#ifndef __JAANET__JEVTWEIGHTDAQ__
#define __JAANET__JEVTWEIGHTDAQ__

#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"

/**
 * \author mdejong
 */

namespace JAANET {

  using JLANG::JClonable;
  using JLANG::JValueOutOfRange;
  
  
  /**
   * Implementation of event weighing for DAQ data.
   */
  struct JEvtWeightDAQ:
    public JClonable<JEvtWeight, JEvtWeightDAQ>
  {
    /**
     * Default constructor.
     */
    JEvtWeightDAQ()
    {}
    
    
    /**
     * Constructor.
     *
     * \param  header            header
     */
    JEvtWeightDAQ(const JHead& header)
    {
      configure(header);
    }

    
    /**
     * Configuration.
     *
     * \param  header            header
     * \return                   true if okay; else false
     */
    void configure(const JHead& header) override
    {
      if (check(header) && header.DAQ.livetime_s > 0.0) {

	norm = 1.0 / header.DAQ.livetime_s;

      } else {
	
        THROW(JValueOutOfRange, "JEvtWeightDAQ::configure(): Provided header is inconsistent with a DAQ-header.");
      }
    }


    /**
     * 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 is_daq(header);
    }

    
    /**
     * Get weight of given event.
     *
     * \param  evt               event
     * \return                   weight [1/s]
     */
    double getWeight(const Evt& evt) const override
    {
      return norm;
    }
  };
}

#endif