using ComPDFKit.PDFDocument;
using PDF_Master.CustomControl;
using PDF_Master.Model;
using PDF_Master.Model.Dialog.HomePageToolsDialogs.HomePageBatchProcessing;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using Prism.Services.Dialogs;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Forms;
using CheckBox = System.Windows.Controls.CheckBox;
using DialogResult = Prism.Services.Dialogs.DialogResult;
using static PDF_Master.Model.Dialog.HomePageToolsDialogs.HomePageBatchProcessing.HomePageSetPasswordDialogModel;
using PDF_Master.Model.Dialog.ToolsDialogs.SaftyDialogs;
using PDF_Master.Helper;

namespace PDF_Master.ViewModels.Dialog.HomePageToolsDialogs.HomePageBatchProcessing
{
    public class HomePageSetPasswordDialogViewModel : BindableBase, INavigationAware
    {
        #region 参数和属性
        private List<string> fileNames;

        public IDialogService dialogs;

        private int fileNamesIndex = 0;

        private int FileNameNumber = 0;

        private HomePageSetPasswordDialogModel setPasswordDialogModel = new HomePageSetPasswordDialogModel();

        public List<int> fileNamesView = new List<int>();

        private bool _canOpen;
        public bool CanOpen
        {
            get { return _canOpen; }
            set
            {
                _canOpen = value;
                RaisePropertyChanged("isChecked");
            }
        }

        private bool _canEdit;
        public bool CanEdit
        {
            get { return _canEdit; }
            set
            {
                _canEdit = value;
                RaisePropertyChanged("isChecked");
            }
        }

        private EnumPermissionsMod enumPermissionsMod = EnumPermissionsMod.StatusUnknown | EnumPermissionsMod.StatusRestrictPrinting | EnumPermissionsMod.StatusRestrictCopying;

        private string _changeMod = "0";
        ///<value>
        ///"0"为ChangeMod.None;
        ///"1"为ChangeMod.ChangePage;
        ///"2"为ChangeMod.FormAndSignature;
        ///"3"为ChangeMod.AnnotAndFormAndSignature;
        ///"4"为ChangeMod.ExceptAbstrat;
        ///</value>
        public string ChangeMod
        {
            get { return _changeMod; }
            set
            {
                _changeMod = value;
            }
        }

        private string _printMod = "0";
        ///<value>
        ///"0"为PrintMod.None;
        ///"1"为PrintMod.LowDpi;
        ///"2"为PrintMod.HighDpi;
        ///</value>
        public string PrintMod
        {
            get { return _printMod; }
            set
            {
                _printMod = value;
            }
        }
        private string _isEnableConfirm = "False";
        public string IsEnabledConfirm
        {
            get { return _isEnableConfirm; }
            set
            {
                SetProperty(ref _isEnableConfirm, value);
            }
        }

        private bool _enableConfirm = false;
        public bool EnableConfirm
        {
            get { return _enableConfirm; }
            set { SetProperty(ref _enableConfirm, value); }
        }

        private string _openPassword = "";
        public string OpenPassword
        {
            get { return _openPassword; }
            set
            {
                SetProperty(ref _openPassword, value);
                CheckEnableConfirmEncrypt();
            }
        }

        private string _permissionsPassword = "";
        public string PermissionsPassword
        {
            get { return _permissionsPassword; }
            set
            {
                SetProperty(ref _permissionsPassword, value);
                CheckEnableConfirmEncrypt();
            }
        }

        private string _openPasswordMsg = "Open Password";
        public string OpenPasswordMsg
        {
            get { return _openPasswordMsg; }
            set
            {
                SetProperty(ref _openPasswordMsg, value);
            }
        }

        private string _permissionsPasswordMsg = "Permission Password";
        public string PermissionsPasswordMsg
        {
            get { return _permissionsPasswordMsg; }
            set
            {
                SetProperty(ref _permissionsPasswordMsg, value);
            }
        }

        private string safetyGridIsEnabled = "True";
        public string SafetyGridIsEnabled
        {
            get
            {
                return safetyGridIsEnabled;
            }
            set
            {
                SetProperty(ref safetyGridIsEnabled, value);
            }
        }

        private string setSafetyGridIsEnabled = "True";
        public string SetSafetyGridIsEnabled
        {
            get
            {
                return setSafetyGridIsEnabled;
            }
            set
            {
                SetProperty(ref setSafetyGridIsEnabled, value);
            }
        }

        private Visibility _openTextVisibility = Visibility.Collapsed;
        public Visibility OpenTextVisibility
        {
            get { return _openTextVisibility; }
            set
            {
                SetProperty(ref _openTextVisibility, value);
            }
        }

        private Visibility _openPasswordVisibility = Visibility.Visible;
        public Visibility OpenPasswordVisibility
        {
            get { return _openPasswordVisibility; }
            set
            {
                if (value == Visibility.Visible)
                {
                    OpenTextVisibility = Visibility.Collapsed;
                }
                else
                {
                    OpenTextVisibility = Visibility.Visible;
                }
                SetProperty(ref _openPasswordVisibility, value);
            }
        }

        private Visibility _permissionsPasswordVisibility = Visibility.Visible;
        public Visibility PermissionsPasswordVisibility
        {
            get { return _permissionsPasswordVisibility; }
            set
            {
                if (value == Visibility.Visible)
                {
                    PermissionsTextVisibility = Visibility.Collapsed;
                }
                else
                {
                    PermissionsTextVisibility = Visibility.Visible;
                }
                SetProperty(ref _permissionsPasswordVisibility, value);
            }
        }

        private Visibility _permissionsTextVisibility = Visibility.Collapsed;
        public Visibility PermissionsTextVisibility
        {
            get { return _permissionsTextVisibility; }
            set { SetProperty(ref _permissionsTextVisibility, value); }
        }

        private bool? _isRestrictPrinting;
        public bool? IsRestrictPrinting
        {
            get { return _isRestrictPrinting; }
            set { SetProperty(ref _isRestrictPrinting, value); }
        }

        private bool? _isRestrictCopying;
        public bool? IsRestrictCopying
        {
            get { return _isRestrictCopying; }
            set { SetProperty(ref _isRestrictCopying, value); }
        }

        private bool _needOpenPassword;
        public bool NeedOpenPassword
        {
            get { return _needOpenPassword; }
            set { SetProperty(ref _needOpenPassword, value); }
        }

        private bool _needPermissionsPassword;
        public bool NeedPermissionsPassword
        {
            get { return _needPermissionsPassword; }
            set { SetProperty(ref _needPermissionsPassword, value); }
        }

        private bool _isOpenPasswordDisplayed;
        public bool IsOpenPasswordDisplayed
        {
            get { return _isOpenPasswordDisplayed; }
            set { SetProperty(ref _isOpenPasswordDisplayed, value); }
        }

        private bool _isPermissionsPasswordDisplayed;
        public bool IsPermissionsPasswordDisplayed
        {
            get { return _isPermissionsPasswordDisplayed; }
            set { SetProperty(ref _isPermissionsPasswordDisplayed, value); }
        }

        private DataTable pdfDataTable = new DataTable();
        public DataTable PDFDataTable
        {
            get { return pdfDataTable; }
            set
            {
                SetProperty(ref pdfDataTable, value);
            }
        }

        private DataTable pdfCurrentDataTable = new DataTable();
        public DataTable PDFCurrentDataTable
        {
            get { return pdfCurrentDataTable; }
            set
            {
                SetProperty(ref pdfCurrentDataTable, value);
            }
        }

        private string removeIsEnable = "False";
        public string RemoveIsEnable
        {
            get { return removeIsEnable; }
            set
            {
                SetProperty(ref removeIsEnable, value);
            }
        }

        private string selectFileName = "False";
        public string SelectFileName
        {
            get { return selectFileName; }
            set
            {
                SetProperty(ref selectFileName, value);
            }
        }

        private Visibility addFileVisibility = Visibility.Hidden;
        public Visibility AddFileVisibility
        {
            get { return addFileVisibility; }
            set
            {
                SetProperty(ref addFileVisibility, value);
                RaisePropertyChanged();

            }
        }
        #endregion

        #region 委托声明

        public DelegateCommand<object> DisplayPasswordCommand { get; set; }

        public DelegateCommand<object> SetOpenPasswordCommand { get; set; }

        public DelegateCommand<object> SetPermissionsPasswordCommand { get; set; }

        public DelegateCommand<object> SetRestrictCommand { get; set; }

        public DelegateCommand EncryptCommand { get; set; }

        public DelegateCommand DelegateSetOpenCommand { get; set; }

        public DelegateCommand DelegateSetEditCommand { get; set; }

        public DelegateCommand DelegateCanOpenTextChangedCommand { get; set; }

        public DelegateCommand DelegateCanEditTextChangedCommand { get; set; }

        public DelegateCommand DelegateConfirmEncryptCommand { get; set; }

        public DelegateCommand CancelEncryptCommand { get; set; }

        public DelegateCommand DelegateCancelEncryptCommand { get; set; }

        public DelegateCommand ADDPDFCommand { get; set; }

        public DelegateCommand ADDOpenedPDFCommand { get; set; }

        public DelegateCommand RemovePDFFileCommand { get; set; }

        public DelegateCommand ADDPDFFilesCommand { get; set; }
        #endregion

        public HomePageSetPasswordDialogViewModel(IDialogService dialogs)
        {
            PDFCurrentDataTable.Columns.Add("FileState");
            PDFDataTable.Columns.Add("FileName");
            PDFDataTable.Columns.Add("FileSize");
            PDFDataTable.Columns.Add("FileState");
            HomePageSetPasswordDialogModel.PasswordForOpen = "";
            HomePageSetPasswordDialogModel.PasswordForEdit = "";

            DisplayPasswordCommand = new DelegateCommand<object>(DisplayPassword);
            SetOpenPasswordCommand = new DelegateCommand<object>(SetOpenPassword);
            SetPermissionsPasswordCommand = new DelegateCommand<object>(SetPermissionsPassword);
            SetRestrictCommand = new DelegateCommand<object>(SetRestrict);
            EncryptCommand = new DelegateCommand(ConfirmEncrypt);

            DelegateConfirmEncryptCommand = new DelegateCommand(ConfirmEncrypt);

            ADDPDFCommand = new DelegateCommand(addpdf);
            ADDOpenedPDFCommand = new DelegateCommand(addOpenedPDFFiles);
            ADDPDFFilesCommand = new DelegateCommand(addpdffiles);
            RemovePDFFileCommand = new DelegateCommand(removepdffile);
            this.dialogs = dialogs;
        }

        #region 检查和初始化

        private void CheckEnableConfirmEncrypt()
        {
            EnableConfirm = true;
            if (!(NeedOpenPassword || NeedPermissionsPassword))
            {
                EnableConfirm = false;
            }
            if (NeedOpenPassword && string.IsNullOrEmpty(OpenPassword))
            {
                EnableConfirm = false;
            }
            if (NeedPermissionsPassword && string.IsNullOrEmpty(PermissionsPassword))
            {
                EnableConfirm = false;
            }
            if (NeedPermissionsPassword && (!((bool)IsRestrictCopying || (bool)IsRestrictPrinting)))
            {
                EnableConfirm = false;
            }
        }

        #endregion
        #region 逻辑函数
  
        public void DisplayPassword(object e)
        {
            var chk = e as CheckBox;
            if (chk != null)
            {
                if (chk.Name == "DisplayOpenPasswordChk")
                {
                    if (chk.IsChecked == true)
                    {
                        OpenPasswordVisibility = Visibility.Collapsed;
                    }
                    else
                    {
                        OpenPasswordVisibility = Visibility.Visible;
                    }
                }
                else
                {
                    if (chk.IsChecked == true)
                    {
                        PermissionsPasswordVisibility = Visibility.Collapsed;
                    }
                    else
                    {
                        PermissionsPasswordVisibility = Visibility.Visible;
                    }
                }
            }
        }

        public void SetOpenPassword(object e)
        {
            var chk = e as CheckBox;
            if (chk != null)
            {
                IsOpenPasswordDisplayed = false;
                OpenPasswordVisibility = Visibility.Visible;
            }
            CheckEnableConfirmEncrypt();
        }

        public void SetPermissionsPassword(object e)
        {
            var chk = e as CheckBox;
            if (chk != null)
            {
                IsPermissionsPasswordDisplayed = false;
                PermissionsPasswordVisibility = Visibility.Visible;
                if (chk.IsChecked == true)
                {
                    IsRestrictPrinting = true;
                    IsRestrictCopying = true;
                }
                else
                {
                    IsRestrictPrinting = false;
                    IsRestrictCopying = false;
                }
            }
            CheckEnableConfirmEncrypt();
        }

        public void SetRestrict(object e)
        {
            var chk = e as CheckBox;
            if (chk != null)
            {

                if ((bool)chk.IsChecked)
                {
                    if (chk.Tag.ToString() == "Printing")
                    {
                        enumPermissionsMod |= EnumPermissionsMod.StatusRestrictPrinting;
                    }
                    else if (chk.Tag.ToString() == "Copying")
                    {
                        enumPermissionsMod |= EnumPermissionsMod.StatusRestrictCopying;
                    }
                }
                else
                {
                    if (chk.Tag.ToString() == "Printing")
                    {
                        enumPermissionsMod -= EnumPermissionsMod.StatusRestrictPrinting;
                    }
                    else if (chk.Tag.ToString() == "Copying")
                    {
                        enumPermissionsMod -= EnumPermissionsMod.StatusRestrictCopying;
                    }
                }
            }
            CheckEnableConfirmEncrypt();
        }

        public void ConfirmEncrypt()
        {
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            string saveSelectedPath = "";
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                saveSelectedPath = dlg.SelectedPath.Trim();
                saveSelectedPath = saveSelectedPath + "\\";
            }
            else { return; }
            HomePageBatchProcessingDialogModel.closeDialog = true;
            SafetyGridIsEnabled = "False";
            string openPassword = "";
            string permissionsPassword = "";
            CPDFPermissionsInfo permissionsInfo = new CPDFPermissionsInfo();
            if (NeedOpenPassword)
            {
                if (!string.IsNullOrEmpty(OpenPassword))
                {
                    openPassword = OpenPassword;
                }
            }
            if (NeedPermissionsPassword)
            {
                if (!string.IsNullOrEmpty(PermissionsPassword))
                {
                    permissionsPassword = PermissionsPassword;
                    permissionsInfo = CreatePermissionsInfo(enumPermissionsMod);
                }
            }
            fileNamesIndex = 0;
            foreach (var filename in fileNames)
            {
                PDFDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                CPDFDocument document = CPDFDocument.InitWithFilePath(filename);
                if(document == null)
                {
                    PDFDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                    PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                    fileNamesIndex++;
                    continue;
                }
                if (document.IsLocked)
                {
                    DialogParameters value = new DialogParameters();
                    value.Add(ParameterNames.PDFDocument, document);
                    dialogs.ShowDialog(DialogNames.VerifyPassWordDialog, value, e =>
                    {
                        if (e.Result == ButtonResult.OK)
                        {
                            if (e.Parameters.ContainsKey(ParameterNames.PassWord) && e.Parameters.GetValue<string>(ParameterNames.PassWord) != null)
                            {
                                document.UnlockWithPassword(e.Parameters.GetValue<string>(ParameterNames.PassWord).ToString());
                            }
                        }
                    });

                    if (document.IsLocked)
                    {
                        //未成功解密文档时，释放Document对象，返回
                        PDFDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        fileNamesIndex++;
                        continue;
                    }
                }
                //FileInfo fileinfo = new FileInfo(filename);
                //string file_size = (((float)fileinfo.Length) / 1024).ToString() + " K";
                document.Encrypt(openPassword, permissionsPassword, permissionsInfo);
                document.WriteToFilePath(CommonHelper.CreateFilePath(saveSelectedPath + document.FileName + "SetPassword"));
                PDFDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                fileNamesIndex++;
                document.Release();
            }
            SafetyGridIsEnabled = "True";
            HomePageBatchProcessingDialogModel.closeDialog = false;
        }


        #endregion

        #region 批量处理逻辑函数
        /// <summary>
        /// 添加PDF文件
        /// </summary>
        private void addpdf()
        {
            FileNameNumber = fileNames.Count;
            System.Windows.Forms.OpenFileDialog dlg = new System.Windows.Forms.OpenFileDialog();
            dlg.Multiselect = true;
            dlg.Filter = "PDF|*.pdf;*.PDF;";
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                fileNames.AddRange(dlg.FileNames.ToList());
                RemoveExcess(ref fileNames);
                SetSafetyGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
                updateListview("wait");
            }
        }

        public void addPDFFiles(string filename)
        {
            FileNameNumber = fileNames.Count;
            fileNames.Add(filename);
            RemoveExcess(ref fileNames);
            SetSafetyGridIsEnabled = "True";
            AddFileVisibility = Visibility.Collapsed;
            updateListview("wait");
        }

        /// <summary>
        /// 添加已打开PDF文件
        /// </summary>
        public void addOpenedPDFFiles()
        {
            FileNameNumber = fileNames.Count;
            foreach (var filename in App.OpenedFileList)
            {
                fileNames.Add(filename);
            }
            RemoveExcess(ref fileNames);
            SetSafetyGridIsEnabled = "True";
            AddFileVisibility = Visibility.Collapsed;
            updateListview("wait");
        }

        /// <summary>
        /// 删除重复的文件
        /// </summary>
        public void RemoveExcess(ref List<string> Filenames)
        {
            List<string> filenames = new List<string>();
            foreach (var fileName in Filenames)
            {
                if (!filenames.Contains(fileName))
                {
                    filenames.Add(fileName);
                }
            }
            Filenames.Clear();
            Filenames = filenames;
        }

        /// <summary>
        /// 添加PDF文件夹
        /// </summary>
        private void addpdffiles()
        {
            FileNameNumber = fileNames.Count;
            FolderBrowserDialog dialog = new FolderBrowserDialog();
            dialog.Description = "请选择文件路径";
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {

                string foldPath = dialog.SelectedPath;
                var apps = System.IO.Directory.GetFiles(foldPath);
                foreach (string app in apps)
                {
                    var fi = new FileInfo(app);
                    if (fi.Extension == ".pdf" || fi.Extension == ".PDF")
                    {
                        fileNames.Add(app);
                    }
                }
                RemoveExcess(ref fileNames);
                updateListview("wait");
                SetSafetyGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
            }
        }

        /// <summary>
        /// 更新listview显示
        /// state 状态显示字符串
        /// </summary>
        public void updateListview(string state)
        {
            updateCurrentListview();
            DataTable pdfdatatable = new DataTable();
            pdfdatatable.Columns.Add("FileName");
            pdfdatatable.Columns.Add("FileSize");
            pdfdatatable.Columns.Add("FileState");
            int datatableindex = 0;
            foreach (var fileName in fileNames)
            {
                string file_all = fileName;
                FileInfo f = new FileInfo(file_all);
                string file_size = (((float)f.Length) / 1024).ToString() + " K";
                pdfdatatable.Rows.Add(f.Name, file_size, PDFCurrentDataTable.Rows[datatableindex]["FileState"]);
                datatableindex++;
            }
            PDFDataTable = pdfdatatable;
            HomePageBatchProcessingDialogModel.FilePaths = fileNames;

        }

        /// <summary>
        /// 更新Currentlistview显示
        /// state 状态显示字符串
        /// </summary>
        public void updateCurrentListview( string state = "wait")
        {
            if (fileNames.Count >= FileNameNumber)
            {
                for (int i = 0; fileNames.Count - FileNameNumber > i; i++)
                {
                    PDFCurrentDataTable.Rows.Add(state);
                }
            }
            else
            {
                Reverseorder(ref fileNamesView);
                foreach (int filenamesview in fileNamesView)
                {
                    PDFCurrentDataTable.Rows.RemoveAt(filenamesview);
                }
            }
        }

        /// <summary>
        /// 逆序int类型集合
        /// </summary>
        public void Reverseorder(ref List<int> Numbers)
        {
            Numbers = Numbers.OrderBy(a => a).ToList();
            Numbers.Reverse();
        }

        /// <summary>
        /// 打开文件PDF
        /// </summary>
        public void openfiledialog()
        {

            foreach (int filenamesview in fileNamesView)
            {
                System.Diagnostics.Process.Start("Explorer", "/select," + fileNames[filenamesview]);
            }
        }

        /// <summary>
        /// 删除文件PDF
        /// </summary>
        public void removepdffile()
        {
            FileNameNumber = fileNames.Count;
            Reverseorder(ref fileNamesView);
            foreach (int filenamesview in fileNamesView)
            {
                //Trace.WriteLine(filenamesview);
                fileNames.Remove(fileNames[filenamesview]);
            }
            if (fileNames.Count < 1)
            {
                SetSafetyGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }
            updateListview("wait");
        }

        public void removepdffile(int index)
        {
            PDFCurrentDataTable.Rows.RemoveAt(index);
            fileNames.Remove(fileNames[index]);

            if (fileNames.Count < 1)
            {
                SetSafetyGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }

            updateListview("wait");
        }

        public void PDFFileCount()
        {
            if (fileNames.Count == 0)
            {
                SetSafetyGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }
            else
            {
                SetSafetyGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
            }
        }
        #endregion
        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            List<string> filepath = new List<string>();
            navigationContext.Parameters.TryGetValue<List<string>>(ParameterNames.FilePath, out filepath);
            if (filepath != null)
            {

                fileNames = filepath;
                PDFFileCount();
                updateListview("wait");
            }
        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }
    }
}