///////////////////////////////////////////////////////////////////////////////
//
// File: SegExp.h
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Description: Header file for SegExp routines
//
///////////////////////////////////////////////////////////////////////////////

#ifndef SEGEXP_H
#define SEGEXP_H

#include <LocalRegions/Expansion1D.h>
#include <LocalRegions/LocalRegionsDeclspec.h>
#include <LocalRegions/MatrixKey.h>
#include <SpatialDomains/Geometry1D.h>
#include <StdRegions/StdSegExp.h>

// #include <fstream>

namespace Nektar::LocalRegions
{

class SegExp : virtual public StdRegions::StdSegExp, virtual public Expansion1D
{

public:
    LOCAL_REGIONS_EXPORT SegExp(const LibUtilities::BasisKey &Ba,
                                SpatialDomains::Geometry1D *geom);

    LOCAL_REGIONS_EXPORT SegExp(const SegExp &S);

    LOCAL_REGIONS_EXPORT ~SegExp() override = default;

protected:
    //----------------------------
    // Integration Methods
    //----------------------------
    LOCAL_REGIONS_EXPORT NekDouble
    v_Integral(const Array<OneD, const NekDouble> &inarray) override;

    //-----------------------------
    // Differentiation Methods
    //-----------------------------
    LOCAL_REGIONS_EXPORT void v_PhysDeriv(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &out_d0,
        Array<OneD, NekDouble> &out_d1 = NullNekDouble1DArray,
        Array<OneD, NekDouble> &out_d2 = NullNekDouble1DArray) override;

    LOCAL_REGIONS_EXPORT void v_PhysDeriv(
        const int dir, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT void v_PhysDeriv_s(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &out_ds) override;

    LOCAL_REGIONS_EXPORT void v_PhysDeriv_n(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &out_dn) override;

    //-----------------------------
    // Transforms
    //-----------------------------
    LOCAL_REGIONS_EXPORT void v_FwdTrans(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT void v_FwdTransBndConstrained(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    //-----------------------------
    // Inner product functions
    //-----------------------------
    LOCAL_REGIONS_EXPORT void v_IProductWRTBase(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT void v_IProductWRTBase(
        const Array<OneD, const NekDouble> &base,
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray, int coll_check) override;

    LOCAL_REGIONS_EXPORT void v_IProductWRTDerivBase(
        const int dir, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT void v_NormVectorIProductWRTBase(
        const Array<OneD, const NekDouble> &Fx,
        const Array<OneD, const NekDouble> &Fy,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT void v_NormVectorIProductWRTBase(
        const Array<OneD, const Array<OneD, NekDouble>> &Fvec,
        Array<OneD, NekDouble> &outarray) override;

    //-----------------------------
    // Evaluation functions
    //-----------------------------
    LOCAL_REGIONS_EXPORT NekDouble
    v_StdPhysEvaluate(const Array<OneD, const NekDouble> &Lcoord,
                      const Array<OneD, const NekDouble> &physvals) override;

    LOCAL_REGIONS_EXPORT NekDouble
    v_PhysEvaluate(const Array<OneD, const NekDouble> &coord,
                   const Array<OneD, const NekDouble> &physvals) override;

    LOCAL_REGIONS_EXPORT NekDouble
    v_PhysEvalFirstDeriv(const Array<OneD, NekDouble> &coord,
                         const Array<OneD, const NekDouble> &inarray,
                         std::array<NekDouble, 3> &firstOrderDerivs) override;

    LOCAL_REGIONS_EXPORT NekDouble v_PhysEvalFirstSecondDeriv(
        const Array<OneD, NekDouble> &coord,
        const Array<OneD, const NekDouble> &inarray,
        std::array<NekDouble, 3> &firstOrderDerivs,
        std::array<NekDouble, 6> &secondOrderDerivs) override;

    LOCAL_REGIONS_EXPORT void v_GetCoord(
        const Array<OneD, const NekDouble> &Lcoords,
        Array<OneD, NekDouble> &coords) override;

    LOCAL_REGIONS_EXPORT void v_GetCoords(
        Array<OneD, NekDouble> &coords_1, Array<OneD, NekDouble> &coords_2,
        Array<OneD, NekDouble> &coords_3) override;

    LOCAL_REGIONS_EXPORT void v_GetVertexPhysVals(
        const int vertex, const Array<OneD, const NekDouble> &inarray,
        NekDouble &outarray) override;

    LOCAL_REGIONS_EXPORT void v_GetTracePhysVals(
        const int edge, const StdRegions::StdExpansionSharedPtr &EdgeExp,
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray,
        StdRegions::Orientation orient) override;

    LOCAL_REGIONS_EXPORT void v_GetTracePhysMap(const int vertex,
                                                Array<OneD, int> &map) override;
    //-----------------------------
    // Helper functions
    //-----------------------------
    LOCAL_REGIONS_EXPORT StdRegions::StdExpansionSharedPtr v_GetStdExp(
        void) const override;

    LOCAL_REGIONS_EXPORT StdRegions::StdExpansionSharedPtr v_GetLinStdExp(
        void) const override;

    LOCAL_REGIONS_EXPORT void v_SetCoeffsToOrientation(
        StdRegions::Orientation dir, Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    LOCAL_REGIONS_EXPORT int v_NumBndryCoeffs() const override;

    LOCAL_REGIONS_EXPORT int v_NumDGBndryCoeffs() const override;

    LOCAL_REGIONS_EXPORT void v_ComputeTraceNormal(const int vertex) override;

    LOCAL_REGIONS_EXPORT void v_ExtractDataToCoeffs(
        const NekDouble *data, const std::vector<unsigned int> &nummodes,
        const int mode_offset, NekDouble *coeffs,
        std::vector<LibUtilities::BasisType> &fromType) override;

    LOCAL_REGIONS_EXPORT const Array<OneD, const NekDouble> &v_GetPhysNormals()
        override;

    //-----------------------------
    // Operator creation functions
    //-----------------------------
    LOCAL_REGIONS_EXPORT void v_LaplacianMatrixOp(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray,
        const StdRegions::StdMatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT void v_LaplacianMatrixOp(
        const int k1, const int k2, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray,
        const StdRegions::StdMatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT void v_HelmholtzMatrixOp(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray,
        const StdRegions::StdMatrixKey &mkey) override;

    //-----------------------------
    // Matrix creation functions
    //-----------------------------

    LOCAL_REGIONS_EXPORT DNekMatSharedPtr
    v_GenMatrix(const StdRegions::StdMatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT DNekScalMatSharedPtr
    CreateMatrix(const MatrixKey &mkey);

    LOCAL_REGIONS_EXPORT DNekMatSharedPtr
    v_CreateStdMatrix(const StdRegions::StdMatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT DNekScalMatSharedPtr
    v_GetLocMatrix(const MatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT void v_DropLocMatrix(const MatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT DNekScalBlkMatSharedPtr
    v_GetLocStaticCondMatrix(const MatrixKey &mkey) override;

    LOCAL_REGIONS_EXPORT void v_DropLocStaticCondMatrix(
        const MatrixKey &mkey) override;

private:
    LibUtilities::NekManager<MatrixKey, DNekScalMat, MatrixKey::opLess>
        m_matrixManager;
    LibUtilities::NekManager<MatrixKey, DNekScalBlkMat, MatrixKey::opLess>
        m_staticCondMatrixManager;

    LOCAL_REGIONS_EXPORT void ReverseCoeffsAndSign(
        const Array<OneD, NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray);

    /// \todo Same method exists in ExpList and everyone references
    ///       ExpList::MultiplyByElmtInvMass. Remove this one?
    LOCAL_REGIONS_EXPORT void MultiplyByElmtInvMass(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray);
};

typedef std::shared_ptr<SegExp> SegExpSharedPtr;
typedef std::vector<SegExpSharedPtr> SegExpVector;
} // namespace Nektar::LocalRegions

#endif // SEGEXP_H
