using ComPDFKitViewer.PdfViewer;
using Microsoft.Office.Interop.Excel;
using PDF_Master.CustomControl;
using PDF_Master.Helper;
using PDF_Master.Model;
using PDF_Master.Properties;
using PDF_Master.Strings.MainPage;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

namespace PDF_Master.ViewModels.Dialog.ConverterDialogs
{
    public class OCRDownloadProgressViewModel : BindableBase, IDialogAware
    {
        public string Title => throw new NotImplementedException();

        private string T_progressBarName;

        public string T_ProgressBarName
        {
            get { return T_progressBarName; }
            set
            {
                SetProperty(ref T_progressBarName, value);
            }
        }

        private string T_tryAgainBtn;

        public string T_TryAgainBtn
        {
            get { return T_tryAgainBtn; }
            set
            {
                SetProperty(ref T_tryAgainBtn, value);
            }
        }

        private string T_errorTextBlock;

        public string T_ErrorTextBlock
        {
            get { return T_errorTextBlock; }
            set
            {
                SetProperty(ref T_errorTextBlock, value);
            }
        }

        private string T_cancelBtn;

        public string T_CancelBtn
        {
            get { return T_cancelBtn; }
            set
            {
                SetProperty(ref T_cancelBtn, value);
            }
        }

        private void SetLangText()
        {
            T_ProgressBarName = App.MainPageLoader.GetString("OCR_Downloading");
            T_tryAgainBtn = App.MainPageLoader.GetString("OCR_DownloadRedownload");
            T_ErrorTextBlock = App.MainPageLoader.GetString("OCR_DownloadError");
            T_CancelBtn = App.MainPageLoader.GetString("OCR_CancelDownload");

        }

        private Visibility errorStackPanelVisible = Visibility.Collapsed;

        public Visibility ErrorStackPanelVisible
        {
            get { return errorStackPanelVisible; }
            set
            {
                SetProperty(ref errorStackPanelVisible, value);
            }
        }

        private Visibility tryAgainBtnVisible = Visibility.Collapsed;

        public Visibility TryAgainBtnVisible
        {
            get { return tryAgainBtnVisible; }
            set
            {
                SetProperty(ref tryAgainBtnVisible, value);
            }
        }

        System.Net.WebClient client = null;

        private MainPage mainPage = null;

        public string exePath = "";

        private string FileNameComPDFKit = "";

        private bool isItemClieck = false;

        private bool isDownloadCancelled = false;

        private CPDFViewer Pdfviewer { set; get; }

        private string password = "";

        private double currentSize;

        private string progressBarCurrentSizeValue = "0 MB";

        public string ProgressBarCurrentSizeValue
        {
            get { return progressBarCurrentSizeValue; }
            set
            {
                SetProperty(ref progressBarCurrentSizeValue, value);
            }
        }

        private string progressBarFileSize = "0 MB";

        public string ProgressBarFileSize
        {
            get { return progressBarFileSize; }
            set
            {
                SetProperty(ref progressBarFileSize, value);
            }
        }

        private double progressBarCurrentValue = 0;

        public double ProgressBarCurrentValue
        {
            get { return progressBarCurrentValue; }
            set
            {
                SetProperty(ref progressBarCurrentValue, value);
            }
        }

        #region 委托声明

        public DelegateCommand CancelCommand { get; set; }

        public DelegateCommand TryAgainCommnad { get; set; }

        #endregion

        public OCRDownloadProgressViewModel()
        {
            CancelCommand = new DelegateCommand(cancel);
            TryAgainCommnad = new DelegateCommand(tryAgain);
            SetLangText();
        }

        private async void tryAgain()
        {
            try
            {
                client = null;
                FileComparisonHelper.RemoveOCRModel();
                FileComparisonHelper.Getpdfreaderprocast();
                await DownloadOCR();
            }
            catch
            {
                await Task.Delay(100);
                ErrorStackPanelVisible = Visibility.Visible;
                TryAgainBtnVisible = Visibility.Visible;
            }
        }

        private void cancel()
        {
            isDownloadCancelled = true;
            if (client != null)
            {
                //防止退出没释放
                client.CancelAsync();
                client.Dispose();
                FileComparisonHelper.RemoveOCRModel();
            }
            RequestClose.Invoke(new DialogResult(ButtonResult.Cancel));
        }

        public async Task<bool> DownloadOCR()
        {
            bool canDownloadCancelled = false;
            ErrorStackPanelVisible = Visibility.Collapsed;
            TryAgainBtnVisible = Visibility.Collapsed;
            try
            {
                await Task.Run(() =>
                {

                    string folder = System.IO.Path.Combine(App.CurrentPath, "OCREnginezip");

                    FileNameComPDFKit = folder + "\\" + "OCREngine" + ".zip";
                    long fileSize = 0;
                    if (!Directory.Exists(folder))
                    {


                        Directory.CreateDirectory(folder);
                        client = new System.Net.WebClient();
                        System.Net.WebRequest request = System.Net.WebRequest.Create(Settings.Default.AppProperties.OCRFile_Url);
                        request.Method = "HEAD";

                        using (System.Net.WebResponse response = request.GetResponse())
                        {
                            if (long.TryParse(response.Headers.Get("Content-Length"), out long contentLength))
                            {
                                fileSize = contentLength;
                                App.Current.Dispatcher.Invoke(() =>
                                {
                                    ProgressBarFileSize = ((double)fileSize / (1024 * 1024)).ToString("0.00") + " MB";
                                    currentSize = ((double)fileSize / (1024 * 1024));
                                });
                            }
                        }
                        client.DownloadProgressChanged += Client_DownloadProgressChanged;
                        client.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(DownloadCompleted);
                        client.DownloadFileAsync(new Uri(Settings.Default.AppProperties.OCRFile_Url), FileNameComPDFKit);
                    }
                    canDownloadCancelled = true;
                });
                return canDownloadCancelled;
            }
            catch
            {
                canDownloadCancelled = false;
                ErrorStackPanelVisible = Visibility.Visible;
                TryAgainBtnVisible = Visibility.Visible;
                //Close();
                return canDownloadCancelled;

            }

        }

        private void DownloadCompleted(object sender, AsyncCompletedEventArgs e)
        {
            string folderPath = App.CurrentPath;
            //解压转档资源文件，intiRes
            string folderModelPath = App.CurrentPath;
            if (!Directory.Exists(folderModelPath + "//OCREngine"))
            {
                ExtractWithProgress(FileNameComPDFKit, folderModelPath);
            }
            exePath = folderModelPath;

        }

        public void ExtractWithProgress(string sourceZipFilePath, string destinationFolderPath)
        {
            var extractedCount = 0;
            if (System.IO.File.Exists(sourceZipFilePath))
            {
                try
                {
                    using (var zip = ZipFile.OpenRead(sourceZipFilePath))
                    {
                        var totalEntries = zip.Entries.Count;
                        var progressStep = totalEntries / 20;

                        foreach (var entry in zip.Entries)
                        {
                            var extractionPath = System.IO.Path.Combine(destinationFolderPath, entry.FullName);
                            string replacement = "OCREngine";
                            //提换文件夹名字保证文件夹统一
                            int slashIndex = entry.FullName.IndexOf('/');
                            if (slashIndex != -1)
                            {
                                string modifiedString = replacement + entry.FullName.Substring(slashIndex);
                                extractionPath = System.IO.Path.Combine(destinationFolderPath, modifiedString);
                            }
                            if (entry.Name == "")
                            {
                                // 处理目录的情况，例如在ZIP文件中的文件夹
                                Directory.CreateDirectory(extractionPath);
                                continue;
                            }

                            var entryDirectoryName = System.IO.Path.GetDirectoryName(extractionPath);
                            if (!Directory.Exists(entryDirectoryName))
                            {
                                Directory.CreateDirectory(entryDirectoryName);
                            }

                            entry.ExtractToFile(extractionPath, true);
                            extractedCount++;

                            // 更新进度条：输出百分比或者使用其他进度条组件
                            App.Current.Dispatcher.Invoke(() =>
                            {
                                ProgressBarCurrentValue = extractedCount / progressStep + 80;
                                ProgressBarCurrentSizeValue = (currentSize * (ProgressBarCurrentValue / 100)).ToString("0.00") + " MB";
                                Trace.WriteLine("进度条 ： " + ProgressBarCurrentValue);
                            });
                        }
                    }
                    App.Current.Dispatcher.Invoke(() =>
                    {
                        ProgressBarCurrentValue = 0;
                        ProgressBarCurrentSizeValue = (currentSize * (ProgressBarCurrentValue / 100)).ToString("0.00") + " MB";
                        string folderzipPath = System.IO.Path.Combine(App.CurrentPath, "OCREnginezip");
                        if (Directory.Exists(folderzipPath))
                        {
                            Directory.Delete(folderzipPath, true);
                        }
                        //Close()
                        if (FileComparisonHelper.OCRModelItExist())
                        {
                            var dialogresult = new DialogResult(ButtonResult.OK);
                            RequestClose.Invoke(dialogresult);
                        }
                        else
                        {
                            string folderPath = System.IO.Path.Combine(App.CurrentPath, "OCREngine");
                            if (Directory.Exists(folderPath))
                            {
                                Directory.Delete(folderPath, true);
                            }
                            //MessageBoxEx.Show("需要更新最新版的APP才能下载哦");

                        }



                    });
                }
                catch
                {
                    App.Current.Dispatcher.Invoke(() =>
                    {
                        ProgressBarCurrentValue = 0;
                        ProgressBarCurrentSizeValue = (currentSize * (ProgressBarCurrentValue / 100)).ToString("0.00") + " MB";
                        //Close();
                        ErrorStackPanelVisible = Visibility.Visible;
                        TryAgainBtnVisible = Visibility.Visible;
                    });
                }
            }
            else
            {
                App.Current.Dispatcher.Invoke(() =>
                {
                    ProgressBarCurrentValue = 0;
                    ProgressBarCurrentSizeValue = (currentSize * (ProgressBarCurrentValue / 100)).ToString("0.00") + " MB";
                    ErrorStackPanelVisible = Visibility.Visible;
                    TryAgainBtnVisible = Visibility.Visible;
                    //Close();
                });

            }

        }

        private void Client_DownloadProgressChanged(object sender, System.Net.DownloadProgressChangedEventArgs e)
        {
            App.Current.Dispatcher.Invoke(() =>
            {
                ProgressBarCurrentValue = e.ProgressPercentage * 0.8;
                ProgressBarCurrentSizeValue = (currentSize * (ProgressBarCurrentValue / 100)).ToString("0.00") + " MB";
            });
            if (isDownloadCancelled)
            {
                if (client != null)
                {
                    App.Current.Dispatcher.Invoke(() =>
                    {
                        client.CancelAsync();
                    });
                }

                // 执行其他取消操作
                // ...
            }
        }

        public event Action<IDialogResult> RequestClose;

        public bool CanCloseDialog()
        {
            return true;
        }

        public void OnDialogClosed()
        {

        }

        public async void OnDialogOpened(IDialogParameters parameters)
        {
            await DownloadOCR();
        }
    }
}