/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2026 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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/>.

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

#include "directionMixedFvPatchField.H"
#include "symmTransformField.H"

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

template<class Type>
Foam::directionMixedFvPatchField<Type>::directionMixedFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, fvMesh>& iF
)
:
    transformFvPatchField<Type>(p, iF),
    refValue_(p.size()),
    refGrad_(p.size()),
    valueFraction_(p.size())
{}


template<class Type>
Foam::directionMixedFvPatchField<Type>::directionMixedFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, fvMesh>& iF,
    const dictionary& dict
)
:
    transformFvPatchField<Type>(p, iF, dict),
    refValue_("refValue", iF.dimensions(), dict, p.size()),
    refGrad_("refGradient", iF.dimensions()/dimensions::length, dict, p.size()),
    valueFraction_("valueFraction", units::fraction, dict, p.size())
{
    evaluate();
}


template<class Type>
Foam::directionMixedFvPatchField<Type>::directionMixedFvPatchField
(
    const directionMixedFvPatchField<Type>& ptf,
    const fvPatch& p,
    const DimensionedField<Type, fvMesh>& iF,
    const fieldMapper& mapper
)
:
    transformFvPatchField<Type>(ptf, p, iF, mapper),
    refValue_(mapper(ptf.refValue_)),
    refGrad_(mapper(ptf.refGrad_)),
    valueFraction_(mapper(ptf.valueFraction_))
{}


template<class Type>
Foam::directionMixedFvPatchField<Type>::directionMixedFvPatchField
(
    const directionMixedFvPatchField<Type>& ptf,
    const DimensionedField<Type, fvMesh>& iF
)
:
    transformFvPatchField<Type>(ptf, iF),
    refValue_(ptf.refValue_),
    refGrad_(ptf.refGrad_),
    valueFraction_(ptf.valueFraction_)
{}


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

template<class Type>
void Foam::directionMixedFvPatchField<Type>::map
(
    const fvPatchField<Type>& ptf,
    const fieldMapper& mapper
)
{
    transformFvPatchField<Type>::map(ptf, mapper);

    const directionMixedFvPatchField<Type>& dmptf =
        refCast<const directionMixedFvPatchField<Type>>(ptf);

    mapper(refValue_, dmptf.refValue_);
    mapper(refGrad_, dmptf.refGrad_);
    mapper(valueFraction_, dmptf.valueFraction_);
}


template<class Type>
void Foam::directionMixedFvPatchField<Type>::reset
(
    const fvPatchField<Type>& ptf
)
{
    transformFvPatchField<Type>::reset(ptf);

    const directionMixedFvPatchField<Type>& dmptf =
        refCast<const directionMixedFvPatchField<Type>>(ptf);

    refValue_.reset(dmptf.refValue_);
    refGrad_.reset(dmptf.refGrad_);
    valueFraction_.reset(dmptf.valueFraction_);
}


template<class Type>
Foam::tmp<Foam::Field<Type>>
Foam::directionMixedFvPatchField<Type>::snGrad() const
{
    const Field<Type> pif(patchInternalField());

    tmp<Field<Type>> normalValue = transform(valueFraction_, refValue_);

    tmp<Field<Type>> gradValue = pif + refGrad_/patch().deltaCoeffs();

    tmp<Field<Type>> transformGradValue =
        transform(I - valueFraction_, gradValue);

    return
        (normalValue + transformGradValue - pif)*
        patch().deltaCoeffs();
}


template<class Type>
void Foam::directionMixedFvPatchField<Type>::evaluate(const Pstream::commsTypes)
{
    if (!this->updated())
    {
        this->updateCoeffs();
    }

    tmp<Field<Type>> normalValue = transform(valueFraction_, refValue_);

    tmp<Field<Type>> gradValue =
        patchInternalField() + refGrad_/patch().deltaCoeffs();

    tmp<Field<Type>> transformGradValue =
        transform(I - valueFraction_, gradValue);

    Field<Type>::operator=(normalValue + transformGradValue);

    transformFvPatchField<Type>::evaluate();
}


template<class Type>
Foam::tmp<Foam::Field<Type>>
Foam::directionMixedFvPatchField<Type>::snGradTransformDiag() const
{
    vectorField diag(valueFraction_.size());

    diag.replace
    (
        vector::X,
        sqrt(mag(valueFraction_.component(symmTensor::XX)))
    );
    diag.replace
    (
        vector::Y,
        sqrt(mag(valueFraction_.component(symmTensor::YY)))
    );
    diag.replace
    (
        vector::Z,
        sqrt(mag(valueFraction_.component(symmTensor::ZZ)))
    );

    return transformMask
    (
        pTraits<Type>::zero,
        pow<pTraits<Type>::rank>(diag)
    );
}


template<class Type>
void Foam::directionMixedFvPatchField<Type>::write(Ostream& os) const
{
    transformFvPatchField<Type>::write(os);
    writeEntry(os, "refValue", refValue_);
    writeEntry(os, "refGradient", refGrad_);
    writeEntry(os, "valueFraction", valueFraction_);
    writeEntry(os, "value", *this);
}


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