chip-gameV3/Assets/Scripts/Gameplay/Timer.cs

using System;
using TMPro;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Serialization;

public class Timer : MonoBehaviour
{
    public event Action TimerEnded;

    public UnityEvent OnTimerEnded;
    [FormerlySerializedAs("TimeLabel")] public TextMeshProUGUI timeLabel;

    [SerializeField, FormerlySerializedAs("restTime")] private float _restTime;
    [SerializeField] private AudioClip _warningSound;

    private bool _processing;
    private bool _recentlyPlayed;
    private float _lastSignalTime;
    private int _lastDisplayedSecond;

    public float RemainingTime => _restTime;
    public bool IsRunning => _processing;

    private void Update()
    {
        if (_processing == false)
            return;

        _restTime -= Time.deltaTime;

        if (_restTime <= 0f)
        {
            _restTime = 0f;
            UiDraw();
            StopTimer();
            TimerEnded?.Invoke();
            OnTimerEnded?.Invoke();
            return;
        }

        UiDraw();
        int rest = Mathf.CeilToInt(_restTime);
        bool warningTime = rest > 0 && (rest % 60 == 0 || rest == 30 || rest < 11);

        if (rest != _lastDisplayedSecond && _recentlyPlayed == false && warningTime)
        {
            if (_warningSound != null)
                SoundManager.instance.PlaySfx(_warningSound);

            _recentlyPlayed = true;
            _lastSignalTime = Time.time;
        }

        _lastDisplayedSecond = rest;

        if (_recentlyPlayed && Time.time - _lastSignalTime >= 1f)
            _recentlyPlayed = false;
    }

    public void SetupTimer(float seconds)
    {
        _processing = false;
        _restTime = Mathf.Max(seconds, 0f);
        _recentlyPlayed = false;
        _lastDisplayedSecond = Mathf.CeilToInt(_restTime);
        UiDraw();
    }

    public void StartTimer()
        => _processing = true;

    public void StopTimer()
        => _processing = false;

    public void StopAndReset()
        => SetupTimer(0f);

    private void UiDraw()
    {
        int totalSeconds = Mathf.CeilToInt(_restTime);
        int minutes = totalSeconds / 60;
        int seconds = totalSeconds % 60;
        timeLabel.text = $"{minutes:00}:{seconds:00}";
    }
}