#ifndef __JAANET__JEVTWEIGHTMISCELLANEOUS__
#define __JAANET__JEVTWEIGHTMISCELLANEOUS__

#include "km3net-dataformat/definitions/weightlist.hh"

#include "km3net-dataformat/offline/Head.hh"
#include "km3net-dataformat/offline/Evt.hh"

#include "JLang/JException.hh"
#include "JLang/JClonable.hh"

#include "JAAnet/JHead.hh"
#include "JAAnet/JHeadToolkit.hh"
#include "JAAnet/JEvtWeight.hh"
#include "JAAnet/JEvtWeightFactor.hh"
#include "JAAnet/JEvtWeightFactorHelper.hh"


/**
 * \author bjjung
 */

namespace JAANET {}
namespace JPP { using namespace JAANET; }

namespace JAANET {

  using JLANG::JClonable;
  
  
  /**
   * Implementation of event weighing for miscellaneous data\n
   * such as a merged offline file containing neutrinos and atmospheric muons.\n
   * A uniform weight of 1.0 is applied to all events.
   */
  struct JEvtWeightMiscellaneous:
    public JClonable<JEvtWeight, JEvtWeightMiscellaneous>,
    public JEvtWeightFactorHelper<JEvtWeightFactor>
  {
    /**
     * Default constructor.
     */
    JEvtWeightMiscellaneous() :
      JEvtWeightFactorHelper()
    {}

    
    /**
     * Constructor.
     *
     * \param  header            header
     */
    JEvtWeightMiscellaneous(const JHead& header) :
      JEvtWeightFactorHelper()
    {
      configure(header);
    } 
    
    
    /**
     * Constructor.
     *
     * \param  header            header
     * \param  factor            factor
     */
    JEvtWeightMiscellaneous(const JHead&            header,
			    const JEvtWeightFactor& factor) :
      JEvtWeightFactorHelper()
    {
      configure(header);
      JEvtWeightFactorHelper::configure(factor);
    }


    /**
     * Copy constructor.
     *
     * \param  object           original object
     */
    JEvtWeightMiscellaneous(const JEvtWeightMiscellaneous& object)
    {
      this->norm = object.norm;

      if (object.is_valid()) {
	JEvtWeightFactorHelper::configure(*(object.get()));
      }
    }

    
    /**
     * Configuration.
     *
     * \param  header            header
     */
    void configure(const JHead& header) override
    {
      using namespace JPP;
      
      if (check(header)) {

	norm = 1.0;

      } else {
	
        THROW(JValueOutOfRange, "JEvtWeightMiscellaneous::configure(): Provided header is inconsistent with a miscellaneous, merged offline file.");
      }
    }
    
    
    /**
     * Check whether header is consistent with this event weighter.
     *
     * \param  header            header
     * \return                   true if consistent; else false
     */
    bool check(const JHead& header) const override
    {
      return header.simul.empty() && !is_daq(header);
    }
    
    
    /**
     * Get weight of given event.
     *
     * \param  evt               event
     * \return                   weight [1/s]
     */
    double getWeight(const Evt& evt) const override
    {
      if (is_valid()) {
	
	return getFactor(evt) * getNormalisation(evt);
	
      } else if (evt.w.size() > WEIGHTLIST_RESCALED_EVENT_RATE) {

	return evt.w[WEIGHTLIST_RESCALED_EVENT_RATE];
	
      } else {
	
	return getNormalisation(evt);
      }
    }
  };
}

#endif