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

namespace HeuristicLab.Problems.MetaOptimization {
  [StorableClass]
  public class NumericRange : Item, INumericRange {
    [Storable]
    private IntValue lowerBound;
    public IntValue LowerBound {
      get { return lowerBound; }
      set {
        if (lowerBound != value) {
          if (lowerBound != null) {
            lowerBound.ValueChanged -= new EventHandler(lowerBound_ValueChanged);
          }
          lowerBound = value;
          if (lowerBound != null) {
            lowerBound.ValueChanged += new EventHandler(lowerBound_ValueChanged);
          }
          OnLowerBoundChanged();
        }
      }
    }

    [Storable]
    private IntValue upperBound;
    public IntValue UpperBound {
      get { return upperBound; }
      set {
        if (upperBound != value) {
          if (upperBound != null) {
            upperBound.ValueChanged -= new EventHandler(upperBound_ValueChanged);
          }
          upperBound = value;
          if (upperBound != null) {
            upperBound.ValueChanged += new EventHandler(upperBound_ValueChanged);
          }
          OnUpperBoundChanged();
        }
      }
    }

    [Storable]
    private IntValue stepSize;
    public IntValue StepSize {
      get { return stepSize; }
      set {
        if (stepSize != value) {
          if (stepSize != null) {
            stepSize.ValueChanged -= new EventHandler(upperBound_ValueChanged);
          }
          stepSize = value;
          if (stepSize != null) {
            stepSize.ValueChanged += new EventHandler(stepSize_ValueChanged);
          }
          OnStepSizeChanged();
        }
      }
    }

    public NumericRange() {
      LowerBound = new IntValue(0);
      UpperBound = new IntValue(0);
      StepSize = new IntValue(1);
    }

    [StorableConstructor]
    protected NumericRange(bool deserializing) : base(deserializing) { }

    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      if (lowerBound != null) {
        lowerBound.ValueChanged += new EventHandler(lowerBound_ValueChanged);
      }
      if (upperBound != null) {
        upperBound.ValueChanged += new EventHandler(upperBound_ValueChanged);
      }
      if (stepSize != null) {
        stepSize.ValueChanged += new EventHandler(stepSize_ValueChanged);
      }
    }

    void lowerBound_ValueChanged(object sender, EventArgs e) {
      OnToStringChanged();
    }
    void upperBound_ValueChanged(object sender, EventArgs e) {
      OnToStringChanged();
    }
    void stepSize_ValueChanged(object sender, EventArgs e) {
      OnToStringChanged();
    }

    public event EventHandler LowerBoundChanged;
    private void OnLowerBoundChanged() {
      var handler = LowerBoundChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler UpperBoundChanged;
    private void OnUpperBoundChanged() {
      var handler = UpperBoundChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }
    public event EventHandler StepSizeChanged;
    private void OnStepSizeChanged() {
      var handler = StepSizeChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public override string ToString() {
      return string.Format("[{0},{1}:{2}]", LowerBound.ToString(), UpperBound.ToString(), StepSize.ToString());
    }

    #region Cloning
    public override Common.IDeepCloneable Clone(Common.Cloner cloner) {
      NumericRange clone = (NumericRange)base.Clone(cloner);
      clone.LowerBound = (IntValue)this.LowerBound.Clone();
      clone.UpperBound = (IntValue)this.UpperBound.Clone();
      clone.StepSize = (IntValue)this.StepSize.Clone();
      return base.Clone(cloner);
    }
    #endregion
  }
}