using System;

namespace BetterUI.Animations;

/// <summary>
/// A bounce animation that moves the target in a sine wave motion.
/// </summary>
public class BounceAnimation : AnimationBase
{
	/// <summary>
	/// The amplitude of the bounce.
	/// </summary>
	[Property]
	public float Amplitude { get; set; } = 10f;

	/// <summary>
	/// The range of the bounce.
	/// </summary>
	[Property]
	public Vector2 Range { get; set; } = new Vector2( 0f, 10f );

	/// <summary>
	/// The frequency of the bounce.
	/// </summary>
	[Property]
	public float BounceFrequency { get; set; } = 1f;

	protected override void OnAnimate( float t )
	{
		var easedTime = ApplyEasing( NormalizedTime, Easing );

		var range = Range.y - Range.x;
		var value = Range.x + range * (0.5f + 0.5f * MathF.Sin( easedTime * MathF.PI * 2 * BounceFrequency ));

		var x = StartPosition.x + (Axis.x * value);
		var y = StartPosition.y + (Axis.y * value);
		var z = StartPosition.z + (Axis.z * value);

		WorldPosition = new Vector3( x, y, z );
	}
}