using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace YKMoon
{
    public class SecondsUpdater : IUpdater
    {
        private event System.Action<float> updateEvent;
        private int lastSeconds = 0;
        /// <summary>
        /// Register update event to this updater.
        /// </summary>
        /// <param name="updateEvent">float deltaTime (newSeconds - lastSeconds). Maybe greater than 1.</param>
        public void Reg(System.Action<float> updateEvent)
        {
            this.updateEvent += updateEvent;
        }
        /// <summary>
        /// Unregister update event in this updater.
        /// </summary>
        /// <param name="updateEvent"></param>
        public void UnReg(System.Action<float> updateEvent)
        {
            this.updateEvent -= updateEvent;
        }
        public void Update(float deltaTime, float unscaledDeltaTime)
        {
            int sec = GerCurrentSeconds();
            if(lastSeconds != sec) {
                updateEvent?.Invoke(sec - lastSeconds);
                lastSeconds = sec;
            }
        }
        public void Clear()
        {
            updateEvent = null;
        }
        private int GerCurrentSeconds()
        {
            return (int)Time.unscaledTime;
        }
    }
}