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// Author: Ivana Hrivnacova, 23/06/2015  (ivana@ipno.in2p3.fr)

#include "G4AnalysisManagerState.hh"
#include "G4HnManager.hh"
#include "G4AnalysisUtilities.hh"
#include "G4AutoLock.hh"

using std::to_string;

//_____________________________________________________________________________
template <typename HT>
G4THnManager<HT>::G4THnManager(const G4AnalysisManagerState& state,
                              const G4String& hnType)
  : fState(state)
{
  fHnManager = std::make_shared<G4HnManager>(hnType, state);
}

//_____________________________________________________________________________
template <typename HT>
G4THnManager<HT>::~G4THnManager()
{
  for ( auto t : fTVector ) {
    delete t;
  }
}

//
// protected methods
//

//_____________________________________________________________________________
template <typename HT>
HT*  G4THnManager<HT>::GetTInFunction(G4int id,
                                      std::string_view functionName, G4bool warn,
                                      G4bool onlyIfActive) const
{
  G4int index = id - fHnManager->GetFirstId();
  if ( index < 0 || index >= G4int(fTVector.size()) ) {
    if ( warn) {
      G4Analysis::Warn("Histogram " + to_string(id) + " does not exist.",
        fkClass, functionName);
    }
    return nullptr;
  }

  // Do not return histogram if inactive
  if ( fState.GetIsActivation() && onlyIfActive && ( ! fHnManager->GetActivation(id) ) ) {
    return nullptr;
  }

  return fTVector[index];
}

//_____________________________________________________________________________
template <typename HT>
G4int  G4THnManager<HT>::GetTId(const G4String& name, G4bool warn) const
{
  auto it = fNameIdMap.find(name);
  if ( it ==  fNameIdMap.end() ) {
    if ( warn) {
      G4Analysis::Warn("histogram " + name + " does not exist.",
        fkClass, "GetTId");
    }
    return G4Analysis::kInvalidId;
  }
  return it->second;
}

//_____________________________________________________________________________
template <typename HT>
G4bool  G4THnManager<HT>::IsVerbose(G4int verboseLevel) const
{
  return fState.IsVerbose(verboseLevel);
}

//_____________________________________________________________________________
template <typename HT>
void G4THnManager<HT>::Message(
  G4int level, const G4String& action, const G4String& objectType,
  const G4String& objectName, G4bool success) const
{
  fState.Message(level, action, objectType, objectName, success);
}

//_____________________________________________________________________________
template <typename HT>
void G4THnManager<HT>::AddTVector(const std::vector<HT*>& tVector)
{
  Message(G4Analysis::kVL4, "merge", "all " + fHnManager->GetHnType());

  // std::vector<tools::histo::h1d*>::const_iterator itw = h1Vector.begin();
  // std::vector<tools::histo::h1d*>::iterator it;
  // for (it = fH1Vector.begin(); it != fH1Vector.end(); it++ ) {
  //   (*it)->add(*(*itw++));
  // }
  auto itw = tVector.begin();
  for ( auto t : fTVector ) {
    t->add(*(*itw++));
  }

  Message(G4Analysis::kVL1, "merge", "all " + fHnManager->GetHnType());
}

//_____________________________________________________________________________
template <typename HT>
void  G4THnManager<HT>::Merge(
  G4Mutex& mergeMutex, G4THnManager<HT>* masterInstance)
{
  G4AutoLock lH1(&mergeMutex);
  masterInstance->AddTVector(fTVector);
  lH1.unlock();
}

//_____________________________________________________________________________
template <typename HT>
typename std::vector<HT*>::iterator G4THnManager<HT>::BeginT()
{
  return fTVector.begin();
}

//_____________________________________________________________________________
template <typename HT>
typename std::vector<HT*>::iterator G4THnManager<HT>::EndT()
{
  return fTVector.end();
}

//_____________________________________________________________________________
template <typename HT>
typename std::vector<HT*>::const_iterator G4THnManager<HT>::BeginConstT() const
{
  return fTVector.begin();
}

//_____________________________________________________________________________
template <typename HT>
typename std::vector<HT*>::const_iterator G4THnManager<HT>::EndConstT() const
{
  return fTVector.end();
}

//
// public methods
//

//_____________________________________________________________________________
template <typename HT>
G4int G4THnManager<HT>::RegisterT(HT* t, const G4String& name)
{
  G4int index = fTVector.size();
  fTVector.push_back(t);

  fHnManager->SetLockFirstId(true);
  fNameIdMap[name] = index + fHnManager->GetFirstId();
  return index + fHnManager->GetFirstId();
}

//_____________________________________________________________________________
template <typename HT>
G4bool G4THnManager<HT>::Reset()
{
// Reset histograms

  auto result = true;

  for ( auto t : fTVector ) {
    result &= t->reset();
  }

  return result;
}

//_____________________________________________________________________________
template <typename HT>
void
G4THnManager<HT>::ClearData()
{
  for ( auto t : fTVector ) {
    delete t;
  }

  fTVector.clear();
  fNameIdMap.clear();

  if ( fHnManager != nullptr ) {
    fHnManager->ClearData();
  }

  Message(G4Analysis::kVL2, "clear", G4Analysis::GetHnType<HT>());
}

//_____________________________________________________________________________
template <typename HT>
G4bool G4THnManager<HT>::IsEmpty() const
{
  return ! fTVector.size();
}

//_____________________________________________________________________________
template <typename HT>
HT* G4THnManager<HT>::GetT(G4int id) const
{
  return GetTInFunction(id, "GetT");
}