using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using Aga.Controls.Tree.NodeControls;
using System.Drawing;

namespace Aga.Controls.Tree
{
	partial class TreeViewAdv
	{
		private TreeNodeAdv _editingNode;

		public EditableControl CurrentEditorOwner { get; private set; }
		public Control CurrentEditor { get; private set; }

		public void HideEditor()
		{
			if (CurrentEditorOwner != null)
				CurrentEditorOwner.EndEdit(false);
		}

		internal void DisplayEditor(Control editor, EditableControl owner)
		{
			if (editor == null || owner == null || CurrentNode == null)
				throw new ArgumentNullException();

			HideEditor(false);

			CurrentEditor = editor;
			CurrentEditorOwner = owner;
			_editingNode = CurrentNode;

			editor.Validating += EditorValidating;
			UpdateEditorBounds();
			UpdateView();
			editor.Parent = this;
			editor.Focus();
			owner.UpdateEditor(editor);
		}

		internal bool HideEditor(bool applyChanges)
		{
			if (CurrentEditor != null)
			{
				if (applyChanges)
				{
					if (!ApplyChanges())
						return false;
				}

				//Check once more if editor was closed in ApplyChanges
				if (CurrentEditor != null)
				{
					CurrentEditor.Validating -= EditorValidating;
					CurrentEditorOwner.DoDisposeEditor(CurrentEditor);

					CurrentEditor.Parent = null;
					CurrentEditor.Dispose();

					CurrentEditor = null;
					CurrentEditorOwner = null;
					_editingNode = null;
				}
			}
			return true;
		}

		private bool ApplyChanges()
		{
			try
			{
				CurrentEditorOwner.ApplyChanges(_editingNode, CurrentEditor);
				_errorProvider.Clear();
				return true;
			}
			catch (ArgumentException ex)
			{
				_errorProvider.SetError(CurrentEditor, ex.Message);
				/*CurrentEditor.Validating -= EditorValidating;
				MessageBox.Show(this, ex.Message, "Value is not valid", MessageBoxButtons.OK, MessageBoxIcon.Warning);
				CurrentEditor.Focus();
				CurrentEditor.Validating += EditorValidating;*/
				return false;
			}
		}

		void EditorValidating(object sender, System.ComponentModel.CancelEventArgs e)
		{
			e.Cancel = !ApplyChanges();
		}

		public void UpdateEditorBounds()
		{
			if (CurrentEditor != null)
			{
				EditorContext context = new EditorContext();
				context.Owner = CurrentEditorOwner;
				context.CurrentNode = CurrentNode;
				context.Editor = CurrentEditor;
				context.DrawContext = _measureContext;
				SetEditorBounds(context);
			}
		}

		private void SetEditorBounds(EditorContext context)
		{
			foreach (NodeControlInfo info in GetNodeControls(context.CurrentNode))
			{
				if (context.Owner == info.Control && info.Control is EditableControl)
				{
					Point p = info.Bounds.Location;
					p.X += info.Control.LeftMargin;
					p.X -= OffsetX;
					p.Y -= (_rowLayout.GetRowBounds(FirstVisibleRow).Y - ColumnHeaderHeight);
					int width = DisplayRectangle.Width - p.X;
					if (UseColumns && info.Control.ParentColumn != null && Columns.Contains(info.Control.ParentColumn))
					{
						Rectangle rect = GetColumnBounds(info.Control.ParentColumn.Index);
						width = rect.Right - OffsetX - p.X;
					}
					context.Bounds = new Rectangle(p.X, p.Y, width, info.Bounds.Height);
					((EditableControl)info.Control).SetEditorBounds(context);
					return;
				}
			}
		}

		private Rectangle GetColumnBounds(int column)
		{
			int x = 0;
			for (int i = 0; i < Columns.Count; i++)
			{
				if (Columns[i].IsVisible)
				{
					if (i < column)
						x += Columns[i].Width;
					else
						return new Rectangle(x, 0, Columns[i].Width, 0);
				}
			}
			return Rectangle.Empty;
		}
	}
}