using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HeuristicLab.Analysis;
using HeuristicLab.Collections;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DatastreamAnalysis {
  /// <summary>
  /// A set of bars, each having name and value.
  /// </summary>
  [Item("DataBarSet", "A set of bars, each having name and value.")]
  [StorableClass]
  public class DataBarSet : NamedItem {
    public static new Image StaticItemImage {
      get { return HeuristicLab.Common.Resources.VSImageLibrary.Performance; }
    }

    #region properties

    [Storable]
    private NamedItemCollection<DataBar> bars;

    public NamedItemCollection<DataBar> Bars {
      get { return bars; }
      set {
        if (bars != value) {
          if(value == null) throw new ArgumentNullException("Value for Bars must not be null.");
          if(bars != null) DeregisterBarsEvents();
          bars = value;
          RegisterBarsEvents();
        }
      }
    }

    #endregion

    #region constructors, cloner,...
    [StorableConstructor]
    protected DataBarSet(bool deserializing) : base(deserializing) { }

    public DataBarSet() : base() {
      Name = "DataBarSet";
      Bars = new NamedItemCollection<DataBar>();
    }

    public DataBarSet(string name) : base(name) {
      Bars = new NamedItemCollection<DataBar>();
    }

    public DataBarSet(string name, string description) : base(name, description) {
      Bars = new NamedItemCollection<DataBar>();
    }

    public DataBarSet(DataBarSet original, Cloner cloner) : base(original, cloner) {
      Bars = cloner.Clone(original.bars);
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new DataBarSet(this, cloner);
    }
    #endregion

    #region events

    //public event EventHandler BarsPropertyChanged;


    //protected virtual void OnBarsPropertyChanged() {
    //  EventHandler handler = BarsPropertyChanged;
    //  if (handler != null) handler(this, EventArgs.Empty);
    //}

    //private void Bars_PropertyChanged(object sender, PropertyChangedEventArgs e) {
    //  OnBarsPropertyChanged();
    //}

    public event EventHandler ThresholdsPropertyChanged;

    protected virtual void OnThresholdsPropertyChanged() {
      EventHandler handler = ThresholdsPropertyChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    private void Thresholds_PropertyChanged(object sender, PropertyChangedEventArgs e) {
      OnThresholdsPropertyChanged();
    }



    public event EventHandler BarsPropertyChanged;
    public event EventHandler BarValueChanged;
    protected virtual void OnBarsPropertyChanged() {
      EventHandler handler = BarsPropertyChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    protected virtual void OnBarValueChanged(PropertyChangedEventArgs e) {
      EventHandler handler = BarValueChanged;
      if(handler != null) handler(this, e);
    }

    protected virtual void RegisterBarsEvents() {
      bars.ItemsAdded += new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsAdded);
      bars.ItemsRemoved += new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
      bars.ItemsReplaced += new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
      bars.CollectionReset += new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
    }

    protected virtual void DeregisterBarsEvents() {
      bars.ItemsAdded -= new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsAdded);
      bars.ItemsRemoved -= new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
      bars.ItemsReplaced -= new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
      bars.CollectionReset -= new CollectionItemsChangedEventHandler<DataBar>(Bars_ItemsChanged);
    }

    private void Bars_ItemsAdded(object sender, CollectionItemsChangedEventArgs<DataBar> e) {
      foreach (var bar in e.Items) {
        bar.ValuePropertyChanged += new PropertyChangedEventHandler(Bars_ValueChanged);
        //bar.ThresholdPropertyChanged += new PropertyChangedEventHandler();
      }
      OnBarsPropertyChanged();
    }

    private void Bars_ItemsChanged(object sender, CollectionItemsChangedEventArgs<DataBar> e) {
      OnBarsPropertyChanged();
    }

    private void Bars_ValueChanged(object sender, PropertyChangedEventArgs e) {
      OnBarValueChanged(e);
    }

    #endregion

    #region helpers
    public static Dictionary<TKey, TValue> CloneDictionary<TKey, TValue>(Dictionary<TKey, TValue> original) where TValue : ICloneable {
      Dictionary<TKey, TValue> ret = new Dictionary<TKey, TValue>(original.Count, original.Comparer);

      foreach (KeyValuePair<TKey, TValue> entry in original) {
        ret.Add(entry.Key, (TValue)entry.Value.Clone());
      }
      return ret;
    }
    #endregion
  }
}