#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 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 System.Windows.Forms;
using HeuristicLab.Collections;
using HeuristicLab.Core;
using HeuristicLab.MainForm;

namespace HeuristicLab.ItemTreeViews.Views {
  [View("NamedItemCollection Tree View")]
  [Content(typeof(NamedItemCollection<>), false)]
  public partial class NamedItemCollectionTreeView<T> : ItemCollectionTreeView<T> where T : class, INamedItem {
    public new IKeyedItemCollection<string, T> Content
    {
      get { return (IKeyedItemCollection<string, T>)base.Content; }
      set { base.Content = value; }
    }

    public NamedItemCollectionTreeView() {
      InitializeComponent();
    }

    protected override void DeregisterContentEvents() {
      Content.ItemsReplaced -= Content_ItemsReplaced;
      base.DeregisterContentEvents();
    }
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.ItemsReplaced += Content_ItemsReplaced;
    }

    protected override void OnContentChanged() {
      string selectedName = null;
      if ((ItemsTreeView.SelectedNode != null ? ItemsTreeView.SelectedNode.Tag as T : null) is T)
        selectedName = ((T)ItemsTreeView.SelectedNode.Tag).Name;

      base.OnContentChanged();

      if (selectedName == null) return;
      foreach (TreeNode item in ItemsTreeView.Nodes)
        if ((item.Tag != null) && ((T)item.Tag).Name.Equals(selectedName))
          ItemsTreeView.SelectedNode = item;
    }

    protected override T CreateItem() {
      T item = base.CreateItem();
      if (item != null) {
        item.Name = GetUniqueName(item.Name);
      }
      return item;
    }

    protected override TreeNode CreateTreeViewNode(T item) {
      var listViewItem = base.CreateTreeViewNode(item);
      if (!string.IsNullOrEmpty(item != null ? item.Description : null)) {
        listViewItem.ToolTipText = item.ItemName + ": " + item.Description;
      }
      return listViewItem;
    }
    protected override void UpdateTreeViewItemText(TreeNode treeViewNode) {
      base.UpdateTreeViewItemText(treeViewNode);
      T item = treeViewNode.Tag as T;
      if (!string.IsNullOrEmpty(item != null ? item.Description : null)) {
        treeViewNode.ToolTipText = item.ItemName + ": " + item.Description;
      }
    }

    #region Content Events
    protected virtual void Content_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<T> e) {
      if (InvokeRequired)
        Invoke(new CollectionItemsChangedEventHandler<T>(Content_ItemsReplaced), sender, e);
      else {
        ItemsTreeView.BeginUpdate();
        foreach (T item in e.Items)
          UpdateTreeViewItemText(GetTreeNodeForItem(item));
        ItemsTreeView.EndUpdate();
      }
    }
    #endregion

    #region Helpers
    protected virtual string GetUniqueName(string originalName) {
      if (!Content.ContainsKey(originalName))
        return originalName;

      string name;
      int index = 0;
      do {
        index++;
        name = originalName + index;
      } while (Content.ContainsKey(name));
      return name;

    }
    #endregion
  }
}