Carrasco/Assets/CountDownSlider.cs

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

[RequireComponent(typeof(Slider))]
public class CountdownSliderRealtime : MonoBehaviour
{
    [Header("Config")]
    [Min(0.01f)] public float countdownSeconds = 5f;
    public bool autoStartOnEnable = true;
    public GameObject destroyTarget;            // Si es null, se destruye este GameObject

    [Header("Refs")]
    public Slider slider;                       // Si es null, se busca en este GO o en hijos

    [Header("Events")]
    public UnityEvent onCountdownFinished;      // Opcional: acciones al terminar

    private Coroutine running;

    void Awake()
    {
        if (slider == null)
        {
            slider = GetComponent<Slider>();
            if (slider == null)
                slider = GetComponentInChildren<Slider>(true);
        }

        if (destroyTarget == null)
            destroyTarget = gameObject;
    }

    void OnEnable()
    {
        if (slider == null)
        {
            Debug.LogError("[CountdownSliderRealtime] No se encontró Slider.");
            return;
        }

        slider.maxValue = countdownSeconds;
        slider.value = countdownSeconds;

        if (autoStartOnEnable)
            StartCountdown(countdownSeconds);
    }

    void OnDisable()
    {
        if (running != null)
        {
            StopCoroutine(running);
            running = null;
        }
    }

    /// <summary>
    /// Inicia o reinicia el conteo con los segundos indicados (tiempo real).
    /// </summary>
    public void StartCountdown(float seconds)
    {
        countdownSeconds = Mathf.Max(0.01f, seconds);
        if (running != null) StopCoroutine(running);
        running = StartCoroutine(CountdownRoutine(countdownSeconds));
    }

    private IEnumerator CountdownRoutine(float seconds)
    {
        float endTime = Time.realtimeSinceStartup + seconds;

        // Asegurar valores iniciales
        slider.maxValue = seconds;
        slider.value = seconds;

        while (true)
        {
            float remaining = endTime - Time.realtimeSinceStartup;
            if (remaining <= 0f) break;

            slider.value = remaining;
            yield return null; // Actualiza cada frame, independiente de timeScale
        }

        slider.value = 0f;

        // Evento al terminar
        if (onCountdownFinished != null)
            onCountdownFinished.Invoke();

        // Destruir si corresponde
        if (destroyTarget != null)
            Destroy(destroyTarget);

        running = null;
    }
}