///////////////////////////////////////////////////////////////////////////////
//
// File: StdSegExp.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 Standard Segment Expansions
//
///////////////////////////////////////////////////////////////////////////////

#ifndef NEKTAR_LIBS_STDREGIONS_STDSEGEXP_H
#define NEKTAR_LIBS_STDREGIONS_STDSEGEXP_H

#include <StdRegions/StdExpansion1D.h>

namespace Nektar::StdRegions
{
/// Class representing a segment element in reference space
/// All interface of this class sits in StdExpansion class
class StdSegExp : virtual public StdExpansion1D
{
public:
    STD_REGIONS_EXPORT StdSegExp(const LibUtilities::BasisKey &Ba);
    STD_REGIONS_EXPORT StdSegExp(const StdSegExp &T) = default;
    STD_REGIONS_EXPORT ~StdSegExp() override         = default;

protected:
    //-----------------------------
    // Differentiation Methods
    //-----------------------------
    STD_REGIONS_EXPORT void v_StdPhysDeriv(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &out_d0,
        Array<OneD, NekDouble> &out_d1 = NullNekDouble1DArray,
        Array<OneD, NekDouble> &out_d2 = NullNekDouble1DArray) override;

    //-----------------------------
    // Transforms
    //-----------------------------
    STD_REGIONS_EXPORT void v_BwdTrans(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;
    STD_REGIONS_EXPORT void v_FwdTransBndConstrained(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    //----------------------------
    // Inner product functions
    //----------------------------
    STD_REGIONS_EXPORT void v_IProductWRTBaseKernel(
        const Array<OneD, const NekDouble> &base0,
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray,
        const Array<OneD, const NekDouble> &jac, const bool Deformed) override;
    STD_REGIONS_EXPORT void v_IProductWRTDerivBase(
        const int dir, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;

    //----------------------------
    // Evaluations Methods
    //---------------------------
    STD_REGIONS_EXPORT void v_LocCoordToLocCollapsed(
        const Array<OneD, const NekDouble> &xi,
        Array<OneD, NekDouble> &eta) override;
    STD_REGIONS_EXPORT void v_LocCollapsedToLocCoord(
        const Array<OneD, const NekDouble> &eta,
        Array<OneD, NekDouble> &xi) override;
    STD_REGIONS_EXPORT NekDouble v_PhysEvaluateBasis(
        const Array<OneD, const NekDouble> &coords, int mode) final;
    STD_REGIONS_EXPORT NekDouble
    v_PhysEvalFirstDeriv(const Array<OneD, NekDouble> &coord,
                         const Array<OneD, const NekDouble> &inarray,
                         std::array<NekDouble, 3> &firstOrderDerivs) override;
    STD_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;
    STD_REGIONS_EXPORT void v_LaplacianMatrixOp(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray, const StdMatrixKey &mkey) override;
    STD_REGIONS_EXPORT void v_LaplacianMatrixOp(
        const int k1, const int k2, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray, const StdMatrixKey &mkey) override;
    STD_REGIONS_EXPORT void v_HelmholtzMatrixOp(
        const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray, const StdMatrixKey &mkey) override;
    STD_REGIONS_EXPORT void v_SVVLaplacianFilter(
        Array<OneD, NekDouble> &array, const StdMatrixKey &mkey) override;
    STD_REGIONS_EXPORT void v_ExponentialFilter(
        Array<OneD, NekDouble> &array, const NekDouble alpha,
        const NekDouble exponent, const NekDouble cutoff) override;
    STD_REGIONS_EXPORT void v_FillMode(
        const int mode, Array<OneD, NekDouble> &outarray) override;
    STD_REGIONS_EXPORT void v_GetCoords(
        Array<OneD, NekDouble> &coords_0, Array<OneD, NekDouble> &coords_1,
        Array<OneD, NekDouble> &coords_2) override;

    //----------------------------
    // Public Mappings
    //---------------------------
    STD_REGIONS_EXPORT void v_GetBoundaryMap(
        Array<OneD, unsigned int> &outarray) override;
    STD_REGIONS_EXPORT void v_GetInteriorMap(
        Array<OneD, unsigned int> &outarray) override;
    STD_REGIONS_EXPORT int v_GetVertexMap(
        int localVertexId, bool useCoeffPacking = false) override;

    //----------------------------
    // Helper functions
    //---------------------------
    STD_REGIONS_EXPORT int v_GetNverts() const final;
    STD_REGIONS_EXPORT int v_GetNtraces() const final;
    STD_REGIONS_EXPORT int v_GetTraceNcoeffs(const int i) const final;
    STD_REGIONS_EXPORT int v_GetTraceIntNcoeffs(const int i) const final;
    STD_REGIONS_EXPORT int v_GetTraceNumPoints(const int i) const final;
    STD_REGIONS_EXPORT int v_NumBndryCoeffs() const override;
    STD_REGIONS_EXPORT int v_NumDGBndryCoeffs() const override;
    STD_REGIONS_EXPORT bool v_IsBoundaryInteriorExpansion() const override;
    STD_REGIONS_EXPORT int v_CalcNumberOfCoefficients(
        const std::vector<unsigned int> &nummodes, int &modes_offset) override;
    STD_REGIONS_EXPORT LibUtilities::ShapeType v_DetShapeType() const override;

    //----------------------------
    // Wrapper functions
    //---------------------------
    STD_REGIONS_EXPORT DNekMatSharedPtr
    v_GenMatrix(const StdMatrixKey &mkey) override;
    STD_REGIONS_EXPORT DNekMatSharedPtr
    v_CreateStdMatrix(const StdMatrixKey &mkey) override;

    //---------------------------------------
    // Output interpolation functions
    //---------------------------------------
    STD_REGIONS_EXPORT void v_GetSimplexEquiSpacedConnectivity(
        Array<OneD, int> &conn, bool standard = true) override;

    //---------------------------------------
    // Operator evaluation functions
    //---------------------------------------
    STD_REGIONS_EXPORT void v_ReduceOrderCoeffs(
        int numMin, const Array<OneD, const NekDouble> &inarray,
        Array<OneD, NekDouble> &outarray) override;
    STD_REGIONS_EXPORT void v_GetTraceCoeffMap(
        const unsigned int traceid,
        Array<OneD, unsigned int> &maparray) override;
    STD_REGIONS_EXPORT void v_GetElmtTraceToTraceMap(
        const unsigned int eid, Array<OneD, unsigned int> &maparray,
        Array<OneD, int> &signarray, Orientation edgeOrient, int P,
        int Q) override;
    STD_REGIONS_EXPORT void v_GetTraceToElementMap(
        const int tid, Array<OneD, unsigned int> &maparray,
        Array<OneD, int> &signarray, Orientation edgeOrient, int P,
        int Q) override;

private:
};
typedef std::shared_ptr<StdSegExp> StdSegExpSharedPtr;

} // namespace Nektar::StdRegions

#endif // STDSEGEXP_H
