//-*- Mode: C++ -*-
// $Id: AliHLTCaloClusterizerComponent.h 36636 2009-11-11 02:16:41Z odjuvsla $


/**************************************************************************
 * This file is property of and copyright by the ALICE HLT Project        *
 * All rights reserved.                                                   *
 *                                                                        *
 * Primary Authors: Oystein Djuvsland                                     *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

#ifndef ALIHLTCALOCLUSTERIZERCOMPONENT_H
#define ALIHLTCALOCLUSTERIZERCOMPONENT_H



/**
 * Clusterizer component for PHOS HLT
 *
 * @file   AliHLTCaloClusterizerComponent.h
 * @author Oystein Djuvsland
 * @date
 * @brief  A clusterizer component for PHOS HLT
*/

// see below for class documentation
// or
// refer to README to build package
// or
// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt

#include "AliHLTCaloConstantsHandler.h"
#include "AliHLTCaloProcessor.h"

class AliHLTCaloRecoParamHandler;
class AliHLTCaloDigitDataStruct;
class AliHLTCaloDigitContainerDataStruct;
class AliHLTCaloClusterizer;
class AliHLTCaloClusterAnalyser;
class AliHLTCaloRecPointDataStruct;
class AliHLTPHOSHistoProdClusterEnergy;

/**
 * @class AliHLTCaloClusterizerComponent
 *
 * Class for running clusterization for PHOS in HLT. It takes digits as input and
 * gives reconstruction points as output.
 *
 * The component has the following component arguments:
 * -clusterthreshold       The energy threshold for starting a new rec point
 * -energythreshold        The energy threshold for including a digit in a
 *                         rec point
 * @ingroup alihlt_phos
 */

/**
 * @class AliHLTCaloClusterizerComponent
 *
 * Class for running clusterization for PHOS in HLT.
 *
 * <h2>General properties:</h2>
 *
 * Component ID: \b PhosClusterizer <br>
 * Library: \b libAliHLTPHOS.so     <br>
 * Input Data Types: @ref AliHLTPHOSDefinitions::fgkDigitDataType<br>
 * Output Data Types: @ref AliHLTPHOSDefinitions::fgkRecPointDataType<br>
 *
 * <h2>Mandatory arguments:</h2>
 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
 * \li No mandatory arguments for component                           <br>
 *
 * <h2>Optional arguments:</h2>
 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
 * \li -digitthreshold      <i> value </i> <br>
 *      threshold for a digit to be added to a rec point in GeV (default value: 0.03)
 * \li -recpointthreshold <i> value </i> <br>
 *      threshold for starting a new rec point  (default value: 0.2)
 * \li -partitionmode
 *      if we want to do clusterisation on the partition level (not available...) (defaul value: false)
 *
 * <h2>Configuration:</h2>
 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
 * \li No configuration arguments
 *
 * <h2>Default CDB entries:</h2>
 * \li No CDB entry yet, will come.
 *
 * <h2>Performance:</h2>
 * Pretty good (~ 3 kHz), depends on amount of data...
 *
 * <h2>Memory consumption:</h2>
 * Depends on the amount of data, but pretty godd
 *
 * <h2>Output size:</h2>
 * Depends on the amount of data...
 *
 * More detailed description. (At some point...)
 *
 * @ingroup alihlt_phos
 */

//class AliHLTCaloClusterizerComponent : public AliHLTCaloConstantsHandler, public AliHLTCaloProcessor
class AliHLTCaloClusterizerComponent : public AliHLTCaloProcessor, public AliHLTCaloConstantsHandler
  {
  public:

    /** Constructor */
    AliHLTCaloClusterizerComponent(TString det);

    /** Destructor */
    virtual ~AliHLTCaloClusterizerComponent();

    /** interface function, see @ref AliHLTComponent for description */

    using  AliHLTCaloProcessor::DoEvent;

    int DoEvent ( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
                  AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr, AliHLTUInt32_t& size,
                  std::vector<AliHLTComponentBlockData>& outputBlocks );

    /** 
     * Compare two digits, used during the sorting
     */
    static Int_t CompareDigits(const void *dig0, const void *dig);
    
  protected:

    /** interface function, see @ref AliHLTComponent for
	description */
    virtual int DoInit ( int argc, const char** argv );

    /** interface function, see @ref AliHLTComponent for description */
    virtual int DoDeinit();

    /** Initialise geometry objects */
    virtual Int_t InitialiseGeometry() = 0;

    /** interface function, see @ref AliHLTComponent for description */
    int Reconfigure ( const char* cdbEntry, const char* chainId );

    /** interface function, see @ref AliHLTComponent for description */
    int ScanConfigurationArgument ( int argc, const char** argv );
    
     /** The data origin */
    char* fDataOrigin;                           //COMMENT

    /** Pointer to the cluster analyser */
    AliHLTCaloClusterAnalyser *fAnalyserPtr;                         //! transient
    
    /** Pointer to reconstruction parameters handler */
    AliHLTCaloRecoParamHandler *fRecoParamsPtr; //! transient

  private:

    /** Array of pointers to our digits */
    AliHLTCaloDigitDataStruct **fDigitsPointerArray;              //! transient
    
    /** Array of pointers to our digits */
    AliHLTCaloDigitDataStruct *fOutputDigitsArray;              //! transient
    
    /** Pointer to the clusterizer it self */
    AliHLTCaloClusterizer* fClusterizerPtr;                       //! transient

    /** Number of digits in event */
    Int_t fDigitCount;                                            //COMMENT
    
    /** Default constructor, not implemented */
    AliHLTCaloClusterizerComponent();                             //COMMENT

    /** Copy constructor  not implemented */
    AliHLTCaloClusterizerComponent ( const AliHLTCaloClusterizerComponent &); // not implemented
    
    /** Assignment */
    AliHLTCaloClusterizerComponent & operator = ( const AliHLTCaloClusterizerComponent &); // not implemented
    
   
  };

#endif