HighGroundRoyaleNetcode/Assets/Scripts/Gameplay/GameplayObjects/Character/ScreenHit.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class ScreenHit : MonoBehaviour
{
    public static ScreenHit Instance { get; private set; } // Singleton instance

    private Image hitImage;
    private Coroutine fadeCoroutine;
    public float fadeDuration = 0.3f; // Time to fade in and out

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
        }
        else
        {
            Destroy(gameObject);
            return;
        }

        hitImage = GetComponent<Image>();

        if (hitImage == null)
        {
            Debug.LogError("[ScreenHit] No Image component found! Make sure it's attached to a UI Image.");
        }

        // Start fully transparent
        Color color = hitImage.color;
        color.a = 0;
        hitImage.color = color;
    }

    public void ShowHitEffect()
    {
        if (fadeCoroutine != null)
        {
            StopCoroutine(fadeCoroutine);
        }
        fadeCoroutine = StartCoroutine(FadeEffect());
    }

    private IEnumerator FadeEffect()
    {
        float halfDuration = fadeDuration / 2f;
        Color color = hitImage.color;

        // Fade in
        float elapsed = 0f;
        while (elapsed < halfDuration)
        {
            color.a = Mathf.Lerp(0, 1, elapsed / halfDuration);
            hitImage.color = color;
            elapsed += Time.deltaTime;
            yield return null;
        }

        // Fade out
        elapsed = 0f;
        while (elapsed < halfDuration)
        {
            color.a = Mathf.Lerp(1, 0, elapsed / halfDuration);
            hitImage.color = color;
            elapsed += Time.deltaTime;
            yield return null;
        }

        color.a = 0; // Fully transparent
        hitImage.color = color;
    }
}