Pong/Assets/Scripts/Game/Modification.cs

using System;
using System.Collections;
using System.Collections.Generic;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.UIElements;

namespace Game {

	public enum ModType { Nerf, Buff }
	public enum ModEffect { Speed, Border }

	public class ActiveModification {
		public ModificationProperties Properties { get; set; }

		public IEnumerator Process(VisualElement panel, List<ActiveModification> modifications) {
			modifications.Add(this);
			VisualElement element = GameUI.AddModification(panel, this);

			float doNothingTime = Properties.activeDuration * 0.7f;
			float animateTime = Properties.activeDuration * 0.3f;

			yield return new WaitForSeconds(doNothingTime);

			float current = 0;
			while (current < animateTime) {
				current += Time.deltaTime;
				element.style.opacity = new StyleFloat(1 - current / animateTime);
				yield return null;
			}

			element.RemoveFromHierarchy();
			modifications.Remove(this);
		}
		
		
	}

	public class Modification : NetworkBehaviour {

		public ModificationProperties Properties { get; set; }

		private IEnumerator Start() {
			gameObject.AddComponent<SpriteRenderer>().sprite = Properties.image;
			yield return new WaitForSeconds(Properties.pickupDuration);
			Destroy(gameObject);
		}

		private void OnTriggerEnter2D(Collider2D other) {
			Player p = other.GetComponent<Ball>().LastContactPlayer;
			if (p != null) {
				Destroy(gameObject);
				ActiveModification mod = new() {Properties = Properties};
				p.StartCoroutine(mod.Process(p.Panel, p.Modifications));
			}
		}
	}
}