using Sandbox;

[Title( "HDR Light Animator" )]
public sealed class HDRLightAnimator : Component
{
	[Property] public Curve Curve { get; set; } = new Curve( new Curve.Frame( 0.0f, 0.5f ), new Curve.Frame( 1.0f, 1.0f ) );

	[Property, Range(0,1)] public float Speed { get; set; } = 1.0f;

	Light light;
	float time;
	float seedRand;

	Color cachedLightColor = Color.White;
	protected override void OnEnabled()
	{
		light = Components.Get<Light>( FindMode.EverythingInSelf );
		cachedLightColor = light?.LightColor ?? Color.White;
		seedRand = Random.Shared.Float( 0, 1000 );
	}

	protected override void OnUpdate()
	{
		time = MathF.Sin( Speed * MathF.PI * (Time.Now + seedRand) ).Remap( -1, 1, 0, 1 );
		light.LightColor = cachedLightColor * Curve.Evaluate( time );
	}
}