/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/SimGeneral/DataMixingModule/plugins/DataMixingSiStripWorker.cc

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// File: DataMixingSiStripWorker.cc
// Description:  see DataMixingSiStripWorker.h
// Author:  Mike Hildreth, University of Notre Dame
//
//--------------------------------------------

#include <map>
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Framework/interface/ConstProductRegistry.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/Provenance/interface/Provenance.h"
#include "DataFormats/Provenance/interface/BranchDescription.h"
//
//
#include "DataMixingSiStripWorker.h"

using namespace std;

namespace edm
{

  // Virtual constructor

  DataMixingSiStripWorker::DataMixingSiStripWorker() { }

  // Constructor 
  DataMixingSiStripWorker::DataMixingSiStripWorker(const edm::ParameterSet& ps) : 
                                                            label_(ps.getParameter<std::string>("Label"))

  {                                                         

    // get the subdetector names
    //    this->getSubdetectorNames();  //something like this may be useful to check what we are supposed to do...

    // declare the products to produce

    SistripLabelSig_   = ps.getParameter<edm::InputTag>("SistripLabelSig");
    SiStripPileInputTag_ = ps.getParameter<edm::InputTag>("SiStripPileInputTag");

    SiStripDigiCollectionDM_  = ps.getParameter<std::string>("SiStripDigiCollectionDM");

    // clear local storage for this event                                                                     
    SiHitStorage_.clear();

  }
               

  // Virtual destructor needed.
  DataMixingSiStripWorker::~DataMixingSiStripWorker() { 
  }  



  void DataMixingSiStripWorker::addSiStripSignals(const edm::Event &e) { 
    // fill in maps of hits

    Handle< edm::DetSetVector<SiStripDigi> >  input;

    if( e.getByLabel(SistripLabelSig_,input) ) {
      OneDetectorMap LocalMap;

      //loop on all detsets (detectorIDs) inside the input collection
      edm::DetSetVector<SiStripDigi>::const_iterator DSViter=input->begin();
      for (; DSViter!=input->end();DSViter++){

#ifdef DEBUG
        LogDebug("DataMixingSiStripWorker")  << "Processing DetID " << DSViter->id;
#endif

        LocalMap.clear();
        LocalMap.reserve((DSViter->data).size());
        LocalMap.insert(LocalMap.end(),(DSViter->data).begin(),(DSViter->data).end());  
        
        SiHitStorage_.insert( SiGlobalIndex::value_type( DSViter->id, LocalMap ) );
      }
 
    }
  } // end of addSiStripSignals



  void DataMixingSiStripWorker::addSiStripPileups(const int bcr, const EventPrincipal *ep, unsigned int eventNr) {
    LogDebug("DataMixingSiStripWorker") <<"\n===============> adding pileups from event  "<<ep->id()<<" for bunchcrossing "<<bcr;

    // fill in maps of hits; same code as addSignals, except now applied to the pileup events

    boost::shared_ptr<Wrapper<edm::DetSetVector<SiStripDigi> >  const> inputPTR =
      getProductByTag<edm::DetSetVector<SiStripDigi> >(*ep, SiStripPileInputTag_ );

    if(inputPTR ) {

      const edm::DetSetVector<SiStripDigi>  *input = const_cast< edm::DetSetVector<SiStripDigi> * >(inputPTR->product());

      // Handle< edm::DetSetVector<SiStripDigi> >  input;

      // if( e->getByLabel(Sistripdigi_collectionPile_.label(),SistripLabelPile_.label(),input) ) {

      OneDetectorMap LocalMap;

      //loop on all detsets (detectorIDs) inside the input collection
      edm::DetSetVector<SiStripDigi>::const_iterator DSViter=input->begin();
      for (; DSViter!=input->end();DSViter++){

#ifdef DEBUG
        LogDebug("DataMixingSiStripWorker")  << "Pileups: Processing DetID " << DSViter->id;
#endif

        // find correct local map (or new one) for this detector ID

        SiGlobalIndex::const_iterator itest;

        itest = SiHitStorage_.find(DSViter->id);

        if(itest!=SiHitStorage_.end()) {  // this detID already has hits, add to existing map

          LocalMap = itest->second;

          // fill in local map with extra channels
          LocalMap.insert(LocalMap.end(),(DSViter->data).begin(),(DSViter->data).end());
          std::stable_sort(LocalMap.begin(),LocalMap.end(),DataMixingSiStripWorker::StrictWeakOrdering());
          SiHitStorage_[DSViter->id]=LocalMap;
          
        }
        else{ // fill local storage with this information, put in global collection

          LocalMap.clear();
          LocalMap.reserve((DSViter->data).size());
          LocalMap.insert(LocalMap.end(),(DSViter->data).begin(),(DSViter->data).end());

          SiHitStorage_.insert( SiGlobalIndex::value_type( DSViter->id, LocalMap ) );
        }
      }
    }
  }


 
  void DataMixingSiStripWorker::putSiStrip(edm::Event &e) {

    // collection of Digis to put in the event
    std::vector< edm::DetSet<SiStripDigi> > vSiStripDigi;

    // loop through our collection of detectors, merging hits and putting new ones in the output

    // big loop over Detector IDs:

    for(SiGlobalIndex::const_iterator IDet = SiHitStorage_.begin();
        IDet != SiHitStorage_.end(); IDet++) {

      edm::DetSet<SiStripDigi> SSD(IDet->first); // Make empty collection with this detector ID
        
      OneDetectorMap LocalMap = IDet->second;

      //counter variables
      int formerStrip = -1;
      int currentStrip;
      int ADCSum = 0;

      OneDetectorMap::const_iterator iLocalchk;
      OneDetectorMap::const_iterator iLocal  = LocalMap.begin();
      for(;iLocal != LocalMap.end(); ++iLocal) {

        currentStrip = iLocal->strip(); 

        if (currentStrip == formerStrip) { // we have to add these digis together
          ADCSum+=iLocal->adc();          // on every element...
        }
        else{
          if(formerStrip!=-1){
            if (ADCSum > 511) ADCSum = 255;
            else if (ADCSum > 253 && ADCSum < 512) ADCSum = 254;
            SiStripDigi aHit(formerStrip, ADCSum);
            SSD.push_back( aHit );        
          }
          // save pointers for next iteration
          formerStrip = currentStrip;
          ADCSum = iLocal->adc();
        }

        iLocalchk = iLocal;
        if((++iLocalchk) == LocalMap.end()) {  //make sure not to lose the last one
          if (ADCSum > 511) ADCSum = 255;
          else if (ADCSum > 253 && ADCSum < 512) ADCSum = 254;
          SSD.push_back( SiStripDigi(formerStrip, ADCSum) );      
        } // end of loop over one detector
        
      }
      // stick this into the global vector of detector info
      vSiStripDigi.push_back(SSD);

    } // end of big loop over all detector IDs

    // put the collection of digis in the event   
    LogInfo("DataMixingSiStripWorker") << "total # Merged strips: " << vSiStripDigi.size() ;

    // make new digi collection
    
    std::auto_ptr< edm::DetSetVector<SiStripDigi> > MySiStripDigis(new edm::DetSetVector<SiStripDigi>(vSiStripDigi) );

    // put collection

    e.put( MySiStripDigis, SiStripDigiCollectionDM_ );

    // clear local storage for this event
    SiHitStorage_.clear();
  }

} //edm