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//
// Author: Jonathan Madsen (May 28th 2020)
//
// class description:
//   This is a class creates a G4RunManager instance. Once can specify an
//   enumerated value to set the default. If "G4RunManagerType::Default"
//   is used,
//

#ifndef G4RunManagerFactory_hh
#define G4RunManagerFactory_hh 1

#include "G4Types.hh"
#include "G4RunManager.hh"
#include "G4MTRunManager.hh"
#include "G4TaskRunManager.hh"
#include "G4VUserTaskQueue.hh"

#include <set>
#include <map>
#include <string>
#include <regex>

//============================================================================//

enum class G4RunManagerType : G4int
{
  Serial      = 0,
  SerialOnly  = 1,
  MT          = 2,
  MTOnly      = 3,
  Tasking     = 4,
  TaskingOnly = 5,
  TBB         = 6,
  TBBOnly     = 7,
  Default
};

//============================================================================//

class G4RunManagerFactory
{
 public:
  static G4RunManager* CreateRunManager(
    G4RunManagerType _type   = G4RunManagerType::Default,
    G4VUserTaskQueue* _queue = nullptr, G4bool fail_if_unavail = true,
    G4int nthreads = 0);

  // provide a version which specifies to fail if unavailable
  static G4RunManager* CreateRunManager(G4RunManagerType _type,
                                        G4bool fail_if_unavail,
                                        G4int nthreads           = 0,
                                        G4VUserTaskQueue* _queue = nullptr)
  {
    return CreateRunManager(_type, _queue, fail_if_unavail, nthreads);
  }

  static G4RunManager* CreateRunManager(G4RunManagerType _type, G4int nthreads,
                                        G4bool fail_if_unavail   = true,
                                        G4VUserTaskQueue* _queue = nullptr)
  {
    return CreateRunManager(_type, _queue, fail_if_unavail, nthreads);
  }

  // provide string versions of above
  template <typename... Args>
  static G4RunManager* CreateRunManager(std::string type, Args&&... args)
  {
    return CreateRunManager(GetType(type), std::forward<Args>(args)...);
  }

  static std::string GetDefault();
  static std::string GetName(G4RunManagerType);
  static G4RunManagerType GetType(const std::string&);
  static std::set<std::string> GetOptions();
  static G4RunManager* GetMasterRunManager();
  static G4MTRunManager* GetMTMasterRunManager();
  static G4RunManagerKernel* GetMasterRunManagerKernel();
};

#endif  // G4TaskRunManagerCreator_h