KitchenChaos/Assets/Scripts/UI/ProgressBarUI.cs

using UnityEngine;
using UnityEngine.UI;
using static StoveCounter;

namespace UI {
    public class ProgressBarUI : MonoBehaviour {
        [SerializeField] private GameObject hasProgressGameObject;
        [SerializeField] private Image barImage;

        private IHasProgress hasProgress;

        private void Start() {
            if (!hasProgressGameObject.TryGetComponent(out hasProgress))
                Debug.LogError(
                    $"Game Object {hasProgressGameObject} does not have a component that implements IHasProgress!");
            else
                hasProgress.OnProgressChanged += HasProgress_OnProgressChanged;

            barImage.fillAmount = 0f;
            Hide();
        }

        private void HasProgress_OnProgressChanged(object sender, IHasProgress.ProgressChangedEventArgs e) {
            barImage.fillAmount = e.ProgressNormalized;

            barImage.color = e.State == State.Fried
                ? Color.Lerp(Color.green, Color.red, e.ProgressNormalized)
                : Color.Lerp(Color.blue, Color.green, e.ProgressNormalized);

            if (e.ProgressNormalized is 0f or 1f)
                Hide();
            else
                Show();
        }

        private void Show() {
            gameObject.SetActive(true);
        }

        private void Hide() {
            gameObject.SetActive(false);
        }
    }
}