/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2017 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 "dynamicInkJetFvMesh.H"
#include "addToRunTimeSelectionTable.H"
#include "volFields.H"
#include "mathematicalConstants.H"

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

namespace Foam
{
    defineTypeNameAndDebug(dynamicInkJetFvMesh, 0);
    addToRunTimeSelectionTable(dynamicFvMesh, dynamicInkJetFvMesh, IOobject);
}


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

Foam::dynamicInkJetFvMesh::dynamicInkJetFvMesh(const IOobject& io)
:
    dynamicFvMesh(io),
    dynamicMeshCoeffs_
    (
        IOdictionary
        (
            IOobject
            (
                "dynamicMeshDict",
                io.time().constant(),
                *this,
                IOobject::MUST_READ_IF_MODIFIED,
                IOobject::NO_WRITE,
                false
            )
        ).optionalSubDict(typeName + "Coeffs")
    ),
    amplitude_(readScalar(dynamicMeshCoeffs_.lookup("amplitude"))),
    frequency_(readScalar(dynamicMeshCoeffs_.lookup("frequency"))),
    refPlaneX_(readScalar(dynamicMeshCoeffs_.lookup("refPlaneX"))),
    stationaryPoints_
    (
        IOobject
        (
            "points",
            io.time().constant(),
            meshSubDir,
            *this,
            IOobject::MUST_READ,
            IOobject::NO_WRITE
        )
    )
{
    Info<< "Performing a dynamic mesh calculation: " << endl
        << "amplitude: " << amplitude_
        << " frequency: " << frequency_
        << " refPlaneX: " << refPlaneX_ << endl;
}

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

Foam::dynamicInkJetFvMesh::~dynamicInkJetFvMesh()
{}


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

bool Foam::dynamicInkJetFvMesh::update()
{
    scalar scalingFunction =
        0.5*
        (
            ::cos(constant::mathematical::twoPi*frequency_*time().value())
          - 1.0
        );

    Info<< "Mesh scaling. Time = " << time().value() << " scaling: "
        << scalingFunction << endl;

    pointField newPoints = stationaryPoints_;

    newPoints.replace
    (
        vector::X,
        stationaryPoints_.component(vector::X)*
        (
            1.0
          + pos0
            (
              - (stationaryPoints_.component(vector::X))
              - refPlaneX_
            )*amplitude_*scalingFunction
        )
    );

    fvMesh::movePoints(newPoints);

    volVectorField& U =
        const_cast<volVectorField&>(lookupObject<volVectorField>("U"));
    U.correctBoundaryConditions();

    return true;
}


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