///////////////////////////////////////////////////////////////////////////////
//
// File: ForcingAbsorption.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: Absorption layer forcing.
//
///////////////////////////////////////////////////////////////////////////////

#ifndef NEKTAR_SOLVERUTILS_FORCINGABSORPTION
#define NEKTAR_SOLVERUTILS_FORCINGABSORPTION

#include <string>

#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point.hpp>
#include <boost/geometry/index/rtree.hpp>

#include <LibUtilities/BasicUtils/NekFactory.hpp>
#include <LibUtilities/BasicUtils/SharedArray.hpp>
#include <MultiRegions/ExpList.h>
#include <SolverUtils/Forcing/Forcing.h>
#include <SolverUtils/SolverUtilsDeclspec.h>

namespace bg  = boost::geometry;
namespace bgi = boost::geometry::index;

namespace Nektar::SolverUtils
{
class ForcingAbsorption : public Forcing
{
public:
    friend class MemoryManager<ForcingAbsorption>;

    /// Creates an instance of this class
    SOLVER_UTILS_EXPORT static ForcingSharedPtr create(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const std::weak_ptr<EquationSystem> &pEquation,
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const unsigned int &pNumForcingFields, const TiXmlElement *pForce)
    {
        ForcingSharedPtr p =
            MemoryManager<ForcingAbsorption>::AllocateSharedPtr(pSession,
                                                                pEquation);
        p->InitObject(pFields, pNumForcingFields, pForce);
        return p;
    }

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

protected:
    typedef bg::model::point<NekDouble, 3, bg::cs::cartesian> BPoint;
    typedef std::pair<BPoint, unsigned int> BPointPair;
    typedef bgi::rtree<BPointPair, bgi::rstar<16>> BRTree;

    bool m_hasRefFlow;
    bool m_hasRefFlowTime;
    Array<OneD, Array<OneD, NekDouble>> m_Absorption;
    Array<OneD, Array<OneD, NekDouble>> m_Refflow;
    std::string m_funcNameTime;
    std::vector<unsigned int> m_bRegions;
    std::shared_ptr<BRTree> m_rtree;

    void CalculateForcing(
        const Array<OneD, MultiRegions::ExpListSharedPtr> &fields,
        const Array<OneD, Array<OneD, NekDouble>> &inarray,
        const NekDouble &time);

    SOLVER_UTILS_EXPORT void v_InitObject(
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const unsigned int &pNumForcingFields,
        const TiXmlElement *pForce) override;

    SOLVER_UTILS_EXPORT void v_Apply(
        const Array<OneD, MultiRegions::ExpListSharedPtr> &fields,
        const Array<OneD, Array<OneD, NekDouble>> &inarray,
        Array<OneD, Array<OneD, NekDouble>> &outarray,
        const NekDouble &time) override;

    SOLVER_UTILS_EXPORT void v_ApplyCoeff(
        const Array<OneD, MultiRegions::ExpListSharedPtr> &fields,
        const Array<OneD, Array<OneD, NekDouble>> &inarray,
        Array<OneD, Array<OneD, NekDouble>> &outarray,
        const NekDouble &time) override;

private:
    // Save whether the basis contains a homogeneous expansion
    bool m_homogeneous;
    ForcingAbsorption(const LibUtilities::SessionReaderSharedPtr &pSession,
                      const std::weak_ptr<EquationSystem> &pEquation);
    ~ForcingAbsorption(void) override = default;

    void CalcAbsorption(
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const TiXmlElement *pForce);
};

} // namespace Nektar::SolverUtils
#endif
