//
// *** Class AliRsnEvent ***
//
// A container for a collection of AliRsnDaughter objects from an event.
// Contains also the primary vertex, useful for some cuts.
// In order to retrieve easily the tracks which have been identified
// as a specific type and charge, there is an array of indexes which
// allows to avoid to loop on all tracks and have only the neede ones.
//
// authors: A. Pulvirenti (email: alberto.pulvirenti@ct.infn.it)
//          M. Vala (email: martin.vala@cern.ch)
//

#ifndef ALIRSNEVENT_H
#define ALIRSNEVENT_H

#include "AliMCEvent.h"
#include "AliESDEvent.h"
#include "AliAODEvent.h"
#include "AliRsnDaughter.h"

class AliVEvent;
class AliRsnCutPID;
class AliESDtrackCuts;

class AliRsnEvent : public TObject
{
  public:

    AliRsnEvent(AliVEvent *ref = 0, AliVEvent *refMC = 0);
    AliRsnEvent(const AliRsnEvent& copy);
    AliRsnEvent& operator= (const AliRsnEvent& copy);
    virtual ~AliRsnEvent();
    
    // basic setters/getters
    void       SetRef  (AliVEvent *ref)     {fRef = ref;}
    void       SetRefMC(AliVEvent *refmc)   {fRefMC = refmc;}
    void       SetLeadingIndex(Int_t i)     {fLeading = i;}
    void       SetLocalID(Int_t i)          {fLocalID = i;}
    AliVEvent* GetRef()                     {return fRef;}
    AliVEvent* GetRefMC()                   {return fRefMC;}
    Int_t      GetLeadingIndex() const      {return fLeading;}
    Int_t      GetLeadingParticleID() const {return fLeading;}
    Int_t      GetLocalID() const           {return fLocalID;}
    
    // getters which convert into allowed input types
    AliESDEvent* GetRefESD()   {return dynamic_cast<AliESDEvent*>(fRef);}
    AliAODEvent* GetRefAOD()   {return dynamic_cast<AliAODEvent*>(fRef);}
    AliMCEvent*  GetRefMCESD() {return dynamic_cast<AliMCEvent*> (fRefMC);}
    AliAODEvent* GetRefMCAOD() {return dynamic_cast<AliAODEvent*>(fRefMC);}
    Bool_t       IsESD()       {return (GetRefESD() != 0x0);}
    Bool_t       IsAOD()       {return (GetRefAOD() != 0x0);}
    
    // advanced getters
    Double_t         GetVz();
    Int_t            GetMultiplicity(AliESDtrackCuts *cuts = 0x0);
    
    // setters for a daughter
    Bool_t           SetDaughter  (AliRsnDaughter &daughter, Int_t index, AliRsnDaughter::ERefType type = AliRsnDaughter::kTrack);
    Bool_t           SetDaughterMC(AliRsnDaughter &daughter, Int_t index);
    AliRsnDaughter   GetDaughter  (Int_t i, AliRsnDaughter::ERefType type = AliRsnDaughter::kTrack);
    AliRsnDaughter   GetDaughterMC(Int_t i);
    Int_t            GetAbsoluteSum();
    Bool_t           ConvertAbsoluteIndex(Int_t index, Int_t &realIndex, AliRsnDaughter::ERefType &type);
    
    // leading particle stuff
    void             SetLeadingParticle(AliRsnDaughter &leading) {if (fLeading >= 0) SetDaughter(leading, fLeading);}
    Int_t            SelectLeadingParticle(Double_t ptMin = 0.0, AliRsnCutPID *cutPID = 0x0);
    Double_t         GetAverageMomentum(Int_t &count, AliRsnCutPID *cutPID = 0x0);
    Bool_t           GetAngleDistr(Double_t &angleMean, Double_t &angleRMS, AliRsnDaughter reference);
    
    // statig getters
    static AliRsnEvent *GetCurrentEvent1()                                 {return fgRsnEvent1;}
    static AliRsnEvent *GetCurrentEvent2()                                 {return fgRsnEvent2;}
    static void         SetCurrentEvent1(AliRsnEvent *event, Int_t id = 0) {fgRsnEvent1 = event; fgRsnEvent1->SetLocalID(id);}
    static void         SetCurrentEvent2(AliRsnEvent *event, Int_t id = 0) {fgRsnEvent2 = event; fgRsnEvent2->SetLocalID(id);}
    static Bool_t       IsCurrentEvent1()                                  {if (fgRsnEvent1 != 0x0) return kTRUE; return kFALSE;}
    static Bool_t       IsCurrentEvent2()                                  {if (fgRsnEvent2 != 0x0) return kTRUE; return kFALSE;}
    static Bool_t       SameEvent()                                        {if (fgRsnEvent1 == fgRsnEvent2) return kTRUE; return kFALSE;}

  private:
  
    Bool_t SetDaughterESDtrack  (AliRsnDaughter &target, Int_t index);
    Bool_t SetDaughterAODtrack  (AliRsnDaughter &target, Int_t index);
    Bool_t SetDaughterESDv0     (AliRsnDaughter &target, Int_t index);
    Bool_t SetDaughterAODv0     (AliRsnDaughter &target, Int_t index);
    Bool_t SetDaughterESDcascade(AliRsnDaughter &target, Int_t index);
    Bool_t SetDaughterAODcascade(AliRsnDaughter &target, Int_t index);
    Bool_t SetMCInfoESD         (AliRsnDaughter &target);
    Bool_t SetMCInfoAOD         (AliRsnDaughter &target);

    AliVEvent          *fRef;         //  pointer to input event
    AliVEvent          *fRefMC;       //  pointer to reference MC event (if any)
    Int_t               fLeading;     //  index of leading track
    Int_t               fLocalID;     //  identification number used locally
    
    static AliRsnEvent *fgRsnEvent1;  //! pointer to current event #1 (default current event)
    static AliRsnEvent *fgRsnEvent2;  //! pointer to current event #2 (different from the other when doing mixing)

    ClassDef(AliRsnEvent, 4);
};

#endif