////////////////////////////////////////////////////////////////////////
/// \class RAT::Optimisers::MetaNSeed
///
/// \brief  Alter the seed N times and optimise
///
/// \author Phil G Jones <p.jones22@physics.ox.ac.uk>
/// \author Matt Mottram < m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:\n
///     26/04/2011 : P G Jones - New file \n
///
/// \details Optimises N times with N different seeds and chooses the best.
///         Base class for Meta Optimisers that differ only in seeding
///         conditions. This class changes the seed using a gaussian spread
///         based on the initial seed error.
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_Optimiser_MetaNSeed__
#define __RAT_Optimiser_MetaNSeed__

#include <RAT/MetaOptimiser.hh>
#include <RAT/DS/FitResult.hh>

#include <string>
#include <vector>

namespace RAT
{

namespace Optimisers
{

class MetaNSeed : public MetaOptimiser
{
public:
  ~MetaNSeed();

  virtual std::string GetName() const { return MetaNSeed::Name(); }

  static std::string Name() { return std::string( "metaNSeed" ); }

  /// Minimise the component
  virtual double Minimise();

  /// Maximise the component
  virtual double Maximise();

  /// Initialise the MetaOptimiser
  virtual void Initialise( const std::string& param );

  /// Load settings from ratdb
  virtual void BeginOfRun( DS::Run& run );

  virtual void EndOfRun( DS::Run& run );

protected:
  /// Produce a new seed based on the start seed
  virtual DS::FitResult NewSeed( const DS::FitResult& startSeed );

  /// Optimize the component
  double Optimise();

  Optimiser* fOptimiser; ///< Pointer to optimiser used by this meta optimiser, owned by this class => Must delete

  int fNSeeds;       ///< Number of seeds to try
  double fMinFactor; ///< Min factor, -1 for maximise.
};

} //::Optimiser

} //::RAT

#endif