using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Core;
using HeuristicLab.Common;

namespace HeuristicLab.Parameters {
  [StorableClass]
  public class ParameterActualNameBinding : IParameterBinding {
    [Storable]
    private ILookupParameter source;
    public ILookupParameter Source {
      get { return source; }
    }
    [Storable]
    private ILookupParameter destination;
    public ILookupParameter Destination {
      get { return destination; }
    }

    [StorableConstructor]
    protected ParameterActualNameBinding(bool deserializing) { }
    protected ParameterActualNameBinding(ParameterActualNameBinding original, Cloner cloner) {
      this.source = cloner.Clone(source);
      this.destination = cloner.Clone(destination);
      RegisterEventHandlers();
    }
    public ParameterActualNameBinding(ILookupParameter source, ILookupParameter destination) {
      if (source == null) throw new ArgumentNullException("source");
      if (destination == null) throw new ArgumentNullException("destination");
      this.source = source;
      this.destination = destination;
      RegisterEventHandlers();
    }

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

    public void Bind() {
      RegisterEventHandlers();
    }

    public void Unbind() {
      DeregisterEventHandlers();
    }

    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      RegisterEventHandlers();
    }

    private void RegisterEventHandlers() {
      source.ActualNameChanged += new EventHandler(source_ActualNameChanged);
    }

    private void DeregisterEventHandlers() {
      source.ActualNameChanged -= new EventHandler(source_ActualNameChanged);
    }
    

    private void source_ActualNameChanged(object sender, EventArgs e) {
      if (destination.ActualName != source.ActualName)
        destination.ActualName = source.ActualName;
    }
  }
}