using System;
using System.ComponentModel.Design;
using System.Collections.ObjectModel;

namespace Aga.Controls.Tree.NodeControls
{
	public class NodeControlsCollection : Collection<NodeControl>
	{
		private TreeViewAdv _tree;

		public NodeControlsCollection(TreeViewAdv tree)
		{
			_tree = tree;
		}

		protected override void ClearItems()
		{
			_tree.BeginUpdate();
		
            try
			{
				while (this.Count != 0)
					this.RemoveAt(this.Count - 1);
			}
			finally
			{
				_tree.EndUpdate();
			}
		}

		protected override void InsertItem(int index, NodeControl item)
		{
			if (item == null)
				throw new ArgumentNullException("item");

		    if (item.Parent == this._tree)
		        return;

		    if (item.Parent != null)
		    {
		        item.Parent.NodeControls.Remove(item);
		    }
				
		    base.InsertItem(index, item);
				
		    item.AssignParent(this._tree);
				
		    this._tree.FullUpdate();
		}

		protected override void RemoveItem(int index)
		{
			NodeControl value = this[index];
			
            value.AssignParent(null);
			
            base.RemoveItem(index);
			
            _tree.FullUpdate();
		}

		protected override void SetItem(int index, NodeControl item)
		{
			if (item == null)
				throw new ArgumentNullException("item");

			_tree.BeginUpdate();

			try
			{
				RemoveAt(index);
				InsertItem(index, item);
			}
			finally
			{
				_tree.EndUpdate();
			}
		}
	}

	internal class NodeControlCollectionEditor : CollectionEditor
	{
		private Type[] _types;

		public NodeControlCollectionEditor(Type type)
			: base(type)
		{
			_types = new[] 
            { 
                typeof(NodeTextBox), 
                typeof(NodeIntegerTextBox), 
                typeof(NodeIcon),
            };
		}

		protected override Type[] CreateNewItemTypes()
		{
			return _types;
		}
	}
}