/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2018-     Equinor ASA
//
//  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.
//
/////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "cvfArray.h"
#include "cvfColor3.h"
#include "cvfObject.h"
#include "cvfVector3.h"

#include "cafPdmPointer.h"
#include "cafTensor3.h"

#include "RimTensorResults.h"

#include <array>
#include <vector>

namespace cvf
{
class ModelBasicList;
class Part;
class ScalarMapper;
class ScalarMapperDiscreteLinear;
} // namespace cvf

class RigFemResultAddress;
class RimGeoMechView;
class RigFemPartNodes;
class RigFemPart;

class RivTensorResultPartMgr : public cvf::Object
{
public:
    RivTensorResultPartMgr( RimGeoMechView* reservoirView );
    ~RivTensorResultPartMgr() override;

    void appendDynamicGeometryPartsToModel( cvf::ModelBasicList* model, int viewerStepIndex, int localTimeStepIndex, int frameIndex ) const;

private:
    struct TensorVisualization
    {
        TensorVisualization( cvf::Vec3f vertex, cvf::Vec3f result, cvf::Vec3f faceNormal, bool isPressure, int princial, float principalValue )
            : vertex( vertex )
            , result( result )
            , faceNormal( faceNormal )
            , isPressure( isPressure )
            , principalNumber( princial )
            , principalValue( principalValue ){};

        cvf::Vec3f vertex;
        cvf::Vec3f result;
        cvf::Vec3f faceNormal;
        bool       isPressure;
        int        principalNumber;
        float      principalValue;
    };

private:
    static void
        calculateElementTensors( const RigFemPart& part, const std::vector<caf::Ten3f>& vertexTensors, std::vector<caf::Ten3f>* elmTensors );

    static void calculatePrincipalsAndDirections( const std::vector<caf::Ten3f>&          tensors,
                                                  std::array<std::vector<float>, 3>*      principals,
                                                  std::vector<std::array<cvf::Vec3f, 3>>* principalDirections );

    static cvf::Vec3f
        calculateFaceNormal( const RigFemPartNodes& nodes, const std::vector<size_t>& quadVerticesToNodeIdxMapping, int quadVertex );

    cvf::ref<cvf::Part> createPart( const std::vector<TensorVisualization>& tensorVisualizations ) const;

    static void createOneColorPerPrincipalScalarMapper( const RimTensorResults::TensorColors& colorSet,
                                                        cvf::ScalarMapperDiscreteLinear*      scalarMapper );
    static void createOneColorPerPrincipalTextureCoords( cvf::Vec2fArray*                        textureCoords,
                                                         const std::vector<TensorVisualization>& tensorVisualizations,
                                                         const cvf::ScalarMapper*                mapper );

    static void createResultColorTextureCoords( cvf::Vec2fArray*                        textureCoords,
                                                const std::vector<TensorVisualization>& tensorVisualizations,
                                                const cvf::ScalarMapper*                mapper );

    static bool isTensorAddress( RigFemResultAddress address );
    static bool isValid( cvf::Vec3f resultVector );
    static bool isPressure( float principalValue );
    bool        isDrawable( cvf::Vec3f resultVector, bool showPrincipal ) const;

    std::array<cvf::Vec3f, 5> createArrowVertices( const TensorVisualization& tensorVisualization ) const;
    std::array<uint, 8>       createArrowIndices( uint startIndex ) const;

private:
    caf::PdmPointer<RimGeoMechView> m_rimReservoirView;
};