using Sandbox;

namespace Breakout;

/// <summary>
/// Base class for a timed effect living on the paddle (such as the wide-paddle boost). It runs
/// OnApply when added, then removes itself after Duration seconds, calling OnRemoved on its way out.
/// </summary>
public abstract class PaddleEffect : Component
{
	[Property] public float Duration { get; set; } = 8f;

	protected Paddle Paddle { get; private set; }

	private TimeUntil expires;

	protected override void OnStart()
	{
		Paddle = Components.Get<Paddle>( FindMode.EverythingInSelfAndAncestors );
		if ( Paddle is null )
		{
			Destroy();
			return;
		}

		expires = Duration;
		OnApply();
	}

	protected override void OnUpdate()
	{
		if ( Duration > 0f && expires )
			Destroy();
	}

	protected override void OnDestroy() => OnRemoved();

	/// <summary>
	/// Called once when the effect is added. Override to start the effect.
	/// </summary>
	protected virtual void OnApply() { }

	/// <summary>
	/// Called once when the effect expires or is removed. Override to undo the effect.
	/// </summary>
	protected virtual void OnRemoved() { }
}