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

namespace HeuristicLab.Problems.MetaOptimization {
  [StorableClass]
  public class SingleValuedParameterConfiguration : ParameterConfiguration {

    #region Constructors and Cloning
    [StorableConstructor]
    protected SingleValuedParameterConfiguration(bool deserializing) : base(deserializing) { }
    public SingleValuedParameterConfiguration(string parameterName, IValueParameter valueParameter)
      : base(parameterName, valueParameter, false) {
      this.Optimize = true;
      base.PopulateValueConfigurations();
      this.ValueConfigurations.Single().Optimize = true;
    }
    public SingleValuedParameterConfiguration(string parameterName, IValueConfiguration valueConfiguration)
      : base() {
      this.ParameterName = parameterName;
      this.parameterDataType = valueConfiguration.ActualValue.ValueDataType;
      this.valueDataType = valueConfiguration.ActualValue.ValueDataType;
      this.discoverValidValues = false;
      this.validValues = new ItemSet<IItem> { valueConfiguration.ActualValue.Value };
      this.validTypes = new Type[] { valueConfiguration.ActualValue.ValueDataType };
      this.isNullable = false;
      this.itemImage = valueConfiguration.ItemImage;
      this.ValueConfigurations = new CheckedValueConfigurationList { valueConfiguration };
      this.ValueConfigurations.Single().Optimize = true;
      valueConfiguration.ToStringChanged += new EventHandler(valueConfiguration_ToStringChanged);
      this.ActualValue = new ConstrainedValue(
        valueConfiguration.ActualValue.Value,
        valueConfiguration.ActualValue.ValueDataType,
        this.validValues,
        this.IsNullable);
    }
    protected SingleValuedParameterConfiguration(SingleValuedParameterConfiguration original, Cloner cloner)
      : base(original, cloner) {
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new SingleValuedParameterConfiguration(this, cloner);
    }
    #endregion

    protected override void PopulateValueConfigurations() {
      // don't change valueconfigurations, since it only contains the one element specified in constructor
    }

    protected override void ClearValueConfigurations() {
      // do nothing
    }

    public override string ToString() {
      if (this.valueConfigurations.Single() is SymbolValueConfiguration) {
        var syVc = (SymbolValueConfiguration)this.valueConfigurations.Single();
        if (this.Optimize) {
          return syVc.ToString() + " (Optimize)";
        } else {
          return ActualValue.ToString();
        }
      } else {
        return base.ToString();
      }
    }

    protected virtual void valueConfiguration_ToStringChanged(object sender, EventArgs e) {
      OnToStringChanged();
    }

    public override string ParameterInfoString {
      get {
        if (this.Optimize) {
          return string.Format("{0} ({1})", this.Name, this.ValueConfigurations.Single().ParameterInfoString);
        } else {
          return string.Empty;
        }
      }
    }
  }
}