using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;

namespace EmbyToolbox.Behaviors;

/// <summary>Всплывает <see cref="Button.ContextMenu"/> по левому клику вместо ПКМ (split-menu кнопка).</summary>
public static class ContextMenuOpenOnButtonClickBehavior
{
    public static readonly DependencyProperty IsEnabledProperty = DependencyProperty.RegisterAttached(
        "IsEnabled",
        typeof(bool),
        typeof(ContextMenuOpenOnButtonClickBehavior),
        new PropertyMetadata(false, OnIsEnabledChanged));

    public static void SetIsEnabled(Button obj, bool value) => obj.SetValue(IsEnabledProperty, value);

    public static bool GetIsEnabled(Button obj) => (bool)obj.GetValue(IsEnabledProperty);

    private static void OnIsEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is not Button btn)
        {
            return;
        }

        btn.Click -= OnButtonClick;

        if (e.NewValue is true)
        {
            btn.Click += OnButtonClick;
        }
    }

    private static void OnButtonClick(object sender, RoutedEventArgs e)
    {
        if (sender is not Button btn || btn.ContextMenu is not ContextMenu menu)
        {
            return;
        }

        menu.PlacementTarget = btn;
        menu.Placement = PlacementMode.Bottom;
        menu.IsOpen = true;
        e.Handled = true;
    }
}