using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;

namespace OpenSEMI.Ctrlib.Controls
{
	public class EditTextBlockAdorner : Adorner
	{
		private readonly VisualCollection _collection;

		private readonly TextBoxEx _textBox;

		private readonly TextBlock _textBlock;

		protected override int VisualChildrenCount => _collection.Count;

		public TextBoxEx TextBox => _textBox;

		public event RoutedEventHandler TextBoxLostFocus
		{
			add
			{
				_textBox.LostFocus += value;
			}
			remove
			{
				_textBox.LostFocus -= value;
			}
		}

		public event KeyEventHandler TextBoxKeyUp
		{
			add
			{
				_textBox.KeyUp += value;
			}
			remove
			{
				_textBox.KeyUp -= value;
			}
		}

		public EditTextBlockAdorner(EditTextBlock adornedElement)
			: base(adornedElement)
		{
			_collection = new VisualCollection(this);
			_textBox = new TextBoxEx();
			_textBlock = adornedElement;
			Binding binding = new Binding("Text")
			{
				Source = adornedElement
			};
			binding.Mode = BindingMode.TwoWay;
			_textBox.SetBinding(System.Windows.Controls.TextBox.TextProperty, binding);
			_textBox.EditBoxMode = adornedElement.EditBoxMode;
			_textBox.AllowEmpty = adornedElement.AllowEmpty;
			_textBox.AllowBackgroundChange = adornedElement.AllowBackgroundChange;
			_textBox.MaxValue = adornedElement.MaxValue;
			_textBox.MinValue = adornedElement.MinValue;
			_textBox.Accuracy = adornedElement.Accuracy;
			_textBox.IsScrollToEnd = adornedElement.IsScrollToEnd;
			binding = new Binding("TextSaved")
			{
				Source = adornedElement
			};
			binding.Mode = BindingMode.TwoWay;
			_textBox.SetBinding(TextBoxEx.TextSavedProperty, binding);
			_textBox.KeyUp += _textBox_KeyUp;
			_collection.Add(_textBox);
		}

		protected override Visual GetVisualChild(int index)
		{
			return _collection[index];
		}

		protected override Size ArrangeOverride(Size finalSize)
		{
			_textBox.Arrange(new Rect(0.0, 0.0, _textBlock.ActualWidth, _textBlock.ActualHeight));
			_textBox.Focus();
			_textBox.ScrollToEnd();
			return finalSize;
		}

		private void _textBox_KeyUp(object sender, KeyEventArgs e)
		{
			if (e.Key == Key.Return)
			{
				_textBox.Text = _textBox.Text.Replace("\r\n", string.Empty);
				_textBox.GetBindingExpression(System.Windows.Controls.TextBox.TextProperty)?.UpdateSource();
				_textBox.GetBindingExpression(TextBoxEx.TextSavedProperty)?.UpdateSource();
			}
		}
	}
}