/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

//_________________________________________________________________________
// Class for reading data (AODs) in order to do prompt gamma
//  or other particle identification and correlations.
// This part is commented: Mixing analysis can be done, input AOD with events
// is opened in the AliCaloTrackReader::Init()
// 
//
//*-- Author: Gustavo Conesa (LNF-INFN) 
//////////////////////////////////////////////////////////////////////////////

//---- ANALYSIS system ----
#include "AliCaloTrackAODReader.h" 
#include "AliAODInputHandler.h"
#include "AliMultiEventInputHandler.h"
#include "AliAnalysisManager.h"
#include "AliMixedEvent.h"
#include "AliAODEvent.h"

ClassImp(AliCaloTrackAODReader)

//____________________________________________________________________________
AliCaloTrackAODReader::AliCaloTrackAODReader() : 
  AliCaloTrackReader(), fOrgInputEvent(0x0)
{
  //Default Ctor
  
  //Initialize parameters
  fDataType=kAOD;
  fReadStack          = kTRUE;
  fReadAODMCParticles = kFALSE;
 
}

//_________________________________________________________
AliCentrality* AliCaloTrackAODReader::GetCentrality() const 
{
  // recover centrality object.
  AliAODEvent* event    = dynamic_cast<AliAODEvent*> (fInputEvent);
  AliAODEvent* orgevent = dynamic_cast<AliAODEvent*> (fOrgInputEvent);
  
  if(event && !fSelectEmbeddedClusters) 
  {
    //Normal AOD event
    return event->GetHeader()->GetCentralityP() ;
  }
  else if(fSelectEmbeddedClusters && orgevent) 
  {
    // centrality in AOD from input, not in embedded event
    // temporary fix until this object is copied to the output event in embedding analysis
    return orgevent->GetHeader()->GetCentralityP();
  }
  else 
  {
    return 0x0 ; 
  }
}

//_________________________________________________________________
void AliCaloTrackAODReader::SetInputOutputMCEvent(AliVEvent* input, 
                                                  AliAODEvent* aod, 
                                                  AliMCEvent* mc) 
{
  // Connect the data pointers
  // If input is AOD, do analysis with input, if not, do analysis with the output aod.
  
  //printf("AODInputHandler %p, MergeEvents %d \n",aodIH, aodIH->GetMergeEvents());
  
  Bool_t tesd = kFALSE ; 
  Bool_t taod = kTRUE ; 
  if ( strcmp(input->GetName(), "AliMixedEvent") == 0 ) 
  {
    AliMultiEventInputHandler* multiEH = dynamic_cast<AliMultiEventInputHandler*>((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
    if(multiEH){
      if (multiEH->GetFormat() == 0 ) 
      {
        tesd = kTRUE ; 
      } else if (multiEH->GetFormat() == 1) 
      {
        taod = kTRUE ; 
      }
    }
    else
    {
      printf("AliCaloTrackAODReader::SetInputOutputMCEvent() - MultiEventHandler is NULL");
      abort();
    }
  }
  if        (strcmp(input->GetName(),"AliESDEvent") == 0) 
  {
    tesd = kTRUE ; 
  } else if (strcmp(input->GetName(),"AliAODEvent") == 0) 
  {
    taod = kTRUE ; 
  }
  
  
  if(tesd)   
  {
    SetInputEvent(aod);
    SetOutputEvent(aod);
    fOrgInputEvent = input;
  }
  else if(taod)
  {
    AliAODInputHandler* aodIH = dynamic_cast<AliAODInputHandler*>((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
    
	  if (aodIH && aodIH->GetMergeEvents()) 
    {
		  //Merged events, use output AOD.
		  SetInputEvent(aod);
		  SetOutputEvent(aod);
      fOrgInputEvent = input;
	  }
	  else
    {
		  SetInputEvent(input);
		  SetOutputEvent(aod);
	  }
  }
  else
  { 
    AliFatal(Form("AliCaloTrackAODReader::SetInputOutputMCEvent() - STOP : Wrong data format: %s\n",input->GetName()));
  }
  
  SetMC(mc);
  
}