using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using UnityEngine.UI;

public class DownAddress : MonoBehaviour
{
    public string preloadLabel = "XJMH";
    public Image image;
    public void XZ()
    {
        StartCoroutine(Starta());
    }
    IEnumerator Starta()
    {
        // 1. 先检查需要下载的大小
        AsyncOperationHandle<long> checkSizeHandle = Addressables.GetDownloadSizeAsync(preloadLabel);
        yield return checkSizeHandle;

        if (checkSizeHandle.Result > 0)
        {
            Debug.Log($"需要下载 {checkSizeHandle.Result} 字节");

            // 2. 开始下载
            AsyncOperationHandle downloadHandle = Addressables.DownloadDependenciesAsync(preloadLabel, true); // autoReleaseHandle 设为 true

            // 等待下载完成，并可选择性地更新进度
            while (!downloadHandle.IsDone)
            {
                // 使用 GetDownloadStatus() 可以获取更精确的下载状态
                DownloadStatus status = downloadHandle.GetDownloadStatus();
                float percent = status.Percent * 100;
                Debug.Log($"下载进度: {percent:F1}%");
                image.fillAmount =1-status.Percent;
                yield return null;
            }

            // 3. 检查结果
            if (downloadHandle.Status == AsyncOperationStatus.Succeeded)
            {
                Debug.Log("预下载完成！");
            }
            else
            {
                Debug.LogError("预下载失败！");
            }

            // 因为我们传入了 autoReleaseHandle = true，所以不需要手动调用 downloadHandle.Release()
        }
        else
        {
            Debug.Log("所有资源已是最新，无需下载。");
        }

        // 记得释放检查大小的操作句柄
        Addressables.Release(checkSizeHandle);
    }
}