/**
 * @file   com_force_discrete_compatibility.cpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Apr 18 12:37:11 2011
 *
 * @brief  May be used to explicitly force the discrete
 *         compatibility condition \sum_{i,j,k} f_{i,j,k} = 0.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "base/command.hpp"
#include "grid/grid.hpp"
#include "grid/multigrid.hpp"
#include "mg.hpp"

using namespace VMG;

class VMGCommandForceDiscreteCompatibility : public Command
{
public:
  Request Run(Command::argument_vector arguments)
  {
    MPE_EVENT_BEGIN()

    Grid& rhs = (*MG::GetRhs())(MG::GetRhs()->MaxLevel());
    Comm& comm = *MG::GetComm();

    if (comm.BoundaryConditions()[0] == Periodic &&
	comm.BoundaryConditions()[1] == Periodic &&
	comm.BoundaryConditions()[2] == Periodic)
      rhs.ForceDiscreteCompatibilityCondition();

    MPE_EVENT_END()

    return Continue;
  }

  static const char* Name() {return "ForceDiscreteCompatibility";}
  static int Arguments() {return 0;}
};

CREATE_INITIALIZER(VMGCommandForceDiscreteCompatibility)