/********************************************************************************
 *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
 *                                                                              *
 *              This software is distributed under the terms of the             *
 *              GNU Lesser General Public Licence (LGPL) version 3,             *
 *                  copied verbatim in the file "LICENSE"                       *
 ********************************************************************************/
#ifndef CBMCHECKEVENTS_H
#define CBMCHECKEVENTS_H

#include "FairTask.h"

#include "CbmDefs.h"

#include "TString.h"
#include <vector>
#include "CbmTofDigi.h"

class CbmEvent;

class TClonesArray;
class TH1;
class TH2;
class TProfile;
class CbmDigiManager;

class CbmCheckEvents : public FairTask
{
  public:

    /** Default constructor **/
    CbmCheckEvents();

    CbmCheckEvents(const CbmCheckEvents&) = delete;
    CbmCheckEvents operator=(const CbmCheckEvents&) = delete;

    /** Constructor with parameters (Optional) **/
    //  CbmCheckEvents(Int_t verbose);


    /** Destructor **/
    ~CbmCheckEvents();


    /** Initialization of task at the beginning of a run **/
    virtual InitStatus Init();

    /** ReInitiliazation of task when the runID changes **/
    virtual InitStatus ReInit();


    /** Executed for each event. **/
    virtual void Exec(Option_t*);

    /** Load the parameter container from the runtime database **/
    virtual void SetParContainers();

    /** Finish task called at the end of the run **/
    virtual void Finish();

  private:
    void CreateHistos();
    void AnalyseEvent(CbmEvent* event);

    void GetTimeDiffT0(CbmEvent*, TH1*, TH1*);

    template <class Digi> void GetTimeDiff(CbmEvent* event, TH1*, TH1*, ECbmDataType type);

    CbmDigiManager* fDigiMan = nullptr;  //! Interface to digi data
    /** T0 is not included in CbmDigiManager, so add it explicitly here **/
    const std::vector<CbmTofDigi>* fT0DigiVec = nullptr; //!
    TClonesArray* fT0DigiArr{nullptr};  //!
    TClonesArray* fEvents{nullptr};

    // Variables to store the previous digi time
    Double_t fPrevEventTime{0.};

    //
    Int_t fNrTs{0};

    // Histograms
    TH1* fEventSize = nullptr;
    TH1* fEventLength = nullptr;
    TH1* fEventsPerTS = nullptr;
    TH1* fT0InEvent = nullptr;
    TH1* fStsInEvent = nullptr;
    TH1* fMuchInEvent = nullptr;
    TH1* fTofInEvent = nullptr;

    TH1* fT0DeltaT = nullptr;
    TH1* fStsDeltaT = nullptr;
    TH1* fMuchDeltaT = nullptr;
    TH1* fTofDeltaT = nullptr;

    TH2* fEventsvsTS = nullptr;
    TProfile* fLengthvsTS = nullptr;
    
    ClassDef(CbmCheckEvents,1);
};

#endif