#ifndef ALICALOTRACKMCREADER_H
#define ALICALOTRACKMCREADER_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice     */
/* $Id:  $ */

//_________________________________________________________________________
// Class for reading data (Kinematics) in order to do prompt gamma 
// or other particle  correlations
// Separates generated particles into charged (CTS) 
// and neutral (PHOS or EMCAL acceptance)
//
//*-- Author: Gustavo Conesa (LNF-INFN) 
//////////////////////////////////////////////////////////////////////////////

//-- Author: Gustavo Conesa (INFN-LNF)

// --- ROOT system ---
class TArrayI   ;
class TParticle ;

// --- AliRoot system ---
#include "AliCaloTrackReader.h" 
class AliVCluster ;
class AliAODTrack ;
class AliAODEvent ;
class AliMCEvent  ;
class AliVEvent   ;

class AliCaloTrackMCReader : public AliCaloTrackReader {
  
 public: 
  AliCaloTrackMCReader() ; // ctor
  virtual ~AliCaloTrackMCReader() ;//virtual dtor
 private :
  AliCaloTrackMCReader(const AliCaloTrackMCReader & g) ; // cpy ctor	
  AliCaloTrackMCReader & operator = (const AliCaloTrackMCReader & g) ;//cpy assignment

public:
  void InitParameters();
  
  void Print(const Option_t * opt) const; 
  
  void SwitchOnPi0Decay()  { fDecayPi0 = kTRUE ; } 
  void SwitchOffPi0Decay() { fDecayPi0 = kFALSE ; } 
  Int_t IsPi0DecaySwitchedOn() const { return fDecayPi0 ; } 
  
  void AddNeutralParticlesArray(TArrayI & array)  
  { fNeutralParticlesArray   = new TArrayI(array) ; }
  TArrayI * GetNeutralParticlesArray() const   {return  fNeutralParticlesArray;}
  Bool_t SkipNeutralParticles(Int_t pdg) const ;
  
  void AddChargedParticlesArray(TArrayI & array)  
  { fChargedParticlesArray   = new TArrayI(array) ; }
  TArrayI * GetChargedParticlesArray() const   {return  fChargedParticlesArray;}
  Bool_t KeepChargedParticles(Int_t pdg) const ;

  void AddStatusArray(TArrayI & array)  
  { fStatusArray   = new TArrayI(array) ; }
  TArrayI * GetStatusArray() const   {return  fStatusArray;}
  
  void SwitchOnStatusSelection()  {fKeepAllStatus = kFALSE;}
  void SwitchOffStatusSelection() {fKeepAllStatus = kTRUE;}
  Bool_t KeepParticleWithStatus(Int_t status) const ;
  
  void GetVertex(Double_t v[3]) const ;
  Double_t* GetVertex(const Int_t evtIndex) const {return fVertex[evtIndex];}
  void GetVertex(Double_t vertex[3], const Int_t evtIndex) const 
    {vertex[0]=fVertex[evtIndex][0];  vertex[1]=fVertex[evtIndex][1];  vertex[2]=fVertex[evtIndex][2];}   
  
  Bool_t FillInputEvent(const Int_t iEntry, const char * currentFileName) ;
  AliVEvent*  GetInputEvent() const {return (AliVEvent *) GetMC();}
  void SetInputOutputMCEvent(AliVEvent* esd, AliAODEvent* aod, AliMCEvent* mc) ;
  
  void SetCaloClusterPID(const Int_t pdgCode, AliVCluster *calo) const ;
  void SetTrackChargeAndPID(const Int_t pdgCode, AliAODTrack *track) const ;
  
  void SwitchOnOverlapCheck()  {fCheckOverlap = kTRUE;}
  void SwitchOffOverlapCheck() {fCheckOverlap = kFALSE;}

  Float_t GetEMCALOverlapAngle()  const {return fEMCALOverlapAngle ;}
  Float_t GetPHOSOverlapAngle() const {return fPHOSOverlapAngle ;}
  void SetEMCALOverlapAngle(Float_t angle)  {fEMCALOverlapAngle = angle;}
  void SetPHOSOverlapAngle(Float_t angle) {fPHOSOverlapAngle = angle;}

 private:
  
  void CheckOverlap(const Float_t anglethres, const Int_t imom, Int_t & iPrimary, Int_t & index, TLorentzVector & mom, Int_t & pdg);
  void MakePi0Decay(TLorentzVector &p0, TLorentzVector &p1, TLorentzVector &p2) const ;//, Double_t &angle); 
  void FillCalorimeters(Int_t & iParticle, TParticle* particle, TLorentzVector momentum) ;
  
  private:
  Bool_t    fDecayPi0 ;              // If not decayed, decay pi0 by hand
  TArrayI * fNeutralParticlesArray ; // Do not keep neutral particles of this list in calorimeter.
  TArrayI * fChargedParticlesArray ; // Keep charged particles of this list in calorimeter.
  TArrayI * fStatusArray ;           // Keep particles with status of the list.
  Bool_t    fKeepAllStatus ;         // Do or do not select particles depending on their status code.
  Bool_t    fCheckOverlap;           // Check of overlapped photons from pi0 enter the calorimeter
  Float_t   fEMCALOverlapAngle;      // Aperture angle of photons from decay that is not resolved by EMCAL, in radians
  Float_t   fPHOSOverlapAngle;       // Aperture angle of photons from decay that is not resolved by PHOS, in radians
  Int_t     fIndex2ndPhoton;         // Check overlap of first decay photon already done, internal use.

  ClassDef(AliCaloTrackMCReader,3)
} ;


#endif //ALICALOTRACKMCREADER_H