#ifndef __JTRIGGERPARAMETERS__
#define __JTRIGGERPARAMETERS__

#include <istream>
#include <ostream>
#include <limits>

#include <TROOT.h>
#include <TObject.h>

#include "JROOT/JRoot.hh"
#include "JPhysics/JConstants.hh"

#include "JTrigger/JPrescaler.hh"
#include "JTrigger/JTrigger3DShower_t.hh"
#include "JTrigger/JTriggerMXShower_t.hh"
#include "JTrigger/JTrigger3DMuon_t.hh"
#include "JTrigger/JTriggerNB_t.hh"


/**
 * \author mdejong
 */

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

namespace JTRIGGER {

  /**
   * Data structure for L2 parameters.
   */ 
  struct JL2Parameters :
    public TObject
  {
    /**
     * Default constructor.
     */
    JL2Parameters()
    {
      reset();
    }


    /**
     * Constructor.
     *
     * \param  numberOfHits    minimal number of hits
     * \param  TMaxLocal_ns    maximal time difference [ns]
     * \param  ctMin           minimal cosine space angle between PMT axes
     */
    JL2Parameters(const int    numberOfHits,
		  const double TMaxLocal_ns,
		  const double ctMin)
    {
      this->numberOfHits = numberOfHits;
      this->TMaxLocal_ns = TMaxLocal_ns;
      this->ctMin        = ctMin;
    }


    /**
     * Virtual destructor.
     */
    virtual ~JL2Parameters()
    {}

    
    /**
     * Reset L2 parameters.
     */
    void reset()
    {
      numberOfHits = 0;
      TMaxLocal_ns = 0.0;
      ctMin        = 1.0;
    }

    
    /**
     * Equality
     *
     * \param  parameters       L2 parameters
     * \return                  true if equals; else false
     */
    bool equals(const JL2Parameters& parameters) const
    {
      return (this->numberOfHits == parameters.numberOfHits &&
	      this->TMaxLocal_ns == parameters.TMaxLocal_ns &&
	      this->ctMin        == parameters.ctMin);
    }


    /**
     * Check validity.
     *
     * \return                 true if not-equal to default value; else false
     */
    inline bool is_valid() const
    {
      return !this->equals(JL2Parameters());
    }

    
    ClassDef(JL2Parameters, 1);
	     
    int    numberOfHits;     ///< minimal number of hits
    double TMaxLocal_ns;     ///< maximal time difference [ns]
    double ctMin;            ///< minimal cosine space angle between PMT axes
  };    
  

  /**
   * Data structure for all trigger parameters.
   */
  class JTriggerParameters :
    public TObject
  {
  public:
    /**
     * Default constructor.
     */
    JTriggerParameters()
    {
      reset();
    }


    /**
     * Virtual destructor.
     */
    virtual ~JTriggerParameters()
    {}


    /**
     * Set dependent trigger parameters.
     *
     * \param  DMax_m          maximal distance between PMTs [m]
     */
    void set(const double DMax_m = 0.0)
    {
      using namespace JPHYSICS;

      const double t1 = DMax_m * getIndexOfRefraction() * getInverseSpeedOfLight();

      if (t1 > TMaxEvent_ns) {
	TMaxEvent_ns         = t1;
      }

      trigger3DMuon.DMax_m   = DMax_m;

      // backward compatibility

      if (!L2.is_valid()) {
	L2 = JL2Parameters(2, TMaxLocal_ns, ctMin);
      }

      if (triggerNB.enabled && triggerNB.write.prescale == 0) {
	triggerNB.write.prescale = 1;
      }
    }
    

    /**
     * Reset trigger parameters.
     */
    void reset()
    {
      trigger3DShower.reset();
      triggerMXShower.reset();
      trigger3DMuon  .reset();
      triggerNB      .reset();
      
      highRateVeto_Hz = std::numeric_limits<double>::max();
      L2Min           =    2;
      ctMin           =   -1.0;
      TMaxLocal_ns    =   10.0;
      TMaxEvent_ns    = 1000.0;
      numberOfBins    = 1000;
      combineL1       = true;

      disableHighRateVeto = false;

      L2.reset();
      SN.reset();
      NB.reset();
      
      writeTimeslices = 0;
      writeSummary    = 1;
      writeL0         = 0;
      writeL1         = 0;
      writeL2         = 0;
      writeSN         = 0;
    }


    /**
     * Test equality for high-rate vetos.
     *
     * \param  R1_Hz            high-rate veto
     * \param  R2_Hz            high-rate veto
     * \return                  true if equal; else false
     */
    static bool equals(const double R1_Hz, const double R2_Hz)
    {
      using namespace std;

      if       (R1_Hz <= numeric_limits<int>::max() &&
		R2_Hz <= numeric_limits<int>::max()) {

	return (int) R1_Hz == (int) R2_Hz;

      } else {

	return (R1_Hz >  numeric_limits<int>::max() &&
		R2_Hz >  numeric_limits<int>::max());
      }
    }


    /**
     * Equality
     *
     * \param  parameters       trigger parameters
     * \return                  true if equals; else false
     */
    bool equals(const JTriggerParameters& parameters) const
    {
      return (trigger3DShower.equals(parameters)              &&
	      triggerMXShower.equals(parameters)              &&
	      trigger3DMuon  .equals(parameters)              &&
	      triggerNB      .equals(parameters)              &&

	      equals(highRateVeto_Hz, 
		     parameters.highRateVeto_Hz)              && 

	      L2Min           == parameters.L2Min             &&
	      ctMin           == parameters.ctMin             &&
	      TMaxLocal_ns    == parameters.TMaxLocal_ns      &&
	      TMaxEvent_ns    == parameters.TMaxEvent_ns      &&
	      numberOfBins    == parameters.numberOfBins      &&
	      combineL1       == parameters.combineL1         &&

	      disableHighRateVeto  == parameters.disableHighRateVeto  &&

	      L2.equals(parameters.L2)                        &&
	      SN.equals(parameters.SN)                        &&
	      NB.equals(parameters.NB)                        &&

	      writeSummary   .equals(parameters.writeSummary) &&
	      writeL0        .equals(parameters.writeL0)      &&
	      writeL1        .equals(parameters.writeL1)      &&
	      writeL2        .equals(parameters.writeL2)      &&
	      writeSN        .equals(parameters.writeSN));
    }


    /**
     * Equal operator for trigger parameters.
     *
     * \param  first     event
     * \param  second    event
     * \result           true if first event equal to second; else false
     */
    friend inline bool operator==(const JTriggerParameters& first,
				  const JTriggerParameters& second)
    {
      return first.equals(second);
    }


    /**
     * Type conversion operators.
     */
    inline operator JTrigger3DShower_t::JParameters() const  { return trigger3DShower; }  //!< JTrigger3DShower parameters
    inline operator JTriggerMXShower_t::JParameters() const  { return triggerMXShower; }  //!< JTriggerMXShower parameters
    inline operator JTrigger3DMuon_t::JParameters()   const  { return trigger3DMuon; }    //!< JTrigger3DMuon   parameters
    inline operator JTriggerNB_t::JParameters()       const  { return triggerNB; }        //!< JTrigger3DMuon   parameters


    /**
     * Action method at file open.
     *
     * \param  version   version
     */
    static void actionAtFileOpen(int version)
    {
      ROOT_IO_VERSION = version;
    }


    /**
     * Action method at file read.
     */
    void actionAtFileRead()
    {
      if        (ROOT_IO_VERSION <= 7) {
	
	L2 = JL2Parameters(2, TMaxLocal_ns, ctMin);
      }

      if        (ROOT_IO_VERSION <= 6) {

	trigger3DMuon  .numberOfModules = 1;
	trigger3DShower.numberOfModules = 1;
	
      } else if (ROOT_IO_VERSION <= 8) {

	trigger3DMuon  .numberOfModules = trigger3DMuon  .numberOfHits;
	trigger3DShower.numberOfModules = trigger3DShower.numberOfHits;
      }
      
      if (ROOT_IO_VERSION <= 11) {

	triggerNB.write.prescale = triggerNB.enabled ? 1 : 0;
      }
    }
    

    ClassDef(JTriggerParameters,14);


    // Trigger specific parameters

    JTrigger3DShower_t::JParameters trigger3DShower;
    JTriggerMXShower_t::JParameters triggerMXShower;
    JTrigger3DMuon_t::JParameters   trigger3DMuon;
    JTriggerNB_t::JParameters       triggerNB;


    // Global parameters

    double     highRateVeto_Hz;    ///< high-rate veto [Hz]
    int        L2Min;              ///< minimal number of L0 hits for L2 
    double     ctMin;              ///< this parameter has been deprecated
    double     TMaxLocal_ns;       ///< maximal time difference between L0  hits for L1
    double     TMaxEvent_ns;       ///< maximal time before and after event for snapshot
    int        numberOfBins;       ///< number of bins for lookup table of timeslice
    bool       combineL1;          ///< combine multiple L1s in many-fold coincidence
    bool       disableHighRateVeto;///< disable high-rate veto

    JL2Parameters L2;              ///< L2 processing
    JL2Parameters SN;              ///< Supernova trigger
    JL2Parameters NB;              ///< nano-beacon trigger
    
    JPrescaler writeTimeslices;    ///< write JDAQTimeslice with L0 data (deprecated)
    JPrescaler writeSummary;       ///< write JDAQSummaryslice
    JPrescaler writeL0;            ///< write JDAQTimeslice with L0 data
    JPrescaler writeL1;            ///< write JDAQTimeslice with L1 data
    JPrescaler writeL2;            ///< write JDAQTimeslice with L2 data
    JPrescaler writeSN;            ///< write JDAQTimeslice with SN data

    static int ROOT_IO_VERSION;    //!< Streamer version of JTriggerParameters as obtained from ROOT file.
  };
}


/**
 * Read L2 parameters from input.
 *
 * \param  in            input stream
 * \param  parameters    L2 parameters
 * \return               input stream
 */
std::istream& operator>>(std::istream& in, JTRIGGER::JL2Parameters& parameters);


/**
 * Write L2 parameters to output.
 *
 * \param  out           output stream
 * \param  parameters    L2 parameters
 * \return               output stream
 */
std::ostream& operator<<(std::ostream& out, const JTRIGGER::JL2Parameters& parameters);


/**
 * Read trigger parameters from input.
 *
 * \param  in            input stream
 * \param  parameters    trigger parameters
 * \return               input stream
 */
std::istream& operator>>(std::istream& in, JTRIGGER::JTriggerParameters& parameters);


/**
 * Write trigger parameters to output.
 *
 * \param  out           output stream
 * \param  parameters    trigger parameters
 * \return               output stream
 */
std::ostream& operator<<(std::ostream& out, const JTRIGGER::JTriggerParameters& parameters);

#endif