using ComPDFKit.PDFPage;
using compdfkit_tools.Edit;
using compdfkit_tools.PDFControl;
using ComPDFKitViewer;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
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 System.Xml.Linq;

namespace edit_ctrl_demo
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window,INotifyPropertyChanged
    {
        /// <summary>
        /// 是否能够撤销
        /// </summary>
        public bool CanUndo
        {
            get
            {
                if (PDFView != null)
                {
                    return PDFView.UndoManager.CanUndo;
                }
                return false;
            }
        }

        /// <summary>
        /// 是否能够重做
        /// </summary>
        public bool CanRedo
        {
            get
            {
                if (PDFView != null)
                {
                    return PDFView.UndoManager.CanRedo;
                }
                return false;
            }
        }

        /// <summary>
        /// 上一次的PDF编辑对象
        /// </summary>
        private PDFEditEvent lastPDFEditEvent = null;

        /// <summary>
        /// 缩放比例
        /// </summary>
        private double[] zoomLevel = { 1.00f, 8f, 12f, 25, 33f, 50, 66f, 75, 100, 125, 150, 200, 300, 400, 600, 800, 1000 };

        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;
            DataContext = this;
        }

        /// <summary>
        /// 属性更改事件
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        ///触发属性更改事件通知
        /// </summary>
        protected void OnPropertyChanged([CallerMemberName] string name = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            LoadDefaultDocument();
            TitleBarTool.OpenFileEvent += TitleBarTool_OpenFileEvent;
            PDFView.PDFEditActiveHandler += PDFView_PDFEditActiveHandler;
            PDFView.UndoManager.PropertyChanged += UndoManager_PropertyChanged;
            PDFView.PDFEditCommandHandler += PDFView_PDFEditCommandHandler;
            PDFView.MouseWheelZoomHandler += PDFView_MouseWheelZoomHandler;
        }

        /// <summary>
        /// 鼠标滚轮缩放事件
        /// </summary>
        private void PDFView_MouseWheelZoomHandler(object sender, bool e)
        {
            double newZoom = CheckZoomLevel(PDFView.ZoomFactor + (e ? 0.01 : -0.01), e);
            PDFView?.Zoom(newZoom);
        }

        /// <summary>
        /// 检查缩放比例
        /// </summary>
        private double CheckZoomLevel(double zoom, bool IsGrowth)
        {
            double standardZoom = 100;
            if (zoom <= 0.01)
            {
                return 0.01;
            }
            if (zoom >= 10)
            {
                return 10;
            }

            zoom *= 100;
            for (int i = 0; i < zoomLevel.Length - 1; i++)
            {
                if (zoom > zoomLevel[i] && zoom <= zoomLevel[i + 1] && IsGrowth)
                {
                    standardZoom = zoomLevel[i + 1];
                    break;
                }
                if (zoom >= zoomLevel[i] && zoom < zoomLevel[i + 1] && !IsGrowth)
                {
                    standardZoom = zoomLevel[i];
                    break;
                }
            }
            return standardZoom / 100;
        }

        /// <summary>
        /// 文字编辑和图片编辑右键点击处理
        /// </summary>
        private void PDFView_PDFEditCommandHandler(object sender, PDFEditCommand e)
        {
            if (e == null)
            {
                return;
            }

            if(e.EditType==CPDFEditType.EditText)
            {
                e.Handle = true;
                PDFEditTextContextMenu(sender,e);
            }

            if(e.EditType==CPDFEditType.EditImage)
            {
                e.Handle = true;
                PDFEditImageContextMenu(sender, e);
            }
        }

        /// <summary>
        /// 撤销重做状态更新事件通知
        /// </summary>
        private void UndoManager_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            OnPropertyChanged(e.PropertyName);
        }

        /// <summary>
        /// 文字或图片块选中事件
        /// </summary>
        private void PDFView_PDFEditActiveHandler(object sender, PDFEditEvent e)
        {
            PDFEditEvent tempEvent = lastPDFEditEvent;
            lastPDFEditEvent = e;
            if (e == null)
            {
                PDFEditContainer.Child= null;
                return;
            }
           
            if (Mouse.RightButton==MouseButtonState.Pressed)
            {
                return;
            }

            if (e.EditType == CPDFEditType.EditText)
            {
                PDFTextEditControl textEditControl = new PDFTextEditControl();
                textEditControl.SetPDFTextEditData(e);
                PDFEditContainer.Child = textEditControl;
                return;
            }

            if (e.EditType == CPDFEditType.EditImage)
            {
                PDFImageEditControl imageEditControl = new PDFImageEditControl();
                imageEditControl.InitWithPDFViewer(PDFView);
                imageEditControl.SetPDFImageEditData(e);
                PDFEditContainer.Child = imageEditControl;
                return;
            }
        }

        /// <summary>
        /// 工具栏选择文件对话框事件通知
        /// </summary>
        private void TitleBarTool_OpenFileEvent(object sender, string filePath)
        {
            ClearPDFEditState();
            PDFView?.CloseDocument();
            PDFView?.InitDocument(filePath);
            PDFView?.Load();
            PDFView?.SetMouseMode(MouseModes.PanTool);
        }

        /// <summary>
        /// 加载显示默认文档
        /// </summary>
        private void LoadDefaultDocument()
        {
            string defaultFilePath = "..\\..\\..\\..\\developer_guide_windows.pdf";
            PDFView?.InitDocument(defaultFilePath);
            PDFView?.Load();
        }

        /// <summary>
        /// 文字编辑模式
        /// </summary>
        private void PDFTextEditButton_Click(object sender, RoutedEventArgs e)
        {
            ToggleButton senderBtn=sender as ToggleButton;
            if(senderBtn != null)
            {
                ClearPDFEditState(senderBtn);
                if (senderBtn.IsChecked == true)
                {
                    PDFView?.SetPDFEditType(CPDFEditType.EditText);
                    PDFView?.SetPDFEditCreateType(CPDFEditType.EditText);
                    PDFView?.SetMouseMode(MouseModes.PDFEdit);
                    PDFView?.ReloadDocument();
                }
                else
                {
                    PDFView?.SetPDFEditType(CPDFEditType.None);
                    PDFView?.SetMouseMode(MouseModes.PanTool);
                    PDFView?.ReloadDocument();
                }
            }
        }

        /// <summary>
        /// 图片编辑模式
        /// </summary>
        private void PDFImageEditButton_Click(object sender, RoutedEventArgs e)
        {
            ToggleButton senderBtn = sender as ToggleButton;
            if (senderBtn != null)
            {
                ClearPDFEditState(senderBtn);
                senderBtn.IsChecked = false;
                PDFView?.SetPDFEditType(CPDFEditType.EditImage);
                PDFView?.SetMouseMode(MouseModes.PDFEdit);
                PDFView?.ReloadDocument();
                OpenFileDialog openFileDialog = new OpenFileDialog();
                openFileDialog.Filter = "Image Files(*.jpg;*.jpeg;*.png;*.bmp)|*.jpg;*.jpeg;*.png;*.bmp;";
                if (openFileDialog.ShowDialog() == true)
                {
                    PDFView?.SetPDFEditCreateType(CPDFEditType.EditImage);
                    PDFView?.AddPDFEditImage(openFileDialog.FileName);
                }
            }
        }

        /// <summary>
        /// 清除编辑相关按钮选中状态
        /// </summary>
        private void ClearPDFEditState(ToggleButton ignoreBtn=null)
        {
            List<ToggleButton> clearBtnList = new List<ToggleButton>()
            { 
                PDFTextEditButton,
                PDFImageEditButton,
                PDFEditBtn,
            };

            foreach (ToggleButton item in clearBtnList)
            {
                if(ignoreBtn==item)
                {
                    continue;
                }
                item.IsChecked = false;
            }
            
            PDFEditContainer.Child = null;
        }

        /// <summary>
        /// 撤销操作
        /// </summary>
        private void UndoBtn_Click(object sender, RoutedEventArgs e)
        {
            PDFView?.UndoManager?.Undo();
        }

        /// <summary>
        /// 重做操作
        /// </summary>
        private void RedoBtn_Click(object sender, RoutedEventArgs e)
        {
            PDFView?.UndoManager?.Redo();
        }

        /// <summary>
        /// 文字编辑右键菜单
        /// </summary>
       
        private void PDFEditTextContextMenu(object sender,PDFEditCommand editCommand)
        {
            editCommand.PopupMenu = new ContextMenu();
            if (lastPDFEditEvent != null)
            {
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "复制", Command = ApplicationCommands.Copy, CommandTarget = (UIElement)sender });
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "剪切", Command = ApplicationCommands.Cut, CommandTarget = (UIElement)sender });
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "删除", Command = ApplicationCommands.Delete, CommandTarget = (UIElement)sender });
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "粘贴", Command = ApplicationCommands.Paste, CommandTarget = (UIElement)sender });
                MenuItem propertyMenu = new MenuItem();
                propertyMenu.Header = "属性";
                propertyMenu.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditText)
                    {
                        PDFTextEditControl textEditControl = new PDFTextEditControl();
                        textEditControl.SetPDFTextEditData(lastPDFEditEvent);
                        PDFEditContainer.Child = textEditControl;
                    }
                };
                editCommand.PopupMenu.Items.Add(propertyMenu);
            }
            else
            {
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "粘贴", Command = ApplicationCommands.Paste, CommandTarget = (UIElement)sender });
                if(editCommand.TextAreaCopied)
                {
                    editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "粘贴样式", Command = CustomCommands.PasteMatchStyle, CommandTarget = (UIElement)sender });
                }
            }
        }

        /// <summary>
        /// 图片编辑右键菜单
        /// </summary>
        private void PDFEditImageContextMenu(object sender, PDFEditCommand editCommand)
        {
            editCommand.PopupMenu = new ContextMenu();
            if(lastPDFEditEvent!=null)
            {
                MenuItem rotateLeftMenu = new MenuItem();
                rotateLeftMenu.Header = "左旋转";
                rotateLeftMenu.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.Rotate = -90;
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                editCommand.PopupMenu.Items.Add(rotateLeftMenu);

                MenuItem rotateRightMenu = new MenuItem();
                rotateRightMenu.Header = "右旋转";
                rotateRightMenu.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.Rotate = 90;
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                editCommand.PopupMenu.Items.Add(rotateRightMenu);

                MenuItem replaceMenu = new MenuItem();
                replaceMenu.Header = "替换";
                replaceMenu.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        OpenFileDialog openFileDialog = new OpenFileDialog();
                        openFileDialog.Filter = "Image Files(*.jpg;*.jpeg;*.png;*.bmp)|*.jpg;*.jpeg;*.png;*.bmp;";
                        if (openFileDialog.ShowDialog() == true)
                        {
                            lastPDFEditEvent.ReplaceImagePath = openFileDialog.FileName;
                            lastPDFEditEvent.UpdatePDFEditByEventArgs();
                            PDFView?.ClearSelectPDFEdit();
                        }
                    }
                };
                editCommand.PopupMenu.Items.Add(replaceMenu);

                MenuItem exportMenu = new MenuItem();
                exportMenu.Header = "导出";
                exportMenu.Click += (o, p) =>
                {
                    if (PDFView != null)
                    {
                        Dictionary<int, List<Bitmap>> imageDict = PDFView.GetSelectedImages();
                        if (imageDict != null && imageDict.Count > 0)
                        {
                            System.Windows.Forms.FolderBrowserDialog folderBrowser = new System.Windows.Forms.FolderBrowserDialog();
                            if (folderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                            {
                                string choosePath = folderBrowser.SelectedPath;
                                string openPath = choosePath;
                                try
                                {
                                    foreach (int pageIndex in imageDict.Keys)
                                    {
                                        List<Bitmap> imageList = imageDict[pageIndex];
                                        foreach (Bitmap image in imageList)
                                        {
                                            string savePath = System.IO.Path.Combine(choosePath, Guid.NewGuid() + ".jpg");
                                            image.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
                                            openPath = savePath;
                                        }
                                    }
                                    Process.Start("explorer", "/select,\"" + openPath + "\"");
                                }
                                catch (Exception ex)
                                {

                                }
                            }
                        }
                    }
                };
                editCommand.PopupMenu.Items.Add(exportMenu);

                MenuItem opacityMenu = new MenuItem();
                opacityMenu.Header = "透明度";
                editCommand.PopupMenu.Items.Add(opacityMenu);

                AppendOpacityMenu(opacityMenu);

                MenuItem horizonMirror = new MenuItem();
                horizonMirror.Header = "水平镜像";
                horizonMirror.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.HorizontalMirror = true;
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                editCommand.PopupMenu.Items.Add(horizonMirror);

                MenuItem verticalMirror = new MenuItem();
                verticalMirror.Header = "垂直镜像";
                verticalMirror.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.VerticalMirror = true;
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                editCommand.PopupMenu.Items.Add(verticalMirror);

                MenuItem cropMenu = new MenuItem();
                cropMenu.Header = "裁剪";
                cropMenu.Click += (o, p) =>
                {
                    if (lastPDFEditEvent != null && lastPDFEditEvent.EditType == CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.ClipImage = true;
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                editCommand.PopupMenu.Items.Add(cropMenu);

                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "复制", Command = ApplicationCommands.Copy, CommandTarget = (UIElement)sender });
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "剪切", Command = ApplicationCommands.Cut, CommandTarget = (UIElement)sender });
                editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "删除", Command = ApplicationCommands.Delete, CommandTarget = (UIElement)sender });
            }
            else
            {
                if(Clipboard.ContainsImage())
                {
                    editCommand.PopupMenu.Items.Add(new MenuItem() { Header = "粘贴", Command = ApplicationCommands.Paste, CommandTarget = (UIElement)sender });
                }
            }
        }

        /// <summary>
        /// 图片编辑透明度二级菜单
        /// </summary>
        private void AppendOpacityMenu(MenuItem parentMenu)
        {
            List<int> opacityList = new List<int>()
            {
                25,50,75,100
            };

            foreach(int opacity in opacityList)
            {
                MenuItem opacityMenu = new MenuItem();
                opacityMenu.Header = string.Format("{0}%", opacity);
                opacityMenu.Click += (o, p) =>
                {
                    if(lastPDFEditEvent != null && lastPDFEditEvent.EditType==CPDFEditType.EditImage)
                    {
                        lastPDFEditEvent.Transparency = (int) Math.Ceiling(opacity * 255 / 100D);
                        lastPDFEditEvent.UpdatePDFEditByEventArgs();
                    }
                };
                parentMenu.Items.Add(opacityMenu);
            }
        }

        /// <summary>
        /// 进入文字和图片编辑
        /// </summary>
        private void PDFEditBtn_Click(object sender, RoutedEventArgs e)
        {
            ToggleButton senderBtn = sender as ToggleButton;
            if (senderBtn != null)
            {
                ClearPDFEditState(senderBtn);
                if (senderBtn.IsChecked == true)
                {
                    PDFView?.SetPDFEditType(CPDFEditType.EditText|CPDFEditType.EditImage);
                    PDFView?.SetPDFEditCreateType(CPDFEditType.None);
                    PDFView?.SetMouseMode(MouseModes.PDFEdit);
                    PDFView?.ReloadDocument();
                }
                else
                {
                    PDFView?.SetPDFEditType(CPDFEditType.None);
                    PDFView?.SetMouseMode(MouseModes.PanTool);
                    PDFView?.ReloadDocument();
                }
            }
        }
    }
}