/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | 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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    published by the Free Software Foundation, either version 3 of the
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\*---------------------------------------------------------------------------*/

#include "filmThickness.H"
#include "addonFvcSpread.H"
#include "addToRunTimeSelectionTable.H"
#include "surfaceFields.H"
#include "fvMesh.H"
#include "IOobject.H"
#include "Time.H"

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

namespace Foam
{
namespace functionObjects
{
    defineTypeNameAndDebug(filmThickness, 0);
    addToRunTimeSelectionTable(functionObject, filmThickness, dictionary);
}
}


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

bool Foam::functionObjects::filmThickness::calc()
{
    if (foundObject<volScalarField>(fieldName_))
    {
        const volScalarField& alpha = lookupObject<volScalarField>(fieldName_);

        store
        (
            volScalarField::New
            (
                resultName_,
                fvc::integrateWallNormal
                (
                    alpha,
                    alpha,
                    nLayers_,
                    patchName_,
                    yDiff_
                )
            )
        );

        return true;
    }
    else
    {
        cannotFindObject<volScalarField>(fieldName_);

        return false;
    }
}


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

Foam::functionObjects::filmThickness::filmThickness
(
    const word& name,
    const Foam::Time& runTime,
    const Foam::dictionary& dict
)
:
    fieldExpression(name, runTime, dict, typeName, "alpha"),
    patchName_(dict.lookup<word>("patch")),
    nLayers_(dict.lookupOrDefault<scalar>("nLayers", 10)),
    yDiff_(dict.lookupOrDefault<scalar>("yDiff", -1))
{
    read(dict);
}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::functionObjects::filmThickness::~filmThickness()
{}
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

bool Foam::functionObjects::filmThickness::read
(
    const Foam::dictionary& dict
)
{
    fieldExpression::read(dict);
    dict.readIfPresent("patch", patchName_);
    dict.readIfPresent("nLayers", nLayers_);
    dict.readIfPresent("yDiff", yDiff_);

    return true;
}


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