using PDF_Master.Model;
using Prism.Commands;
using System.Data;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
using PDF_Master.CustomControl;
using System.Windows;
using PDF_Master.Helper;
using PDF_Master.Model.Dialog.HomePageToolsDialogs;
using ComPDFKit.PDFDocument;
using System.Drawing;
using DialogResult = Prism.Services.Dialogs.DialogResult;

namespace PDF_Master.ViewModels.Dialog.HomePageToolsDialogs
{
    public class HomePagePictureToPDFDialogViewModel : BindableBase, IDialogAware
    {
        #region 文案

        private string T_title;

        public string T_Title
        {
            get { return T_title; }
            set
            {
                SetProperty(ref T_title, value);
            }
        }

        private string T_addFolder;

        public string T_AddFolder
        {
            get { return T_addFolder; }
            set
            {
                SetProperty(ref T_addFolder, value);
            }
        }

        private string T_addFile;

        public string T_AddFile
        {
            get { return T_addFile; }
            set
            {
                SetProperty(ref T_addFile, value);
            }
        }

        private string T_emptyContext;

        public string T_EmptyContext
        {
            get { return T_emptyContext; }
            set
            {
                SetProperty(ref T_emptyContext, value);
            }
        }

        private string T_settings;

        public string T_Settings
        {
            get { return T_settings; }
            set
            {
                SetProperty(ref T_settings, value);
            }
        }

        private string T_exportTitle;

        public string T_ExportTitle
        {
            get { return T_exportTitle; }
            set
            {
                SetProperty(ref T_exportTitle, value);
            }
        }

        private string T_create;

        public string T_Create
        {
            get { return T_create; }
            set
            {
                SetProperty(ref T_create, value);
            }
        }

        private string T_merge;

        public string T_Merge
        {
            get { return T_merge; }
            set
            {
                SetProperty(ref T_merge, value);
            }
        }

        private void InitString()
        {
            T_Title = App.MainPageLoader.GetString("ImageToPDF_Title");
            T_AddFolder = App.MainPageLoader.GetString("ImageToPDF_AddFolder");
            T_AddFile = App.MainPageLoader.GetString("ImageToPDF_AddFile");
            T_EmptyContext = App.MainPageLoader.GetString("ImageToPDF_EmptyContext");
            T_Settings = App.MainPageLoader.GetString("ImageToPDF_Settings");
            T_ExportTitle = App.MainPageLoader.GetString("ImageToPDF_ExportTitle");
            T_Create = App.MainPageLoader.GetString("ImageToPDF_Create");
            T_Merge = App.MainPageLoader.GetString("ImageToPDF_Merge");
        }

        #endregion

        #region 参数和属性
        private List<string> fileNames;

        private int fileNamesIndex = 0;
        private int FileNameNumber = 0;

        public IDialogService dialogs;

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

        public HomePagePictureToPDFDialogModel pictureToPDFModel = new HomePagePictureToPDFDialogModel();

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

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

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

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

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

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

        private string selectFileName = "File";
        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 ToPDFCommand { get; set; }

        public DelegateCommand ADDPictureCommand { get; set; }

        public DelegateCommand ADDPictureFilesCommand { get; set; }

        public DelegateCommand RemovePictureFileCommand { get; set; }

        public DelegateCommand SelectFileCommand { get; set; }

        #endregion
        public HomePagePictureToPDFDialogViewModel(IDialogService dialogs)
        {
            InitString();
            this.dialogs = dialogs;
            ToPDFCommand = new DelegateCommand(topdf);
            ADDPictureCommand = new DelegateCommand(addpicture);
            ADDPictureFilesCommand = new DelegateCommand(addpicturefiles);
            RemovePictureFileCommand = new DelegateCommand(removepicturefiles);
            SelectFileCommand = new DelegateCommand(selectFile);
            ImagesDataTable.Columns.Add("FileName");
            ImagesDataTable.Columns.Add("FileSize");
            ImagesDataTable.Columns.Add("FileState");
            ImagesCurrentDataTable.Columns.Add("FileState");
            this.dialogs = dialogs;
        }
        #region 逻辑函数
        private void topdf()
        {
            PictureToPDFGridIsEnabled = "False";
            if (pictureToPDFModel.Mode == HomePagePictureToPDFDialogModel.ToPDFFileMode.NewFiles)
            {
                FolderBrowserDialog dlg = new FolderBrowserDialog();
                string saveSelectedPath = "";
                string SaveSelectedPath = "";
                if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    SaveSelectedPath = dlg.SelectedPath.Trim();
                    saveSelectedPath = SaveSelectedPath + "\\";
                }
                else { PictureToPDFGridIsEnabled = "True"; return; }
                fileNamesIndex = 0;
                string fileName = "";
                foreach (var filename in fileNames)
                {
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    try
                    {
                        Image img = Image.FromFile(filename);
                        if (img == null)
                        {
                            ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                            ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                            fileNamesIndex++;
                            continue;
                        }
                   
                   
                    
                    CPDFDocument topdfdoc = CPDFDocument.CreateDocument();
                    FileInfo fileinfo = new FileInfo(filename);
                    JpegInsertPage(ref topdfdoc, filename, fileinfo, img.Width, img.Height);
                    Trace.WriteLine("Path.GetTempPath():" + Path.GetTempPath());
                    fileName = savefilename(filename, saveSelectedPath);
                    topdfdoc.WriteToFilePath(fileName);
                    topdfdoc.Release();
                    string file_size = (((float)fileinfo.Length) / 1024).ToString() + " K";
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                        fileNamesIndex++;
                    }
                     catch
                    {
                        ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        fileNamesIndex++;
                        continue;
                    }
                    
                    //System.Diagnostics.Process.Start("Explorer", "/select," + fileName);
                }
                System.Diagnostics.Process.Start("Explorer", "/select," + fileName);
            }
            if (pictureToPDFModel.Mode == HomePagePictureToPDFDialogModel.ToPDFFileMode.OneNewFile)
            {

                CPDFDocument topdfdoc = CPDFDocument.CreateDocument();
                int pageindex = 0;
                FolderBrowserDialog folderDialog = new FolderBrowserDialog();
                System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();
                sfd.FileName = "Untitle";
                sfd.Filter = "PDF|*.pdf;";
                string NewFileName = "";
                if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    NewFileName = sfd.FileName;
                }
                else { PictureToPDFGridIsEnabled = "True"; return; }
                foreach (var filename in fileNames)
                {
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    Image img = Image.FromFile(filename);
                    if (img == null)
                    {
                        ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        continue;
                    }
                    FileInfo fileinfo = new FileInfo(filename);
                    JpegInsertPage(ref topdfdoc, filename, fileinfo, img.Width, img.Height, pageindex);
                    pageindex++;
                    string file_size = (((float)fileinfo.Length) / 1024).ToString() + " K";
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                    fileNamesIndex++;
                }
                System.Diagnostics.Process.Start("Explorer", "/select," + NewFileName);
                topdfdoc.WriteToFilePath(NewFileName);
                topdfdoc.Release();
            }
            if (pictureToPDFModel.Mode == HomePagePictureToPDFDialogModel.ToPDFFileMode.SelectFileName)
            {
                FolderBrowserDialog dlg = new FolderBrowserDialog();
                string saveSelectedPath = "";
                if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    saveSelectedPath = dlg.SelectedPath.Trim();
                    saveSelectedPath = saveSelectedPath + "\\";
                }
                else { PictureToPDFGridIsEnabled = "True"; return; }
                CPDFDocument topdfdoc = CPDFDocument.InitWithFilePath(pictureToPDFModel.FilePath);
                if (topdfdoc == null)
                {
                    Trace.WriteLine("Document==null");
                    //TODO
                    MessageBoxEx.Show("文档为空");
                    PictureToPDFGridIsEnabled = "True";
                    return;

                }
                if (topdfdoc.IsLocked)
                {
                    DialogParameters value = new DialogParameters();
                    value.Add(ParameterNames.PDFDocument, topdfdoc);
                    dialogs.ShowDialog(DialogNames.VerifyPassWordDialog, value, e =>
                    {
                        if (e.Result == ButtonResult.OK)
                        {
                            if (e.Parameters.ContainsKey(ParameterNames.PassWord) && e.Parameters.GetValue<string>(ParameterNames.PassWord) != null)
                            {
                                topdfdoc.UnlockWithPassword(e.Parameters.GetValue<string>(ParameterNames.PassWord).ToString());
                            }
                        }
                    });

                    if (topdfdoc.IsLocked)
                    {
                        //未成功解密文档时，释放Document对象，返回
                        ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        fileNamesIndex++;
                        PictureToPDFGridIsEnabled = "True";
                        return;
                    }
                }
                int pageindex = topdfdoc.PageCount;
                foreach (var filename in fileNames)
                {
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "wait";
                    Image img = Image.FromFile(filename);
                    if (img == null)
                    {
                        ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        continue;
                    }
                    FileInfo fileinfo = new FileInfo(filename);
                    JpegInsertPage(ref topdfdoc, filename, fileinfo, img.Width, img.Height, pageindex);
                    pageindex++;
                    string file_size = (((float)fileinfo.Length) / 1024).ToString() + " K";
                    ImagesDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                    ImagesCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                    fileNamesIndex++;
                }
                string saveselectedpath = CommonHelper.CreateFilePath(saveSelectedPath + topdfdoc.FileName + ".pdf");
                topdfdoc.WriteToFilePath(saveselectedpath);
                System.Diagnostics.Process.Start("Explorer", "/select," + saveselectedpath);
                topdfdoc.Release();
            }
            PictureToPDFGridIsEnabled = "True";
            fileNamesIndex = 0;
        }

        /// <summary>
        /// 设置保存后的文件名
        /// </summary>
        public string savefilename(string filename, string filepath)
        {
            FileInfo file = new FileInfo(filename);
            return CommonHelper.CreateFilePath(filepath + pictureToPDFModel.FrontFileNameLabel + file.Name.Replace(file.Extension, ".pdf") + pictureToPDFModel.RearFileNameLabel);
        }
        #endregion

        #region 批量处理逻辑函数
        /// <summary>
        /// 选择PDF文件
        /// </summary>
        private void selectFile()
        {
            System.Windows.Forms.OpenFileDialog dlg = new System.Windows.Forms.OpenFileDialog();
            dlg.Multiselect = false;
            dlg.Filter = "PDF|*.pdf;*.PDF;";
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                SelectFileName = dlg.FileName;
                pictureToPDFModel.FilePath = dlg.FileName;
                ImageToPDFBtnIsEnable = "True";
            }
        }

        /// <summary>
        /// 添加图片文件
        /// </summary>
        private void addpicture()
        {
            FileNameNumber = fileNames.Count;
            System.Windows.Forms.OpenFileDialog dlg = new System.Windows.Forms.OpenFileDialog();
            dlg.Multiselect = true;
            dlg.Filter = "Picture|*.png;*.PNG;*.jpg;*.JPG;*.bmp;*.gif;*tiff;*jpeg;";
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                fileNames.AddRange(dlg.FileNames.ToList());
                RemoveExcess(ref fileNames);
                SetPictureToPDFGridIsEnabled = "True";
                AddFileVisibility = Visibility.Hidden;
                RemoveIsEnable = "True";
                updateListview("wait");
            }
        }
        public void addPicture(string filename)
        {
            FileNameNumber = fileNames.Count;
            fileNames.Add(filename);
            RemoveExcess(ref fileNames);
            SetPictureToPDFGridIsEnabled = "True";
            AddFileVisibility = Visibility.Hidden;
            RemoveIsEnable = "True";
            updateListview("wait");
        }
        /// <summary>
        /// 添加图片文件夹
        /// </summary>
        private void addpicturefiles()
        {
            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 == ".png" || fi.Extension == ".jpg" || fi.Extension == ".jpeg" || fi.Extension == ".bmp" || fi.Extension == ".gif" || fi.Extension == ".tiff")
                    {
                        fileNames.Add(app);
                    }
                }
                RemoveExcess(ref fileNames);
                updateListview("wait");
                SetPictureToPDFGridIsEnabled = "True";
                AddFileVisibility = Visibility.Hidden;
                RemoveIsEnable = "True";
            }
        }

        /// <summary>
        /// 删除图片文件
        /// </summary>
        /// 
        public void removepicturefiles()
        {if (fileNamesView.Count > 0)
            { removepicturefile(); }
            else
            {
                FileNameNumber = fileNames.Count;

                //Trace.WriteLine(filenamesview);
                fileNames.Clear();

                if (fileNames.Count < 1)
                {
                    SetPictureToPDFGridIsEnabled = "False";
                    AddFileVisibility = Visibility.Visible;
                    RemoveIsEnable = "False";
                }
                updateListview("wait");
            }
           
        }

        public void removepicturefile()
        {
            FileNameNumber = fileNames.Count;
            Reverseorder(ref fileNamesView);
            foreach (int filenamesview in fileNamesView)
            {
                //Trace.WriteLine(filenamesview);
                fileNames.Remove(fileNames[filenamesview]);
            }
            if (fileNames.Count < 1)
            {
                SetPictureToPDFGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
                RemoveIsEnable = "False";
            }
            updateListview("wait");
        }
        public void removepdffile(int index)
        {
            ImagesCurrentDataTable.Rows.RemoveAt(index);
            fileNames.Remove(fileNames[index]);

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

            updateListview("wait");
        }

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

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

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

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

        /// <summary>
        /// 更新Currentlistview显示
        /// pagerangetext 自定义页面范围字符串  pagerangeselectindex combobox下拉索引（0全部页面 1奇数页 2偶数页 3自定义页面）isevenpageisenabled 偶数页状态 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++)
                {
                    ImagesCurrentDataTable.Rows.Add(state);
                }
            }
            else
            {
                Reverseorder(ref fileNamesView);
                foreach (int filenamesview in fileNamesView)
                {
                    ImagesCurrentDataTable.Rows.RemoveAt(filenamesview);
                }
            }
        }
        #endregion

        #region 图片转换
        /// <summary>
        /// 图片转PNG
        /// picturefile 图片文件名
        /// filePath 保存路径
        /// </summary>
        public bool SavePng(string picturefile, string filePath)
        {
            Image img = Image.FromFile(picturefile);
            try
            {
                using (var bmp = new Bitmap(img.Width, img.Height))
                {
                    bmp.SetResolution(img.HorizontalResolution, img.VerticalResolution);

                    using (var g = Graphics.FromImage(bmp))
                    {
                        g.Clear(Color.White);
                        g.DrawImageUnscaled(img, 0, 0);
                    }
                    bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);
                }
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// <summary>
        /// 图片转JPeG
        /// picturefile 图片文件名
        /// filePath 保存路径
        /// </summary>
        public bool SaveJpeg(string picturefile, string filePath)
        {
            Image img = Image.FromFile(picturefile);
            try
            {
                using (var bmp = new Bitmap(img.Width, img.Height))
                {
                    bmp.SetResolution(img.HorizontalResolution, img.VerticalResolution);

                    using (var g = Graphics.FromImage(bmp))
                    {
                        g.Clear(Color.White);
                        g.DrawImageUnscaled(img, 0, 0);
                    }
                    //存储各种格式
                    //bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Gif);
                    //bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);
                    bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
                }
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// <summary>
        /// 插入JPeG图片
        /// topdfdoc 所要插入的文档
        /// filename 图片文件名
        /// fileinfo 文件信息
        /// width page宽
        /// height page高
        /// index 插入位置
        /// </summary>
        private void JpegInsertPage(ref CPDFDocument topdfdoc, string filename, FileInfo fileinfo, int width, int height, int index = 0)
        {

            string tempFileName = "";
            if (fileinfo.Extension == ".jpg" || fileinfo.Extension == ".jpeg")
            {
                topdfdoc.InsertPage(index, width, height, filename);
            }
            else
            {
                tempFileName = Path.GetTempPath() + "pngtemp.jpg";
                if (!PictureConverter.SaveJpeg(filename, tempFileName))
                {
                    MessageBoxEx.Show("图片格式有问题");
                }
                topdfdoc.InsertPage(index, width, height, tempFileName);
            }
        }

        public void CloseDialoge() { RequestClose?.Invoke(new DialogResult(ButtonResult.OK)); }
        #endregion

        #region 构架行为
        public string Title => "图片转PDF";

        public event Action<IDialogResult> RequestClose;

        public bool CanCloseDialog()
        {
            return true;
        }

        public void OnDialogClosed()
        {
        }

        public void OnDialogOpened(IDialogParameters parameters)
        {
            string[] filepath = null;
            parameters.TryGetValue<string[]>(ParameterNames.FilePath, out filepath);
            if (filepath != null)
            {
                fileNames = filepath.ToList();

                updateListview("wait");
            }
        }
        #endregion
    }
}