//FJSTARTHEADER
// $Id: ClusterSequencePassiveArea.hh 4354 2018-04-22 07:12:37Z salam $
//
// Copyright (c) 2005-2018, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
//
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// This file is part of FastJet.
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//  FastJet is free software; you can redistribute it and/or modify
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//FJENDHEADER

#ifndef __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__
#define __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__


#include "fastjet/PseudoJet.hh"
#include "fastjet/ClusterSequence1GhostPassiveArea.hh"
#include<iostream>
#include<vector>

FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh

//using namespace std;

/// @ingroup sec_area_classes
/// \class ClusterSequencePassiveArea
/// Like ClusterSequence with computation of the passive jet area
///
/// Class that behaves essentially like ClusterSequence except
/// that it also provides access to the area of a jet (which
/// will be a random quantity... Figure out what to do about seeds 
/// later...)
///
/// This class should not be used directly. Rather use
/// ClusterSequenceArea with the appropriate AreaDefinition
class ClusterSequencePassiveArea : public ClusterSequence1GhostPassiveArea {
public:

  /// constructor based on JetDefinition and PassiveAreaSpec
  template<class L> ClusterSequencePassiveArea
         (const std::vector<L> & pseudojets, 
	  const JetDefinition & jet_def_in,
	  const GhostedAreaSpec & area_spec,
	  const bool & writeout_combinations = false) ;

  /// return an empty area that's appropriate to the passive area
  /// determination carried out
  virtual double empty_area(const Selector & selector) const FASTJET_OVERRIDE;

private:

  /// does the initialisation and running specific to the passive
  /// areas class
  void _initialise_and_run_PA (const JetDefinition & jet_def_in,
                               const GhostedAreaSpec & area_spec,
                               const bool & writeout_combinations = false);

};




template<class L> ClusterSequencePassiveArea::ClusterSequencePassiveArea 
(const std::vector<L> & pseudojets, 
 const JetDefinition & jet_def_in,
 const GhostedAreaSpec & area_spec,
 const bool & writeout_combinations) {

  // transfer the initial jets (type L) into our own array
  _transfer_input_jets(pseudojets);

  // run the clustering for passive areas
  _initialise_and_run_PA(jet_def_in, area_spec, writeout_combinations);

}


  
FASTJET_END_NAMESPACE

#endif // __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__
