Echo/Assets/_Project/Scripts/UI/PressToContinue.cs

using UnityEngine;
using Core.SceneLoading;
using UnityEngine.InputSystem;

using DG.Tweening;
using Michsky.UI.Reach;

public class PressToContinue : MonoBehaviour
{
    [SerializeField] FeedNotification notification;
    [SerializeField] CanvasGroup notificationCanvasGroup;
    [SerializeField, Range(0f, 1f)] float minAlpha = 0.25f;
    [SerializeField, Range(0f, 1f)] float maxAlpha = 1f;
    [SerializeField] float blinkDuration = 1.2f;
    [SerializeField] float blinkStartDelay = 1f;

    Tween blinkTween;
    Tween blinkDelayTween;
    bool isShown;

    void Awake()
    {
        if (notification == null)
        {
            notification = FindObjectOfType<FeedNotification>(true);
        }

        if (notificationCanvasGroup == null && notification != null)
        {
            notificationCanvasGroup = notification.GetComponent<CanvasGroup>();
            if (notificationCanvasGroup == null)
            {
                notificationCanvasGroup = notification.gameObject.AddComponent<CanvasGroup>();
            }
        }
    }

    void Start()
    {
        isShown = false;

        if (StartupSceneLoader.Instance != null)
        {
            StartupSceneLoader.Instance.BeginLoad();
        }
    }

    void LateUpdate()
    {
        if (StartupSceneLoader.Instance == null) return;

        if (!isShown && StartupSceneLoader.Instance.IsLoadComplete())
        {
            ShowNotification();
        }

        if (!isShown) return;
        if (Keyboard.current == null) return;
        if (!Keyboard.current.anyKey.wasPressedThisFrame) return;

        StartupSceneLoader.Instance.ActivateLoadedScene();
    }

    void OnDisable()
    {
        StopBlink();
    }

    void ShowNotification()
    {
        if (notification == null) return;

        notification.defaultState = FeedNotification.DefaultState.Expanded;
        notification.minimizeAfter = 0f;
        isShown = true;

        if (notificationCanvasGroup != null)
        {
            notificationCanvasGroup.alpha = maxAlpha;
        }

        StopBlink();
        notification.ExpandNotification();
        StartBlinkAfterDelay();
    }

    void StartBlinkAfterDelay()
    {
        if (notificationCanvasGroup == null) return;

        if (blinkDelayTween != null && blinkDelayTween.IsActive())
        {
            blinkDelayTween.Kill();
        }

        blinkDelayTween = DOVirtual.DelayedCall(blinkStartDelay, StartBlink).SetUpdate(true);
    }

    void StartBlink()
    {
        if (notificationCanvasGroup == null) return;

        if (blinkTween != null && blinkTween.IsActive())
        {
            blinkTween.Kill();
        }

        notificationCanvasGroup.alpha = maxAlpha;
        blinkTween = DOTween
            .To(() => notificationCanvasGroup.alpha, a => notificationCanvasGroup.alpha = a, minAlpha, blinkDuration)
            .SetEase(Ease.InOutSine)
            .SetLoops(-1, LoopType.Yoyo)
            .SetUpdate(true);
    }

    void StopBlink()
    {
        if (blinkDelayTween != null && blinkDelayTween.IsActive())
        {
            blinkDelayTween.Kill();
        }
        blinkDelayTween = null;

        if (blinkTween != null && blinkTween.IsActive())
        {
            blinkTween.Kill();
        }
        blinkTween = null;
    }
}