//-*- Mode: C++ -*-
// $Id$

#ifndef ALIHLTCTPDATA_H
#define ALIHLTCTPDATA_H
//* This file is property of and copyright by the ALICE HLT Project        * 
//* ALICE Experiment at CERN, All rights reserved.                         *
//* See cxx source for full Copyright notice                               *

/** @file   AliHLTCTPData.h
    @author Matthias Richter
    @date   2009-08-20
    @brief  Container for CTP trigger classes and counters
*/

#include "TNamed.h"
#include "TClonesArray.h"
#include "TArrayL64.h"
#include "AliHLTLogging.h"
#include "AliHLTDataTypes.h"
#include "AliHLTReadoutList.h"
#include <string>

/**
 * @class AliHLTCTPData
 * This is a container for the CTP trigger classes, the mapping to the bit
 * field, and counters.
 *
 * The class is initialized from CTP_TRIGGER_CLASSES part of the ECS parameters.
 * and stores internally a list of trigger classes holding the information on bit
 * position, class name and involved detectors. The general format og the parameter
 * is as follows:
 * <pre>
 * [bit position]:[Trigger class identifier string]:[detector-id-nr]-[detector-id-nr]-...,[bit position]:.....
 * </pre>
 *
 * The list of participating detectors is converted into an AliHLTReadoutList
 * object named after the trigger class name, and can be used as mask for the
 * readout list generated by a component.
 *
 * The object is also stored as part of the HLTGlobalTriggerDecision
 * @ingroup alihlt_trigger
 */
class AliHLTCTPData: public TNamed, public AliHLTLogging
{
 public:
  /// default constructor
  AliHLTCTPData();
  /// standard constructor including initialization from CTP_TRIGGER_CLASS
  AliHLTCTPData(const char* parameter);
  /// copy constructor
  AliHLTCTPData(const AliHLTCTPData&);
  ///assignment operator
  AliHLTCTPData& operator=(const AliHLTCTPData&);
  /// destructor
  virtual ~AliHLTCTPData();

  /// Add counters
  AliHLTCTPData& operator += (const AliHLTCTPData&);
  /// Add counters
  AliHLTCTPData operator + (const AliHLTCTPData&) const;

  /// Subtract counters
  AliHLTCTPData& operator -= (const AliHLTCTPData&);
  /// Subtract counters
  AliHLTCTPData operator - (const AliHLTCTPData&) const;

  /**
   * Init the class ids and mapping from the CTP_TRIGGER_CLASS parameter.
   * The general format of the parameter is as follows:
   */
  int InitCTPTriggerClasses(const char* ctpString);

  /// etract the active trigger mask from the trigger data
  static AliHLTTriggerMask_t ActiveTriggers(const AliHLTComponentTriggerData& trigData);

  /**
   * Evaluate an expression of trigger class ids with respect to the trigger mask.
   */
  bool EvaluateCTPTriggerClass(const char* expression, const AliHLTComponentTriggerData& trigData) const;

  /**
   * Evaluate an expression of trigger class ids with respect to the trigger mask.
   */
  bool EvaluateCTPTriggerClass(const char* expression, AliHLTTriggerMask_t triggerMask) const;

  /**
   * Evaluate an expression of trigger class ids with respect to the current trigger mask.
   */
  bool EvaluateCTPTriggerClass(const char* expression) const {
    return EvaluateCTPTriggerClass(expression, fTriggers);
  }

  /**
   * Reset all counters
   */
  void ResetCounters();

  /**
   * Get index of a trigger class in the tigger pattern
   */
  int Index(const char* name) const;

  /**
   * Check state of a trigger class.
   * If the class name is not part of the current trigger setup (i.e. ECS parameter
   * does not contain a trigger definition for this class name) the function
   * returns -1
   * @return -1 class name not initialized, 
   *          0 trigger not active
   *          1 trigger active
   */
  int CheckTrigger(const char* name) const;

  /**
   * Increment counter for CTP trigger classes
   * @param classIds  comma separated list of class ids
   */
  void Increment(const char* classIds);

  /**
   * Increment counter for CTP trigger classes
   * @param triggerPattern  corresponds to the 100bit trigger mask in the CDH
   */
  void Increment(AliHLTTriggerMask_t triggerPattern);

  /**
   * Increment counter for a CTP trigger class
   * @param classIdx  index of the class in the 100bit trigger mask
   */
  void Increment(int classIdx);

  /**
   * Increment counters according to the trigger data struct.
   * First extract trigger pattern from the CDH and then
   * increment from the trigger pattern.
   */
  int Increment(AliHLTComponentTriggerData& trigData);

  /**
   * Return a readout list for the active trigger classes.
   * The list is an 'OR' of the active trugger classes.
   */
  AliHLTReadoutList ReadoutList(const AliHLTComponentTriggerData& trigData) const;

  /**
   * Return a readout list for the active trigger classes.
   * The list is an 'OR' of the active trugger classes.
   */
  AliHLTReadoutList ReadoutList(AliHLTTriggerMask_t triggerMask) const;

  /**
   * Return a readout list for the active trigger classes.
   * The list is an 'OR' of the active trugger classes.
   */
  AliHLTReadoutList ReadoutList() const {
    return ReadoutList(fTriggers);
  }

  /**
   * Inherited from TObject, this prints the contents of the trigger decision.
   */
  virtual void Print(Option_t* option = "") const;

  AliHLTTriggerMask_t   Mask() const { return fMask; }
  AliHLTTriggerMask_t   Triggers() const { return fTriggers; }
  void                  SetTriggers(AliHLTTriggerMask_t triggers) { fTriggers=triggers; }
  void                  SetTriggers(AliHLTComponentTriggerData trigData) {SetTriggers(ActiveTriggers(trigData));}
  const TArrayL64&      Counters() const { return fCounters; }
  AliHLTUInt64_t        Counter(int index) const;
  AliHLTUInt64_t        Counter(const char* classId) const;
  const char*           Name(int index) const;

 protected:
 private:
  /// Helper                                                                          
  std::string TriggerMaskToString(AliHLTTriggerMask_t mask) const;

  /**
   * Add counters.
   * Base methods for operators.
   * @param src    instance to add
   * @param factor +1/-1 for addition/subtraction
   * @skipped      target to get the numner of not matching class names
   */
  int Add(const AliHLTCTPData& src, int factor, int &skipped);

  /**
   * Read the map of trigger class indexes
   * The map is used in the generation of the TFormula from the trigger
   * expression in order to handle similar class names correctly.
   * For names like 'base', 'baseA', 'baseB' the class with the longer name
   * has to be replaced first.
   */
  int ReadMap(vector<unsigned> &map) const;

  int ReadMap() {return ReadMap(fMap);}

  AliHLTTriggerMask_t fMask;      /// mask of initialized trigger classes
  AliHLTTriggerMask_t fTriggers;  /// current trigger
  TClonesArray        fClassIds;  /// array of trigger class ids
  TArrayL64           fCounters;  /// trigger class counters
  vector<unsigned>    fMap;     //! index map for trigger expression evaluation

  ClassDef(AliHLTCTPData, 3)
};

#endif