#ifndef DCHDETECTOR_H
#define DCHDETECTOR_H

#include "TClonesArray.h"
#include "TLorentzVector.h"
#include "CbmDetector.h"

using namespace std;


class TClonesArray;
class DchPoint;
//class CbmVolume; 



class DchDetector : public CbmDetector 
{

 public:

  /** Default constructor **/
  DchDetector();


  /** Standard constructor.
   *@param name    detetcor name
   *@param active  sensitivity flag
   **/
  DchDetector(const char* name, Bool_t active);


  /** Destructor **/
  virtual ~DchDetector();

  /** Virtual method ProcessHits
   ** Defines the action to be taken when a step is inside the
   ** active volume. Creates DchPoints and adds 
   ** them to the collections.
   *@param vol  Pointer to the active volume
   **/
  virtual Bool_t ProcessHits(CbmVolume* vol = 0);


  /** Virtual method EndOfEvent
   **
   ** If verbosity level is set, print hit collection at the
   ** end of the event and resets it afterwards.
   **/
  virtual void EndOfEvent();

  /** Virtual method Register
   **
   ** Registers the hit collection in the ROOT manager.
   **/
  virtual void Register();


  /** Accessor to the hit collection **/
  virtual TClonesArray* GetCollection(Int_t iColl) const;


  /** Virtual method Print
   **
   ** Screen output of hit collection.
   **/
  virtual void Print() const;    


  /** Virtual method Reset
   **
   ** Clears the hit collection
   **/
  virtual void Reset();


  /** Virtual method Construct geometry
   **
   **/
  virtual void ConstructGeometry();

  
  DchPoint* AddHit(Int_t trackID, Int_t detID,  Int_t moduleID, 
		      TVector3 posIn, TVector3 posOut, 
		      TVector3 momIn, TVector3 momOut, 
		      Double_t time, Double_t length, Double_t eLoss, 
		      TString nam,Int_t evt);




 private:

  Int_t          fTrackID;           //!  track index
  Int_t          fVolumeID;          //!  volume id (copy no)
  Int_t          fModuleID;          //!  module id
  TLorentzVector fPosIn, fPosOut;    //!  position
  TLorentzVector fMomIn, fMomOut;    //!  momentum
  Double32_t     fTime;              //!  time
  Double32_t     fLength;            //!  length
  Double32_t     fELoss;             //!  energy loss
  Int_t fPosIndex;      //! 
  Int_t volDetector;    //!  MC volume ID of DCH
  
  TString fcurrnam;
  TString fcurrnam2;

  TClonesArray* fDchPointCollection;        //! Point collection
  Int_t fevent;
  // reset all parameters   
  void ResetParameters();

  ClassDef(DchDetector,1)

}; 

inline void DchDetector::ResetParameters() {
  fTrackID = -999; 
  fVolumeID = -999; 
  fModuleID = -999;
  fPosIn.SetXYZT(-999., -999., -999., -999.);
  fPosOut.SetXYZT(-999., -999., -999., -999.) ;
  fMomIn.SetXYZT(-999., -999., -999., -999.) ;
  fMomOut.SetXYZT(-999., -999., -999., -999.);
  fTime = -999;  
  fLength = 0.;
  fELoss = 0.; 
}



#endif