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// Author: Ivana Hrivnacova, 20/07/2017 (ivana@ipno.in2p3.fr)

#include "G4Hdf5AnalysisManager.hh"
#include "G4Hdf5FileManager.hh"
#include "G4Hdf5NtupleFileManager.hh"
#include "G4AnalysisManagerState.hh"
#include "G4AnalysisUtilities.hh"
#include "G4ThreadLocalSingleton.hh"
#include "G4Threading.hh"
#include "G4AutoLock.hh"

using namespace G4Analysis;

// mutex in a file scope

namespace {
  //Mutex to lock master manager when opening a file
  G4Mutex openFileMutex = G4MUTEX_INITIALIZER;
  //Mutex to lock master manager when closing a file
  G4Mutex closeFileMutex = G4MUTEX_INITIALIZER;
}

// G4Hdf5AnalysisManager* G4Hdf5AnalysisManager::fgMasterInstance = nullptr;
// G4ThreadLocal G4bool G4Hdf5AnalysisManager::fgIsInstance = false;

//_____________________________________________________________________________
G4Hdf5AnalysisManager* G4Hdf5AnalysisManager::Instance()
{
  static G4ThreadLocalSingleton<G4Hdf5AnalysisManager> instance;
  fgIsInstance = true;
  return instance.Instance();
}

//_____________________________________________________________________________
G4bool G4Hdf5AnalysisManager::IsInstance()
{
  return fgIsInstance;
}

//_____________________________________________________________________________
G4Hdf5AnalysisManager::G4Hdf5AnalysisManager()
 : G4ToolsAnalysisManager("Hdf5")
{
#ifdef G4MULTITHREADED
#ifndef H5_HAVE_THREADSAFE
    G4Exception("G4Hdf5AnalysisManager::G4Hdf5AnalysisManager",
                "Analysis_F001", FatalException,
                "Your HDF5 lib is not built with H5_HAVE_THREADSAFE.");
#endif
#endif

  // File manager
  auto fileManager = std::make_shared<G4Hdf5FileManager>(fState);
  SetFileManager(fileManager);

  // Ntuple file manager
  fNtupleFileManager = std::make_shared<G4Hdf5NtupleFileManager>(fState);
  SetNtupleFileManager(fNtupleFileManager);
  fNtupleFileManager->SetFileManager(fileManager);
  fNtupleFileManager->SetBookingManager(fNtupleBookingManager);
}

//_____________________________________________________________________________
G4Hdf5AnalysisManager::~G4Hdf5AnalysisManager()
{
  fgIsInstance = false;
}

//
// protected methods
//

//_____________________________________________________________________________
G4bool G4Hdf5AnalysisManager::OpenFileImpl(const G4String& fileName)
{
  G4AutoLock lock(&openFileMutex);
  auto result = G4ToolsAnalysisManager::OpenFileImpl(fileName);
  lock.unlock();

  return result;
}

//_____________________________________________________________________________
G4bool G4Hdf5AnalysisManager::CloseFileImpl(G4bool reset)
{
  G4AutoLock lock(&closeFileMutex);
  auto result = G4ToolsAnalysisManager::CloseFileImpl(reset);
  lock.unlock();

  return result;
}