using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HeuristicLab.BioBoost.Operators.Mutation;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.BioBoost.Operators.Moves {

  [StorableClass]
  public class MoveGeneratorAdapter : SingleSuccessorOperator, IMoveGenerator {

    public IConstrainedValueParameter<IManipulator> ManipulatorParameter { get { return (IConstrainedValueParameter<IManipulator>) Parameters["Manipulator"]; } }
    public IManipulator Manipulator { get { return ManipulatorParameter.Value; } }

    public IValueLookupParameter<IntValue> SampleSizeParameter { get { return (IValueLookupParameter<IntValue>) Parameters["SampleSize"]; } }
    public int SampleSize { get { return SampleSizeParameter.ActualValue.Value; } }

    #region construction & cloning
    [StorableConstructor]
    public MoveGeneratorAdapter(bool isDeserializing) : base(isDeserializing) { }

    public MoveGeneratorAdapter(MoveGeneratorAdapter orig, Cloner cloner) : base(orig, cloner) { }

    public MoveGeneratorAdapter() {
      Parameters.Add(new ValueLookupParameter<IntValue>("SampleSize", "The number of moves to generate."));
      Parameters.Add(new LookupParameter<IntValue>("Generations", "rename value to iterations", "Iterations"));
      Parameters.Add(new LookupParameter<IntValue>("MaximumGenerations", "rename value to maximum iterations", "MaximumIterations"));
      Parameters.Add(new ConstrainedValueParameter<IManipulator>("Manipulator", "The actual maniuplator that should be wrapped.",
        new ItemSet<IManipulator>(ApplicationManager.Manager.GetInstances<IManipulator>())));
      ManipulatorParameter.Value =
        ManipulatorParameter.ValidValues.FirstOrDefault(m => m.GetType() == typeof (MultiMutator));
    }

    public override IDeepCloneable Clone(Cloner cloner) { return new MoveGeneratorAdapter(this, cloner); }
    #endregion

    public override IOperation Apply() {
      var successors = new OperationCollection();
      for (int i = 0; i < SampleSize; i++) {
        var subscope = new Scope(i.ToString());
        foreach (var variable in ExecutionContext.Scope.Variables) {
          subscope.Variables.Add(new Variable(variable.Name, (IItem) variable.Value.Clone()));
        }
        ExecutionContext.Scope.SubScopes.Add(subscope);
        successors.Add(ExecutionContext.CreateChildOperation((IOperator) Manipulator.Clone(), subscope));
      }
      successors.Add(base.Apply());
      return successors;
    }
  }
}