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

/*$Id$*/
// Revision of includes 07/05/2004


///////////////////////////////////////////////////
// Reconstructed track in ALICE dimuon spectrometer
///////////////////////////////////////////////////

#include <TClonesArray.h>

#include "AliMUONTrackParam.h" // object belongs to the class
#include "AliMUONHitForRec.h"  // object belongs to the class

//const Int_t kMaxTrackingChamber=10;
        // not used

class TObjArray;
class TVirtualFitter;
class AliMUONEventReconstructor;
class AliMUONHitForRec;
class AliMUONSegment;

class AliMUONTrack : public TObject 
{
 public:
  AliMUONTrack(); // Default constructor
  virtual ~AliMUONTrack(); // Destructor
  AliMUONTrack (const AliMUONTrack& AliMUONTrack); // copy constructor
  AliMUONTrack& operator=(const AliMUONTrack& AliMUONTrack); // assignment operator

  AliMUONTrack(AliMUONSegment* BegSegment, AliMUONSegment* EndSegment, AliMUONEventReconstructor* EventReconstructor); // Constructor from two Segment's
  AliMUONTrack(AliMUONSegment* Segment, AliMUONHitForRec* HitForRec, AliMUONEventReconstructor* EventReconstructor); // Constructor from one Segment and one HitForRec
  void Remove(void);

  AliMUONEventReconstructor* GetEventReconstructor(void) const {return fEventReconstructor;}
  AliMUONTrackParam* GetTrackParamAtVertex(void) {return &fTrackParamAtVertex;}
  void SetTrackParamAtVertex(void); // Set track parameters at vertex from last stations 4 & 5
  void SetTrackParamAtVertex(AliMUONTrackParam* TrackParam) {fTrackParamAtVertex = *TrackParam;}
  TClonesArray *GetTrackParamAtHit(void) const {return fTrackParamAtHit;}
  TClonesArray *GetHitForRecAtHit(void) const {return fHitForRecAtHit;}
  void ResetTrackParamAtHit(void) { fTrackParamAtHit->Delete(); }
  void ResetHitForRecAtHit(void) { fHitForRecAtHit->Delete(); }
  void AddTrackParamAtHit(const AliMUONTrackParam *trackParam) 
    {new ((*fTrackParamAtHit)[fTrackParamAtHit->GetEntriesFast()]) AliMUONTrackParam(*trackParam);}
  void AddHitForRecAtHit(const AliMUONHitForRec *hitForRec) 
    {new ((*fHitForRecAtHit)[fHitForRecAtHit->GetEntriesFast()]) AliMUONHitForRec(*hitForRec);}

  TObjArray* GetTrackHitsPtr(void) const {return fTrackHitsPtr;}
  Int_t GetNTrackHits(void) const {return fNTrackHits;}
  void SetNTrackHits(Int_t nTrackHits) {fNTrackHits = nTrackHits;}
  Int_t GetFitMCS(void) const {return fFitMCS;}
  Int_t GetFitNParam(void) const {return fFitNParam;}
  Int_t GetFitStart(void) const {return fFitStart;}
  Double_t GetFitFMin(void) const {return fFitFMin;}
  Bool_t GetMatchTrigger(void) const {return fMatchTrigger;}
  Double_t GetChi2MatchTrigger(void) const {return fChi2MatchTrigger;}
  void SetFitMCS(Int_t FitMCS);
  void SetFitNParam(Int_t FitNParam);
  void SetFitStart(Int_t FitStart);

  AliMUONTrackParam* GetTrackParamAtFirstHit(void) const;

  void RecursiveDump(void) const; // Recursive dump (with track hits)
  void Fit(); // Fit
  void AddSegment(AliMUONSegment* Segment); // Add Segment
  void AddHitForRec(AliMUONHitForRec* HitForRec); // Add HitForRec
  void SetTrackParamAtHit(Int_t indexHit, AliMUONTrackParam *TrackParam) const;
  Int_t HitsInCommon(AliMUONTrack* Track) const;
  void MatchTriggerTrack(TClonesArray* TriggerTrackArray);
  Bool_t* CompatibleTrack(AliMUONTrack* Track, Double_t Sigma2Cut) const; // return array of compatible chamber
  
  Int_t GetTrackID() const {return fTrackID;}
  void SetTrackID(Int_t trackID) {fTrackID = trackID;}

  static TVirtualFitter* Fitter(void) {return fgFitter;}

 protected:
 private:
  static TVirtualFitter* fgFitter; //!                  Pointer to track fitter
  AliMUONEventReconstructor* fEventReconstructor; //!   Pointer to EventReconstructor
  AliMUONTrackParam fTrackParamAtVertex; // Track parameters at vertex
  TClonesArray *fTrackParamAtHit; // Track parameters at hit
  TClonesArray *fHitForRecAtHit; // Cluster parameters at hit
  TObjArray *fTrackHitsPtr; //!  Pointer to array of pointers to TrackHit's
  Int_t fNTrackHits; // Number of TrackHit's
  Int_t fFitMCS; // 0(1) for fit without(with) multiple Coulomb scattering
  Int_t fFitNParam; // 3(5) for fit with 3(5) parameters
  Int_t fFitStart; // 0 or 1 for fit starting from parameters at vertex (0) or at first TrackHit(1)
  Double_t fFitFMin; // minimum value of the function minimized by the fit
  Bool_t fMatchTrigger; // 1 if track matches with trigger track, 0 if not
  Double_t fChi2MatchTrigger; // chi2 of trigger/track matching 
 
  Int_t fTrackID; // track ID = track number in TrackRefs

  ClassDef(AliMUONTrack, 2) // Reconstructed track in ALICE dimuon spectrometer
    };
	
#endif