/**
 * @file   mg.hpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Apr 18 13:01:13 2011
 *
 * @brief  Header file for the VMG main class.
 *
 */

#ifndef MG_HPP_
#define MG_HPP_

#include <map>

#include "base/command_factory.hpp"
#include "base/factory.hpp"

namespace VMG
{

class Comm;
class Discretization;
class Grid;
class Interface;
class LevelOperator;
class Multigrid;
class Smoother;
class Solver;
class Stencil;
class TempGrid;

class MG
{
public:
  static MG* Instance()
  {
    static MG mgs;
    return &mgs;
  }

  static void SetInterface(Interface* interface, Comm* comm);

  static VMG::Comm* GetComm();
  static VMG::Discretization* GetDiscretization();
  static VMG::Interface* GetInterface();
  static VMG::LevelOperator* GetLevelOperator();
  static VMG::Multigrid* GetRhs();
  static VMG::Multigrid* GetSol();
  static VMG::Grid& GetRhsMaxLevel();
  static VMG::Grid& GetSolMaxLevel();
  static VMG::Smoother* GetSmoother();
  static VMG::Solver* GetSolver();
  static VMG::TempGrid* GetTempGrid();

  static VMG::Factory& GetFactory();
  static VMG::CommandFactory& GetCommands();

  static void PostInit();
  static void Solve();
  static void Destroy();
  static bool IsInitialized();

  static void SetState(const int& key);

private:
  MG();
  virtual ~MG();

  void RegisterLibraryCommands();

  vmg_float ComputeVectorNorm(const Multigrid& vec);

  static VMG::CommandFactory command_factory;
  std::map<int, VMG::Factory> factories;
  int state;
};

}

#endif