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

namespace HeuristicLab.Analysis.FitnessLandscape.Algorithms {

  [Item("ScopeDuplicator", "Places clones of the first sub-scope as sub-scopes into n newly created scopes.")]
  [StorableClass]
  public class ScopeDuplicator : SingleSuccessorOperator {

    #region Parameter Properties
    public LookupParameter<IntValue> NrOfDuplicatesParameter {
      get { return (LookupParameter<IntValue>)Parameters["NrOfDuplicates"]; }
    }
    #endregion

    #region Parameter Values
    private int NrOfDuplicates {
      get { return NrOfDuplicatesParameter.ActualValue.Value; }
    }
    #endregion

    #region Construction & Cloning
    [StorableConstructor]
    protected ScopeDuplicator(bool deserializing) : base(deserializing) { }
    protected ScopeDuplicator(ScopeDuplicator original, Cloner cloner) : base(original, cloner) { }
    public ScopeDuplicator()
      : base() {
      Parameters.Add(new LookupParameter<IntValue>("NrOfDuplicates", "Nr of copies to be created from the first sub-scope."));
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new ScopeDuplicator(this, cloner);
    }
    #endregion

    public override IOperation Apply() {
      IScope parentScope = ExecutionContext.Scope;
      if (parentScope.SubScopes.Count > 0) {
        IScope scope = parentScope.SubScopes[0];
        parentScope.SubScopes.Remove(scope);
        for (int i = 0; i<NrOfDuplicates; i++) {
          IScope subScope = new Scope(i.ToString()) { Parent = parentScope };
          parentScope.SubScopes.Add(subScope);
          IScope clone = (IScope)scope.Clone();
          clone.Parent = subScope;
          subScope.SubScopes.Add(clone);
          foreach (Variable var in parentScope.Variables) {
            if (!(var.Value is IRandom))
              subScope.Variables.Add((Variable)var.Clone());
          }
        }
        parentScope.Variables.AddRange(scope.Variables);
      }
      return base.Apply();
    }
  }
}