using System;
using System.Collections;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using UnityEngine;
using Aliyun.OSS;
using Aliyun.OSS.Common;
using Base.Helper;

// AlibabaCloud.SDK.OSS.V2

public class AliyunOSSClient : MonoBehaviour
{
    [Header("OSS配置")] public string accessKeyId = "LTAI5t9AcXJm2BXwzLTie8Wa";
    public string accessKeySecret = "RJhANJfNL7Xr8EmEZfMR12ED5nIp8c";
    public string endpoint = "oss-cn-hongkong.aliyuncs.com";
    public string bucketName = "dev-bucket-plugcustom";
    public string objectKeyPrefix = "KioskUploads/FujifilmKiosk/";

    private OssClient _ossClient;
    private static AliyunOSSClient _instance;

    public static AliyunOSSClient Instance
    {
        get
        {
            if (_instance == null)
            {
                _instance = FindObjectOfType<AliyunOSSClient>();
                if (_instance == null)
                {
                    GameObject obj = new GameObject("AliyunOSSClient");
                    _instance = obj.AddComponent<AliyunOSSClient>();
                    DontDestroyOnLoad(obj);
                }
            }

            return _instance;
        }
    }

    private void Awake()
    {
        try
        {
            // 初始化OSS客户端
            _ossClient = new OssClient(endpoint, accessKeyId, accessKeySecret);
            Debug.Log("OSS客户端初始化成功");
        }
        catch (Exception ex)
        {
            Debug.LogError($"OSS客户端初始化失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 上传文件到OSS
    /// </summary>
    public void UploadFile(string localFilePath, Action<string, string> onComplete,
        Action<long, long> onProgress = null)
    {
        if (_ossClient == null)
        {
            onComplete?.Invoke(null, "OSS客户端未初始化");
            return;
        }

        string fileName = Path.GetFileName(localFilePath);
        var bytes = File.ReadAllBytes(localFilePath);
        UploadFile(bytes, fileName, onComplete, onProgress);
    }

    public void UploadFile(byte[] bytes, string fileName, Action<string, string> onComplete,
        Action<long, long> onProgress = null)
    {
        StartCoroutine(UploadFileAsync(bytes, fileName, onComplete, onProgress));
    }

// 递归上传目录
    private void UploadDirectory(OssClient client, string ossDirectory, string localDirectory, string ossRelativePath)
    {
        // 上传目录下的所有文件
        foreach (var filePath in Directory.GetFiles(localDirectory))
        {
            string fileName = Path.GetFileName(filePath);
            string ossObjectKey = $"{ossDirectory}/{ossRelativePath}/{fileName}";

            // 上传文件
            client.PutObject(bucketName, ossObjectKey, filePath);
            Debug.Log($"已上传: {ossObjectKey}");
        }

        // 递归上传子目录
        foreach (var subDirectory in Directory.GetDirectories(localDirectory))
        {
            string dirName = Path.GetFileName(subDirectory) + "/";
            UploadDirectory(client, ossDirectory, subDirectory, ossRelativePath + dirName);
        }
    }

    /// <summary>
    /// 使用IEnumerator实现的异步上传（字节数组版本）
    /// </summary>
    private IEnumerator UploadFileAsync(byte[] bytes, string fileName,
        Action<string, string> onComplete, Action<long, long> onProgress = null)
    {
        if (_ossClient == null)
        {
            onComplete?.Invoke(null, "OSS客户端未初始化");
            yield break;
        }

        Debug.Log("upload oss start");
        string objectKey = $"{objectKeyPrefix}{fileName}";
        bool isCompleted = false;
        string resultUrl = null;
        string errorMsg = null;

        // 使用Task在后台线程执行上传
        Task.Run(() =>
        {
            try
            {
                using (var bodyStream = new MemoryStream(bytes))
                {
                    var request = new PutObjectRequest(bucketName, objectKey, bodyStream);

                    // 进度回调处理
                    request.StreamTransferProgress += (sender, args) =>
                    {
                        // 转换为MB显示
                        float downloadedMB = NetHelper.BytesToMB(args.TransferredBytes);
                        float totalMB = NetHelper.BytesToMB(args.TotalBytes);

                        // 更新UI
                        string mbInfo = $"{downloadedMB:F2}MB / {totalMB:F2}MB";

                        onProgress?.Invoke(args.TransferredBytes, args.TotalBytes);
                        Debug.Log($"upload oss progress: {mbInfo}");
                        // // 立即在主线程中触发进度回调
                        // UnityMainThreadDispatcher.Instance.Enqueue(() =>
                        // {
                        // });
                    };

                    // 执行上传
                    var result = _ossClient.PutObject(request);
                    Debug.Log($"上传状态码: {result.HttpStatusCode}");

                    // 上传成功
                    resultUrl = $"https://{bucketName}.{endpoint}/{objectKey}";
                    Debug.Log($"上传成功: {resultUrl}");
                }
            }
            catch (OssException ex)
            {
                errorMsg = $"OSS错误: {ex.ErrorCode} - {ex.Message}";
                Debug.LogError(errorMsg);
                isCompleted = true;
            }
            catch (Exception ex)
            {
                errorMsg = $"上传失败: {ex.Message}";
                Debug.LogError(errorMsg);
                isCompleted = true;
            }
            finally
            {
                isCompleted = true;
            }
        });

        // 等待后台任务完成
        while (!isCompleted)
        {
            yield return null;
        }

        // 触发完成回调
        onComplete?.Invoke(resultUrl, errorMsg);
        Debug.Log("upload oss finish");
    }

    // 获取上传进度。
    private void streamProgressCallback(object sender, StreamTransferProgressArgs args)
    {
        Debug.Log(
            $"ProgressCallback - Progress: {args.TransferredBytes * 100 / args.TotalBytes}%, TotalBytes:{args.TotalBytes}, TransferredBytes:{args.TransferredBytes} ");
    }
}