/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 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 "correctedSnGrad.H"
#include "volFields.H"
#include "surfaceFields.H"
#include "linear.H"
#include "fvcGrad.H"
#include "gaussGrad.H"

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

template<class Type>
Foam::fv::correctedSnGrad<Type>::~correctedSnGrad()
{}


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

template<class Type>
Foam::tmp<Foam::GeometricField<Type, Foam::fvsPatchField, Foam::surfaceMesh> >
Foam::fv::correctedSnGrad<Type>::fullGradCorrection
(
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    const fvMesh& mesh = this->mesh();

    // construct GeometricField<Type, fvsPatchField, surfaceMesh>
    tmp<GeometricField<Type, fvsPatchField, surfaceMesh> > tssf =
        mesh.nonOrthCorrectionVectors()
      & linear<typename outerProduct<vector, Type>::type>(mesh).interpolate
        (
            gradScheme<Type>::New
            (
                mesh,
                mesh.gradScheme("grad(" + vf.name() + ')')
            )().grad(vf, "grad(" + vf.name() + ')')
        );
    tssf().rename("snGradCorr(" + vf.name() + ')');

    return tssf;
}


template<class Type>
Foam::tmp<Foam::GeometricField<Type, Foam::fvsPatchField, Foam::surfaceMesh> >
Foam::fv::correctedSnGrad<Type>::correction
(
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    const fvMesh& mesh = this->mesh();

    // construct GeometricField<Type, fvsPatchField, surfaceMesh>
    tmp<GeometricField<Type, fvsPatchField, surfaceMesh> > tssf
    (
        new GeometricField<Type, fvsPatchField, surfaceMesh>
        (
            IOobject
            (
                "snGradCorr("+vf.name()+')',
                vf.instance(),
                mesh,
                IOobject::NO_READ,
                IOobject::NO_WRITE
            ),
            mesh,
            vf.dimensions()*mesh.nonOrthDeltaCoeffs().dimensions()
        )
    );
    GeometricField<Type, fvsPatchField, surfaceMesh>& ssf = tssf();

    for (direction cmpt = 0; cmpt < pTraits<Type>::nComponents; cmpt++)
    {
        ssf.replace
        (
            cmpt,
            mesh.nonOrthCorrectionVectors()
          & linear
            <
                typename
                outerProduct<vector, typename pTraits<Type>::cmptType>::type
            >(mesh).interpolate
            (
                gradScheme<typename pTraits<Type>::cmptType>::New
                (
                    mesh,
                    mesh.gradScheme("grad(" + ssf.name() + ')')
                )()
                //gaussGrad<typename pTraits<Type>::cmptType>(mesh)
               .grad(vf.component(cmpt))
            )
        );
    }

    return tssf;
}


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