/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | Multiphase Code Repository by HZDR
  ======   //   ||  || ===//   | Website: https://doi.org/10.14278/rodare.767
  ||  ||  //    ||  // || \\   | License: GPL-3.0-or-later
  ==  == ====== ====   ==  ==  |
-------------------------------------------------------------------------------
License
    This file is part of the Multiphase Code Repository by HZDR.

    Copyright (C) 2025 by Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR),
    Website: https://hzdr.de

    Multiphase Code Repository by HZDR is based on the free software for
    computational fluid dynamics (CFD) from the OpenFOAM Foundation.
    Copyright (C) 2025 by OpenFOAM Foundation, Website: https://openfoam.org

    If you are interested in which files are original OpenFOAM Foundation
    files, which OpenFOAM Foundation files were modified, and which files were
    newly created, see FILES.md.

    Multiphase Code Repository by HZDR is free software: you can redistribute
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\*---------------------------------------------------------------------------*/

#include "maxDeltaxyz.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace SGSModels
{
    defineTypeNameAndDebug(maxDeltaxyz, 0);
    addToRunTimeSelectionTable(SGSdelta, maxDeltaxyz, dictionary);
}
}


// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::SGSModels::maxDeltaxyz::calcDelta()
{
    label nD = mesh_.nGeometricD();

    const cellList& cells = mesh_.cells();
    scalarField hmax(cells.size());

    forAll(cells,celli)
    {
        scalar deltaMaxTmp = 0.0;
        const labelList& cFaces = mesh_.cells()[celli];
        const point& centrevector = mesh_.cellCentres()[celli];

        forAll(cFaces, cFacei)
        {
            label facei = cFaces[cFacei];
            const point& facevector = mesh_.faceCentres()[facei];
            scalar tmp = mag(facevector - centrevector);
            if (tmp > deltaMaxTmp)
            {
                deltaMaxTmp = tmp;
            }
        }

        hmax[celli] = deltaCoeff_*deltaMaxTmp;
    }

    if (nD == 3)
    {
        delta_.primitiveFieldRef() = hmax;
    }
    else if (nD == 2)
    {
        delta_.primitiveFieldRef() = hmax;
    }
    else
    {
        FatalErrorInFunction
            << "Case is not 3D or 2D, this 'delta' method is not applicable"
            << exit(FatalError);
    }
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::SGSModels::maxDeltaxyz::maxDeltaxyz
(
    const word& name,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    SGSdelta(name, mesh),
    deltaCoeff_
    (
        dict.optionalSubDict(type() + "Coeffs").lookupOrDefault<scalar>
        (
            "deltaCoeff",
            dimless,
            1
        )
    )
{
    calcDelta();
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

void Foam::SGSModels::maxDeltaxyz::read(const dictionary& dict)
{
    const dictionary& coeffsDict(dict.optionalSubDict(type() + "Coeffs"));

    coeffsDict.readIfPresent<scalar>("deltaCoeff", deltaCoeff_);

    calcDelta();
}


void Foam::SGSModels::maxDeltaxyz::correct()
{
    if (mesh_.changing())
    {
        calcDelta();
    }
}


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