/******************************************************************************
 * QSkinny - Copyright (C) 2016 Uwe Rathmann
 * This file may be used under the terms of the 3-clause BSD License
 *****************************************************************************/

#include "Benchmark.h"

#include <QskGraphic.h>
#include <QskGraphicIO.h>
#include <QskColorFilter.h>
#include <QskTextureRenderer.h>

#include <QDebug>
#include <QDir>
#include <QElapsedTimer>
#include <QPainter>
#include <QQuickWindow>
#include <QStringList>
#include <QSvgRenderer>

bool Benchmark::run( const QString& dirName )
{
    QDir svgDir( dirName );

    QStringList svgFiles = svgDir.entryList( QStringList() << "*.svg", QDir::Files );
    if ( svgFiles.isEmpty() )
        return false;

    const char qvgPath[] = "/tmp/benchmark/qvg";
    if ( !svgDir.mkpath( qvgPath ) )
        return false;

    QStringList qvgFiles = svgFiles;
    for ( int i = 0; i < qvgFiles.size(); i++ )
    {
        svgFiles[ i ].prepend( "/" );
        svgFiles[ i ].prepend( dirName );

        qvgFiles[ i ].replace( ".svg", ".qvg" );
        qvgFiles[ i ].prepend( "/" );
        qvgFiles[ i ].prepend( qvgPath );
    }

    QVector< QskGraphic > graphics( qvgFiles.size() );
    QVector< QSvgRenderer* > renderers( svgFiles.size() );

    qint64 msElapsed[ 6 ];

    QElapsedTimer timer;

    {
        // compile step

        timer.start();

        for ( int i = 0; i < svgFiles.size(); i++ )
        {
            renderers[ i ] = new QSvgRenderer();
            if ( !renderers[ i ]->load( svgFiles[ i ] ) )
            {
                qCritical() << "Can't load" << svgFiles[ i ];
                return false;
            }
        }

        msElapsed[ 0 ] = timer.elapsed();
    }

    {
        // converting into graphics and storing to disk

        timer.start();

        for ( int i = 0; i < renderers.size(); i++ )
        {
            QPainter painter( &graphics[ i ] );
            renderers[ i ]->render( &painter );
            painter.end();
        }

        msElapsed[ 1 ] = timer.elapsed();
    }

    {
        // writing them to disk

        timer.start();

        for ( int i = 0; i < graphics.size(); i++ )
        {
            QskGraphicIO::write( graphics[ i ], qvgFiles[ i ] );
        }

        msElapsed[ 2 ] = timer.elapsed();
    }

    {
        // loading qvg files to memory

        timer.start();

        for ( int i = 0; i < qvgFiles.size(); i++ )
        {
            graphics[ i ] = QskGraphicIO::read( qvgFiles[ i ] );
            if ( graphics[ i ].isNull() )
            {
                qCritical() << "Can't load" << qvgFiles[ i ];
                return false;
            }
        }

        msElapsed[ 3 ] = timer.elapsed();
    }

    {
        // creating textures using OpenGL

        timer.start();

        const QSize targetSize( 200, 200 );
        const QskColorFilter colorFilter;

        for ( int i = 0; i < qvgFiles.size(); i++ )
        {
            using namespace QskTextureRenderer;

            const auto textureId = createTextureFromGraphic(
                OpenGL, targetSize, graphics[ i ], colorFilter,
                Qt::IgnoreAspectRatio );

            if ( textureId == 0 )
            {
                qCritical() << "Can't render texture for" << qvgFiles[ i ];
                return false;
            }
        }

        msElapsed[ 4 ] = timer.elapsed();
    }

    {
        // creating textures using Raster

        timer.start();

        const QSize targetSize( 200, 200 );
        const QskColorFilter colorFilter;

        for ( int i = 0; i < qvgFiles.size(); i++ )
        {
            using namespace QskTextureRenderer;

            const auto textureId = createTextureFromGraphic(
                Raster, targetSize, graphics[ i ], colorFilter,
                Qt::IgnoreAspectRatio );

            if ( textureId == 0 )
            {
                qCritical() << "Can't render texture for" << qvgFiles[ i ];
                return false;
            }
        }

        msElapsed[ 5 ] = timer.elapsed();
    }

    qDebug() << "#Icons:" << svgFiles.count() <<
        "Compiled:" << msElapsed[ 0 ] <<
        "Converted:" << msElapsed[ 1 ] <<
        "Stored:" << msElapsed[ 2 ] <<
        "Loaded:" << msElapsed[ 3 ] <<
        "Rendered OpenGL:" << msElapsed[ 4 ] <<
        "Rendered Raster:" << msElapsed[ 5 ];

    svgDir.rmdir( qvgPath );

    return true;
}