#nullable disable
using System;
using System.Windows.Input;
using Microsoft.Maui.Controls.Internals;
 
namespace Microsoft.Maui.Controls
{
	static class ButtonElement
	{
		/// <summary>
		/// The backing store for the <see cref="ICommandElement.Command" /> bindable property.
		/// </summary>
		public static readonly BindableProperty CommandProperty = BindableProperty.Create(
			nameof(IButtonElement.Command), typeof(ICommand), typeof(IButtonElement), null,
			propertyChanging: CommandElement.OnCommandChanging, propertyChanged: CommandElement.OnCommandChanged);
 
		/// <summary>
		/// The backing store for the <see cref="ICommandElement.CommandParameter" /> bindable property.
		/// </summary>
		public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create(
			nameof(IButtonElement.CommandParameter), typeof(object), typeof(IButtonElement), null,
			propertyChanged: CommandElement.OnCommandParameterChanged);
 
		/// <summary>
		/// The string identifier for the pressed visual state of this control.
		/// </summary>
		public const string PressedVisualState = "Pressed";
 
		/// <summary>
		/// A method to signal that this element was clicked/tapped.
		/// By calling this, the <see cref="ICommandElement.Command"/> and clicked events are triggered.
		/// </summary>
		/// <param name="visualElement">The element that was interacted with.</param>
		/// <param name="ButtonElementManager">The button element implementation to trigger the commands and events on.</param>
		public static void ElementClicked(VisualElement visualElement, IButtonElement ButtonElementManager)
		{
			if (visualElement.IsEnabled == true)
			{
				ButtonElementManager.Command?.Execute(ButtonElementManager.CommandParameter);
				ButtonElementManager.PropagateUpClicked();
			}
		}
 
		/// <summary>
		/// A method to signal that this element was pressed.
		/// By calling this, <see cref="IButtonElement.IsPressed"/> is set to <see langword="true"/>, the visual state is changed and events are triggered.
		/// </summary>
		/// <param name="visualElement">The element that was interacted with.</param>
		/// <param name="ButtonElementManager">The button element implementation to trigger the commands and events on.</param>
		public static void ElementPressed(VisualElement visualElement, IButtonElement ButtonElementManager)
		{
			if (visualElement.IsEnabled == true)
			{
				ButtonElementManager.SetIsPressed(true);
				visualElement.ChangeVisualStateInternal();
				ButtonElementManager.PropagateUpPressed();
			}
		}
 
		/// <summary>
		/// A method to signal that this element was released.
		/// By calling this, <see cref="IButtonElement.IsPressed"/> is set to <see langword="false"/>, the visual state is changed and events are triggered.
		/// </summary>
		/// <param name="visualElement">The element that was interacted with.</param>
		/// <param name="ButtonElementManager">The button element implementation to trigger the commands and events on.</param>
		public static void ElementReleased(VisualElement visualElement, IButtonElement ButtonElementManager)
		{
			// Even if the button is disabled, we still want to remove the Pressed state;
			// the button may have been disabled by the the pressing action
			ButtonElementManager.SetIsPressed(false);
			visualElement.ChangeVisualStateInternal();
			ButtonElementManager.PropagateUpReleased();
		}
	}
}