//-----------------------------------------------------------
// File and Version Information:
// $Id$
//
// Description:
//     Reader for t2k data for the gemTPCdecoding program
//
//
// Environment:
//      Software developed for the PANDA Detector at FAIR.
//
// Author List:
//      Maxence Vandenbroucke    TUM            (original author)
//      Felix Boehmer            TUM  
//
//-----------------------------------------------------------


// Panda Headers ----------------------

// This Class' Header ------------------
#include "TpcDataReaderTaskAlice.h"

// C/C++ Headers ----------------------
#include <vector>
#include <map>

// Collaborating Class Headers --------
#include "FairRootManager.h"
#include "TClonesArray.h"
#include "TVector3.h"
#include "TpcDigiMapper.h"
#include "TpcDigiPar.h"
#include "TH1.h"
#include "TFile.h"

#include "FairRunAna.h"
#include "FairRuntimeDb.h"
 

// Class Member definitions -----------

ClassImp(TpcDataReaderTaskAlice)


TpcDataReaderTaskAlice::TpcDataReaderTaskAlice()
: fPersistence(kFALSE), fLoop(0), fAliceEvent(NULL),fEv(NULL)
{
  fSampleBranchName = "TpcSample";
  fAliceEvBranchName = "AliceEvent";
  fFile = "TBtest/run.root";
}

TpcDataReaderTaskAlice::~TpcDataReaderTaskAlice()
{;}

InitStatus
TpcDataReaderTaskAlice::Init()
{
  //Get ROOT Manager
  FairRootManager* ioman= FairRootManager::Instance();
  
  if(ioman==0)
    {
      Error("TpcDataReaderTaskAlice::Init","RootManager not instantiated!");
      return kERROR;
    }
  
  // Get input data
  FairRun* run = FairRun::Instance();
  if ( ! run ) Fatal("SetParContainers", "No analysis run");

  FairRuntimeDb* db = run->GetRuntimeDb();
  if ( ! db ) Fatal("SetParContainers", "No runtime database");

  TpcDigiPar* fpar= (TpcDigiPar*) db->getContainer("TpcDigiPar");
  if (! fpar ) Fatal("SetParContainers", "TpcDigiPar not found");
  //fPadplane= fPar->getPadPlane();
 
  fIntree = new TChain("TpcTree");
  fIntree->Add(fFile.Data());//before AddFile
  fIntree->SetBranchAddress("tpcEvent", &fEv);
  fIntree->SetBranchAddress("GEMEvent", &fAliceEvent);
  TFile* hfile = new TFile(fFile.Data());

  if(fIntree->IsZombie()) {
    std::cout << "TpcDataReaderTaskAlice::Init data file/tree "<< fFile
	      << " couldn't be loaded -> abort" <<std::endl;
    Error("TpcDataReaderTaskAlice::Init","Data file not found");
    return kERROR;
  }

  if (fVerbose)
    std::cout<<"Number of Entries in Chain: "<<fIntree->GetEntries()<< std::endl;
  
  // create and register output array
  fSampleOutArray = new TClonesArray("TpcSample");
  fAliceEventOutArray = new TClonesArray("GEMEvent");
  ioman->Register("TpcSample","Tpc",fSampleOutArray,fPersistence);
  ioman->Register("GEMEvent","Tpc", fAliceEventOutArray, fPersistence);
  return kSUCCESS;
}

//EXEC
void TpcDataReaderTaskAlice::Exec(Option_t* opt)
{
  if (fVerbose) std::cout << "TpcDataReaderTaskAlice::Exec" << std::endl;
  
  // Reset output Arrays
  if(fSampleOutArray==0) 
    Fatal("TpcDataReaderTaskAlice::Exec()","No SampleOutArray");
  
  fSampleOutArray->Delete();
  fAliceEventOutArray->Delete();
  
  const std::vector<TpcSample>* samples;

  
  while(fLoop<fIntree->GetEntries()) {
    //get the TpcEvent;    
    fIntree->GetEvent(fLoop);
    fLoop++;
    samples = fEv->getEventVector();
    if (fVerbose)
      std :: cout << "Copying "<< samples->size()<<" samples." <<std::endl; 
    

    GEMEvent* id = new((*fAliceEventOutArray)[0]) GEMEvent(*fAliceEvent);
    if (fVerbose)
      std :: cout << "Saving "<< samples->size()<<" samples" <<std::endl;  

    for(unsigned int i=0; i<samples->size(); i++){
        TpcSample* s=new ((*fSampleOutArray)[i]) TpcSample((*samples)[i]);
        s->setIndex(i);
    }
        
    return;
  }
  return;
}
	


void
TpcDataReaderTaskAlice::SetParContainers() {
  
  std::cout<<"TpcDataReaderTaskAlice::SetParContainers"<<std::endl;
  std::cout.flush();
  
  // Get run and runtime database
  FairRun* run = FairRun::Instance();
  if ( ! run ) Fatal("SetParContainers", "No analysis run");
  
  FairRuntimeDb* db = run->GetRuntimeDb();
  if ( ! db ) Fatal("SetParContainers", "No runtime database");
  
  // Get Tpc digitisation parameter container
  fPar= (TpcDigiPar*) db->getContainer("TpcDigiPar");
  if (! fPar ) Fatal("SetParContainers", "TpcDigiPar not found");
}