/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2018 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 "odeFiniteRate.H"

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

template<class ChemistryModel>
Foam::odeFiniteRate<ChemistryModel>::odeFiniteRate(typename ChemistryModel::reactionThermo& thermo)
  :
FiniteRateChemistrySolver<ChemistryModel>(thermo),
coeffsDict_(this->subDict("odeCoeffs")),
odeSolver_(ODESolver::New(*this, coeffsDict_)),
cTp_(this->nEqns())
{}


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

template<class ChemistryModel>
Foam::odeFiniteRate<ChemistryModel>::~odeFiniteRate()
{}


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

template<class ChemistryModel>
void Foam::odeFiniteRate<ChemistryModel>::solve
(
    scalarField& c,
    scalar& T,
    scalar& p,
    scalar& deltaT,
    scalar& subDeltaT
) const
{
  // Reset the size of the ODE system to the simplified size when mechanism
  // reduction is active
  if (odeSolver_->resize()) {
    odeSolver_->resizeField(cTp_);
  }

  const label nSpecie = this->nSpecie();

  // Copy the concentration, T and P to the total solve-vector
  for (int i=0; i<nSpecie; i++) {
    cTp_[i] = c[i];
  }
  cTp_[nSpecie] = T;
  cTp_[nSpecie+1] = p;

  odeSolver_->solve(0, deltaT, cTp_, subDeltaT);

  for (int i=0; i<nSpecie; i++) {
    c[i] = max(0.0, cTp_[i]);
  }
  T = cTp_[nSpecie];
  p = cTp_[nSpecie+1];
}

// Place holder for PATO (do not use)
template<class ChemistryModel>
void Foam::odeFiniteRate<ChemistryModel>::solveFixedT
(
    scalarField& c,
    scalar& T,
    scalar& p,
    scalar& deltaT,
    scalar& subDeltaT
) const
{
  // Reset the size of the ODE system to the simplified size when mechanism
  // reduction is active
  if (odeSolver_->resize()) {
    odeSolver_->resizeField(cTp_);
  }

  const label nSpecie = this->nSpecie();

  // Copy the concentration, T and P to the total solve-vector
  for (int i=0; i<nSpecie; i++) {
    cTp_[i] = c[i];
  }
  cTp_[nSpecie] = T;
  cTp_[nSpecie+1] = p;

  odeSolver_->solve(0, deltaT, cTp_, subDeltaT);

  for (int i=0; i<nSpecie; i++) {
    c[i] = max(0.0, cTp_[i]);
  }
  T = cTp_[nSpecie];
  p = cTp_[nSpecie+1];
}

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