using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Timers;
using System.Windows;
using System.Windows.Input;
using System.Windows.Threading;
using HeBianGu.Base.WpfBase;
using HeBianGu.Service.Mvc;
using Hopetry.Models;
using Hopetry.Services;
using Hopetry.ViewModel.Send;
using Microsoft.Extensions.Configuration;
using Microsoft.Win32;
using Microsoft.WindowsAPICodePack.Dialogs;
using Minio;
using Microsoft.Extensions.Configuration;
using Hopetry.ViewModel.Send;
using System.IO;
using System.Security.AccessControl;
using System.Diagnostics;
using System.Net.Http.Json;
using Microsoft.WindowsAPICodePack.Dialogs;
using Hopetry.Models;
using Yitter.IdGenerator;
using Minio.Exceptions;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.Window;
using HeBianGu.Control.Explorer;
using Hopetry.Provider.Behaviors;
using System.Text;
using Hopetry.Provider;
using Minio.ApiEndpoints;
using Minio.DataModel;
using Minio.DataModel.Args;
using Newtonsoft.Json;
using Timer = System.Timers.Timer;
using System.Collections.ObjectModel;

namespace HeBianGu.App.Disk
{
    [ViewModel("Loyout")]
    internal class LoyoutViewModel : MvcViewModelBase
    {
        private readonly FileUploadService _uploadService;
        private string _path;

        /// <summary> 说明  </summary>
        public string Path
        {
            get { return _path; }
            set
            {
                _path = value;
                RaisePropertyChanged("Path");
            }
        }


        private string _nearPath;

        /// <summary> 说明  </summary>
        public string NearPath
        {
            get { return _nearPath; }
            set
            {
                _nearPath = value;
                RaisePropertyChanged("NearPath");
            }
        }


        private string _sharePath;

        /// <summary> 说明  </summary>
        public string SharePath
        {
            get { return _sharePath; }
            set
            {
                _sharePath = value;
                RaisePropertyChanged("SharePath");
            }
        }


        protected override void Init()
        {
            Path = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);

            NearPath = Environment.GetFolderPath(Environment.SpecialFolder.Recent);

            SharePath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);

            // LinkActions.Add(new LinkAction() { Action = "Near", Controller = "Loyout", DisplayName = "最近使用", Logo = "\xe6f3" });
            LinkActions.Add(new LinkAction()
                { Action = "Explorer", Controller = "Loyout", DisplayName = "全部文件", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Image", Controller = "Loyout", DisplayName = "    图片", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Video", Controller = "Loyout", DisplayName = "    视频", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Document", Controller = "Loyout", DisplayName = "    文档", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Music", Controller = "Loyout", DisplayName = "    音乐", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Explorer", Controller = "Loyout", DisplayName = "    种子", Logo = "" });
            //LinkActions.Add(new LinkAction() { Action = "Recent", Controller = "Loyout", DisplayName = "    其他", Logo = "" });
            // LinkActions.Add(new LinkAction() { Action = "Space", Controller = "Loyout", DisplayName = "隐藏空间", Logo = "\xe613" });
            //LinkActions.Add(new LinkAction() { Action = "Share", Controller = "Loyout", DisplayName = "我的分享", Logo = "\xe764" });
            // LinkActions.Add(new LinkAction() { Action = "Near", Controller = "Loyout", DisplayName = "回收站", Logo = "\xe618" });

            Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
                new Action(() => { SelectLink = LinkActions[0]; }));
        }


        protected override void Loaded(string args)
        {
        }


        #region 文件上传

        private SendViewModel _sendViewModel;
        private IConfiguration config;
        private SemaphoreSlim _semaphore = new SemaphoreSlim(5);
        private Timer _progressTimer;
        private bool _isTimerRunning = false;
        private object _timerLock = new object();
        private bool _isUploading = false; // 新增：标记是否有上传任务正在运行
        private Task _currentUploadTask = null; // 新增：当前上传任务
        private CancellationTokenSource _uploadCancellation = new CancellationTokenSource();
        private int _uploadCount = 0;
        private int _completeCount = 0;
        private ExplorerMinIOBehavior _explorerBehavior;

        public ICommand UploadCommand { get; }
        public ICommand UploadCommand1 { get; }
        public ICommand CreateFolderCommand { get; }
        public ICommand DownloadCommand { get; set; }

        public ICommand DeleteFolderCommand { get; }

        //public ICommand SelectItemsCommand { get; }
        public LoyoutViewModel(SendViewModel sendViewModel)
        {
            _sendViewModel = sendViewModel;
            _uploadService = new FileUploadService();
            UploadCommand = new AsyncRelayCommand(async () => await UploadFile());
            UploadCommand1 = new AsyncRelayCommand(async () => await UploadFile1());
            CreateFolderCommand = new AsyncRelayCommand(async () => await CreateNewFolderAsync());
            DeleteFolderCommand = new AsyncRelayCommand(async () => await DeleteSelectedItemsAsync());
            DownloadCommand = new AsyncRelayCommand(async () => await DoDownloadCommand());
            //SelectItemsCommand = new AsyncRelayCommand(async () => await RelayCommand<SystemInfoModel>(SelectItem)SelectItem());
            // 初始化Timer 
            _progressTimer = new Timer(1000);
            _progressTimer.Elapsed += UpdateProgress;
            _sendViewModel.UpLoadItems.CollectionChanged += (s, e) => { _sendViewModel.UpdateUploadingItems(); };
        }

        private async Task DoDownloadCommand()
        {
            // todo 当为文件时，处理
            var selectedItems = _selectedItems;
            // 清除选中
            //SelectedItems = [];
            foreach (var item in selectedItems)
            {
                if (item is MinIOFileModel file)
                {
                    var temp = (MinIOFileInfo)file.Model;
                    var objectKey = temp.FullName.Replace(temp.BucketName + "/", "");
                    ViewModelLocator.DownViewModel.AddTask(temp.BucketName, objectKey);
                }

                if (item is MinIODirectoryModel dir)
                {
                    Console.WriteLine("建设中...");
                    //return ((MinIODirectoryInfo)dir.Model).BucketName;
                }
            }

        }

        // 添加设置Behavior的方法
        public void SetExplorerBehavior(ExplorerMinIOBehavior behavior)
        {
            _explorerBehavior = behavior;
        }

        private void UpdateProgress(object sender, System.Timers.ElapsedEventArgs e)
        {
            lock (_timerLock)
            {
                if (_sendViewModel.UpLoadItems.Count == 0) return;

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

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

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

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

        private async Task UploadFile()
        {
            var openFileDialog = new OpenFileDialog
            {
                Multiselect = true,
                Filter = "All Files (*.*)|*.*"
            };

            if (openFileDialog.ShowDialog() == true)
            {
                // 过滤掉已经存在的文件
                var newFiles = openFileDialog.FileNames
                    .Where(filePath => !_sendViewModel.UpLoadItems.Any(item =>
                        item.Value5.Equals(filePath, StringComparison.OrdinalIgnoreCase)))
                    .ToList();

                if (newFiles.Count == 0)
                {
                    MessageBox.Show("没有新文件需要上传或文件已在上传队列中");
                    return;
                }

                foreach (string filePath in newFiles)
                {
                    var ut = CreateUploadItem(filePath, System.IO.Path.GetFileName(filePath));
                    _sendViewModel.UpLoadItems.Add(ut);
                }

                _uploadCount = _sendViewModel.UpLoadItems.Count;
                //_uploadCount = _sendViewModel.UpLoadItems.Count;
                _completeCount = _sendViewModel.UpLoadItems.Where(r => r.Value3 == "已完成").Count();
                _sendViewModel.FileCount = _completeCount + "/" + _uploadCount;
                MessageBox.Show("传输列表中可查看进度");
                // 如果没有上传任务在运行，则启动上传
                if (!_isUploading)
                {
                    await ProcessUploadTasks();
                }
            }
        }

        private async Task UploadFile1()
        {
            var dialog = new CommonOpenFileDialog
            {
                IsFolderPicker = true,
                Title = "请选择上传文件"
            };

            if (dialog.ShowDialog() == CommonFileDialogResult.Ok)
            {
                string folderPath = dialog.FileName;
                string folderName = new DirectoryInfo(folderPath).Name; // 获取选中的文件夹名称
                var files = Directory.GetFiles(folderPath, "*.*", SearchOption.AllDirectories)
                    .Where(filePath => !_sendViewModel.UpLoadItems.Any(item =>
                        item.Value5.Equals(filePath, StringComparison.OrdinalIgnoreCase)))
                    .ToList();

                if (files.Count == 0)
                {
                    MessageBox.Show("没有新文件需要上传或文件已在上传队列中");
                    return;
                }

                foreach (string filePath in files)
                {
                    string relativePath =
                        folderName + "/" + filePath.Substring(folderPath.Length + 1).Replace('\\', '/');
                    var ut = CreateUploadItem(filePath, relativePath);
                    _sendViewModel.UpLoadItems.Add(ut);
                }

                _uploadCount = _sendViewModel.UpLoadItems.Count;
                _completeCount = _sendViewModel.UpLoadItems.Where(r => r.Value3 == "已完成").Count();
                _sendViewModel.FileCount = _completeCount + "/" + _uploadCount;
                MessageBox.Show("传输列表中可查看进度");
                // 如果没有上传任务在运行，则启动上传
                if (!_isUploading)
                {
                    await ProcessUploadTasks();
                }
            }
        }


        private UpLoadItems CreateUploadItem(string filePath, string objectName)
        {
            FileInfo fileInfo = new FileInfo(filePath);
            string sizeText = fileInfo.Length < 1024 * 1024
                ? $"{Math.Ceiling((decimal)fileInfo.Length / 1024)}KB"
                : $"{Math.Ceiling((decimal)fileInfo.Length / (1024 * 1024))}MB";

            //写入数据库
            FUpload fp = new FUpload();
            fp.Id = Guid.NewGuid().ToString();
            fp.FileName = objectName;
            fp.FileSize = fileInfo.Length;
            fp.FilePath = filePath;
            fp.FileType = fileInfo.Extension;
            fp.CreateTime = DateTime.Now;
            fp.IsComplete = false;
            fp.FileSizeText = sizeText;
            if (_uploadService.AddFile(fp))
            {
                return new UpLoadItems
                {
                    Value = System.IO.Path.GetFileName(filePath),
                    Value3 = "等待上传",
                    Value4 = fp.Id, //唯一标识，与数据库一致
                    Value5 = filePath,
                    Value6 = objectName,
                    Double1 = fileInfo.Length,
                    Double2 = 0.0,
                    Bool1 = false,
                    Value1 = $"0{(fileInfo.Length < 1024 * 1024 ? "KB" : "MB")}/{sizeText}"
                };
            }
            else
            {
                throw new Exception("文件载入失败");
            }
        }

        private async Task ProcessUploadTasks()
        {
            _isUploading = true;
            StartProgressTimer();

            try
            {
                while (true)
                {
                    // 获取所有未完成的上传项
                    var pendingItems = _sendViewModel.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 (OperationCanceledException)
            {
                // 上传被取消
            }
            finally
            {
                await Task.Delay(2000);
                StopProgressTimer();
                _isUploading = false;
                _sendViewModel.UpLoadItems.Clear();
                if (MySetting.Instance.IsOn && !_sendViewModel.UpLoadItems.Any(item => !item.Bool1))
                {
                    Shutdown();
                }
            }
        }

        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();
            // 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"])
                .Build();

            try
            {
                string bucketName = config["Minio:BucketName"];

                // 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);
                }

                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);
                            _sendViewModel.CompleteItems.Add(ut);
                            ut.Value3 = "已完成";
                            _sendViewModel.UpdateUploadingItems();
                            _completeCount++;
                            _sendViewModel.FileCount = _completeCount + "/" + _uploadCount;
                        }
                        else
                        {
                            ut.Value3 = "上传中...";
                        }
                    });
                });

                var putObjectArgs = new PutObjectArgs()
                    .WithBucket(bucketName)
                    .WithObject(ut.Value6)
                    .WithFileName(ut.Value5)
                    .WithProgress(progress);

                await client.PutObjectAsync(putObjectArgs);
            }
            catch (Exception ex)
            {
                Application.Current.Dispatcher.Invoke(() => { ut.Value3 = $"上传失败: {ex.Message}"; });
            }
        }

        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

        #region 文件列表

        private string _currentMinIOPath;

        /// <summary> 说明CurrentMinIOPath  </summary>
        public string CurrentMinIOPath
        {
            get { return _currentMinIOPath; }
            set
            {
                // 确保路径格式正确
                var newPath = value;
                if (!string.IsNullOrEmpty(newPath) && !newPath.EndsWith("/") &&
                    newPath.Contains("/") && !newPath.EndsWith("/"))
                {
                    newPath += "/";
                }

                if (_currentMinIOPath != newPath)
                {
                    _currentMinIOPath = newPath;
                    RaisePropertyChanged("CurrentMinIOPath");

                    // 强制刷新导航栏
                    if (_explorerBehavior != null)
                    {
                        _explorerBehavior.RefreshMinIOPath(newPath);
                    }
                }
            }
        }


        public ObservableCollection<SystemInfoModel> Items { get; } = new ObservableCollection<SystemInfoModel>();

        private async Task CreateNewFolderAsync()
        {
            try
            {
                //// 获取当前绑定的集合
                //var itemsSource = AssociatedObject.ItemsSource as ObservableCollection<SystemInfoModel>;
                //if (itemsSource == null) return;

                // 创建新的文件夹模型
                var newFolder = new MinIODirectoryModel(
                    new MinIODirectoryInfo(GetCurrentBucket(), "新建文件夹/", false, DateTime.Now))
                {
                    IsRenaming = false // 设置为可编辑状态
                };

                //// 添加到集合最前面
                //itemsSource.Insert(0, newFolder);

                // 通知行为类开始编辑
                _explorerBehavior?.BeginEditNewFolder(newFolder);

                await Task.Delay(100); // 等待UI更新
            }
            catch (Exception ex)
            {
                MessageBox.Show($"创建文件夹失败: {ex.Message}");
            }
        }

        public async Task CreateMinIOFolder(string folderName)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("global.json", optional: false, reloadOnChange: true);
            // 构建配置
            var config = builder.Build();
            // 从配置获取MinIO设置更安全
            IMinioClient client = new Minio.MinioClient()
                .WithEndpoint(config["Minio:Endpoint"])
                .WithCredentials(config["Minio:AccessKey"], config["Minio:SecretKey"])
                .Build();

            if (string.IsNullOrWhiteSpace(folderName))
                return;

            if (!folderName.EndsWith("/"))
                folderName += "/";

            try
            {
                var bucketName = GetCurrentBucket();
                var prefix = GetCurrentPrefix();

                var beArgs = new BucketExistsArgs().WithBucket(bucketName);
                bool found = await client.BucketExistsAsync(beArgs);
                if (!found)
                {
                    var mbArgs = new MakeBucketArgs().WithBucket(bucketName);
                    await client.MakeBucketAsync(mbArgs);
                }

                using (var emptyStream = new MemoryStream(Encoding.UTF8.GetBytes(" ")))
                {
                    await client.PutObjectAsync(
                        new PutObjectArgs()
                            .WithBucket(bucketName)
                            .WithObject(prefix + folderName)
                            .WithStreamData(emptyStream)
                            .WithObjectSize(1) // 必须设置为0
                            .WithContentType("application/x-directory"));
                }

                // 刷新当前目录
                _explorerBehavior?.RefreshMinIOPath(CurrentMinIOPath);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"在MinIO中创建文件夹失败: {ex.Message}");
            }
        }

        private string GetCurrentBucket()
        {
            if (string.IsNullOrEmpty(CurrentMinIOPath))
                return string.Empty;

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

        private string GetCurrentPrefix()
        {
            if (string.IsNullOrEmpty(CurrentMinIOPath) || CurrentMinIOPath.IndexOf('/') < 0)
                return string.Empty;

            return CurrentMinIOPath.Substring(CurrentMinIOPath.IndexOf('/') + 1);
        }

        #endregion

        #region 删除文件夹

        private ObservableCollection<SystemInfoModel> _selectedItems = new ObservableCollection<SystemInfoModel>();

        public ObservableCollection<SystemInfoModel> SelectedItems
        {
            get { return _selectedItems; }
            set
            {
                _selectedItems = value;
                RaisePropertyChanged();
            }
        }

        private ICommand _selectItemsCommand;

        public ICommand SelectItemsCommand => _selectItemsCommand ??
                                              (_selectItemsCommand = new RelayCommand<SystemInfoModel>(SelectItem));

        private void SelectItem(SystemInfoModel item)
        {
            if (item == null) return;

            if (SelectedItems.Contains(item))
            {
                SelectedItems.Remove(item);
            }
            else
            {
                SelectedItems.Add(item);
            }
        }

        private async Task DeleteSelectedItemsAsync()
        {
            try
            {
                var selectedItems = _selectedItems;

                if (selectedItems == null || !selectedItems.Any())
                {
                    MessageBox.Show("请先选择要删除的项目");
                    return;
                }

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

                if (result == MessageBoxResult.Yes)
                {
                    await DeleteMinIOItems(selectedItems);

                    _explorerBehavior.RefreshMinIOPath(CurrentMinIOPath);
                    MessageBox.Show($"已成功删除 {selectedItems.Count} 个项目");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"删除失败: {ex.Message}");
            }
        }

        private async Task DeleteMinIOItems(IEnumerable<SystemInfoModel> items)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("global.json", optional: false, reloadOnChange: true);
            var config = builder.Build();

            using var client = new MinioClient()
                .WithEndpoint(config["Minio:Endpoint"])
                .WithCredentials(config["Minio:AccessKey"], config["Minio:SecretKey"])
                .Build();

            // 按桶分组
            var itemsByBucket = items.GroupBy(item =>
            {
                if (item is MinIOFileModel file)
                    return ((MinIOFileInfo)file.Model).BucketName;
                if (item is MinIODirectoryModel dir)
                    return ((MinIODirectoryInfo)dir.Model).BucketName;
                return null;
            });

            foreach (var bucketGroup in itemsByBucket.Where(g => g.Key != null))
            {
                var bucketName = bucketGroup.Key;
                var objectsToDelete = new List<string>();

                foreach (var item in bucketGroup)
                {
                    if (item is MinIOFileModel fileModel)
                    {
                        var fileInfo = (MinIOFileInfo)fileModel.Model;
                        objectsToDelete.Add(fileInfo.FullName.Substring(fileInfo.BucketName.Length + 1));
                    }
                    else if (item is MinIODirectoryModel dirModel)
                    {
                        var dirInfo = (MinIODirectoryInfo)dirModel.Model;
                        var folderPath = dirInfo.FullName.Substring(dirInfo.BucketName.Length + 1);

                        // 确保文件夹路径以斜杠结尾
                        if (!folderPath.EndsWith("/")) folderPath += "/";

                        // 获取文件夹下所有对象
                        var listArgs = new ListObjectsArgs()
                            .WithBucket(bucketName)
                            .WithPrefix(folderPath)
                            .WithRecursive(true);

                        await foreach (var obj in client.ListObjectsEnumAsync(listArgs))
                        {
                            objectsToDelete.Add(obj.Key);
                        }

                        // 添加文件夹标记本身
                        objectsToDelete.Add(folderPath);
                    }
                }

                // 批量删除
                if (objectsToDelete.Any())
                {
                    await client.RemoveObjectsAsync(
                        new RemoveObjectsArgs()
                            .WithBucket(bucketName)
                            .WithObjects(objectsToDelete));
                }
            }
        }

        #endregion
    }

    internal class DataFileViewModel : ObservableSourceViewModel<TestViewModel>
    {
        protected override void Init()
        {
            base.Init();
        }
    }
}