// Macro created 20/09/2006 by S.Spataro
// It creates a geant simulation file for emc

sim_emc(Int_t nEvents = 10, Float_t mom = 1.){
  // flag which define if the full PANDA geomerty is used or only EMC
  Bool_t useFullPANDAGeometry=false;
  TStopwatch timer;
  timer.Start();
  gDebug=0;

  // Load basic libraries
  // If it does not work,  please check the path of the libs and put it by hands
  gROOT->LoadMacro("$VMCWORKDIR/gconfig/rootlogon.C");
  rootlogon();
  
  TString digiFile = "emc.par";
  TString parFile = "simparams.root";
  
  FairRunSim *fRun = new FairRunSim();

  // set the MC version used
  // ------------------------
  fRun->SetName("TGeant3");
  
  fRun->SetOutputFile("sim_emc.root");

  // Set the parameters
  //-------------------------------
  TString emcDigiFile = gSystem->Getenv("VMCWORKDIR");
  emcDigiFile += "/macro/params/";
  emcDigiFile += digiFile;
 
  FairRuntimeDb* rtdb = fRun->GetRuntimeDb();
  FairParAsciiFileIo* parIo1 = new FairParAsciiFileIo();
  parIo1->open(emcDigiFile.Data(),"in");
  rtdb->setFirstInput(parIo1);        
  Bool_t kParameterMerged=kTRUE;
	
  FairParRootFileIo* output=new FairParRootFileIo(kParameterMerged);
  output->open(parFile);
  rtdb->setOutput(output);
  
  // Set Material file Name
  //-----------------------
  fRun->SetMaterials("media_pnd.geo");

  // Create and add detectors
  //-------------------------
  FairModule *Cave= new PndCave("CAVE");
  Cave->SetGeometryFileName("pndcave.geo");
  fRun->AddModule(Cave); 
  
  PndEmc *Emc = new PndEmc("EMC",kTRUE);
  Emc->SetGeometryVersion(15);
  // See PndEmc::SetGeometryVersion() for available geometries and add there new one if necessary
  Emc->SetStorageOfData(kFALSE);
  fRun->AddModule(Emc);

  if (useFullPANDAGeometry)
  {
	FairModule *Magnet= new PndMagnet("MAGNET");
	//Magnet->SetGeometryFileName("FullSolenoid_V842.root");
	Magnet->SetGeometryFileName("FullSuperconductingSolenoid_v831.root");
	fRun->AddModule(Magnet);

	FairModule *Dipole= new PndMagnet("MAGNET");
	Dipole->SetGeometryFileName("dipole.geo");
	fRun->AddModule(Dipole);

	FairModule *Pipe= new PndPipe("PIPE");
	fRun->AddModule(Pipe);

	FairDetector *Stt= new PndStt("STT", kTRUE);
	Stt->SetGeometryFileName("straws_skewed_blocks_35cm_pipe.geo");
	fRun->AddModule(Stt);

	FairDetector *Mvd = new PndMvdDetector("MVD", kTRUE);
	Mvd->SetGeometryFileName("Mvd-2.1_FullVersion.root");
	fRun->AddModule(Mvd);

	PndMdt *Muo = new PndMdt("MDT",kTRUE);
	Muo->SetBarrel("fast");
	Muo->SetEndcap("fast");
	Muo->SetMuonFilter("fast");
	Muo->SetMdtMagnet(kTRUE);
	Muo->SetMdtMFIron(kTRUE);
	fRun->AddModule(Muo);

	FairDetector *Gem = new PndGemDetector("GEM", kTRUE);
	Gem->SetGeometryFileName("gem_3Stations.root");
	fRun->AddModule(Gem);

	PndDsk* Dsk = new PndDsk("DSK", kTRUE);
	Dsk->SetGeometryFileName("dsk.root");
	Dsk->SetStoreCerenkovs(kFALSE);
	Dsk->SetStoreTrackPoints(kFALSE);
	fRun->AddModule(Dsk);

	PndDrc *Drc = new PndDrc("DIRC", kTRUE);
	Drc->SetRunCherenkov(kFALSE); // for fast sim Cherenkov -> kFALSE
	fRun->AddModule(Drc);
	
	FairDetector *Fts= new PndFts("FTS", kTRUE);
	Fts->SetGeometryFileName("fts.geo");
	fRun->AddModule(Fts);
  }
  // Create and Set Event Generator
  //-------------------------------

  FairPrimaryGenerator* primGen = new FairPrimaryGenerator();
  fRun->SetGenerator(primGen);

  // Box Generator: 
  FairBoxGenerator* boxGen = new FairBoxGenerator(22, 1); // 13 = muon; 1 = multipl. // 211 = pi+
  // first number: PDG particle code: 2nd number: particle multiplicity per event

  boxGen->SetPRange(mom,mom); // GeV/c
  boxGen->SetPhiRange(0., 360.); // Azimuth angle range [degree]
  boxGen->SetThetaRange(0., 180.); // Polar angle in lab system range [degree]
  boxGen->SetXYZ(0., 0., 0.); // vertex coordinates [mm]
  primGen->AddGenerator(boxGen);  

  
  // Create and Set Magnetic Field
  //-------------------------------
  fRun->SetBeamMom(15);
 	//---------------------Create and Set the Field(s)---------- 
  PndMultiField *fField= new PndMultiField("FULL");
  fRun->SetField(fField);


  // EMC Hit producer
  //-------------------------------
  PndEmcHitProducer* emcHitProd = new PndEmcHitProducer();
  fRun->AddTask(emcHitProd);
  
  /**Initialize the session*/
  fRun->Init();
  
  PndMultiFieldPar* Par = (PndMultiFieldPar*) rtdb->getContainer("PndMultiFieldPar");
  if (fField) {  Par->SetParameters(fField); }
  Par->setInputVersion(fRun->GetRunId(),1);
  Par->setChanged();

  rtdb->setOutput(output);
  rtdb->saveOutput();
  rtdb->print();

  // Transport nEvents
  // -----------------
  fRun->Run(nEvents);

  timer.Stop();

  Double_t rtime = timer.RealTime();
  Double_t ctime = timer.CpuTime();
  printf("RealTime=%f seconds, CpuTime=%f seconds\n",rtime,ctime);

}