#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

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

namespace HeuristicLab.Networks.Programmable {
  [Item("ProgrammableNetwork", "Abstract base class for programmable networks.")]
  [StorableClass]
  public abstract class ProgrammableNetwork : ProgrammableNode, IProgrammableNetwork, IStorableContent {
    public static new Image StaticItemImage {
      get { return HeuristicLab.Common.Resources.VSImageLibrary.Module; }
    }

    #region IStorableContent Members
    public string Filename { get; set; }
    #endregion

    #region Network Members
    [Storable]
    private NodeCollection nodes;
    protected NodeCollection Nodes {
      get { return CompiledNetworkItem.Nodes; }
    }
    private ReadOnlyKeyedItemCollection<string, INode> readOnlyNodes;
    IKeyedItemCollection<string, INode> INetwork.Nodes {
      get {
        if (readOnlyNodes == null) readOnlyNodes = Nodes.AsReadOnly();
        return readOnlyNodes;
      }
    }
    #endregion

    protected override string CodeTemplate {
      get { return CodeResources.ProgrammableNetworkCode; }
    }

    new protected CompiledProgrammableNetwork CompiledNetworkItem {
      get { return (CompiledProgrammableNetwork)base.CompiledNetworkItem; }
    }

    [StorableConstructor]
    protected ProgrammableNetwork(bool deserializing) : base(deserializing) { }
    protected ProgrammableNetwork(ProgrammableNetwork original, Cloner cloner)
      : base(original, cloner) {
      // nodes are cloned in CompiledProgrammableNetwork
      readOnlyNodes = null;
    }
    protected ProgrammableNetwork()
      : base("ProgrammableNetwork") {
      nodes = new NodeCollection();
      readOnlyNodes = null;
    }
    protected ProgrammableNetwork(string name)
      : base(name) {
      nodes = new NodeCollection();
      readOnlyNodes = null;
    }
    protected ProgrammableNetwork(string name, string description)
      : base(name, description) {
      nodes = new NodeCollection();
      readOnlyNodes = null;
    }

    #region CompiledProgrammableNetwork
    [Item("CompiledProgrammableNetwork", "Abstract base class for compiled programmable networks.")]
    public abstract class CompiledProgrammableNetwork : CompiledProgrammableNode, INetwork {
      public static new Image StaticItemImage {
        get { return HeuristicLab.Common.Resources.VSImageLibrary.Module; }
      }

      #region Network Members
      public override IEnumerable<INetworkItem> Children {
        get { return base.Children.Concat(Nodes.AsEnumerable<INetworkItem>()); }
      }

      public NodeCollection Nodes {
        get { return Context.nodes; }
      }
      IKeyedItemCollection<string, INode> INetwork.Nodes {
        get { return Nodes; }
      }
      #endregion

      new protected ProgrammableNetwork Context {
        get { return (ProgrammableNetwork)base.Context; }
      }

      protected CompiledProgrammableNetwork(CompiledProgrammableNetwork original, Cloner cloner)
        : base(original, cloner) {
        Context.nodes = cloner.Clone(original.Context.nodes);
      }
      protected CompiledProgrammableNetwork(ProgrammableNetwork context)
        : base(context) {
      }

      public override void Initialize() {
        base.Initialize();
        Nodes.Clear();
      }

      #region Events
      public override void RegisterEvents() {
        base.RegisterEvents();
        Nodes.ItemsAdded += Nodes_ItemsAdded;
        Nodes.ItemsRemoved += Nodes_ItemsRemoved;
        Nodes.ItemsReplaced += Nodes_ItemsReplaced;
        Nodes.CollectionReset += Nodes_CollectionReset;
        foreach (var n in Nodes.ToList())
          n.Parent = this;
      }
      public override void DeregisterEvents() {
        foreach (var n in Nodes)
          n.Parent = null;
        Nodes.ItemsAdded -= Nodes_ItemsAdded;
        Nodes.ItemsRemoved -= Nodes_ItemsRemoved;
        Nodes.ItemsReplaced -= Nodes_ItemsReplaced;
        Nodes.CollectionReset -= Nodes_CollectionReset;
        base.DeregisterEvents();
      }
      protected virtual void Nodes_ItemsAdded(object sender, Collections.CollectionItemsChangedEventArgs<INode> e) {
        foreach (var n in e.Items)
          n.Parent = this;
      }
      protected virtual void Nodes_ItemsRemoved(object sender, Collections.CollectionItemsChangedEventArgs<INode> e) {
        foreach (var n in e.Items)
          n.Parent = null;
      }
      protected virtual void Nodes_ItemsReplaced(object sender, Collections.CollectionItemsChangedEventArgs<INode> e) {
        foreach (var n in e.OldItems)
          n.Parent = null;
        foreach (var n in e.Items)
          n.Parent = this;
      }
      protected virtual void Nodes_CollectionReset(object sender, Collections.CollectionItemsChangedEventArgs<INode> e) {
        foreach (var n in e.OldItems)
          n.Parent = null;
        foreach (var n in e.Items)
          n.Parent = this;
      }
      #endregion
    }
    #endregion
  }
}