///////////////////////////////////////////////////////////////////////////////
//
// File: EnforceEntropyVelocity.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).
//
// License for the specific language governing rights and limitations under
// 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: Modified Riemann invariant boundary condition.
//              Enforce the entropy and velocity at the inflow boundary;
//              Enforce the Riemann invariant at the outflow boundary.
//              The input can be either VALUE or FILE.
//
///////////////////////////////////////////////////////////////////////////////

#ifndef NEKTAR_SOLVERS_COMPRESSIBLEFLOWSOLVER_BNDCOND_ENFORCEENTROPYVELOCITY
#define NEKTAR_SOLVERS_COMPRESSIBLEFLOWSOLVER_BNDCOND_ENFORCEENTROPYVELOCITY

#include "CFSBndCond.h"

namespace Nektar
{

/**
 * @brief Outflow characteristic boundary conditions for compressible
 * flow problems.
 */
class EnforceEntropyVelocity : public CFSBndCond
{
public:
    friend class MemoryManager<EnforceEntropyVelocity>;

    /// Creates an instance of this class
    static CFSBndCondSharedPtr create(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const Array<OneD, Array<OneD, NekDouble>> &pTraceNormals,
        const int pSpaceDim, const int bcRegion, const int cnt)
    {
        CFSBndCondSharedPtr p =
            MemoryManager<EnforceEntropyVelocity>::AllocateSharedPtr(
                pSession, pFields, pTraceNormals, pSpaceDim, bcRegion, cnt);
        return p;
    }

    /// Name of the class
    static std::string className;

protected:
    int m_npts;
    // Reference rho on boundary
    Array<OneD, NekDouble> m_rhoBC;
    // Reference Velocity on BC
    Array<OneD, Array<OneD, NekDouble>> m_velBC;
    // Reference pressure on boundary
    Array<OneD, NekDouble> m_pBC;
    /// Reference normal velocity
    Array<OneD, NekDouble> m_VnInf;
    // Mapping from boundary to Trace values
    Array<OneD, int> m_bndToTraceMap;

    // Arrays of arrays pointing to the boundary condition physical
    // space for the specified region.
    Array<OneD, Array<OneD, NekDouble>> m_bndPhys;

    void v_Apply(Array<OneD, Array<OneD, NekDouble>> &Fwd,
                 Array<OneD, Array<OneD, NekDouble>> &physarray,
                 const NekDouble &time) override;

    void GenerateRotationMatrices(
        const Array<OneD, const Array<OneD, NekDouble>> &normals);

    void FromToRotation(Array<OneD, const NekDouble> &from,
                        Array<OneD, const NekDouble> &to, NekDouble *mat);

    SOLVER_UTILS_EXPORT void rotateToNormal(
        const Array<OneD, const Array<OneD, NekDouble>> &inarray,
        const Array<OneD, const Array<OneD, NekDouble>> &normals,
        const Array<OneD, const Array<OneD, NekDouble>> &vecLocs,
        Array<OneD, Array<OneD, NekDouble>> &outarray);

    SOLVER_UTILS_EXPORT void rotateFromNormal(
        const Array<OneD, const Array<OneD, NekDouble>> &inarray,
        const Array<OneD, const Array<OneD, NekDouble>> &normals,
        const Array<OneD, const Array<OneD, NekDouble>> &vecLocs,
        Array<OneD, Array<OneD, NekDouble>> &outarray);

private:
    EnforceEntropyVelocity(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const Array<OneD, Array<OneD, NekDouble>> &pTraceNormals,
        const int pSpaceDim, const int bcRegion, const int cnt);

    ~EnforceEntropyVelocity(void) override{};
};

} // namespace Nektar

#endif
