#ifndef ALITOFTRACKER_H
#define ALITOFTRACKER_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */
// AliTOFtracker Class
// Task: Perform association of the ESD tracks to TOF Clusters
// and Update ESD track with associated TOF Cluster parameters 
//
// -- Authors : S. Arcelli, C. Zampolli (Bologna University and INFN) 
// -- Contacts: Annalisa.De.Caro@cern.ch
// --         : Chiara.Zampolli@bo.infn.it
// --         : Silvia.Arcelli@bo.infn.it
//--------------------------------------------------------------------

/* $Id$ */

#include "AliTracker.h"
#include "AliTOFpidESD.h"
#include "AliESD.h"
#include "TClonesArray.h"

class AliTOFGeometry;

class AliTOFtracker : public AliTracker {

enum {kMaxCluster=77777}; //maximal number of the TOF clusters

public:

 AliTOFtracker(AliTOFGeometry* geom, Double_t parPID[2]); 
 AliTOFtracker(const AliTOFtracker &t); //Copy Ctor 
  virtual ~AliTOFtracker() {delete fTOFpid;}
  virtual Int_t Clusters2Tracks(AliESD* /*event*/) {return -1;};
  virtual Int_t PropagateBack(AliESD* event);
  virtual Int_t RefitInward(AliESD* /*event*/) {return -1;};
  virtual Int_t LoadClusters(TTree *dTree); // Loading Clusters from Digits
  virtual void  UnloadClusters();// UnLoad Clusters
  virtual AliCluster *GetCluster(Int_t /*index*/) const {return NULL;};

public:
  class AliTOFcluster {
  public:
    AliTOFcluster(Double_t *h, Int_t *l, Int_t *ind, Int_t idx) {
      fR=h[0]; fPhi=h[1]; fZ=h[2]; fTDC=h[3]; fADC=h[4];
      fLab[0]=l[0]; fLab[1]=l[1]; fLab[2]=l[2];
      fIdx=idx;
      fdetIndex[0]=ind[0];
      fdetIndex[1]=ind[1];
      fdetIndex[2]=ind[2];
      fdetIndex[3]=ind[3];
      fdetIndex[4]=ind[4];
    }
    void Use() {fADC=-fADC;}

    Double_t GetR() const {return fR;}  // Cluster Radius
    Double_t GetPhi() const {return fPhi;} // Cluster Phi
    Double_t GetZ()   const {return fZ;} // Cluster Z
    Double_t GetTDC() const {return fTDC;} // Cluster ToF
    Double_t GetADC() const {return TMath::Abs(fADC);} // Cluster Charge
    Int_t IsUsed() const {return (fADC<0) ? 1 : 0;} // Flagging
    Int_t GetLabel(Int_t n) const {return fLab[n];} // Labels of tracks in Cluster
    Int_t GetDetInd(Int_t n) const {return fdetIndex[n];} //Cluster Det Indeces
    Int_t GetIndex() const {return fIdx;} // Cluster Index

  private:

    Int_t fLab[3]; //track labels
    Int_t fIdx;    //index of this cluster
    Int_t fdetIndex[5]; //Cluster detector Indeces (plate,strip,..)
    Double_t fR;   //r-coordinate
    Double_t fPhi; //phi-coordinate
    Double_t fZ;   //z-coordinate
    Double_t fTDC; //TDC count
    Double_t fADC; //ADC count

  };

private:

  Int_t InsertCluster(AliTOFcluster *c); // Fills TofClusters Array
  Int_t FindClusterIndex(Double_t z) const; // Returns cluster index 
  void  MatchTracks(Bool_t mLastStep); // Matching Algorithm 
  void  CollectESD(); // Select starting Set for Matching 
  void  Init();

  AliTOFGeometry*  fGeom;                 // Pointer to TOF geometry
  AliTOFpidESD*    fTOFpid;               // Pointer to TOF PID
  AliTOFcluster *fClusters[kMaxCluster];  // pointers to the TOF clusters

  Bool_t fHoles;         // flag for Geometry Version(w/wo Holes) temporary!
  Int_t fN;              // Number of Clusters
  Int_t fNseeds;         // Number of track seeds  
  Int_t fNseedsTOF;      // TPC BP tracks
  Int_t fngoodmatch;     // Correctly matched  tracks
  Int_t fnbadmatch;      // Wrongly matched tracks
  Int_t fnunmatch;       // Unmatched tracks
  Int_t fnmatch;         // Total matched tracks
 
  Float_t fR;            // Intermediate radius in TOF, used in matching
  Float_t fTOFHeigth;    // Inner TOF radius for propagation
  Float_t fdCut;         // Cut on minimum distance track-pad in matching 
  Float_t fDx;           // Pad Size in X   
  Float_t fDy;           // Pad Size in Y (== X  TOF convention)
  Float_t fDz;           // Pad Size in Z 
  TClonesArray* fTracks; //! pointer to the TClonesArray with TOF tracks
  TClonesArray* fSeeds;  //! pointer to the TClonesArray with ESD tracks

  ClassDef(AliTOFtracker, 1) // TOF tracker 
};

#endif