using System;
using System.Drawing;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HEAL.Attic;

namespace HeuristicLab.Problems.MetaOptimization {
  [Item("TypeValue", "Represents a type.")]
  [StorableType("156764EA-AA45-45DE-81CC-E5FC8A54DE87")]
  public class TypeValue : Item {
    public static new Image StaticItemImage {
      get { return HeuristicLab.Common.Resources.VSImageLibrary.Field; }
    }

    [Storable]
    protected Type value;
    public virtual Type Value {
      get { return value; }
      set {
        if (ReadOnly) throw new NotSupportedException("Value cannot be set. TypeValue is read-only.");
        if (!value.Equals(this.value)) {
          this.value = value;
          OnValueChanged();
        }
      }
    }

    [Storable]
    protected bool readOnly;
    public virtual bool ReadOnly {
      get { return readOnly; }
    }

    public TypeValue()
      : base() {
      this.readOnly = false;
    }
    public TypeValue(Type value)
      : base() {
      this.Value = value;
      this.readOnly = false;
    }
    [StorableConstructor]
    protected TypeValue(StorableConstructorFlag _) : base(_) { }
    protected TypeValue(TypeValue original, Cloner cloner)
      : base(original, cloner) {
      this.value = original.value;
      this.readOnly = original.readOnly;
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new TypeValue(this, cloner);
    }

    public virtual TypeValue AsReadOnly() {
      TypeValue readOnlyValueTypeValue = (TypeValue)this.Clone();
      readOnlyValueTypeValue.readOnly = true;
      return readOnlyValueTypeValue;
    }

    public override string ToString() {
      if (value == null) return "No Type information";
      return value.Name;
    }

    public event EventHandler ValueChanged;
    protected virtual void OnValueChanged() {
      if (ValueChanged != null)
        ValueChanged(this, EventArgs.Empty);
      OnToStringChanged();
    }
  }
}