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// Author: Ivana Hrivnacova, 25/07/2014 (ivana@ipno.in2p3.fr)

#include "G4CsvRNtupleManager.hh"
#include "G4CsvRFileManager.hh"
#include "G4AnalysisManagerState.hh"
#include "G4AnalysisUtilities.hh"

using namespace G4Analysis;

//_____________________________________________________________________________
G4CsvRNtupleManager::G4CsvRNtupleManager(const G4AnalysisManagerState& state)
 : G4TRNtupleManager<tools::rcsv::ntuple>(state)
{}

//
// private methods
//

//_____________________________________________________________________________
G4int G4CsvRNtupleManager::ReadNtupleImpl(const G4String& ntupleName,
                                          const G4String& fileName,
                                          const G4String& dirName,
                                          G4bool isUserFileName)
{
  Message(kVL4, "read", "ntuple", ntupleName);

  // Ntuples are saved per object and per thread
  // but apply the ntuple name and the thread suffixes
  // only if fileName is not provided explicitly
  G4String fullFileName = fileName;
  if ( ! isUserFileName ) {
    fullFileName = fFileManager->GetNtupleFileName(ntupleName);
  }

  // Update directory path
  if ( ! dirName.empty() ) {
    fullFileName = "./" + dirName + "/" + fullFileName;
  }

  // Open file
  if ( ! fFileManager->OpenRFile(fullFileName) ) return kInvalidId;
  auto ntupleFile = fFileManager->GetRFile(fullFileName);

  // Create ntuple
  auto rntuple = new tools::rcsv::ntuple(*ntupleFile);
  auto id = SetNtuple(new G4TRNtupleDescription<tools::rcsv::ntuple>(rntuple));

  Message(kVL2, "read", "ntuple", ntupleName, id > kInvalidId);

  return id;
}

//_____________________________________________________________________________
G4bool G4CsvRNtupleManager::GetTNtupleRow(
  G4TRNtupleDescription<tools::rcsv::ntuple>* ntupleDescription)
{
  auto ntuple = ntupleDescription->fNtuple;

  auto isInitialized = ntupleDescription->fIsInitialized;
  if ( ! isInitialized ) {
    auto ntupleBinding = ntupleDescription->fNtupleBinding;
    if ( ! ntuple->initialize(G4cout, *ntupleBinding) ) {
      Warn("Ntuple initialization failed !!", fkClass, "GetTNtupleRow");
      return false;
    }
    ntupleDescription->fIsInitialized = true;
    ntuple->start();
  }

  auto next = ntuple->next();
  if ( next ) {
    if ( ! ntuple->get_row() ) {
      Warn("Ntuple get_row() failed !!", fkClass, "GetTNtupleRow");
      return false;
    }
  }

  return next;
}