namespace PlanetMeat;

[Group( "Planet Meat - Effects" ), Title( "Fade In" ), Icon( "blur_linear" )]
public sealed class FadeIn : Component
{
	[Property] private float Speed { get; set; } = 2.0f;
	IEnumerable<ModelRenderer> models = null;

	public float Opacity
	{
		get;
		set
		{
			field = value;
			ApplyOpacity();
		}
	} = 0.0f;

	protected override void OnStart()
	{
		base.OnStart();
		models = Components.GetAll<ModelRenderer>( FindMode.EnabledInSelfAndDescendants );
		ApplyOpacity();
	}

	private void ApplyOpacity()
	{
		if ( models is not null )
		{
			foreach ( var m in models )
				m?.Tint = m.Tint.WithAlpha( Opacity );
		}
	}

	protected override void OnUpdate()
	{
		base.OnUpdate();
		if ( Opacity < 1.0f )
		{
			var next = Opacity + Speed * Time.Delta;
			if ( next >= 0.99f )
			{
				Opacity = 1.0f;
				Destroy();
			}
			else
			{
				Opacity = next;
			}
		}
	}
}