using Ink_Canvas.Helpers;
using iNKORE.UI.WPF.Modern;
using System;
using System.Collections.ObjectModel;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Ink;
using System.Windows.Media;
using System.Diagnostics;
using File = System.IO.File;
using MessageBox = System.Windows.MessageBox;
using System.Runtime.InteropServices;
using System.Windows.Interop;
using System.Windows.Controls.Primitives;
using System.Drawing;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Win32;
using System.Text;
using System.Windows.Documents;
using Ink_Canvas.Popups;
using iNKORE.UI.WPF.Modern.Controls;
using System.Windows.Forms;
using System.Windows.Input;
using Ink_Canvas.Resources.ICCConfiguration;
using Vanara.PInvoke;
using Application = System.Windows.Application;
using Button = System.Windows.Controls.Button;
using TextBox = System.Windows.Controls.TextBox;

namespace Ink_Canvas {
    public partial class MainWindow : PerformanceTransparentWin {

        protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
        {
            base.OnPropertyChanged(e);

            if (e.Property.Name == nameof(Topmost) && isLoaded) {
                if (Topmost && Settings.Advanced.IsEnableForceFullScreen) {
                    Trace.WriteLine("Topmost true");
                    SetWindowPos(new WindowInteropHelper(this).Handle, new IntPtr(-1), 0, 0, 0, 0, 0x0002|0x0040|0x0001);
                } else if (!Topmost && Settings.Advanced.IsEnableForceFullScreen) {
                    Trace.WriteLine("Topmost false");
                    SetWindowPos(new WindowInteropHelper(this).Handle, new IntPtr(-2), 0, 0, 0, 0, 0x0002|0x0040|0x0001);
                }
            }
        }

        #region Window Initialization

        public MainWindow() {
            /*
                处于画板模式内：Topmost == false / currentMode != 0
                处于 PPT 放映内：BtnPPTSlideShowEnd.Visibility
            */
            InitializeComponent();

            BlackboardLeftSide.Visibility = Visibility.Collapsed;
            BlackboardCenterSide.Visibility = Visibility.Collapsed;
            BlackboardRightSide.Visibility = Visibility.Collapsed;
            BorderTools.Visibility = Visibility.Collapsed;
            BorderSettings.Visibility = Visibility.Collapsed;
            LeftSidePanelForPPTNavigation.Visibility = Visibility.Collapsed;
            RightSidePanelForPPTNavigation.Visibility = Visibility.Collapsed;
            BorderSettings.Margin = new Thickness(0, 0, 0, 0);
            TwoFingerGestureBorder.Visibility = Visibility.Collapsed;
            BoardTwoFingerGestureBorder.Visibility = Visibility.Collapsed;
            BorderDrawShape.Visibility = Visibility.Collapsed;
            BoardBorderDrawShape.Visibility = Visibility.Collapsed;
            GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;

            ViewboxFloatingBar.Margin = new Thickness((SystemParameters.WorkArea.Width - 284) / 2,
                SystemParameters.WorkArea.Height - 60, -2000, -200);
            ViewboxFloatingBarMarginAnimation(100, true);

            try {
                if (File.Exists("debug.ini")) Label.Visibility = Visibility.Visible;
            }
            catch (Exception ex) {
                LogHelper.WriteLogToFile(ex.ToString(), LogHelper.LogType.Error);
            }

            try {
                if (File.Exists("Log.txt")) {
                    var fileInfo = new FileInfo("Log.txt");
                    var fileSizeInKB = fileInfo.Length / 1024;
                    if (fileSizeInKB > 512)
                        try {
                            File.Delete("Log.txt");
                            LogHelper.WriteLogToFile(
                                "The Log.txt file has been successfully deleted. Original file size: " + fileSizeInKB +
                                " KB", LogHelper.LogType.Info);
                        }
                        catch (Exception ex) {
                            LogHelper.WriteLogToFile(
                                ex + " | Can not delete the Log.txt file. File size: " + fileSizeInKB + " KB",
                                LogHelper.LogType.Error);
                        }
                }
            }
            catch (Exception ex) {
                LogHelper.WriteLogToFile(ex.ToString(), LogHelper.LogType.Error);
            }

            InitTimers();
            timeMachine.OnRedoStateChanged += TimeMachine_OnRedoStateChanged;
            timeMachine.OnUndoStateChanged += TimeMachine_OnUndoStateChanged;
            inkCanvas.Strokes.StrokesChanged += StrokesOnStrokesChanged;

            //Microsoft.Win32.SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
            try {
                if (File.Exists("SpecialVersion.ini")) SpecialVersionResetToSuggestion_Click();
            }
            catch (Exception ex) {
                LogHelper.WriteLogToFile(ex.ToString(), LogHelper.LogType.Error);
            }

            CheckColorTheme(true);
            CheckPenTypeUIState();
        }

        #endregion

        #region Ink Canvas Functions

        private System.Windows.Media.Color Ink_DefaultColor = Colors.Red;

        private DrawingAttributes drawingAttributes;

        private void loadPenCanvas() {
            try {
                //drawingAttributes = new DrawingAttributes();
                drawingAttributes = inkCanvas.DefaultDrawingAttributes;
                drawingAttributes.Color = Ink_DefaultColor;


                drawingAttributes.Height = 2.5;
                drawingAttributes.Width = 2.5;
                drawingAttributes.IsHighlighter = false;
                drawingAttributes.FitToCurve = Settings.Canvas.FitToCurve;

                inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
                inkCanvas.DeleteKeyCommandFired += InkCanvasDeleteCommandFiredEvent;
                //inkCanvas.Gesture += InkCanvas_Gesture;
            }
            catch { }
        }

        private void inkCanvas_EditingModeChanged(object sender, RoutedEventArgs e) {
            var inkCanvas1 = sender as InkCanvas;
            if (inkCanvas1 == null) return;
            if (Settings.Canvas.IsShowCursor) {
                if (inkCanvas1.EditingMode == InkCanvasEditingMode.Ink || drawingShapeMode != 0)
                    inkCanvas1.ForceCursor = true;
                else
                    inkCanvas1.ForceCursor = false;
            } else {
                inkCanvas1.ForceCursor = false;
            }

            if (inkCanvas1.EditingMode == InkCanvasEditingMode.Ink) forcePointEraser = !forcePointEraser;

            if ((inkCanvas1.EditingMode == InkCanvasEditingMode.EraseByPoint &&
                 SelectedMode == ICCToolsEnum.EraseByGeometryMode) || (inkCanvas1.EditingMode == InkCanvasEditingMode.EraseByStroke &&
                                                                       SelectedMode == ICCToolsEnum.EraseByStrokeMode)) {
                GridEraserOverlay.Visibility = Visibility.Visible;
            } else {
                GridEraserOverlay.Visibility = Visibility.Collapsed;
            }

            inkCanvas1.EditingModeInverted = inkCanvas1.EditingMode;

            RectangleSelectionHitTestBorder.Visibility = inkCanvas1.EditingMode == InkCanvasEditingMode.Select ? Visibility.Visible : Visibility.Collapsed;
        }

        #endregion Ink Canvas

        #region Definitions and Loading

        public static Settings Settings = new Settings();
        public static ICCConfiguration SettingsV2 = new ICCConfiguration();
        public static string settingsFileName = "Settings.json";
        public bool isLoaded = false;

        [DllImport("user32.dll")]
        static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

        [DllImport("user32.dll")]
        static extern bool EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);

        [DllImport("user32.dll", SetLastError = true)]
        static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, UInt32 uFlags);

        const uint MF_BYCOMMAND = 0x00000000;
        const uint MF_GRAYED = 0x00000001;
        const uint SC_CLOSE = 0xF060;

        private static void PreloadIALibrary() {
            GC.KeepAlive(typeof(InkAnalyzer));
            GC.KeepAlive(typeof(AnalysisAlternate));
            GC.KeepAlive(typeof(InkDrawingNode));
            var analyzer = new InkAnalyzer();
            analyzer.AddStrokes(new StrokeCollection() {
                new Stroke(new StylusPointCollection() {
                    new StylusPoint(114,514),
                    new StylusPoint(191,9810),
                    new StylusPoint(7,21),
                    new StylusPoint(123,789),
                })
            });
            analyzer.Analyze();
        }

        private async void Window_Loaded(object sender, RoutedEventArgs e) {
            loadPenCanvas();
            //加载设置
            LoadSettings(true);
            // HasNewUpdateWindow hasNewUpdateWindow = new HasNewUpdateWindow();
            if (Environment.Is64BitProcess) SettingsInkRecognitionGroupBox.Visibility = Visibility.Collapsed;

            ThemeManager.Current.ApplicationTheme = ApplicationTheme.Light;
            //SystemEvents_UserPreferenceChanged(null, null);

            //TextBlockVersion.Text = Assembly.GetExecutingAssembly().GetName().Version.ToString();
            LogHelper.WriteLogToFile("Ink Canvas Loaded", LogHelper.LogType.Event);

            var app = Application.Current;

            isLoaded = true;

            InitFloatingToolbarV2();

            BlackBoardLeftSidePageListView.ItemsSource = blackBoardSidePageListViewObservableCollection;
            BlackBoardRightSidePageListView.ItemsSource = blackBoardSidePageListViewObservableCollection;

            BtnLeftWhiteBoardSwitchPreviousGeometry.Brush =
                new SolidColorBrush(System.Windows.Media.Color.FromArgb(127, 24, 24, 27));
            BtnLeftWhiteBoardSwitchPreviousLabel.Opacity = 0.5;
            BtnRightWhiteBoardSwitchPreviousGeometry.Brush =
                new SolidColorBrush(System.Windows.Media.Color.FromArgb(127, 24, 24, 27));
            BtnRightWhiteBoardSwitchPreviousLabel.Opacity = 0.5;

            BorderInkReplayToolBox.Visibility = Visibility.Collapsed;
            BoardBackgroundPopup.Visibility = Visibility.Collapsed;

            // 提前加载IA库，优化第一笔等待时间
            PreloadIALibrary();

            SystemEvents.DisplaySettingsChanged += SystemEventsOnDisplaySettingsChanged;

            if (Settings.Advanced.IsDisableCloseWindow) {
                // Disable close button
                IntPtr hwnd = new WindowInteropHelper(this).Handle;
                IntPtr hMenu = GetSystemMenu(hwnd, false);
                if (hMenu != IntPtr.Zero) {
                    EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | MF_GRAYED);
                }
            }

            UpdateFloatingBarIconsLayout();

            StylusInvertedListenerInit();

            PenPaletteV2Init();
            SelectionV2Init();
            ShapeDrawingV2Init();

            InitStorageManagementModule();

            InitFreezeWindow(new HWND[] {
                new HWND(new WindowInteropHelper(this).Handle)
            });

            UpdateIndexInfoDisplay();

            SetWindowPos(new WindowInteropHelper(this).Handle, new IntPtr(-1), 0, 0, 0, 0, 0x0002|0x0040|0x0001);
        }

        private void SystemEventsOnDisplaySettingsChanged(object sender, EventArgs e) {
            if (!Settings.Advanced.IsEnableResolutionChangeDetection) return;
            ShowNotification($"检测到显示器信息变化，变为{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width}x{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height}");
            new Thread(() => {
                var isFloatingBarOutsideScreen = false;
                var isInPPTPresentationMode = false;
                Dispatcher.Invoke(() => {
                    isFloatingBarOutsideScreen = IsOutsideOfScreenHelper.IsOutsideOfScreen(ViewboxFloatingBar);
                    isInPPTPresentationMode = BorderFloatingBarExitPPTBtn.Visibility == Visibility.Visible;
                });
                if (isFloatingBarOutsideScreen) dpiChangedDelayAction.DebounceAction(3000, null, () => {
                    if (!isFloatingBarFolded)
                    {
                        if (isInPPTPresentationMode) ViewboxFloatingBarMarginAnimation(60);
                        else ViewboxFloatingBarMarginAnimation(100, true);
                    }
                });
            }).Start();
        }

        public DelayAction dpiChangedDelayAction = new DelayAction();

        private void MainWindow_OnDpiChanged(object sender, System.Windows.DpiChangedEventArgs e)
        {
            if (e.OldDpi.DpiScaleX != e.NewDpi.DpiScaleX && e.OldDpi.DpiScaleY != e.NewDpi.DpiScaleY && Settings.Advanced.IsEnableDPIChangeDetection)
            {
                ShowNotification($"系统DPI发生变化，从 {e.OldDpi.DpiScaleX}x{e.OldDpi.DpiScaleY} 变化为 {e.NewDpi.DpiScaleX}x{e.NewDpi.DpiScaleY}");

                new Thread(() => {
                    var isFloatingBarOutsideScreen = false;
                    var isInPPTPresentationMode = false;
                    Dispatcher.Invoke(() => {
                        isFloatingBarOutsideScreen = IsOutsideOfScreenHelper.IsOutsideOfScreen(ViewboxFloatingBar);
                        isInPPTPresentationMode = BorderFloatingBarExitPPTBtn.Visibility == Visibility.Visible;
                    });
                    if (isFloatingBarOutsideScreen) dpiChangedDelayAction.DebounceAction(3000,null, () => {
                        if (!isFloatingBarFolded)
                        {
                            if (isInPPTPresentationMode) ViewboxFloatingBarMarginAnimation(60);
                            else ViewboxFloatingBarMarginAnimation(100, true);
                        }
                    });
                }).Start();
            }
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) {
            LogHelper.WriteLogToFile("Ink Canvas closing", LogHelper.LogType.Event);
            if (!CloseIsFromButton) {
                e.Cancel = true;
            }

            if (e.Cancel) LogHelper.WriteLogToFile("Ink Canvas closing cancelled", LogHelper.LogType.Event);
            else {
                DisposeFreezeFrame();
                Application.Current.Shutdown();
            }
        }

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

        private void MainWindow_OnSizeChanged(object sender, SizeChangedEventArgs e) {
            if (Settings.Advanced.IsEnableForceFullScreen) {
                if (isLoaded) ShowNotification(
                    $"检测到窗口大小变化，已自动恢复到全屏：{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width}x{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height}（缩放比例为{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width / SystemParameters.PrimaryScreenWidth}x{System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height / SystemParameters.PrimaryScreenHeight}）");
                WindowState = WindowState.Maximized;
                MoveWindow(new WindowInteropHelper(this).Handle, 0, 0,
                    System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width,
                    System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height, true);
            }
        }

        private void Window_Closed(object sender, EventArgs e) {
            SystemEvents.DisplaySettingsChanged -= SystemEventsOnDisplaySettingsChanged;

            LogHelper.WriteLogToFile("Ink Canvas closed", LogHelper.LogType.Event);
        }

        private async void AutoUpdate() {
            AvailableLatestVersion = await AutoUpdateHelper.CheckForUpdates();

            if (AvailableLatestVersion != null) {
                var IsDownloadSuccessful = false;
                IsDownloadSuccessful = await AutoUpdateHelper.DownloadSetupFileAndSaveStatus(AvailableLatestVersion);

                if (IsDownloadSuccessful) {
                    if (!Settings.Startup.IsAutoUpdateWithSilence) {
                        if (MessageBox.Show("InkCanvasForClass 新版本安装包已下载完成，是否立即更新？",
                                "InkCanvasForClass New Version Available", MessageBoxButton.YesNo,
                                MessageBoxImage.Question) ==
                            MessageBoxResult.Yes) AutoUpdateHelper.InstallNewVersionApp(AvailableLatestVersion, false);
                    } else {
                        timerCheckAutoUpdateWithSilence.Start();
                    }
                }
            } else {
                AutoUpdateHelper.DeleteUpdatesFolder();
            }
        }

        #endregion Definations and Loading
    }
}