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

////////////////////////////////////////////////
//--------------------------------------------- 
// Class reconstructing the mother particle of conversion gammas
//---------------------------------------------
////////////////////////////////////////////////

//Author Daniel Lohner (Daniel.Lohner@cern.ch)

#include "TLorentzVector.h"
#include "AliAODConversionParticle.h"
#include "AliAODConversionPhoton.h"
#include "AliKFConversionMother.h"
#include "AliKFParticle.h"

class AliAODConversionMother : public AliAODConversionParticle{

 public: 

     //Default Constructor
     AliAODConversionMother();

     // Constructor for ESD to AOD Conversion
     AliAODConversionMother(AliKFConversionMother *kf);

     //Constructor Decay Mother Particle
     AliAODConversionMother(AliAODConversionPhoton *y1,AliAODConversionPhoton *y2);

     //Destructor
     virtual ~AliAODConversionMother();

     // MC

     void SetMCLabel(Int_t i){fMCLabel=i;}
     Int_t GetMCLabel(){return fMCLabel;}
     TParticle *GetMCParticle(AliStack *fMCStack);
     Bool_t IsTrueMeson(AliStack *fMCStack,Int_t pdgcode);

     ///Set the Chi2 of reconstructed conversion gamma
     void SetChi2(Float_t chi2) {fChi2 = chi2;}

     //Get the Chi2 of particle
     Float_t Chi2() const {return fChi2;}

     ///Set track or MC labels
     void SetLabel1(Int_t label){fLabel[0] = label;}
     void SetLabel2(Int_t label){fLabel[1] = label;}
     void SetLabel3(Int_t label){fLabel[2] = label;}
     void SetLabels(Int_t label1, Int_t label2, Int_t label3 = 0){fLabel[0] = label1; fLabel[1] = label2; fLabel[2] = label3;}

     Int_t GetLabel(Int_t i) const {return fLabel[i];}
     Int_t GetLabel1() const {return fLabel[0];}
     Int_t GetLabel2() const {return fLabel[1];}
     Int_t GetLabel3() const {return fLabel[2];}
		
     Double_t GetProductionRadius() const {return TMath::Sqrt(fProductionVtx[0]*fProductionVtx[0]+fProductionVtx[1]*fProductionVtx[1]);}
     Double_t GetProductionX() const {return fProductionVtx[0];}
     Double_t GetProductionY() const {return fProductionVtx[1];}
     Double_t GetProductionZ() const {return fProductionVtx[2];}

     Float_t GetDCABetweenPhotons() const {return fdcaBetweenPhotons;}
     Float_t GetDCAZMotherPrimVtx() const {return fdcaZPrimVtx;}
     Float_t GetDCARMotherPrimVtx() const {return fdcaRPrimVtx;}
     UChar_t GetMesonQuality() const {return fQuality;}
     	
     Double_t GetOpeningAngle() const { return fOpeningAngle;}

     Double_t GetAlpha() const { return fAlpha;}

     void SetWeight(Double_t weight) {fWeight=weight;}
     Double_t GetWeight() const {return fWeight;}

     Float_t CalculateDistanceBetweenPhotons(AliAODConversionPhoton* y1, AliAODConversionPhoton* y2 , Double_t prodPoint[3]);
     void CalculateDistanceOfClossetApproachToPrimVtx(const AliVVertex* primVertex);
     void DetermineMesonQuality(AliAODConversionPhoton* y1, AliAODConversionPhoton* y2);
        
private:
    Int_t fLabel[3]; // Labels of the decay photons
    Int_t fMCLabel; // MC Label
    Float_t fChi2; // Chi sq of reconstructed mother
    Double_t fOpeningAngle;
    Double_t fAlpha;
    Double_t fWeight; // Weight for BG Calculation
    Float_t fdcaBetweenPhotons; // dca between the two photons
    Double_t fProductionVtx[3]; // Production vertex
    Float_t fdcaZPrimVtx; // dca Z of meson to primary vertex
    Float_t fdcaRPrimVtx; // dca R of meson to primary vertex
    UChar_t fQuality; // Quality of the meson:
                       // 0: garbage
                       // 1: both photons quality 1
                       // 2: 1 photon quality 1, 1 photon quality 2
                       // 3: 1 photon quality 1, 1 photon quality 3
                       // 4: both photons quality 2
                       // 5: 1 photon quality 2, 1 photon quality 3
                       // 6: both photons quality 3
    
    
    ClassDef(AliAODConversionMother,4)
};

#endif