/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) Statoil ASA
//  Copyright (C) Ceetron Solutions AS
//
//  ResInsight 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 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
//
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "RivTextureCoordsCreator.h"

#include "RigCaseCellResultsData.h"
#include "RigEclipseCaseData.h"
#include "RigPipeInCellEvaluator.h"
#include "RigResultAccessorFactory.h"

#include "RimEclipseCase.h"
#include "RimEclipseCellColors.h"
#include "RimEclipseView.h"
#include "RimRegularLegendConfig.h"
#include "RimSimWellInViewCollection.h"

#include "RivDefaultResultToTextureMapper.h"
#include "RivResultToTextureMapper.h"

#include "cvfStructGridGeometryGenerator.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
RivTextureCoordsCreator::RivTextureCoordsCreator( RimEclipseCellColors*                      cellResultColors,
                                                  size_t                                     timeStepIndex,
                                                  size_t                                     gridIndex,
                                                  const cvf::StructGridQuadToCellFaceMapper* quadMapper )
{
    RigEclipseCaseData* eclipseCase = cellResultColors->reservoirView()->eclipseCase()->eclipseCaseData();

    m_quadMapper = quadMapper;
    CVF_ASSERT( quadMapper && eclipseCase );

    m_resultAccessor = RigResultAccessorFactory::createFromResultDefinition( eclipseCase, gridIndex, timeStepIndex, cellResultColors );

    cvf::ref<RigPipeInCellEvaluator> pipeInCellEval = createPipeInCellEvaluator( cellResultColors, timeStepIndex, gridIndex );

    const cvf::ScalarMapper* mapper = cellResultColors->legendConfig()->scalarMapper();

    m_texMapper = new RivDefaultResultToTextureMapper( mapper, pipeInCellEval.p() );
    CVF_ASSERT( m_texMapper.notNull() );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RivTextureCoordsCreator::isValid()
{
    return !( m_quadMapper.isNull() || m_resultAccessor.isNull() || m_texMapper.isNull() );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RivTextureCoordsCreator::createTextureCoords( cvf::Vec2fArray* quadTextureCoords )
{
    createTextureCoords( quadTextureCoords, m_quadMapper.p(), m_resultAccessor.p(), m_texMapper.p() );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RivTextureCoordsCreator::setResultToTextureMapper( RivResultToTextureMapper* textureMapper )
{
    m_texMapper = textureMapper;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
RigPipeInCellEvaluator* RivTextureCoordsCreator::createPipeInCellEvaluator( RimEclipseCellColors* cellColors, size_t timeStep, size_t gridIndex )
{
    return new RigPipeInCellEvaluator( cellColors->reservoirView()->wellCollection()->resultWellGeometryVisibilities( timeStep ),
                                       cellColors->reservoirView()->eclipseCase()->eclipseCaseData()->gridCellToResultWellIndex( gridIndex ) );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RivTextureCoordsCreator::createTextureCoords( cvf::Vec2fArray*                           quadTextureCoords,
                                                   const cvf::StructGridQuadToCellFaceMapper* quadMapper,
                                                   const RigResultAccessor*                   resultAccessor,
                                                   const RivResultToTextureMapper*            texMapper )
{
    CVF_ASSERT( quadTextureCoords && quadMapper && resultAccessor && texMapper );

    size_t numVertices = quadMapper->quadCount() * 4;
    quadTextureCoords->resize( numVertices );
    cvf::Vec2f* rawPtr = quadTextureCoords->ptr();

#pragma omp parallel for
    for ( int i = 0; i < static_cast<int>( quadMapper->quadCount() ); i++ )
    {
        cvf::StructGridInterface::FaceType faceId  = quadMapper->cellFace( i );
        size_t                             cellIdx = quadMapper->cellIndex( i );

        double     resultValue = resultAccessor->cellFaceScalar( cellIdx, faceId );
        cvf::Vec2f texCoord    = texMapper->getTexCoord( resultValue, cellIdx );

        size_t j;
        for ( j = 0; j < 4; j++ )
        {
            rawPtr[i * 4 + j] = texCoord;
        }
    }
}