/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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 "partialSlipFvPatchField.H"
#include "symmTransformField.H"

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

template<class Type>
Foam::partialSlipFvPatchField<Type>::partialSlipFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, fvMesh>& iF
)
:
    transformFvPatchField<Type>(p, iF),
    valueFraction_(p.size(), 1.0)
{}


template<class Type>
Foam::partialSlipFvPatchField<Type>::partialSlipFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, fvMesh>& iF,
    const dictionary& dict
)
:
    transformFvPatchField<Type>(p, iF),
    valueFraction_("valueFraction", units::fraction, dict, p.size())
{
    evaluate();
}


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


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


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

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

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

    mapper(valueFraction_, dmptf.valueFraction_);
}


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

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

    valueFraction_.reset(dmptf.valueFraction_);
}


template<class Type>
Foam::tmp<Foam::Field<Type>>
Foam::partialSlipFvPatchField<Type>::snGrad() const
{
    tmp<vectorField> nHat = patch().nf();
    const Field<Type> pif(patchInternalField());

    return
    (
        (1.0 - valueFraction_)*transform(I - sqr(nHat), pif) - pif
    )*patch().deltaCoeffs();
}


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

    tmp<vectorField> nHat = patch().nf();

    Field<Type>::operator=
    (
        (1.0 - valueFraction_)
       *transform(I - sqr(nHat), patchInternalField())
    );

    transformFvPatchField<Type>::evaluate();
}


template<class Type>
Foam::tmp<Foam::Field<Type>>
Foam::partialSlipFvPatchField<Type>::snGradTransformDiag() const
{
    const vectorField nHat(patch().nf());
    vectorField diag(nHat.size());

    diag.replace(vector::X, mag(nHat.component(vector::X)));
    diag.replace(vector::Y, mag(nHat.component(vector::Y)));
    diag.replace(vector::Z, mag(nHat.component(vector::Z)));

    return
        valueFraction_*pTraits<Type>::one
      + (1.0 - valueFraction_)
       *transformMask
        (
            pTraits<Type>::zero,
            pow<pTraits<Type>::rank>(diag)
        );
}


template<class Type>
void Foam::partialSlipFvPatchField<Type>::write(Ostream& os) const
{
    transformFvPatchField<Type>::write(os);
    writeEntry(os, "valueFraction", valueFraction_);
}


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