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

namespace HeuristicLab.Problems.MetaOptimization {
  /// <summary>
  /// An operator which creates a new random permutation of integer values.
  /// </summary>
  [Item("RandomParameterVectorCreator", "An operator which creates a new set of parameters TODO.")]
  [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[MetaOptimizationProblem.ParameterConfigurationTreeParameterName]; }
    }

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

    [StorableConstructor]
    private RandomParameterConfigurationCreator(bool deserializing) : base(deserializing) { }
    private RandomParameterConfigurationCreator(RandomParameterConfigurationCreator original, Cloner cloner) : base(original, cloner) { }
    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>(MetaOptimizationProblem.ParameterConfigurationTreeParameterName, "The parameter configuration tree on which the new solution will be based on."));
      Parameters.Add(new ValueLookupParameter<ParameterConfigurationTree>("ParameterConfigurationTreeSolutionCandidate", "The new random parameter set."));
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new RandomParameterConfigurationCreator(this, cloner);
    }

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