using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Net.Http;
using System.Security.AccessControl;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Threading;
using HeBianGu.Base.WpfBase;
using HeBianGu.General.WpfControlLib;
using HeBianGu.Service.Mvc;
using Hopetry.Provider;
using Hopetry.Provider.Behaviors;
using Hopetry.Services;
using Hopetry.ViewModel.Send;
using Microsoft.Extensions.Configuration;
using Minio.DataModel.Args;
using Minio.DataModel;
using Minio;
using Newtonsoft.Json.Linq;
using System.Diagnostics;
using System.Timers;

namespace HeBianGu.App.Disk
{
    [ViewModel("Send")]
    internal class SendViewModel : MvcViewModelBase
    {
        private LinkAction _uploadingAction; //正在上传
        private LinkAction _completeAction; //上传完成
        public LinkAction DownLinkAction;
        public LinkAction _waituploadAction;
        private readonly FileUploadService _uploadService;
        public ICommand WaitUpLoadCommand { get; }
        public ICommand DeleteWaitUpLoadCommand { get; }
        public bool _isUploading = false;

        public string CurrentMinIOPath;
        public SendViewModel()
        {
            _uploadService = new FileUploadService();
            // 初始化Timer 
            _progressTimer = new System.Timers.Timer(1000);
            _progressTimer.Elapsed += UpdateProgress;
            _heartbeatTimer = new System.Timers.Timer(30_000);
            //_heartbeatTimer.Elapsed += async (s, e) => await SendHeartbeatAsync();
            DeleteWaitUpLoadCommand = new AsyncRelayCommand(async () => await DeleteFile());
            WaitUpLoadCommand = new AsyncRelayCommand(async () => await UploadWaitItems());
            systemInfo = SystemInfoCollector.Collect();
            //加载待上传列表
            GetWaitUploadItems();
            //加载上传完成列表
            GetCompletedFiles();
        }
        protected override void Init()
        {
            ITransitionWipe wipe = new CircleWipe();

            DownLinkAction = new LinkAction()
            { Action = "Down", Controller = "Send", DisplayName = "下载 0", Logo = "\xe891", TransitionWipe = wipe };
            LinkActions.Add(DownLinkAction);
            // 正在上传
            _uploadingAction = new LinkAction()
            {
                Action = "UpLoad",
                Controller = "Send",
                DisplayName = "正在上传",
                Logo = "\xe6f3",
                TransitionWipe = wipe
            };
            LinkActions.Add(_uploadingAction);

            _completeAction = new LinkAction()
            {
                Action = "CompleteUpload",
                Controller = "Send",
                DisplayName = "上传完成",
                Logo = "\xe613",
                TransitionWipe = wipe
            };
            LinkActions.Add(_completeAction);

            _waituploadAction = new LinkAction()
            {
                Action = "WaitUpload",
                Controller = "Send",
                DisplayName = "待上传",
                Logo = "\xe613",
                TransitionWipe = wipe
            };
            LinkActions.Add(_waituploadAction);


            Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
                new Action(() => { SelectLink = LinkActions[0]; }));
            UpLoadItems.CollectionChanged += (s, e) => { UpdateUploadingItems(); };

        }

        protected override void Loaded(string args)
        {
        }

        #region 文件上传

        #region 参数

        //上传文件总数
        private ObservableCollection<UpLoadItems> _upLoadItems = new ObservableCollection<UpLoadItems>();

        /// <summary> 说明  </summary>
        public ObservableCollection<UpLoadItems> UpLoadItems
        {
            get { return _upLoadItems; }
            set
            {
                _upLoadItems = value;
                //UpdateUploadingItems();
                RaisePropertyChanged("UpLoadItems");
            }
        }

        //已上传完成文件
        private ObservableCollection<UpLoadItems> _completeItems = new ObservableCollection<UpLoadItems>();

        public ObservableCollection<UpLoadItems> CompleteItems
        {
            get { return _completeItems; }
            private set
            {
                _completeItems = value;
                RaisePropertyChanged("CompleteItems");
            }
        }

        //待上传文件
        private ObservableCollection<UpLoadItems> _waitUpLoadItems = new ObservableCollection<UpLoadItems>();

        /// <summary> 说明  </summary>
        public ObservableCollection<UpLoadItems> WaitUpLoadItems
        {
            get { return _waitUpLoadItems; }
            set
            {
                _waitUpLoadItems = value;
                RaisePropertyChanged("WaitUpLoadItems");
            }
        }

        private bool? _isAllSelected;
        public bool? IsAllSelected
        {
            get => _isAllSelected;
            set
            {
                _isAllSelected = value;
                // 全选/取消全选逻辑
                if (value.HasValue)
                {
                    foreach (var item in WaitUpLoadItems)
                    {
                        item.IsSelect = value.Value;
                    }
                }    
            }
        }

        // 只读属性，返回过滤后的集合（动态计算）
        private ObservableCollection<UpLoadItems> _uploadingItems = new ObservableCollection<UpLoadItems>();

        public ObservableCollection<UpLoadItems> UploadingItems
        {
            get { return _uploadingItems; }
            private set
            {
                _uploadingItems = value;
                RaisePropertyChanged("UploadingItems");
            }
        }

        // 在 UpLoadItems 变化时更新 UploadingItems
        public void UpdateUploadingItems()
        {
            UploadingItems = new ObservableCollection<UpLoadItems>(
                UpLoadItems?.Where(item => item.Value3 != "已完成") ?? Enumerable.Empty<UpLoadItems>()
            );
        }


        //文件上传进度
        private double _progress;

        public double Progress
        {
            get { return _progress; }
            set
            {
                if (_progress != value)
                {
                    _progress = value;
                    RaisePropertyChanged("Progress");
                }
            }
        }

        //上传文件个数
        private string _filecount;

        public string FileCount
        {
            get { return _filecount; }
            set
            {
                if (_filecount != value)
                {
                    _filecount = value;
                    RaisePropertyChanged("FileCount");
                }
            }
        }

        //上传完成文件个数
        private int _uploadingcount;

        public int UploadingCount
        {
            get { return _uploadingcount; }
            set
            {
                if (_uploadingcount != value)
                {
                    _uploadingcount = value;
                    _uploadingAction.FullName = "(" + _uploadingcount + ")";
                    RaisePropertyChanged("UploadingCount");
                }
            }
        }

        //上传文件个数
        private int _completecount;

        public int CompleteCount
        {
            get { return _completecount; }
            set
            {
                if (_completecount != value)
                {
                    _completecount = value;
                    _completeAction.FullName = "(" + _completecount + ")";
                    RaisePropertyChanged("CompleteCount");
                }
            }
        }

        //等待上传文件个数
        private int _waitcount;

        public int WaitCount
        {
            get { return _waitcount; }
            set
            {
                if (_waitcount != value)
                {
                    _waitcount = value;
                    _waituploadAction.FullName = "(" + _waitcount + ")";
                    RaisePropertyChanged("WaitCount");
                }
            }
        }
        #endregion

        #region PropertyChanged
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        #endregion

        #endregion

        #region 删除等待上传文件
        private async Task DeleteFile()
        {
            try
            {
                var items = WaitUpLoadItems.Where(r => r.IsSelect == true).ToList();
                if (items == null || !items.Any())
                {
                    await MessageProxy.Messager.ShowResult("请先选择要删除的项目");
                    return;
                }

                var message = $"确定要删除选中的 {items.Count} 个项目吗？";
                var result = MessageBox.Show(message, "确认删除", MessageBoxButton.YesNo);

                if (result == MessageBoxResult.Yes)
                {
                    List<string> list = new List<string>();
                    list=items.Select(r => r.Value4).ToList();
                    var flag= _uploadService.DeleteFiles(list);
                    WaitUpLoadItems.RemoveAll(r=>r.IsSelect==true);
                    WaitCount= WaitUpLoadItems.Count;
                    if (flag == true)
                    {
                        MessageBox.Show($"已成功删除 {items.Count} 个项目");
                        IsAllSelected = false;
                    }
                    else
                    {
                        MessageBox.Show($"删除失败");
                    }

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"删除失败: {ex.Message}");
            }
        }
        #endregion

        #region 上传待上传文件
        public async Task UploadWaitItems()
        {
            var items = WaitUpLoadItems.Where(r => r.IsSelect == true).ToList();
            try
            {
                foreach (var item in items)
                {
                    FileInfo fileInfo = new FileInfo(item.Value5);
                    string sizeText = fileInfo.Length < 1024 * 1024
                        ? $"{Math.Ceiling((decimal)fileInfo.Length / 1024)}KB"
                        : $"{Math.Ceiling((decimal)fileInfo.Length / (1024 * 1024))}MB";
                    UpLoadItems ut = new UpLoadItems();
                    ut.Value = item.Value;
                    ut.Value3 = "等待上传";
                    ut.Value4 = item.Value4; //唯一标识，与数据库一致
                    ut.Value5 = item.Value5; //文件名称
                    ut.Value6 = item.Value6; //文件地址
                    ut.Value9 = item.Value9;
                    ut.Double1 = fileInfo.Length;
                    ut.Double2 = 0.0;
                    ut.Bool1 = false;
                    ut.Value1 = $"0{(fileInfo.Length < 1024 * 1024 ? "KB" : "MB")}/{sizeText}";
                    UpLoadItems.Add(ut);
                }
                _uploadCount = UpLoadItems.Count;
                _completeCount = UpLoadItems.Where(r => r.Value3 == "已完成").Count();
                FileCount = _completeCount + "/" + _uploadCount;
                UploadingCount = UploadingItems.Count;
                CompleteCount = CompleteItems.Count;
                MessageBox.Show("正在上传列表中可查看进度");
                WaitUpLoadItems.RemoveAll(r => r.IsSelect == true);
                IsAllSelected = false;
                WaitCount = WaitUpLoadItems.Count;
                // 如果没有上传任务在运行，则启动上传
                if (!_isUploading)
                {
                    try
                    {
                        await ProcessUploadTasks();
                    }
                    catch
                    {
                        MessageBox.Show("上传失败");
                    }

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("文件丢失");
            }
        }
        #endregion

        #region  获取等待上传列表
        public void GetWaitUploadItems()
        {
            var waitlist = _uploadService.GetAllFiles().Where(r => r.IsComplete == false).ToList();
            ObservableCollection<UpLoadItems> up = new ObservableCollection<UpLoadItems>();
            if (_isUploading == false)
            {
                foreach (var file in waitlist)
                {
                    UpLoadItems upLoadItems = new UpLoadItems();
                    upLoadItems.Value = file.FileName;
                    upLoadItems.Value4 = file.Id;
                    upLoadItems.Value5 = file.FilePath;
                    upLoadItems.Value1 = file.FileSizeText;
                    upLoadItems.Value6 = file.FileName;
                    upLoadItems.Value7 = file.CreateTime.ToString("yyyy-MM-dd HH:mm:ss");
                    upLoadItems.Value9 = file.BucketName;
                    upLoadItems.Bool1 = false;
                    up.Add(upLoadItems);
                }

                WaitUpLoadItems.Clear();
                WaitUpLoadItems.AddRange(up);
                WaitCount = up.Count;
            }
        }

        #endregion

        #region 加载上传完成列表
        //加载初始完成文件
        public void GetCompletedFiles()
        {
            var files = _uploadService.GetAllFiles().Where(r => r.IsComplete == true).ToList();
            ObservableCollection<UpLoadItems> up = new ObservableCollection<UpLoadItems>();
            foreach (var file in files)
            {
                UpLoadItems upLoadItems = new UpLoadItems();
                upLoadItems.Value = file.FileName;
                upLoadItems.Value4 = file.Id;
                upLoadItems.Value5 = file.FilePath;
                upLoadItems.Value1 = file.FileSizeText;
                upLoadItems.Value6 = file.FileName;
                upLoadItems.Value7 = file.CompleteTime.ToString("yyyy-MM-dd HH:mm:ss");
                upLoadItems.Value9 = file.BucketName;
                up.Add(upLoadItems);
            }

            CompleteItems.Clear();
            CompleteItems.AddRange(up);
            regionCount = up.Count;
            CompleteCount = regionCount;
        }
        #endregion

        #region 上传
        //private SendViewModel _sendViewModel;
        private SemaphoreSlim _semaphore = new SemaphoreSlim(5);
        private System.Timers.Timer _progressTimer;
        private System.Timers.Timer _heartbeatTimer;
        private bool _isTimerRunning = false;
        private object _timerLock = new object();
        private Task _currentUploadTask = null; // 新增：当前上传任务
        private CancellationTokenSource _uploadCancellation = new CancellationTokenSource();
        public int _uploadCount = 0;
        private int _completeCount = 0;
        private int regionCount = 0;
        private ExplorerMinIOBehavior _explorerBehavior;
        private Hopetry.Provider.SystemInfo systemInfo;
        // 配置Redis连接
        //private RedisService redis = new RedisService("175.27.168.120:6050,password=HopetryRedis1406,connectRetry=3");
        #region 更新总进度条 每隔1s更新一次

        private void UpdateProgress(object sender, ElapsedEventArgs e)
        {
            if (UpLoadItems.Count == 0) return;

            double currentBytes = UpLoadItems.Sum(r => r.Double2);
            double totalBytes = UpLoadItems.Sum(r => r.Double1);
            double progress = Math.Round((currentBytes / totalBytes) * 100, 2);

            Application.Current.Dispatcher.Invoke(() => { Progress = progress; });
        }

        //上传redis心跳检测
        //private async Task SendHeartbeatAsync()
        //{
        //    try
        //    {
        //        // 上报心跳并更新客户端信息
        //        //await redis.StoreClientInfoAsync(systemInfo);
        //        await redis.UpdateClientHeartbeatAsync(systemInfo.MachineId);
        //    }
        //    catch (Exception ex)
        //    {
        //        // 处理网络异常等
        //        Debug.WriteLine($"心跳上报失败: {ex.Message}");
        //    }
        //}

        private void StartProgressTimer()
        {
            lock (_timerLock)
            {
                if (!_isTimerRunning)
                {
                    _progressTimer.Start();
                    _heartbeatTimer.Start();
                    _isTimerRunning = true;
                }
            }
        }

        private void StopProgressTimer()
        {
            lock (_timerLock)
            {
                if (_isTimerRunning)
                {
                    _progressTimer.Stop();
                    _heartbeatTimer.Stop();
                    _isTimerRunning = false;
                }
            }
        }

        #endregion

        //创建上传任务
        public async Task ProcessUploadTasks()
        {
            _isUploading = true;
            StartProgressTimer();
            // 收集系统信息
            //var systemInfo = SystemInfoCollector.Collect();
            try
            {
                // 存储到Redis
                //await redis.StoreClientInfoAsync(systemInfo);
                while (true)
                {
                    //获取所有未完成的上传项
                    var pendingItems = UpLoadItems
                        .Where(item => !item.Bool1)
                        .ToList();

                    if (!pendingItems.Any())
                        break; // 没有待上传文件，退出循环

                    //创建并运行上传任务
                    _currentUploadTask = Task.WhenAll(pendingItems.Select(async item =>
                    {
                        await _semaphore.WaitAsync(_uploadCancellation.Token);
                        try
                        {
                            await UploadFileToMinIOWithProgress(item);
                        }
                        finally
                        {
                            _semaphore.Release();
                        }
                    }));

                    await _currentUploadTask;
                }
            }
            catch (Exception ex)
            {
                //上传被取消
                //await redis.DeleteClientAsync(systemInfo.MachineId);
            }
            finally
            {
                await Task.Delay(2000);
                StopProgressTimer();
                // 删除redis信息
                //await redis.DeleteClientAsync(systemInfo.MachineId);
                _isUploading = false;
                UpLoadItems.Clear();
                //加载上传完成列表
                GetCompletedFiles();
                if (MySetting.Instance.IsOn && !UpLoadItems.Any(item => !item.Bool1))
                {
                    Shutdown();
                }
            }
        }

        //上传具体执行
        private async Task UploadFileToMinIOWithProgress(UpLoadItems ut)
        {
            ut.Bool1 = true;

            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("global.json", optional: false, reloadOnChange: true);
            // 构建配置
            var config = builder.Build();
            // 获取滑块设置的速度限制（转换为字节 / 秒）
            // 查询所有客户端
            //var allClients = await redis.GetAllClientsAsync();
            //var num = allClients == null ? 1 : allClients.Distinct().Count();
            //var speedLimit = 10 * 1024 * 1024 / num/5;

            var speedLimit = 100 * 1024 * 1024;
            //var speedLimit = Convert.ToInt64(config["Minio:limitspeed"]);
            var handler = new MinIOThrottledHandler(speedLimit,
                new HttpClientHandler
                {
                    // 保持 MinIO 必需的 SSL 配置
                    ServerCertificateCustomValidationCallback = (msg, cert, chain, errors) => true
                });

            //var handler =
            //            new HttpClientHandler
            //            {
            //                // 保持 MinIO 必需的 SSL 配置
            //                ServerCertificateCustomValidationCallback = (msg, cert, chain, errors) => true
            //            };

            try
            {
                // 从配置获取MinIO设置更安全
                IMinioClient client = new MinioClient()
                    .WithEndpoint(config["Minio:Endpoint"])
                    .WithCredentials(config["Minio:AccessKey"], config["Minio:SecretKey"])
                    .WithHttpClient(new HttpClient() { Timeout = TimeSpan.FromMinutes(30) })
                    .Build();
                //string bucketName = GetCurrentBucket();
                string bucketName = ut.Value9;
                if (string.IsNullOrEmpty(bucketName))
                {
                    throw new Exception("桶不能为空");
                }
                // 确保桶存在
                var beArgs = new BucketExistsArgs().WithBucket(bucketName);
                bool found = await client.BucketExistsAsync(beArgs).ConfigureAwait(false);
                if (!found)
                {
                    var mbArgs = new MakeBucketArgs().WithBucket(bucketName);
                    await client.MakeBucketAsync(mbArgs).ConfigureAwait(false);
                }

                // 关键修改：添加完成信号等待
                var completionSource = new TaskCompletionSource<bool>();
                var progress = new Progress<ProgressReport>(progressReport =>
                {
                    Application.Current.Dispatcher.Invoke(() =>
                    {
                        ut.Int1 = progressReport.Percentage;
                        long trans = progressReport.TotalBytesTransferred;
                        ut.Double2 = trans;

                        int slashIndex = ut.Value1.IndexOf('/');
                        string sizePart = ut.Value1.Substring(slashIndex);
                        string transferredPart = trans < 1024 * 1024
                            ? $"{Math.Ceiling((decimal)trans / 1024)}KB"
                            : $"{Math.Ceiling((decimal)trans / (1024 * 1024))}MB";

                        ut.Value1 = $"{transferredPart}{sizePart}";
                        if (progressReport.Percentage == 100)
                        {
                            ut.Value7 = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                            string id = ut.Value4.ToString();
                            _uploadService.UpdateFileComplete(id);
                            CompleteItems.Add(ut);
                            ut.Value3 = "已完成";
                            UpdateUploadingItems();
                            _completeCount++;
                            FileCount = _completeCount + "/" + _uploadCount;
                            UpdateFileCounts();
                            // 刷新当前目录
                            _explorerBehavior?.RefreshMinIOPath(CurrentMinIOPath);
                        }
                        else
                        {
                            ut.Value3 = "上传中...";
                        }

                        if (progressReport.Percentage == 100)
                        {
                            // 延迟500ms确保MinIO完成处理
                            Task.Delay(500).ContinueWith(_ => { completionSource.TrySetResult(true); });
                        }
                    });
                });

                // 对对象名称进行URL编码
                //string objectName = WebUtility.UrlEncode(ut.Value6);
                var putObjectArgs = new PutObjectArgs()
                    .WithBucket(bucketName)
                    .WithObject(ut.Value6)
                    .WithFileName(ut.Value5)
                    .WithProgress(progress)
                    .WithObjectSize(5 * 1024 * 1024);

                var uploadTask = client.PutObjectAsync(putObjectArgs);
                await Task.WhenAny(uploadTask, completionSource.Task);
                //await UploadVerifier.VerifyAsync(client, bucketName, objectName);
                if (uploadTask.IsFaulted)
                    throw uploadTask.Exception;
            }
            catch (Exception ex)
            {
                Application.Current.Dispatcher.Invoke(() => { ut.Value3 = $"上传失败: {ex.Message}"; });
            }
        }

        //获取当前路径下的桶
        private string GetCurrentBucket()
        {
            if (string.IsNullOrEmpty(CurrentMinIOPath))
                return string.Empty;

            return CurrentMinIOPath.Split('/')[0];
        }

        //更新上传进行中及上传完成列表
        private void UpdateFileCounts()
        {
            UploadingCount = UploadingItems.Count;
            CompleteCount = CompleteItems.Count;
        }

        //关机
        private void Shutdown()
        {
            try
            {
                Process.Start("shutdown", "/s /t 0");
            }
            catch (Win32Exception ex)
            {
                MessageBox.Show($"关机失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }
        #endregion
    }
}