/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2013-2016 OpenFOAM Foundation
    Copyright (C) 2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM 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.

    OpenFOAM 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
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::cyclicACMIFvPatch

Description
    Cyclic patch for Arbitrarily Coupled Mesh Interface (ACMI)

SourceFiles
    cyclicACMIFvPatch.C

\*---------------------------------------------------------------------------*/

#ifndef cyclicACMIFvPatch_H
#define cyclicACMIFvPatch_H

#include "coupledFvPatch.H"
#include "cyclicACMILduInterface.H"
#include "cyclicACMIPolyPatch.H"
#include "fvBoundaryMesh.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                      Class cyclicACMIFvPatch Declaration
\*---------------------------------------------------------------------------*/

class cyclicACMIFvPatch
:
    public coupledFvPatch,
    public cyclicACMILduInterface
{
    // Private data

        const cyclicACMIPolyPatch& cyclicACMIPolyPatch_;

        //- Flag to detect whether AMI is up to date with mesh points
        mutable uniformDimensionedScalarField areaTime_;



protected:

    // Protected Member functions

        //- Update the AMI and patch areas. Return true if anything updated
        virtual bool updateAreas() const;

        //- Helper function to reset the FV patch areas from the primitive patch
        void resetPatchAreas(const fvPatch& fvp) const;

        //- Make patch weighting factors
        void makeWeights(scalarField&) const;

        //- Correct patches after moving points
        virtual void movePoints();


public:

    //- Runtime type information
    TypeName(cyclicACMIPolyPatch::typeName_());


    // Constructors

        //- Construct from polyPatch
        cyclicACMIFvPatch(const polyPatch& patch, const fvBoundaryMesh& bm);


    // Member functions

//         // Implicit treatment functions
//
//             //- Return number of new internal sub-faces and new proc faces
//             virtual void newInternalProcFaces(label&, label&) const;
//
//             //- Return collocated faces
//             virtual refPtr<labelListList> mapCollocatedFaces() const;


        // Access

            //- Return local reference cast into the cyclic patch
            const cyclicACMIPolyPatch& cyclicACMIPatch() const
            {
                return cyclicACMIPolyPatch_;
            }

            //- Return neighbour
            virtual label neighbPatchID() const
            {
                return cyclicACMIPolyPatch_.neighbPatchID();
            }

            virtual bool owner() const
            {
                return cyclicACMIPolyPatch_.owner();
            }

            //- Return neighbour fvPatch
            virtual const cyclicACMIFvPatch& neighbPatch() const
            {
                return refCast<const cyclicACMIFvPatch>
                (
                    this->boundaryMesh()[cyclicACMIPolyPatch_.neighbPatchID()]
                );
            }

            //- Return neighbour
            virtual label nonOverlapPatchID() const
            {
                return cyclicACMIPolyPatch_.nonOverlapPatchID();
            }

            //- Return non-overlapping fvPatch
            virtual const fvPatch& nonOverlapPatch() const
            {
                return this->boundaryMesh()[nonOverlapPatchID()];
            }

            //- Return a reference to the AMI interpolator
            virtual const AMIPatchToPatchInterpolation& AMI() const
            {
                return cyclicACMIPolyPatch_.AMI();
            }

            //- Are the cyclic planes parallel
            virtual bool parallel() const
            {
                return cyclicACMIPolyPatch_.parallel();
            }

            //- Return face transformation tensor
            virtual const tensorField& forwardT() const
            {
                return cyclicACMIPolyPatch_.forwardT();
            }

            //- Return neighbour-cell transformation tensor
            virtual const tensorField& reverseT() const
            {
                return cyclicACMIPolyPatch_.reverseT();
            }

            const cyclicACMIFvPatch& neighbFvPatch() const
            {
                return refCast<const cyclicACMIFvPatch>
                (
                    this->boundaryMesh()[cyclicACMIPolyPatch_.neighbPatchID()]
                );
            }

            //- Return true if this patch is coupled.
            //  This is equivalent to coupledPolyPatch::coupled()
            //  if parallel running or both sides present, false otherwise
            virtual bool coupled() const;

            //- Return delta (P to N) vectors across coupled patch
            virtual tmp<vectorField> delta() const;

            //- Interpolate (make sure to have uptodate areas)
            template<class Type>
            tmp<Field<Type>> interpolate
            (
                const Field<Type>& fld
            ) const
            {
                // Make sure areas are up-to-date
                updateAreas();

                return
                    cyclicACMIPolyPatch_.cyclicAMIPolyPatch::interpolate
                    (
                        fld
                    );
            }

            //- Interpolate (make sure to have up-to-date areas)
            template<class Type>
            tmp<Field<Type>> interpolate
            (
                const tmp<Field<Type>>& tfld
            ) const
            {
                return interpolate(tfld());
            }

            // Interpolations (non-blocking). Subject to change

                template<class Type>
                void initInterpolate
                (
                    const Field<Type>& fld,
                    labelRange& sendRequests,
                    PtrList<List<Type>>& sendBuffers,
                    labelRange& recvRequests,
                    PtrList<List<Type>>& recvBuffers
                ) const
                {
                    // Make sure areas are up-to-date
                    updateAreas();

                    cyclicACMIPolyPatch_.initInterpolate
                    (
                        fld,
                        sendRequests,
                        sendBuffers,
                        recvRequests,
                        recvBuffers
                    );
                }

                template<class Type>
                tmp<Field<Type>> interpolate
                (
                    const Field<Type>& localFld,
                    const labelRange& requests,  // The receive requests
                    const PtrList<List<Type>>& recvBuffers
                ) const
                {
                    return cyclicACMIPolyPatch_.interpolate
                    (
                        localFld,
                        requests,
                        recvBuffers,
                        UList<Type>()
                    );
                }


        // Interface transfer functions

            //- Return the values of the given internal data adjacent to
            //- the interface as a field
            virtual tmp<labelField> interfaceInternalField
            (
                const labelUList& internalData
            ) const;

            //- Return the values of the given internal data adjacent to
            //- the interface as a field using a mapping faceCell
            virtual tmp<labelField> interfaceInternalField
            (
                const labelUList& internalData,
                const labelUList& faceCells
            ) const;

            //- Return neighbour field
            virtual tmp<labelField> internalFieldTransfer
            (
                const Pstream::commsTypes commsType,
                const labelUList& internalData
            ) const;

};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //