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//
/// \file RunAction.cc
/// \brief Implementation of the RunAction class
//
//
//
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#include "RunAction.hh"
#include "HistoManager.hh"

#include "G4Run.hh"
#include "G4RunManager.hh"
#include "G4UnitsTable.hh"

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RunAction::RunAction(HistoManager* histo)
: G4UserRunAction(),
  fHistoManager(histo),
  fSumEAbs(0.), fSum2EAbs(0.),
  fSumEGap(0.), fSum2EGap(0.),
  fSumLAbs(0.), fSum2LAbs(0.),
  fSumLGap(0.), fSum2LGap(0.)    
{}

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RunAction::~RunAction()
{}

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void RunAction::BeginOfRunAction(const G4Run* aRun)
{ 
  G4cout << "### Run " << aRun->GetRunID() << " start." << G4endl;
    
  //initialize cumulative quantities
  //
  fSumEAbs = fSum2EAbs =fSumEGap = fSum2EGap = 0.;
  fSumLAbs = fSum2LAbs =fSumLGap = fSum2LGap = 0.;
  
  //histograms
  //
  fHistoManager->Book(); 
}

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void RunAction::FillPerEvent(G4double EAbs, G4double EGap,
                                  G4double LAbs, G4double LGap)
{
  //accumulate statistic
  //
  fSumEAbs += EAbs;  fSum2EAbs += EAbs*EAbs;
  fSumEGap += EGap;  fSum2EGap += EGap*EGap;
  
  fSumLAbs += LAbs;  fSum2LAbs += LAbs*LAbs;
  fSumLGap += LGap;  fSum2LGap += LGap*LGap;  
}

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void RunAction::EndOfRunAction(const G4Run* aRun)
{
  G4int NbOfEvents = aRun->GetNumberOfEvent();
  if (NbOfEvents == 0) return;
  
  //compute statistics: mean and rms
  //
  fSumEAbs /= NbOfEvents; fSum2EAbs /= NbOfEvents;
  G4double rmsEAbs = fSum2EAbs - fSumEAbs*fSumEAbs;
  if (rmsEAbs >0.) rmsEAbs = std::sqrt(rmsEAbs); else rmsEAbs = 0.;
  
  fSumEGap /= NbOfEvents; fSum2EGap /= NbOfEvents;
  G4double rmsEGap = fSum2EGap - fSumEGap*fSumEGap;
  if (rmsEGap >0.) rmsEGap = std::sqrt(rmsEGap); else rmsEGap = 0.;
  
  fSumLAbs /= NbOfEvents; fSum2LAbs /= NbOfEvents;
  G4double rmsLAbs = fSum2LAbs - fSumLAbs*fSumLAbs;
  if (rmsLAbs >0.) rmsLAbs = std::sqrt(rmsLAbs); else rmsLAbs = 0.;
  
  fSumLGap /= NbOfEvents; fSum2LGap /= NbOfEvents;
  G4double rmsLGap = fSum2LGap - fSumLGap*fSumLGap;
  if (rmsLGap >0.) rmsLGap = std::sqrt(rmsLGap); else rmsLGap = 0.;
  
  //print
  //
  G4cout
     << "\n--------------------End of Run------------------------------\n"
     << "\n mean Energy in Absorber : " << G4BestUnit(fSumEAbs,"Energy")
     << " +- "                          << G4BestUnit(rmsEAbs,"Energy")  
     << "\n mean Energy in Gap      : " << G4BestUnit(fSumEGap,"Energy")
     << " +- "                          << G4BestUnit(rmsEGap,"Energy")
     << G4endl;
     
  G4cout
     << "\n mean trackLength in Absorber : " << G4BestUnit(fSumLAbs,"Length")
     << " +- "                               << G4BestUnit(rmsLAbs,"Length")  
     << "\n mean trackLength in Gap      : " << G4BestUnit(fSumLGap,"Length")
     << " +- "                               << G4BestUnit(rmsLGap,"Length")
     << "\n------------------------------------------------------------\n"
     << G4endl;
     
  //save histograms
  //
  fHistoManager->PrintStatistic();
  fHistoManager->Save();   
}

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