namespace HeuristicLab.Problems.ProgramSynthesis.Base.Erc.Float {
  using HeuristicLab.Common;
  using HeuristicLab.Core;
  using HeuristicLab.Data;
  using HeuristicLab.Parameters;
  using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

  [StorableClass]
  public class FloatRangeErc : WeightedErcItem<double> {
    private const string RangeParameterName = "Range";

    public FloatRangeErc() : this(true, 0d, 0d) { }

    public FloatRangeErc(double start, double end) : this(true, start, end) { }

    public FloatRangeErc(bool isEnabled, double start, double end, double weight = 1d) : base(isEnabled, weight) {
      Parameters.Add(new FixedValueParameter<DoubleRange>(RangeParameterName, new DoubleRange(start, end)));
      RangeParameter.Value.ToStringChanged += (sender, args) => UpdateName();
      UpdateName();
    }

    private void UpdateName() {
      Name = RangeParameter.Value.ToString();
    }

    [StorableConstructor]
    public FloatRangeErc(bool deseralizing) : base(deseralizing) { }

    public FloatRangeErc(FloatRangeErc origin, Cloner cloner) : base(origin, cloner) { }

    public IValueParameter<DoubleRange> RangeParameter
    {
      get { return (IValueParameter<DoubleRange>)Parameters[RangeParameterName]; }
    }

    public double Start
    {
      get { return RangeParameter.Value.Start; }
      set { RangeParameter.Value.Start = value; }
    }

    public double End
    {
      get { return RangeParameter.Value.End; }
      set { RangeParameter.Value.End = value; }
    }

    public override double GetErcValue(IRandom random) {
      return Start < End && IsEnabled ? random.NextDouble() * (End - Start) + Start : 0d;
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new FloatRangeErc(this, cloner);
    }
  }
}