using System;
using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using ZXKFramework;

namespace YiLiao.XinFeiTingZhen
{
    public class CountdownPanel : UIBase
    {
        [Tooltip("倒计时总时长（秒）")]
        public float duration = 20f;

        [Tooltip("绑定带有Filled属性的Image组件")]
        public Image countdownImage;

        [Tooltip("绑定显示时间的Text组件")]
        public Text timeText;

        // 用于存储协程引用，以便随时停止
        private Coroutine countdownCoroutine;
        public Action callBack;

        public override string GroupName => "CountdownPanel";
        public override string Name => "CountdownPanel";

        /// <summary>
        /// 启动倒计时
        /// </summary>
        public void StartCountdown(Action callBack)
        {
            this.callBack = callBack;

            // 如果已经有倒计时在运行，先停止旧的
            if (countdownCoroutine != null)
            {
                StopCoroutine(countdownCoroutine);
            }

            // 启动新的协程
            countdownCoroutine = StartCoroutine(CountdownRoutine());
        }

        /// <summary>
        /// 关闭/停止倒计时
        /// </summary>
        public void StopCountdown()
        {
            if (countdownCoroutine != null)
            {
                StopCoroutine(countdownCoroutine);
                countdownCoroutine = null;
            }
            Debug.Log("倒计时已关闭");
        }

        /// <summary>
        /// 倒计时协程
        /// </summary>
        private IEnumerator CountdownRoutine()
        {
            float elapsedTime = 0f;

            // 循环直到时间耗尽
            while (elapsedTime < duration)
            {
                // 计算剩余时间
                float remainingTime = duration - elapsedTime;

                // 更新UI
                UpdateTimerUI(remainingTime);

                // 累加时间
                elapsedTime += Time.deltaTime;

                // 等待一帧
                yield return null;
            }

            // 倒计时结束，确保显示为0
            UpdateTimerUI(0);
            Debug.Log("倒计时结束！");
            callBack?.Invoke();

            // 协程结束，清空引用
            countdownCoroutine = null;
        }

        void UpdateTimerUI(float time = 0)
        {
            // 防止除以0或负数导致的UI错误
            float fill = duration > 0 ? time / duration : 0;
            countdownImage.fillAmount = fill;

            int seconds = Mathf.CeilToInt(time);
            timeText.text = seconds.ToString() + "s";
        }

        public override void Hide()
        {
            base.Hide();
            StopCountdown();
        }
    }
}