/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | 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 "definitePhases.H"
#include "resolvedInterfaceSystem.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace blendingMethods
{
    defineTypeName(definitePhases);

    addToRunTimeSelectionTable
    (
        blendingMethod,
        definitePhases,
        dictionary
    );
}
}


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

Foam::tmp<Foam::volScalarField>
Foam::blendingMethods::definitePhases::fContinuous
(
    const UPtrList<const volScalarField>& alphas,
    const label phaseSet,
    const label systemSet
) const
{
    return
        alpha(alphas, phaseSet, false)
       /max(interface_.fluid().resolvedInterface().sumAlphaContinuous(), small);
}


Foam::tmp<Foam::volScalarField> Foam::blendingMethods::definitePhases::f
(
    const UPtrList<const volScalarField>& alphas,
    const label phaseSet,
    const label systemSet
) const
{
    label canBeContinuousPhaseSet = 0b00;
    label canBeContinuousSystemSet = 0b00;
    forAllConstIter(phaseInterface, interface_, iter)
    {
        if (canBeContinuous(iter.index()))
        {
            canBeContinuousPhaseSet += 0b01 << iter.index() & phaseSet;
            canBeContinuousSystemSet += 0b01 << iter.index() & systemSet;
        }
    }

    if (canBeContinuousPhaseSet == 0)
    {
        return constant(alphas, 0);
    }

    if (canBeContinuousPhaseSet == canBeContinuousSystemSet)
    {
        return
            fContinuous
            (
                alphas,
                canBeContinuousPhaseSet,
                canBeContinuousSystemSet
            );
    }

    return constant(alphas, 1);
}


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

Foam::blendingMethods::definitePhases::definitePhases
(
    const dictionary& dict,
    const phaseInterface& interface
)
:
    blendingMethod(dict, interface)
{}


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

Foam::blendingMethods::definitePhases::~definitePhases()
{}


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

bool
Foam::blendingMethods::definitePhases::canBeContinuous(const label index) const
{
    if (index == 0)
    {
        return interface_.phase1().continuous();
    }
    else
    {
        return interface_.phase2().continuous();
    }
}


bool Foam::blendingMethods::definitePhases::canSegregate() const
{
    return interface_.phase1().continuous() && interface_.phase2().continuous();
}


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