#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Encodings.ParameterConfigurationEncoding {
  /// <summary>
  /// An operator which creates a new set of parameters.
  /// </summary>
  [Item("RandomParameterVectorCreator", "An operator which creates a new set of parameters.")]
  [StorableClass]
  public sealed class RandomParameterConfigurationCreator : SingleSuccessorOperator, IStochasticOperator, IParameterConfigurationCreator {
    public override bool CanChangeName {
      get { return false; }
    }

    public ILookupParameter<IRandom> RandomParameter {
      get { return (LookupParameter<IRandom>)Parameters["Random"]; }
    }
    public ILookupParameter<ParameterConfigurationTree> InitialParameterConfigurationParameter {
      get { return (ILookupParameter<ParameterConfigurationTree>)Parameters["ParameterConfiguration"]; }
    }

    public IValueLookupParameter<ParameterConfigurationTree> ParameterConfigurationParameter {
      get { return (IValueLookupParameter<ParameterConfigurationTree>)Parameters["ParameterConfigurationTreeSolutionCandidate"]; }
    }

    #region Constructors and Cloning
    public RandomParameterConfigurationCreator()
      : base() {
      Parameters.Add(new LookupParameter<IRandom>("Random", "The pseudo random number generator which should be used to initialize the new random permutation."));
      Parameters.Add(new LookupParameter<ParameterConfigurationTree>("ParameterConfiguration", "The parameter configuration tree on which the new solution will be based on."));
      Parameters.Add(new ValueLookupParameter<ParameterConfigurationTree>("ParameterConfigurationTreeSolutionCandidate", "The new random parameter set."));
    }

    [StorableConstructor]
    private RandomParameterConfigurationCreator(bool deserializing) : base(deserializing) { }
    private RandomParameterConfigurationCreator(RandomParameterConfigurationCreator original, Cloner cloner) : base(original, cloner) { }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new RandomParameterConfigurationCreator(this, cloner);
    }
    #endregion

    public override IOperation Apply() {
      ParameterConfigurationParameter.ActualValue = (ParameterConfigurationTree)InitialParameterConfigurationParameter.ActualValue.Clone();
      ParameterConfigurationParameter.ActualValue.Randomize(RandomParameter.ActualValue);
      return base.Apply();
    }
  }
}