/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     3.2
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
    This file is part of foam-extend.

    foam-extend 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.

    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.

Application
    elasticOrthoAcpSolidFoam

Description
    Arbitrary crack propagation (ACP) solver
    allowing orthotropic material properties.

    Please cite:
    Cardiff P, Karac A & Ivankovic A, A Large Strain Finite Volume Method for
    Orthotropic Bodies with General Material Orientations, Computer Methods
    in Applied Mechanics & Engineering, Sep 2013,
    http://dx.doi.org/10.1016/j.cma.2013.09.008.

    Carolan D, Tuković Z, Murphy N, Ivankovic A, Arbitrary crack propagation
    in multi-phase materials using the finite volume method, Computational
    Materials Science, 2013, http://dx.doi.org/10.1016/j.commatsci.2012.11.049.

Author
    Philip Cardiff UCD
    ACP by Tukovic FSB and Carolan UCD

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "constitutiveModel.H"
//#include "componentReferenceList.H"
#include "crackerFvMesh.H"
#include "processorPolyPatch.H"
#include "SortableList.H"
#include "solidInterface.H"
#include "solidCohesiveFvPatchVectorField.H"
#include "solidCohesiveFixedModeMixFvPatchVectorField.H"

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

int main(int argc, char *argv[])
{
# include "setRootCase.H"
# include "createTime.H"
# include "createCrackerMesh.H"
# include "createFields.H"
# include "createCrack.H"
  //# include "createReference.H"
# include "createHistory.H"
# include "readDivSigmaExpMethod.H"
# include "createSolidInterfaceNoModify.H"

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

  Info<< "\nStarting time loop\n" << endl;

  lduMatrix::debug = 0;

  scalar maxEffTractionFraction = 0;

  // time rates for predictor
  volTensorField gradV = fvc::ddt(gradU);
  surfaceVectorField snGradV =
    (snGradU - snGradU.oldTime())/runTime.deltaT();

  //# include "initialiseSolution.H"

  while (runTime.run())
    {
#     include "readSolidMechanicsControls.H"
#     include "setDeltaT.H"

      runTime++;

      Info<< "\nTime: " << runTime.timeName() << " s\n" << endl;

      volScalarField rho = rheology.rho();
      volDiagTensorField K = rheology.K();
      surfaceDiagTensorField Kf = fvc::interpolate(K, "K");
      volSymmTensor4thOrderField C = rheology.C();
      surfaceSymmTensor4thOrderField Cf = fvc::interpolate(C, "C");

      solidInterfacePtr->modifyProperties(Cf, Kf);

      //#     include "waveCourantNo.H"

      int iCorr = 0;
      lduMatrix::solverPerformance solverPerf;
      scalar initialResidual = 0;
      scalar relativeResidual = 1;
      //scalar forceResidual = 1;
      label nFacesToBreak = 0;
      label nCoupledFacesToBreak = 0;
      bool topoChange = false;

      //bool noMoreCracks = false;

      // Predictor step using time rates
      if (predictor)
      {
          Info << "Predicting U, gradU and snGradU using velocity"
               << endl;
          U += V*runTime.deltaT();
          gradU += gradV*runTime.deltaT();
          snGradU += snGradV*runTime.deltaT();
      }

      do
      {
          surfaceVectorField n = mesh.Sf()/mesh.magSf();
          do
          {
              U.storePrevIter();

#             include "calculateDivSigmaExp.H"

              fvVectorMatrix UEqn
                  (
                      rho*fvm::d2dt2(U)
                      ==
                      fvm::laplacian(Kf, U, "laplacian(K,U)")
                      + divSigmaExp
                      );

              //#             include "setReference.H"

              if(solidInterfacePtr)
              {
                  solidInterfacePtr->correct(UEqn);
              }

              if (relaxEqn)
              {
                  UEqn.relax();
              }

              solverPerf = UEqn.solve();

              if (aitkenRelax)
              {
#                 include "aitkenRelaxation.H"
              }
              else
              {
                  U.relax();
              }

              if (iCorr == 0)
              {
                  initialResidual = solverPerf.initialResidual();
                  aitkenInitialRes = gMax(mag(U.internalField()));
              }

              //gradU = solidInterfacePtr->grad(U);
              // use leastSquaresSolidInterface grad scheme
              gradU = fvc::grad(U);


#             include "calculateRelativeResidual.H"

              if (iCorr % infoFrequency == 0)
              {
                  Info << "\tTime " << runTime.value()
                       << ", Corr " << iCorr
                       << ", Solving for " << U.name()
                       << " using " << solverPerf.solverName()
                       << ", res = " << solverPerf.initialResidual()
                       << ", rel res = " << relativeResidual;
                  if (aitkenRelax)
                  {
                      Info << ", aitken = " << aitkenTheta;
                  }
                  Info << ", inner iters " << solverPerf.nIterations() << endl;
              }
          }
          while
              (
                  //iCorr++ == 0
                  iCorr++ < 10
                  ||
                  (
                      //solverPerf.initialResidual() > convergenceTolerance
                      relativeResidual > convergenceTolerance
                      &&
                      iCorr < nCorr
                      )
                  );

          Info<< "Solving for " << U.name() << " using "
              << solverPerf.solverName()
              << ", Initial residual = " << initialResidual
              << ", Final residual = " << solverPerf.initialResidual()
              << ", No outer iterations " << iCorr
              << ", Relative residual " << relativeResidual << endl;

#         include "calculateTraction.H"
#         include "updateCrack.H"

          Info << "Max effective traction fraction: "
               << maxEffTractionFraction << endl;

          // reset counter if faces want to crack
          if ((nFacesToBreak > 0)  || (nCoupledFacesToBreak > 0)) iCorr = 0;
      }
      while( (nFacesToBreak > 0)  || (nCoupledFacesToBreak > 0));

      if (cohesivePatchUPtr)
      {
          if (returnReduce(cohesivePatchUPtr->size(), sumOp<label>()))
          {
              cohesivePatchUPtr->cracking();
          }
      }
      else
      {
          if
              (
                  returnReduce
                  (
                      cohesivePatchUFixedModePtr->size(),
                      sumOp<label>())
                  )
          {
              Pout << "Number of faces in crack: "
                   << cohesivePatchUFixedModePtr->size() << endl;
              cohesivePatchUFixedModePtr->relativeSeparationDistance();
          }
      }

      // update time rates for predictor
      if (predictor)
      {
          V = fvc::ddt(U);
          gradV = fvc::ddt(gradU);
          snGradV = (snGradU - snGradU.oldTime())/runTime.deltaT();
      }

#     include "calculateEpsilonSigma.H"
#     include "writeFields.H"
#     include "writeHistory.H"

      Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
          << "  ClockTime = " << runTime.elapsedClockTime() << " s\n\n"
          << endl;
    }

  Info<< "End\n" << endl;

  return(0);
}


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