#ifndef __JACOUSTICS__JEVTTOOLKIT__
#define __JACOUSTICS__JEVTTOOLKIT__

#include <set>

#include "JAcoustics/JModel.hh"
#include "JAcoustics/JEvt.hh"


/**
 * \file
 *
 * Acoustic event fit toolkit.
 * \author mdejong
 */
namespace JACOUSTICS {}
namespace JPP { using namespace JACOUSTICS; }

namespace JACOUSTICS {

  /**
   * Get quality of fit.\n
   * The larger the quality, the better the fit.
   *
   * \param  chi2          chi2
   * \param  NDF           number of degrees of freedom
   * \return               quality
   */
  inline double getQuality(const double chi2, const int NDF)
  {
    return NDF  -  0.25 * chi2 / NDF;
  }


  /**
   * Get number of emitters.
   *
   * \param  __begin       begin of events
   * \param  __end         end   of events
   * \return               number of emitters
   */
  template<class T>
  inline size_t getNumberOfEmitters(T __begin, T __end)
  {
    std::set<int> buffer;

    for (T i = __begin; i != __end; ++i) {
      if (!i->empty()) {
	buffer.insert(i->getID());
      }
    }

    return buffer.size();
  }


  /**
   * Get model parameters of string.
   *
   * \param  fit           fit   parameters
   * \return               model parameters
   */
  inline JMODEL::JString getString(const JFit& fit)
  {
    return JMODEL::JString(fit.tx, fit.ty, fit.tx2, fit.ty2, fit.vs);
  }


  /**
   * Get fit parameters of string.
   *
   * \param  id            identifier
   * \param  string        model parameters
   * \return               fit   parameters
   */
  inline JFit getFit(const int id, const JMODEL::JString& string)
  {
    return JFit(id, string.tx, string.ty, string.tx2, string.ty2, string.vs);
  }


  /**
   * Auxiliary data structure to convert event to model.
   */
  struct getModel :
    public JModel
  {
    /**
     * Constructor.
     */
    template<class T>
    getModel(const T& object);
  };


  /**
   * Get model of detector.
   *
   * \param  evt           event
   */
  template<>
  inline
  getModel::getModel(const JEvt& evt)
  {
    for (JEvt::const_iterator i = evt.begin(); i != evt.end(); ++i) {
      this->string[i->id] = getString(*i);
    }
  }


  /**
   * Auxiliary data structure to convert model to event.
   */
  struct getEvt :
    public JEvt
  {
    /**
     * Constructor.
     *
     * \param  header        header
     * \param  model         model
     */
    getEvt(const JHead&  header,
	   const JModel& model) :
      JEvt(header)
    {
      for (JModel::string_type::const_iterator i = model.string.begin(); i != model.string.end(); ++i) {
	this->push_back(getFit(i->first, i->second));
      }
    }
  };
}

#endif