using Engine.Core;

namespace Engine.Systems.Tween;

public static class TweenCamera2DExtensions
{
    private static readonly BoxedPool<float> boxedFloatPool = new(2);

    public static ITween TweenZoom(this ICamera2D camera2D, ITweenManager tweenManager, float duration, float targetZoom)
    {
        Boxed<float> boxedInitial = boxedFloatPool.Get(camera2D.Zoom);
        Boxed<float> boxedTarget = boxedFloatPool.Get(targetZoom);

        ITween tween = tweenManager.StartTween(duration, t => camera2D.Zoom = boxedInitial.Value.Lerp(boxedTarget.Value, t));

        tween.OnComplete(() =>
        {
            boxedFloatPool.Return(boxedInitial);
            boxedFloatPool.Return(boxedTarget);
        });

        return tween;
    }
}