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// The Root analysis manager extension for MPI
// This class is temporarily provided with g4mpi,
// it will be integrated in Geant4 analysis category in future.
//
// Author: Ivana Hrivnacova, 21/11/2018 (ivana@ipno.in2p3.fr)

#ifndef G4RootMpiNtupleFileManager_h
#define G4RootMpiNtupleFileManager_h 1

#include "G4RootNtupleFileManager.hh"

class G4RootMpiNtupleManager;
class G4RootMpiPNtupleManager;

namespace tools {
class impi;  
}  

class G4RootMpiNtupleFileManager : public  G4RootNtupleFileManager
{
  public:
    explicit G4RootMpiNtupleFileManager(const G4AnalysisManagerState& state);
    virtual ~G4RootMpiNtupleFileManager();
    
    // MPI
    void SetMpiNtupleMerging(tools::impi* impi, 
                             G4int mpiRank, G4int mpiSize,
                             G4int nofReducedNtupleFiles = 0);

    // virtual methods from base class
    virtual G4bool ActionAtOpenFile(const G4String& fileName) final;
    virtual G4bool ActionAtWrite() final;
    virtual G4bool ActionAtCloseFile(G4bool reset) final; 
    virtual G4bool Reset() final;

    virtual std::shared_ptr<G4VNtupleManager> CreateNtupleManager() override;

    std::shared_ptr<G4RootMpiNtupleManager> GetMpiNtupleManager() const;

  private:
    // methods
    void SetMpiNtupleMergingMode(G4int nofNtupleFiles);
    void CreateMpiNtupleManagers(tools::impi* impi, G4int mpiRank, G4int mpiSize);

    // data members 
    tools::impi* fImpi;
    G4int fMpiRank;
    G4int fMpiSize;
    // std::shared_ptr<G4RootMpiNtupleManager>  fMpiNtupleManager; 
    std::shared_ptr<G4RootMpiPNtupleManager>  fMpiSlaveNtupleManager;
    G4bool fNtupleBooked;
};

#endif