Unity_Utils/Core/Timer.cs

using UnityEngine;
using UnityEngine.Events;

namespace Core
{
    public class Timer : MonoBehaviour
    {
        public UnityAction onTimeOver;
    
        public bool IsRunning { get; private set; }

        public float CurrentTime { get; private set; }

        [SerializeField] private float _startingTime = 600;
        [SerializeField] private bool _isCountDown;

        private void Start()
        {
            CurrentTime = _startingTime;
        }

        private void Update()
        {
            if (IsRunning)
            {
                if (_isCountDown)
                {
                    if (CurrentTime > 0)
                    {
                        CurrentTime -= Time.deltaTime;
                    }
                    else
                    {
                        CurrentTime = 0;
                        IsRunning = false;
                        onTimeOver?.Invoke();
                    }
                }
                else
                {
                    CurrentTime += Time.deltaTime;
                }
            }
        }

        public void StartTimer() => IsRunning = true;
        public void StopTimer() => IsRunning = false;
    }
}