using System.Windows;
using Microsoft.Xaml.Behaviors;

namespace ShrlAlgoToolkit.Mvvm.Behaviors;

/// <summary>
/// 通过设置属性值，关闭窗口
/// </summary>
/// <example>
/// <c><i:Interaction.Behaviors>
/// <behavior:CloseByPropertyBehavior CloseTrigger = "{Binding CloseTrigger}" />
/// </ i:Interaction.Behaviors>
/// </c>
/// </example>
public class CloseByPropertyBehavior : Behavior<Window>
{
	public static readonly DependencyProperty CloseTriggerProperty = DependencyProperty.Register(
		nameof(CloseTrigger),
		typeof(bool),
		typeof(CloseByPropertyBehavior),
		new PropertyMetadata(false, OnCloseTriggerChanged)
	);

	public bool CloseTrigger
	{
		get => (bool)GetValue(CloseTriggerProperty);
		set => SetValue(CloseTriggerProperty, value);
	}

	private static void OnCloseTriggerChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
	{
		if (d is CloseByPropertyBehavior behavior)
		{
			behavior.OnCloseTriggerChanged();
		}
	}

	private void OnCloseTriggerChanged()
	{
		// when closetrigger is true, close the window
		if (CloseTrigger)
		{
			AssociatedObject.Close();
		}
	}
}