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 Minio.DataModel;
using Minio.DataModel.Args;
using Timer = System.Timers.Timer;

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;


        public ICommand UploadCommand { get; }
        public ICommand UploadCommand1 { get; }

        public LoyoutViewModel(SendViewModel sendViewModel)
        {
            _sendViewModel = sendViewModel;
            _uploadService = new FileUploadService();
            UploadCommand = new AsyncRelayCommand(async () => await UploadFile());
            UploadCommand1 = new AsyncRelayCommand(async () => await UploadFile1());
            // 初始化Timer 
            _progressTimer = new Timer(1000);
            _progressTimer.Elapsed += UpdateProgress;
            _sendViewModel.UpLoadItems.CollectionChanged += (s, e) =>
            {
                _sendViewModel.UpdateUploadingItems();
            };
        }

        private void UpdateProgress(object sender, 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  </summary>
        public string CurrentMinIOPath
        {
            get { return _currentMinIOPath; }
            set
            {
                _currentMinIOPath = value;
                RaisePropertyChanged("CurrentMinIOPath");
            }
        }
        #endregion

    }

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



        }
    }
}