psky.setPen( QPen( color, 3, Qt::SolidLine ) );
    psky.setBrush( QBrush( color ) );

    // Uncomment these two lines to get more visible images for debugging.  -jbb
    //
    //psky.setPen( QPen( QColor( "red" ), 1, Qt::SolidLine ) );
    //psky.setBrush( QBrush( QColor("green"  ) ) );

    if ( Options::fillMilkyWay() ) {
        drawFilled( psky );
    }
    else {
        drawLines( psky );
    }
}

