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

/* $Id$ */

////////////////////////////////////////////////
//  Manager class for TPC                     //
////////////////////////////////////////////////
#include "AliDetector.h"
#include "AliHit.h" 
#include "AliDigit.h" 
#include <TMatrix.h>
#include <TTree.h>
#include <TClonesArray.h>

class TFile;

class AliTPCParam;

class AliTPCDigitsArray;
class AliTPCClustersArray;

class AliTPC : public AliDetector {
protected:
  Int_t          fSens;             // ISENS
  Int_t          fSecAL;            // Upper sector selector
  Int_t          fSecAU;            // Lower sector selector
  Int_t          fSecLows[6];       // List of lower sectors selected
  Int_t          fSecUps[12];       // List of upper sectors selected
  Int_t          fNsectors;         // Number of sectors in TPC
  //MI changes
  AliTPCDigitsArray * fDigitsArray;              //detector digit object  
  AliTPCClustersArray * fClustersArray; //detector cluster object
  AliTPCParam *fTPCParam;

  //MK changes

  Float_t        fSide;  // selects left(-1), right(+1), or both(0) sides of the TPC
  Int_t          fNoComp; // number of a drift gas components
  Int_t          fMixtComp[3]; // drift gas components
  Float_t        fMixtProp[3]; // mixture proportions

public:
  AliTPC();
  AliTPC(const char *name, const char *title);
  virtual      ~AliTPC();
  virtual void  AddHit(Int_t a1, Int_t *a2, Float_t *a3);
  Int_t         DistancetoPrimitive(Int_t px, Int_t py);
  virtual void  BuildGeometry();
  virtual void  CreateGeometry() {}
  virtual void  CreateMaterials();
  virtual void  Hits2Clusters(TFile *of);
  virtual void  Hits2ExactClustersSector(Int_t isec); // MI change calculate "exact" cluster position

  virtual void  Hits2Digits();   //MI change
  virtual void Hits2DigitsSector(Int_t isec);  //MI change
  virtual void  Init();
  virtual Int_t IsVersion() const =0;
  virtual void  Digits2Clusters(TFile *of);
  virtual void  Clusters2Tracks(TFile *of);

  Int_t         GetNsectors()       {return fNsectors;}
  virtual void  MakeBranch(Option_t *opt=" ");
  virtual void  ResetDigits();
  virtual void  SetSecAL(Int_t sec);
  virtual void  SetSecAU(Int_t sec);
  virtual void  SetSecLows(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6);
  virtual void  SetSecUps (Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6,
			   Int_t s7,Int_t s8,Int_t s9,Int_t s10, Int_t s11, Int_t s12);
  virtual void  SetSens(Int_t sens);

  //MK changes

  //MK changes

  virtual void  SetSide(Float_t side);
  virtual void  SetGasMixt(Int_t nc,Int_t c1,Int_t c2,Int_t c3,Float_t p1,
                           Float_t p2,Float_t p3); 

  virtual void  StepManager()=0;
  virtual void  DrawDetector() {}
  AliTPCDigitsArray*  GetDigitsArray() {return fDigitsArray;} //MI change
  AliTPCClustersArray* GetClustersArray(){return fClustersArray;} //MI change
  AliTPCParam *GetParam(){return fTPCParam;} // M.K, M.I changes
  void SetParam(AliTPCParam *param){fTPCParam=param;} // M.K, M.I changes
  void SetDigitsArray(AliTPCDigitsArray* param) {fDigitsArray=param;}  //MI change
  void SetClustersArray(AliTPCClustersArray *clusters) {fClustersArray = clusters;} //MI change
private:
  //
  void DigitizeRow(Int_t irow,Int_t isec,TObjArray **rowTriplet);
  Float_t GetSignal(TObjArray *p1, Int_t ntr, TMatrix *m1, TMatrix *m2,
                    Int_t *IndexRange);
  void GetList (Float_t label,Int_t np,TMatrix *m,Int_t *IndexRange,
                Float_t **pList);
  void MakeSector(Int_t isec,Int_t nrows,TTree *TH,Stat_t ntracks,TObjArray **row);
  void TransportElectron(Float_t *xyz, Int_t *index);
  Int_t fCurrentIndex[4];// index[0] indicates coordinate system, 
                         // index[1] sector number, 
                         // index[2] pad row number  
                         // index[3] pad row number for which signal is calculated
  
  ClassDef(AliTPC,2)  // Time Projection Chamber class
};


//_____________________________________________________________________________

class AliTPCdigit : public AliDigit {
public:
   Int_t     fSector;     //array of volumes
   Int_t     fPadRow;     //Row number
   Int_t     fPad ;       //Pad number
   Int_t     fTime;       //Time bucket
   Int_t     fSignal;     //Signal amplitude
 
public:
   AliTPCdigit() {}
   AliTPCdigit(Int_t *tracks, Int_t *digits);
   virtual ~AliTPCdigit() {}
 
   ClassDef(AliTPCdigit,1)  // Time Projection Chamber digits
};
 
 
//_____________________________________________________________________________
 
class AliTPChit : public AliHit {
public:
   Int_t     fSector;     //sector number
   Int_t     fPadRow;     //Pad Row number
   Float_t   fQ ;         //charge
 
public:
   AliTPChit() {}
   AliTPChit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits);
   virtual ~AliTPChit() {}
 
   ClassDef(AliTPChit,1)  // Time Projection Chamber hits
};

#endif