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/// \file optical/LXe/src/LXePrimaryGeneratorAction.cc
/// \brief Implementation of the LXePrimaryGeneratorAction class
//
//
#include "PrimaryGeneratorAction.hh"

#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"
#include "globals.hh"
#include <atomic>
#include <iomanip>
#include <fstream>
using namespace std;
atomic<int> ParGenNumber (0);
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

PrimaryGeneratorAction::PrimaryGeneratorAction(const char *inputfile)
{
  G4int n_particle = 1;
  fParticleGun = new G4ParticleGun(n_particle);

  // Read the cry input file
  std::ifstream inputFile;
  inputFile.open(inputfile,std::ios::in);
  char buffer[1000];

   if (inputFile.fail())
   {
      if( *inputfile !=0)  //....only complain if a filename was given
      G4cout << "PrimaryGeneratorAction: Failed to open CRY input file= " << inputfile << G4endl;
      InputState=-1;
    }else
   {
      std::string setupString("");
      while ( !inputFile.getline(buffer,1000).eof()) 
      {
      setupString.append(buffer);
      setupString.append(" ");
      }

      // CRYSetup *setup=new CRYSetup(setupString,"../data");
      CRYSetup *setup=new CRYSetup(setupString,"/Users/sdevip/work/cry/data");

      gen = new CRYGenerator(setup);

      // set random number generator
    
      RNGWrapper<CLHEP::HepRandomEngine>::set(CLHEP::HepRandom::getTheEngine(),&CLHEP::HepRandomEngine::flat);
      setup->setRandomFunction(RNGWrapper<CLHEP::HepRandomEngine>::rng);
     
      InputState=0;
   }
      // create a vector to store the CRY particle properties
      vect=new std::vector<CRYParticle*>;

      // Create the table containing all particle names
      particleTable = G4ParticleTable::GetParticleTable();

     // Create the messenger file
      gunMessenger = new PrimaryGeneratorMessenger(this);

}

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

PrimaryGeneratorAction::~PrimaryGeneratorAction()
{
  
    G4cout<<"ParGenNumber     "<<ParGenNumber<<G4endl;
    delete fParticleGun;
}

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

void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent){
  if (InputState != 0) {
    G4String* str = new G4String("CRY library was not successfully initialized");
    //G4Exception(*str);
    G4Exception("PrimaryGeneratorAction", "1",
                RunMustBeAborted, *str);
  }
  G4String particleName;
  vect->clear();
  gen->genEvent(vect);

  /*/....debug output
  G4cout << "\nEvent=" << anEvent->GetEventID() << " "
         << "CRY generated nparticles=" << vect->size()
         << G4endl; */

  for ( unsigned j=0; j<vect->size(); j++) {
    ParGenNumber=ParGenNumber+1;
    particleName=CRYUtils::partName((*vect)[j]->id());
//-------------------------------------------------------------------------------
    
   /*  //....debug output
        cout << "  "          << particleName << " "
         << "charge="      << (*vect)[j]->charge() << " "
         << setprecision(4)
         << "energy (MeV)=" << (*vect)[j]->ke()*MeV << " "
         << "pos (m)"
         << G4ThreeVector((*vect)[j]->x(), (*vect)[j]->y(), (*vect)[j]->z())
         << " " << "direction cosines "
         << G4ThreeVector((*vect)[j]->u(), (*vect)[j]->v(), (*vect)[j]->w())
         << " " << endl;
    */
//-------------------------------------------------------------------------------

    fParticleGun->SetParticleDefinition(particleTable->FindParticle((*vect)[j]->PDGid()));
    fParticleGun->SetParticleEnergy((*vect)[j]->ke()*MeV);
    G4double pox =((*vect)[j]->x()*10);
    G4double poy =((*vect)[j]->y()*10);
    G4double poz =(((*vect)[j]->z()+25.1));
    fParticleGun->SetParticlePosition(G4ThreeVector(pox*m, poy*m , poz*m));
     

      //debug postion 
      // cout<<pox<<"    "<<poy<<"   "<<poz<<"   "<<endl;
  
    fParticleGun->SetParticleMomentumDirection(G4ThreeVector((*vect)[j]->u(), (*vect)[j]->v(), (*vect)[j]->w()));
    fParticleGun->SetParticleTime((*vect)[j]->t());
    fParticleGun->GeneratePrimaryVertex(anEvent);
    delete (*vect)[j];
  }
}



//20200404
void PrimaryGeneratorAction::InputCRY()
{
  InputState=1;
}


void PrimaryGeneratorAction::UpdateCRY(std::string* MessInput)
{
  CRYSetup *setup=new CRYSetup(*MessInput,"/Users/sdevip/work/cry/data");

  gen = new CRYGenerator(setup);

  // set random number generator
  RNGWrapper<CLHEP::HepRandomEngine>::set(CLHEP::HepRandom::getTheEngine(),&CLHEP::HepRandomEngine::flat);
  setup->setRandomFunction(RNGWrapper<CLHEP::HepRandomEngine>::rng);
  InputState=0;

}

//----------------------------------------------------------------------------//
void PrimaryGeneratorAction::CRYFromFile(G4String newValue)
{
  // Read the cry input file
  std::ifstream inputFile;
  inputFile.open(newValue,std::ios::in);
  char buffer[1000];

  if (inputFile.fail()) {
    G4cout << "Failed to open input file " << newValue << G4endl;
    G4cout << "Make sure to define the cry library on the command line" << G4endl;
    InputState=-1;
  }else{
    std::string setupString("");
    while ( !inputFile.getline(buffer,1000).eof()) {
      setupString.append(buffer);
      setupString.append(" ");
    }

    CRYSetup *setup=new CRYSetup(setupString,"/Users/sdevip/work/cry/data");

    gen = new CRYGenerator(setup);

  // set random number generator
    RNGWrapper<CLHEP::HepRandomEngine>::set(CLHEP::HepRandom::getTheEngine(),&CLHEP::HepRandomEngine::flat);
    setup->setRandomFunction(RNGWrapper<CLHEP::HepRandomEngine>::rng);
    InputState=0;
  }
}