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/// \file SteppingAction.cc
/// \brief Implementation of the SteppingAction class

#include "SteppingAction.hh"
#include "Run.hh"
#include "HistoManager.hh"

#include "G4SystemOfUnits.hh"
#include "G4RunManager.hh"
#include "G4Electron.hh"
#include "G4Gamma.hh"
#include "G4Proton.hh"
#include "G4DNAGenericIonsManager.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

SteppingAction::SteppingAction()
:G4UserSteppingAction()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

SteppingAction::~SteppingAction()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void SteppingAction::UserSteppingAction(const G4Step* aStep)
{
  const G4StepPoint* endPoint = aStep->GetPostStepPoint();
  G4String procName = endPoint->GetProcessDefinedStep()->GetProcessName();
  
  Run* run = static_cast<Run*>(
             G4RunManager::GetRunManager()->GetNonConstCurrentRun());
  
  G4bool transmit = (endPoint->GetStepStatus() <= fGeomBoundary);  
  if (transmit) { run->CountProcesses(procName); }
  else {                         
    // count real processes and sum track length
    G4double stepLength = aStep->GetStepLength();
    run->CountProcesses(procName);  
    run->SumTrack(stepLength);
  }
  
  // plot final state
  G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
     
  // scattered primary particle
  G4int id = 1;
  if (aStep->GetTrack()->GetTrackStatus() == fAlive) {
    G4double energy = endPoint->GetKineticEnergy();      
    analysisManager->FillH1(id,energy);
    id = 2;
    G4ThreeVector direction = endPoint->GetMomentumDirection();
    // assuming incident particle shot along x
    G4double costeta = direction.x(); 
    analysisManager->FillH1(id,costeta);     
  }  
  
  //secondaries
  const std::vector<const G4Track*>* secondary 
                                    = aStep->GetSecondaryInCurrentStep();    
  for (size_t lp=0; lp<(*secondary).size(); lp++) {
    G4double charge = (*secondary)[lp]->GetDefinition()->GetPDGCharge();
    if (charge != 0.) { id = 3; } else { id = 5; }
    G4double energy = (*secondary)[lp]->GetKineticEnergy();
    analysisManager->FillH1(id,energy);

    ++id;
    G4ThreeVector direction = (*secondary)[lp]->GetMomentumDirection();      
    G4double costeta = direction.x();
    analysisManager->FillH1(id,costeta);
      
    // energy tranferred to charged secondaries
    if (charge != 0.) { run->SumeTransf(energy); }         
  }
         
  // kill event after first interaction
  G4RunManager::GetRunManager()->AbortEvent();  
}
