namespace Machines.Systems;

/// <summary>
/// Manages active camera noise effects. Call <see cref="Update"/> then <see cref="Apply"/> each frame.
/// </summary>
public static class CameraNoiseSystem
{
	private static readonly List<BaseCameraNoise> _all = new();

	/// <summary>
	/// Register a noise effect. Called automatically by <see cref="BaseCameraNoise"/> constructor.
	/// </summary>
	public static void Add( BaseCameraNoise noise )
	{
		_all.Add( noise );
	}

	/// <summary>
	/// Tick all active effects and prune finished ones. Call once per frame before <see cref="Apply"/>.
	/// </summary>
	public static void Update()
	{
		foreach ( var effect in _all )
		{
			effect.Tick();
		}

		_all.RemoveAll( x => x.IsDone );
	}

	/// <summary>
	/// Apply all active effects to the given camera rotation. Returns the modified rotation.
	/// </summary>
	public static Rotation Apply( Rotation rotation )
	{
		foreach ( var effect in _all )
		{
			rotation = effect.ModifyRotation( rotation );
		}

		return rotation;
	}
}