#ifndef __JTRIGGER__JBUILDHELPER__
#define __JTRIGGER__JBUILDHELPER__

#include "km3net-dataformat/online/JDAQSuperFrame.hh"
#include "km3net-dataformat/online/JDAQTimeslice.hh"
#include "km3net-dataformat/online/JDAQEvent.hh"
#include "JDetector/JModule.hh"
#include "JDetector/JModuleRouter.hh"


/**
 * \author mdejong
 */

namespace JTRIGGER {}
namespace JPP { using namespace JTRIGGER; }

namespace JTRIGGER {

  using KM3NETDAQ::JDAQSuperFrame;
  using KM3NETDAQ::JDAQTimeslice;
  using KM3NETDAQ::JDAQEvent;
  using JDETECTOR::JModule;
  using JDETECTOR::JModuleRouter;


  /**
   * Auxiliary class to extend hit building functionality to all DAQ data types.\n
   * The implementation of this functionality is based on a static cast of 
   * the given template parameter (known as "curiously recurring template pattern").\n
   * The template parameter should refer to a class which provides for 
   * an implementation of the following operator:
   * <pre>
   *      template<class JOutput_t>
   *      void operator()(const JDAQSuperFrame& super_frame,
   *                      const JModule&        module,
   *                      JOutput_t             out) const
   * </pre>
   * where <tt>out</tt> refers to an STL compatible output iterator.\n
   * The data type of the <tt>JBuild_t</tt> class corresponds to
   * the pointed-to element of the output iterator.
   */
  template<class JBuild_t>
  struct JBuildHelper
  {
    /**
     * Build hits from uncalibrated DAQ data.
     *
     * The time calibration is applied.
     * Note that the output data are not time sorted.
     *
     * \param  timeslice      DAQ time slice
     * \param  router         module router
     * \param  out            output data
     */
    template<class JOutput_t>
    void operator()(const JDAQTimeslice& timeslice,
		    const JModuleRouter& router,
		    JOutput_t            out) const
    {
      for (JDAQTimeslice::const_iterator i = timeslice.begin(); i != timeslice.end(); ++i) {
	if (router.hasModule(i->getModuleID())) {
	  static_cast<const JBuild_t&>(*this)(*i, router.getModule(i->getModuleID()), out);
	}
      }
    }


    /**
     * Build hits from uncalibrated DAQ data.
     *
     * The time calibration is applied.
     * Note that the output data are not time sorted.
     *
     * \param  event          DAQ event
     * \param  router         module router
     * \param  snapshot       use shapshot hits (else use triggered hits)
     * \param  out            output data
     */
    template<class JOutput_t>
    void operator()(const JDAQEvent&     event,
		    const JModuleRouter& router,
		    const bool           snapshot,
		    JOutput_t            out) const
    {
      static_cast<const JBuild_t&>(*this)(JDAQTimeslice(event, snapshot), router, out);
    }


    /**
     * Build hits from uncalibrated DAQ data.
     *
     * The snapshot data of the DAQ event are used.
     * The time calibration is applied.
     * Note that the output data are not time sorted.
     *
     * \param  event          DAQ event
     * \param  router         module router
     * \param  out            output data
     */
    template<class JOutput_t>
    void operator()(const JDAQEvent&     event,
		    const JModuleRouter& router,
		    JOutput_t            out) const
    {
      static_cast<const JBuild_t&>(*this)(JDAQTimeslice(event, true), router, out);
    }
  };
}

#endif