/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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 "oscillatingVelocityPointPatchVectorField.H"
#include "pointPatchFields.H"
#include "addToRunTimeSelectionTable.H"
#include "Time.H"
#include "polyMesh.H"

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

namespace Foam
{

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

oscillatingVelocityPointPatchVectorField::
oscillatingVelocityPointPatchVectorField
(
    const pointPatch& p,
    const DimensionedField<vector, pointMesh>& iF
)
:
    fixedValuePointPatchField<vector>(p, iF),
    amplitude_(vector::zero),
    omega_(0.0),
    p0_(p.localPoints())
{}


oscillatingVelocityPointPatchVectorField::
oscillatingVelocityPointPatchVectorField
(
    const pointPatch& p,
    const DimensionedField<vector, pointMesh>& iF,
    const dictionary& dict
)
:
    fixedValuePointPatchField<vector>(p, iF, dict),
    amplitude_(dict.lookup("amplitude")),
    omega_(readScalar(dict.lookup("omega")))
{
    if (!dict.found("value"))
    {
        updateCoeffs();
    }

    if (dict.found("p0"))
    {
        p0_ = vectorField("p0", dict , p.size());
    }
    else
    {
        p0_ = p.localPoints();
    }
}


oscillatingVelocityPointPatchVectorField::
oscillatingVelocityPointPatchVectorField
(
    const oscillatingVelocityPointPatchVectorField& ptf,
    const pointPatch& p,
    const DimensionedField<vector, pointMesh>& iF,
    const pointPatchFieldMapper& mapper
)
:
    fixedValuePointPatchField<vector>(ptf, p, iF, mapper),
    amplitude_(ptf.amplitude_),
    omega_(ptf.omega_),
    p0_(ptf.p0_, mapper)
{}


oscillatingVelocityPointPatchVectorField::
oscillatingVelocityPointPatchVectorField
(
    const oscillatingVelocityPointPatchVectorField& ptf,
    const DimensionedField<vector, pointMesh>& iF
)
:
    fixedValuePointPatchField<vector>(ptf, iF),
    amplitude_(ptf.amplitude_),
    omega_(ptf.omega_),
    p0_(ptf.p0_)
{}


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

void oscillatingVelocityPointPatchVectorField::autoMap
(
    const pointPatchFieldMapper& m
)
{
    fixedValuePointPatchField<vector>::autoMap(m);

    p0_.autoMap(m);
}


void oscillatingVelocityPointPatchVectorField::rmap
(
    const pointPatchField<vector>& ptf,
    const labelList& addr
)
{
    const oscillatingVelocityPointPatchVectorField& oVptf =
        refCast<const oscillatingVelocityPointPatchVectorField>(ptf);

    fixedValuePointPatchField<vector>::rmap(oVptf, addr);

    p0_.rmap(oVptf.p0_, addr);
}


void oscillatingVelocityPointPatchVectorField::updateCoeffs()
{
    if (this->updated())
    {
        return;
    }

    const polyMesh& mesh = this->dimensionedInternalField().mesh()();
    const Time& t = mesh.time();
    const pointPatch& p = this->patch();

    Field<vector>::operator=
    (
        (p0_ + amplitude_*sin(omega_*t.value()) - p.localPoints())
       /t.deltaTValue()
    );

    fixedValuePointPatchField<vector>::updateCoeffs();
}


void oscillatingVelocityPointPatchVectorField::write(Ostream& os) const
{
    pointPatchField<vector>::write(os);
    os.writeKeyword("amplitude")
        << amplitude_ << token::END_STATEMENT << nl;
    os.writeKeyword("omega")
        << omega_ << token::END_STATEMENT << nl;
    p0_.writeEntry("p0", os);
    writeEntry("value", os);
}


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

makePointPatchTypeField
(
    pointPatchVectorField,
    oscillatingVelocityPointPatchVectorField
);

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

} // End namespace Foam

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