///////////////////////////////////////////////////////////////////
//
// Conditional processor based on time coincidences.
// Finds a Prompt event candidate, defined by NhitCleaned within a given interval
// Finds the Delayed event candidates, defined by NhitCleaned in another interval
// and with triggerTime within a given time interval from the Prompt candidate triggerTime
// Will mark the Prompt, Delayed or Both for OKTRUE
//
// Author: Sofia Andringa <sofia@lip.pt>
// Revision History: 2018-03-30 - first version
///////////////////////////////////////////////////////////////////

#ifndef __RAT_CoincProc__
#define __RAT_CoincProc__

#include <RAT/Processor.hh>

#include <string>

namespace RAT
{

class CoincProc : public Processor
{
public:
  // Create new count processor.
  //
  // Default is for conditional to return OKTRUE if within 500 micro-seconds event.
  CoincProc();

  // Destroy count processor.
  virtual ~CoincProc();

  // Applies the number command
  //
  // param: should be "TWindow" (in micro-seconds)
  // value: should be the conditional interval to check
  // Throws ParamUnknown if param is not number
  // Throws ParamInvalid if value is not >0
  virtual void SetI( const std::string& param, const int value );
  virtual void SetD( const std::string& param, const double value );

  // Called for each event
  //
  // Increment event counters, check if counter is equal to "number" interval.
  //
  // run: run information to process
  // ds: entry information to process
  // Returns as OKTRUE if counter is equal to interval, OKFALSE otherwise
  virtual Processor::Result DSEvent( DS::Run& run, DS::Entry& ds );

protected:
  //internal variable
  double fTimeStart;  // Start time of current window - internal variable

  //parameters
  double fTimeWindow; // Upper duration of coincident window
  double fLowWindow; // Lower duration of coincidence window - to veto retriggers
  size_t fNhitFirst; // min Nhit threshold for first (Prompt) event in coincidence
  size_t fNhitSecond; // min Nhit threshold for second (Delayed) event in coincidence
  size_t fNhitFirstMax; // max Nhit cut for first (Prompt) event in coincidence
  size_t fNhitSecondMax; // max Nhit cut for second (Delayed) event in coincidence

  // for reference
  //int fNCoincFound; // Just counting, for reference
  //int fNfirstFound; // Just counting, for reference
  //int fNsecondFound; // Just counting, for reference


  int fMode; // return TRUE for (1) events passing the Prompt cuts, no coincidence selection (2) Delayed events in coincidence with prompt (3) Prompt and Delayed candidated
};

} // namespace RAT

#endif