/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2015 OpenFOAM Foundation
    Copyright (C) 2020-2021,2024 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/>.

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

inline Foam::mappedPatchBase::sampleMode
Foam::mappedPatchBase::mode() const noexcept
{
    return mode_;
}


inline const Foam::word& Foam::mappedPatchBase::sampleWorld() const noexcept
{
    return sampleWorld_;
}


inline const Foam::word& Foam::mappedPatchBase::sampleRegion() const
{
    if (sampleRegion_.empty())
    {
        if (!coupleGroup_.good())
        {
            FatalErrorInFunction
                << "Supply either a regionName or a coupleGroup"
                << " for patch " << patch_.name()
                << " in region " << patch_.boundaryMesh().mesh().name()
                << exit(FatalError);
        }

        // Try and use patchGroup to find samplePatch and sampleRegion
        label samplePatchID = coupleGroup_.findOtherPatchID
        (
            patch_,
            sampleRegion_
        );

        samplePatch_ = sampleMesh().boundaryMesh()[samplePatchID].name();
    }
    return sampleRegion_;
}


inline const Foam::word& Foam::mappedPatchBase::samplePatch() const
{
    if (samplePatch_.empty())
    {
        if (!coupleGroup_.good())
        {
            FatalErrorInFunction
                << "Supply either a patchName or a coupleGroup"
                << " for patch " << patch_.name()
                << " in region " << patch_.boundaryMesh().mesh().name() << nl
                << exit(FatalError);
        }

        // Try and use patchGroup to find samplePatch and sampleRegion
        label samplePatchID = coupleGroup_.findOtherPatchID
        (
            patch_,
            sampleRegion_
        );

        samplePatch_ = sampleMesh().boundaryMesh()[samplePatchID].name();
    }
    return samplePatch_;
}


inline const Foam::word& Foam::mappedPatchBase::coupleGroup() const
{
    return coupleGroup_.name();
}


inline Foam::label Foam::mappedPatchBase::sampleSize() const
{
    switch (mode_)
    {
        case NEARESTPATCHFACEAMI:
        {
            return samplePolyPatch().size();
        }
        case NEARESTCELL:
        {
            return sampleMesh().nCells();
        }
        case NEARESTPATCHFACE:
        {
            return samplePolyPatch().size();
        }
        case NEARESTPATCHPOINT:
        {
            return samplePolyPatch().nPoints();
        }
        case NEARESTFACE:
        {
            const polyMesh& mesh = sampleMesh();
            return mesh.nBoundaryFaces();
        }
        default:
        {
            FatalErrorInFunction
                << "problem." << abort(FatalError);
            return -1;
        }
    }
}


inline const Foam::vector& Foam::mappedPatchBase::offset() const noexcept
{
    return offset_;
}


inline const Foam::vectorField& Foam::mappedPatchBase::offsets() const noexcept
{
    return offsets_;
}


inline Foam::label Foam::mappedPatchBase::getCommunicator() const
{
    // Cached communicator, or a get a new one
    if (communicator_ == -1)
    {
        const_cast<label&>(communicator_) = getWorldCommunicator();
    }
    return communicator_;
}


inline Foam::label Foam::mappedPatchBase::comm() const
{
    // Cached communicator, or a get a new one
    if (communicator_ == -1)
    {
        const_cast<label&>(communicator_) = getWorldCommunicator();
    }
    return communicator_;
}


inline bool Foam::mappedPatchBase::sameWorld() const
{
    return
    (
        UPstream::allWorlds().size() == 1
     || sampleWorld_.empty()
     || UPstream::myWorld() == sampleWorld_
    );
}


inline bool Foam::mappedPatchBase::masterWorld() const
{
    if (sameWorld())
    {
        return true;
    }

    // Use ordering in allWorlds
    const label otherWorldId = UPstream::allWorlds().find(sampleWorld_);
    return (otherWorldId < 0 || (UPstream::myWorldID() < otherWorldId));
}


inline bool Foam::mappedPatchBase::sameRegion() const noexcept
{
    return sameRegion_;
}


inline Foam::uniformDimensionedScalarField&
Foam::mappedPatchBase::updateSampleMeshTime() const
{
    if (!updateSampleMeshTimePtr_)
    {
        // Note: explicitly register on our mesh instead of sampleMesh
        // since otherwise the destructor might give problems since sampleMesh
        // might have already been taken down before.
        const auto& mesh = patch_.boundaryMesh().mesh();

        updateSampleMeshTimePtr_.reset
        (
            new uniformDimensionedScalarField
            (
                IOobject
                (
                    "updateSampleMeshTime",
                    mesh.pointsInstance(),
                    mesh.thisDb(),
                    IOobject::NO_READ,
                    IOobject::NO_WRITE,
                    IOobject::NO_REGISTER
                )
            )
        );
    }

    return updateSampleMeshTimePtr_();
}


inline Foam::uniformDimensionedScalarField&
Foam::mappedPatchBase::updateMeshTime() const
{
    if (!updateMeshTimePtr_)
    {
        const auto& mesh = patch_.boundaryMesh().mesh();

        updateMeshTimePtr_.reset
        (
            new uniformDimensionedScalarField
            (
                IOobject
                (
                    "updateMeshTime",
                    mesh.pointsInstance(),
                    mesh.thisDb(),
                    IOobject::NO_READ,
                    IOobject::NO_WRITE,
                    IOobject::NO_REGISTER
                )
            )
        );
    }

    return updateMeshTimePtr_();
}


inline bool Foam::mappedPatchBase::upToDate() const
{
    const polyMesh& thisMesh = patch_.boundaryMesh().mesh();

    if (sameWorld())
    {
        return
            sampleMesh().upToDatePoints(updateSampleMeshTime())
         && thisMesh.upToDatePoints(updateMeshTime());
    }
    else
    {
        // If not the same world we do not know what the other side is doing
        // so only check our local side
        return thisMesh.upToDatePoints(updateMeshTime());
    }
}


inline const Foam::mapDistribute& Foam::mappedPatchBase::map() const
{
    if (!upToDate())
    {
        mapPtr_.reset(nullptr);

        if (AMIPtr_)
        {
            AMIPtr_->upToDate(false);
        }
    }

    if (!mapPtr_)
    {
        calcMapping();
    }

    return *mapPtr_;
}


inline const Foam::AMIPatchToPatchInterpolation& Foam::mappedPatchBase::AMI
(
    bool forceUpdate
) const
{
    if (!upToDate())
    {
        mapPtr_.reset(nullptr);
        AMIPtr_->upToDate(false);
    }

    if (forceUpdate)
    {
        AMIPtr_->upToDate(false);
    }

    calcAMI();

    return *AMIPtr_;
}


inline bool Foam::mappedPatchBase::owner() const
{
    return (patch_.boundaryMesh().mesh().name() < sampleRegion());
}


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