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


public class Timer
{
    public static Timer Instance { get; private set; }

    private List<TimerTask> tasks = new List<TimerTask>();  // 存储所有定时任务

    private class TimerTask
    {
        public object target;        // 目标对象 A
        public Action method;        // 方法 B
        public float executeTime;    // 任务执行时间（Time.time + C 毫秒）
    }

    public Timer()
    {
        Instance = this;
    }

    // 注册定时任务
    public void TimerRegister(object A, Action B, float C)
    {
        tasks.Add(new TimerTask
        {
            target = A,
            method = B,
            executeTime = Time.time + C
        });
    }

    public void Update()
    {
        if (tasks.Count == 0) return;

        float currentTime = Time.time;
        for (int i = tasks.Count - 1; i >= 0; i--)
        {
            if (currentTime >= tasks[i].executeTime)
            {
                tasks[i].method?.Invoke(); // 执行方法 B
                tasks.RemoveAt(i);         // 执行完毕后移除
            }
        }
    }
}