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

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

#include <iostream>

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

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

// 
// protected methods
//

//_____________________________________________________________________________
template <typename T>
T*  G4THnManager<T>::GetTInFunction(G4int id, 
                                    G4String functionName, G4bool warn,
                                    G4bool onlyIfActive) const
{
  G4int index = id - fHnManager->GetFirstId();
  if ( index < 0 || index >= G4int(fTVector.size()) ) {
    if ( warn) {
      G4String inFunction = "G4THnManager::";
      inFunction += functionName;
      G4ExceptionDescription description;
      description << "      " << "histogram " << id << " does not exist.";
      G4Exception(inFunction, "Analysis_W011", JustWarning, description);
    }
    return nullptr;         
  }
  
  // Do not return histogram if inactive 
  if ( fState.GetIsActivation() && onlyIfActive && ( ! fHnManager->GetActivation(id) ) ) {
    return nullptr; 
  }  
  
  return fTVector[index];
} 

//_____________________________________________________________________________
template <typename T>
G4int G4THnManager<T>::RegisterT(T* 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 T>
G4int  G4THnManager<T>::GetTId(const G4String& name, G4bool warn) const
{
  auto it = fNameIdMap.find(name);
  if ( it ==  fNameIdMap.end() ) {  
    if ( warn) {
      G4String inFunction = "G4THnManager::GetH1Id";
      G4ExceptionDescription description;
      description << "      " << "histogram " << name << " does not exist.";
      G4Exception(inFunction, "Analysis_W011", JustWarning, description);
    }
    return G4Analysis::kInvalidId;         
  }
  return it->second;
}  

//_____________________________________________________________________________
template <typename T>
void G4THnManager<T>::AddTVector(const std::vector<T*>& tVector)
{
#ifdef G4VERBOSE
    if ( fState.GetVerboseL4() ) 
      fState.GetVerboseL4()->Message("merge", "all " + fHnManager->GetHnType(), "");
#endif
  // 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++));
  }  
#ifdef G4VERBOSE
    if ( fState.GetVerboseL1() ) 
      fState.GetVerboseL1()->Message("merge", "all " + fHnManager->GetHnType(), "");
#endif
}  

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

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

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

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

// 
// public methods
//

//_____________________________________________________________________________
template <typename T>
G4bool G4THnManager<T>::Reset()
{
// Reset histograms and ntuple

  G4bool finalResult = true;

  for ( auto t : fTVector ) {
    G4bool result = t->reset();
    if ( ! result ) finalResult = false;
  }  
  
  return finalResult;
}  

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