/* $Id$ */

#ifndef AlidNdEtaTask_H
#define AlidNdEtaTask_H

#include "AliAnalysisTask.h"
#include "AliPWG0Helper.h"
#include "AliTriggerAnalysis.h"
#include <TString.h>

class AliESDtrackCuts;
class dNdEtaAnalysis;
class TH1F;
class TH2F;
class TH3F;
class AliESDEvent;
class TGraph;

class AlidNdEtaTask : public AliAnalysisTask {
  public:
    AlidNdEtaTask(const char* opt = "");
    virtual ~AlidNdEtaTask();

    virtual void   ConnectInputData(Option_t *);
    virtual void   CreateOutputObjects();
    virtual void   Exec(Option_t*);
    virtual void   Terminate(Option_t*);
    virtual Bool_t   Notify();

    void SetTrackCuts(AliESDtrackCuts* cuts) { fEsdTrackCuts = cuts; }
    void SetAnalysisMode(AliPWG0Helper::AnalysisMode mode) { fAnalysisMode = mode; }
    void SetReadMC(Bool_t flag = kTRUE) { fReadMC = flag; }
    void SetUseMCVertex(Bool_t flag = kTRUE) { fUseMCVertex = flag; }
    void SetOnlyPrimaries(Bool_t flag = kTRUE) { fOnlyPrimaries = flag; }
    void SetUseMCKine(Bool_t flag = kTRUE) { fUseMCKine = flag; }
    void SetTrigger(AliTriggerAnalysis::Trigger trigger) { fTrigger = trigger; }
    void SetFillPhi(Bool_t flag = kTRUE) { fFillPhi = flag; }
    void SetDeltaPhiCut(Float_t cut) { fDeltaPhiCut = cut; }
    
    void SetOption(const char* opt) { fOption = opt; }

 protected:
    AliESDEvent *fESD;    //! ESD object
    TList* fOutput;                  //! list send on output slot 0

    TString fOption;      // option string
    AliPWG0Helper::AnalysisMode fAnalysisMode; // detector that is used for analysis
    AliTriggerAnalysis::Trigger fTrigger;      // trigger that is used
    Bool_t fFillPhi;                           // if true phi is filled as 3rd coordinate in all maps
    Float_t fDeltaPhiCut;                      // cut in delta phi (only SPD)

    Bool_t  fReadMC;       // if true reads MC data (to build correlation maps)
    Bool_t  fUseMCVertex;  // the MC vtx is used instead of the ESD vertex (for syst. check)
    Bool_t  fOnlyPrimaries;// Process only primaries by using the MC information (for syst. check)
    Bool_t  fUseMCKine;    // use the MC values for each found track/tracklet (for syst. check)

    AliESDtrackCuts* fEsdTrackCuts;         // Object containing the parameters of the esd track cuts

    // Gathered from ESD
    dNdEtaAnalysis* fdNdEtaAnalysisESD;     //! contains the dndeta from the ESD
    // control hists
    TH1F* fMult;                            //! raw multiplicity histogram (control histogram)
    TH1F* fMultVtx;                            //! raw multiplicity histogram of evts with vtx (control histogram)
    TH1F* fPartEta[3];            //! counted particles as function of eta (full vertex range, below 0 range, above 0 range)
    TH1F* fEvents;                //! events counted as function of vtx
    TH1F* fVertexResolution;      //! z resolution of the vertex

    // Gathered from MC (when fReadMC is set)
    dNdEtaAnalysis* fdNdEtaAnalysis;        //! contains the dndeta from the full sample
    dNdEtaAnalysis* fdNdEtaAnalysisND;      //! contains the dndeta for the ND sample
    dNdEtaAnalysis* fdNdEtaAnalysisNSD;     //! contains the dndeta for the NSD sample
    dNdEtaAnalysis* fdNdEtaAnalysisTr;      //! contains the dndeta from the triggered events
    dNdEtaAnalysis* fdNdEtaAnalysisTrVtx;   //! contains the dndeta from the triggered events with vertex
    dNdEtaAnalysis* fdNdEtaAnalysisTracks;  //! contains the dndeta from the triggered events with vertex counted from the mc particles associated to the tracks (comparing this to the raw values from the esd shows the effect of the detector resolution)

    // control histograms (MC)
    TH1F* fPartPt;                //! counted particles as function of pt

    // control histograms (ESD)
    TH3F* fVertex;                //! 3d vertex distribution
    TH1F* fPhi;                   //! raw phi distribution
    TH1F* fRawPt;                 //! raw pt distribution
    TH2F* fEtaPhi;                //! raw eta - phi distribution
    TH2F* fZPhi[2];               //! raw z - phi distribution from tracklets per layer (only SPD)
    TH1F* fDeltaPhi;              //! histogram of delta_phi values for tracklets (only for SPD analysis)
    TH1F* fDeltaTheta;            //! histogram of delta_theta values for tracklets (only for SPD analysis)
    TH2F* fFiredChips;            //! fired chips l1+l2 vs. number of tracklets (only for SPD analysis)
    TGraph* fTriggerVsTime;       //! trigger as function of event time
    TH1F* fStats;                 //! further statistics : bin 1 = vertexer 3d, bin 2 = vertexer z

 private:
    AlidNdEtaTask(const AlidNdEtaTask&);
    AlidNdEtaTask& operator=(const AlidNdEtaTask&);

  ClassDef(AlidNdEtaTask, 1);
};

#endif