using ComPDFKit.PDFDocument;
using Compdfkit_Tools.Helper;
using Compdfkit_Tools.PDFControl;
using Compdfkit_Tools.PDFView;
using ComPDFKitViewer;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using ComPDFKit.DigitalSign;

namespace DigitalSignature
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        private string currentMode = "Viewer";

        private PDFViewControl pdfViewer;
        private PDFViewControl passwordViewer;
        private RegularViewerControl regularViewerControl = new RegularViewerControl();
        private DigitalSignatureControl digitalSignatureControl = new DigitalSignatureControl();
        private CPDFBOTABarControl botaBarControl = new CPDFBOTABarControl(BOTATools.Thumbnail | BOTATools.Outline | BOTATools.Bookmark | BOTATools.Search | BOTATools.Annotation | BOTATools.Signature);
        private CPDFDisplaySettingsControl displaySettingsControl = new CPDFDisplaySettingsControl();
        private SignatureStatusBarControl signatureStatusBarControl = new SignatureStatusBarControl();
        private List<CPDFSignature> signatures = new List<CPDFSignature>();

        private PanelState panelState = PanelState.GetInstance();
        public event EventHandler<bool> OnCanSaveChanged;


        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }


        private bool _canSave = false;
        public bool CanSave
        {
            get => _canSave;
            set
            {
                _canSave = value;
                OnPropertyChanged();
            }
        }

        public bool LeftToolPanelButtonIsChecked
        {
            get => panelState.IsLeftPanelExpand;
            set
            {
                panelState.IsLeftPanelExpand = value;
                OnPropertyChanged();
            }
        }

        public bool RightToolPanelButtonIsChecked
        {
            get
            {
                return (panelState.RightPanel == PanelState.RightPanelState.PropertyPanel);
            }
            set
            {
                panelState.RightPanel = (value) ? PanelState.RightPanelState.PropertyPanel : PanelState.RightPanelState.None;
                OnPropertyChanged();
            }
        }

        public bool ViewSettingBtnIsChecked
        {
            get
            {
                return (panelState.RightPanel == PanelState.RightPanelState.ViewSettings);
            }
            set
            {
                panelState.RightPanel = (value) ? PanelState.RightPanelState.ViewSettings : PanelState.RightPanelState.None;
                OnPropertyChanged();
            }
        }

        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;
            digitalSignatureControl.AfterFillSignature -= DigitalSignatureControl_AfterFillSignature;
            digitalSignatureControl.AfterFillSignature += DigitalSignatureControl_AfterFillSignature;
        }

        private void DigitalSignatureControl_AfterFillSignature(object sender, string e)
        {
            OpenFile(e);
        }

        #region Load Document

        private void OpenFile(string filePath = "")
        {
            if (string.IsNullOrEmpty(filePath))
            {
                filePath = CommonHelper.GetExistedPathOrEmpty();
            }
            string oldFilePath = pdfViewer.PDFView.Document.FilePath;

            if (!string.IsNullOrEmpty(filePath) && regularViewerControl.PdfViewControl != null)
            {
                if (pdfViewer.PDFView != null && pdfViewer.PDFView.Document != null)
                {
                    if (oldFilePath.ToLower() == filePath.ToLower())
                    {
                        return;
                    }
                }

                passwordViewer = new PDFViewControl();
                passwordViewer.PDFView.InitDocument(filePath);
                if (passwordViewer.PDFView.Document == null)
                {
                    MessageBox.Show("Open File Failed");
                    return;
                }

                if (passwordViewer.PDFView.Document.IsLocked)
                {
                    PasswordUI.SetShowText(System.IO.Path.GetFileName(filePath) + " password encrypted.");
                    PasswordUI.ClearPassword();
                    PopupBorder.Visibility = Visibility.Visible;
                    PasswordUI.Visibility = Visibility.Visible;
                }
                else
                {
                    pdfViewer = passwordViewer;
                    LoadDocument();
                }
            }
        }

        private void LoadDefaultDocument()
        {
            string defaultFilePath = "PDF32000_2008.pdf";
            pdfViewer.PDFView.InitDocument(defaultFilePath);
            LoadDocument();
        }

        private void LoadCustomControl()
        {
            signatures = SignatureHelper.GetEffectiveSignatureList(pdfViewer.PDFView.Document.GetSignatureList());
            VerifySignatures();
            
            regularViewerControl.PdfViewControl = pdfViewer;
            regularViewerControl.InitWithPDFViewer(pdfViewer.PDFView);
            regularViewerControl.PdfViewControl.PDFView.SetMouseMode(MouseModes.Viewer);
            regularViewerControl.SetBOTAContainer(null);
            regularViewerControl.SetBOTAContainer(botaBarControl);
            regularViewerControl.SetDisplaySettingsControl(displaySettingsControl);
            PDFGrid.Child = regularViewerControl;
            
            signatureStatusBarControl.SetStatus(signatures);
            regularViewerControl.SetSignatureStatusBarControl(signatureStatusBarControl);

            signatureStatusBarControl.OnViewSignatureButtonClicked -= ViewAllSignatures;
            signatureStatusBarControl.OnViewSignatureButtonClicked += ViewAllSignatures;
            
            digitalSignatureControl.OnCanSaveChanged -= DigitalSignatureControl_OnCanSaveChanged;
            digitalSignatureControl.OnCanSaveChanged += DigitalSignatureControl_OnCanSaveChanged;
            digitalSignatureControl.SignatureStatusChanged -= DigitalSignatureControl_OnSignatureStatusChanged;
            digitalSignatureControl.SignatureStatusChanged += DigitalSignatureControl_OnSignatureStatusChanged;
        }

        private void LoadDocument()
        {
            if (pdfViewer.PDFView.Document == null)
            {
                return;
            }

            pdfViewer.PDFView.Load();
            pdfViewer.PDFView.SetShowLink(true);

            pdfViewer.PDFView.InfoChanged -= PdfViewer_InfoChanged;
            pdfViewer.PDFView.InfoChanged += PdfViewer_InfoChanged;

            pdfViewer.PDFView.SetFormFieldHighlight(true);
            pdfViewer.CustomSignHandle = true;

            PasswordUI.Closed -= PasswordUI_Closed;
            PasswordUI.Canceled -= PasswordUI_Canceled;
            PasswordUI.Confirmed -= PasswordUI_Confirmed;
            PasswordUI.Closed += PasswordUI_Closed;
            PasswordUI.Canceled += PasswordUI_Canceled;
            PasswordUI.Confirmed += PasswordUI_Confirmed;
            ModeComboBox.SelectedIndex = 0;
            botaBarControl.InitWithPDFViewer(pdfViewer.PDFView);
            botaBarControl.SelectBotaTool(BOTATools.Thumbnail);
            botaBarControl.DeleteSignatureEvent -= BotaControlOnDeleteSignatureEvent;
            botaBarControl.DeleteSignatureEvent += BotaControlOnDeleteSignatureEvent;
            botaBarControl.ViewCertificateEvent -= digitalSignatureControl.ViewCertificateEvent;
            botaBarControl.ViewCertificateEvent += digitalSignatureControl.ViewCertificateEvent;
            botaBarControl.ViewSignatureEvent -= digitalSignatureControl.ViewSignatureEvent;    
            botaBarControl.ViewSignatureEvent += digitalSignatureControl.ViewSignatureEvent;
            
            displaySettingsControl.InitWithPDFViewer(pdfViewer.PDFView);
            LoadCustomControl();
            pdfViewer.PDFView.ChangeFitMode(FitMode.FitWidth);
            CPDFSaclingControl.InitWithPDFViewer(pdfViewer.PDFView);
            
            regularViewerControl.IsActive = true;
            digitalSignatureControl.InitWithPDFViewer(pdfViewer.PDFView);
        }

        public void BotaControlOnDeleteSignatureEvent(object sender, EventArgs e)
        {
            DigitalSignatureControl_OnSignatureStatusChanged(sender, e);
        }
        
        private void DigitalSignatureControl_OnSignatureStatusChanged(object sender, EventArgs e)
        {
            signatures = SignatureHelper.GetEffectiveSignatureList(pdfViewer.PDFView.Document.GetSignatureList());
            VerifySignatures();
            signatureStatusBarControl.SetStatus(signatures);
            botaBarControl.LoadSignatureList();
        }

        private void DigitalSignatureControl_OnCanSaveChanged(object sender, bool e)
        {
            this.CanSave = e;
        }

        private void PdfViewer_InfoChanged(object sender, KeyValuePair<string, object> e)
        {
            if (e.Key == "Zoom")
            {
                CPDFSaclingControl.SetZoomTextBoxText(string.Format("{0}", (int)((double)e.Value * 100)));
            }
        }

        private void PasswordUI_Confirmed(object sender, string e)
        {
            if (passwordViewer != null && passwordViewer.PDFView != null && passwordViewer.PDFView.Document != null)
            {
                passwordViewer.PDFView.Document.UnlockWithPassword(e);
                if (passwordViewer.PDFView.Document.IsLocked == false)
                {
                    PasswordUI.SetShowError("", Visibility.Collapsed);
                    PasswordUI.ClearPassword();
                    PasswordUI.Visibility = Visibility.Collapsed;
                    PopupBorder.Visibility = Visibility.Collapsed;
                    pdfViewer = passwordViewer;
                    LoadDocument();
                }
                else
                {
                    PasswordUI.SetShowError("Wrong Password", Visibility.Visible);
                }
            }
        }

        private void PasswordUI_Canceled(object sender, EventArgs e)
        {
            PopupBorder.Visibility = Visibility.Collapsed;
            PasswordUI.Visibility = Visibility.Collapsed;
        }

        private void PasswordUI_Closed(object sender, EventArgs e)
        {
            PopupBorder.Visibility = Visibility.Collapsed;
            PasswordUI.Visibility = Visibility.Collapsed;
        }
        #endregion

        private void OpenFile_Click(object sender, RoutedEventArgs e)
        {
            OpenFile();
        }

        private void SaveFileBtn_Click(object sender, RoutedEventArgs e)
        {
            SaveFile();
            pdfViewer.PDFView.UndoManager.CanSave = false;
        }

        private void LeftToolPanelButton_Click(object sender, RoutedEventArgs e)
        {
            panelState.IsLeftPanelExpand = (sender as ToggleButton).IsChecked == true;
        }

        private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var item = (sender as ComboBox).SelectedItem as ComboBoxItem;
            if (item.Content as string == currentMode)
            {
                return;
            }
            LeftToolPanelButtonIsChecked = false;
            LeftToolPanelButton.IsChecked = false;
            ViewSettingBtnIsChecked = false;
            if(ViewSettingBtn != null)
                ViewSettingBtn.IsChecked = false;
            
            if (currentMode == "Viewer")
            {
                regularViewerControl.ClearViewerControl();
                regularViewerControl.IsActive = false;
            }
            else if (currentMode == "Digital Signature")
            {
                digitalSignatureControl.ClearViewerControl();
                digitalSignatureControl.IsActive = false;
            }

            if (item.Content as string == "Viewer")
            {
                regularViewerControl.IsActive = true;
                if (regularViewerControl.PdfViewControl != null && regularViewerControl.PdfViewControl.PDFView != null)
                {
                    PDFGrid.Child = regularViewerControl;
                    regularViewerControl.PdfViewControl.PDFView.SetMouseMode(MouseModes.Viewer);
                    regularViewerControl.PdfViewControl = pdfViewer;
                    regularViewerControl.InitWithPDFViewer(pdfViewer.PDFView);
                    regularViewerControl.SetBOTAContainer(botaBarControl);
                    regularViewerControl.SetDisplaySettingsControl(displaySettingsControl);
                    regularViewerControl.SetSignatureStatusBarControl(signatureStatusBarControl);
                }
            }
            else if (item.Content as string == "Digital Signature")
            {
                digitalSignatureControl.IsActive = true;
                if (digitalSignatureControl.PDFViewControl != null && digitalSignatureControl.PDFViewControl.PDFView != null)
                {
                    PDFGrid.Child = digitalSignatureControl;
                    digitalSignatureControl.PDFViewControl.PDFView.SetMouseMode(MouseModes.Viewer);
                    digitalSignatureControl.PDFViewControl = pdfViewer;
                    digitalSignatureControl.InitWithPDFViewer(pdfViewer.PDFView);
                    digitalSignatureControl.SetBOTAContainer(botaBarControl);
                    digitalSignatureControl.SetDisplaySettingsControl(displaySettingsControl);
                    digitalSignatureControl.SetSignatureStatusBarControl(signatureStatusBarControl);
                }
            }
            currentMode = item.Content as string;
        }
        
        private void ViewAllSignatures(object sender, EventArgs e)
        {
            LeftToolPanelButton.IsChecked = true;
            panelState.IsLeftPanelExpand = true;
            botaBarControl.SelectBotaTool(BOTATools.Signature);
        }

        private void VerifySignatures()
        {
            foreach (var sig in signatures)
            {
                sig.VerifySignatureWithDocument(pdfViewer.PDFView.Document);
            }
        }

        private void ExpandSearchBtn_Click(object sender, RoutedEventArgs e)
        {
            LeftToolPanelButton.IsChecked = true;
            panelState.IsLeftPanelExpand = true;
            botaBarControl.SelectBotaTool(BOTATools.Search);
        }

        private void RightPanelButton_Click(object sender, RoutedEventArgs e)
        {
            panelState.RightPanel =
                ((sender as ToggleButton).IsChecked == true) ?
                PanelState.RightPanelState.PropertyPanel : PanelState.RightPanelState.None;
        }

        private void ViewSettingBtn_Click(object sender, RoutedEventArgs e)
        {
            panelState.RightPanel =
                ((sender as ToggleButton).IsChecked == true) ?
                    PanelState.RightPanelState.ViewSettings : PanelState.RightPanelState.None;
        }

        private void PageInfoBtn_Click(object sender, RoutedEventArgs e)
        {
            PasswordUI.Visibility = Visibility.Collapsed;
            FileInfoUI.Visibility = Visibility.Visible;
            FileInfoControl.InitWithPDFViewer(pdfViewer.PDFView);
            PopupBorder.Visibility = Visibility.Visible;

        }

        private void FileInfoCloseBtn_Click(object sender, RoutedEventArgs e)
        {
            PopupBorder.Visibility = Visibility.Collapsed;
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            pdfViewer = new PDFViewControl();
            LoadDefaultDocument();
        }

        private void Window_Unloaded(object sender, RoutedEventArgs e)
        {

        }

        #region Save file
        /// <summary>
        /// Save the file to another PDF file.
        /// </summary>
        public void SaveAsFile()
        {
            {
                if (pdfViewer != null && pdfViewer.PDFView != null && pdfViewer.PDFView.Document != null)
                {
                    CPDFDocument pdfDoc = pdfViewer.PDFView.Document;
                    SaveFileDialog saveDialog = new SaveFileDialog();
                    saveDialog.Filter = "(*.pdf)|*.pdf";
                    saveDialog.DefaultExt = ".pdf";
                    saveDialog.OverwritePrompt = true;

                    if (saveDialog.ShowDialog() == true)
                    {
                        pdfDoc.WriteToFilePath(saveDialog.FileName);
                    }
                }
            }
        }

        /// <summary>
        /// Save the file in the current path.
        /// </summary>
        public void SaveFile()
        {
            if (pdfViewer != null && pdfViewer.PDFView != null && pdfViewer.PDFView.Document != null)
            {
                try
                {
                    CPDFDocument pdfDoc = pdfViewer.PDFView.Document;
                    if (pdfDoc.WriteToLoadedPath())
                    {
                        return;
                    }

                    SaveFileDialog saveDialog = new SaveFileDialog();
                    saveDialog.Filter = "(*.pdf)|*.pdf";
                    saveDialog.DefaultExt = ".pdf";
                    saveDialog.OverwritePrompt = true;

                    if (saveDialog.ShowDialog() == true)
                    {
                        pdfDoc.WriteToFilePath(saveDialog.FileName);
                    }
                }
                catch (Exception ex)
                {

                }
            }
        }
        #endregion
    }
}