using ComPDFKitViewer.PdfViewer;
using PDF_Office.EventAggregators;
using PDF_Office.Model.EditTools.Background;
using PDF_Office.Model;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using PDF_Office.Model.EditTools.Watermark;
using ComPDFKit.PDFDocument;
using ComPDFKit.PDFPage;
using System.Windows.Media.Imaging;
using System.Windows.Media;
using System.Threading.Tasks;
using ComPDFKit.PDFWatermark;
using PDF_Office.Helper;
using PDF_Office.Model.Dialog.HomePageToolsDialogs.HomePagePrinter;
using System.Drawing;
using System.Windows;
using ComPDFKitViewer;
using Size = System.Windows.Size;
using System.Diagnostics;
using System.Windows.Controls;
using ComPDFKit.Import;

namespace PDF_Office.ViewModels.EditTools.Watermark
{
    public class WatermarkDocumentContentViewModel : BindableBase, INavigationAware
    {

        public IEventAggregator eventAggregator;
        public IRegionManager regionManager;
        public CPDFViewer PDFViewer;
        public CPDFDocument Document;
        private CPDFWatermark watermark;

        private CPDFBackground background;
        private WatermarkInfo watermarkInfo;


        public bool firstin = true;

        public string ViewerRegionName { get; set; }

        private ImageSource _imageSource = null;
        public ImageSource ImageSource
        {
            get { return _imageSource; }
            set
            {
                SetProperty(ref _imageSource, value);
            }
        }

        public WatermarkDocumentContentViewModel(IEventAggregator eventAggregator, IRegionManager regionManager)
        {
            this.regionManager = regionManager;
            this.eventAggregator = eventAggregator;
            eventAggregator.GetEvent<SetWatermarkEvent>().Subscribe(SetWatermark);
            ViewerRegionName = RegionNames.WatermarkViwerRegionName;

        }

        public void SetWatermark(WatermarkInfo watermarkInfo)
        {
            this.watermarkInfo = watermarkInfo;
            //CreateWatermark(PDFViewer.Document);
            //PDFViewer.Document.PdfToImage("0-1", "C:\\Users\\kdanmobile\\Desktop\\888\\");
            //PDFViewer.Document.WriteToFilePath("C:\\Users\\kdanmobile\\Desktop\\888\\sb22222.pdf");
            PDFViewer.InvalidChildVisual(false);
        }

        public void CreateWatermark(CPDFDocument document, bool IsNewDoc = false)
        {
            if (watermarkInfo != null) { 
                background = document.GetBackground();

            background.SetBackgroundType(C_Background_Type.BG_TYPE_COLOR);

            background.SetScale(1);
            background.SetColor(watermarkInfo.TextColor);

            background.SetRotation(0);
            background.SetOpacity(255);
            background.SetVertalign(C_Background_Vertalign.BG_VERTALIGN_CENTER);
            background.SetHorizalign(C_Background_Horizalign.BG_HORIZALIGN_CENTER);
            background.SetYOffset(0);
            background.SetXOffset(0);
            background.SetAllowsPrint(true);
            background.SetAllowsView(true);
            background.SetPages("0");
            background.Update();
        }
            //if (watermarkInfo != null)
            //{
            //    document.DeleteWatermarks();
            //    if (watermarkInfo.WatermarkType == C_Watermark_Type.WATERMARK_TYPE_TEXT)
            //    {
            //        watermark = document.InitWatermark(C_Watermark_Type.WATERMARK_TYPE_TEXT);
            //        watermark.SetText(watermarkInfo.Text);
            //        if (watermarkInfo.TextSize == null)
            //        {
            //            watermarkInfo.TextSize = "6";
            //        }
            //        watermark.SetFontName(watermarkInfo.FontName);
            //        watermark.SetFontSize(float.Parse(watermarkInfo.TextSize));
            //        watermark.SetTextRGBColor(watermarkInfo.TextColor);
            //    }
            //    else
            //    {

            //        watermark = document.InitWatermark(C_Watermark_Type.WATERMARK_TYPE_IMG);
            //        if (watermarkInfo.ImageArray != null)
            //        {
            //            watermark.SetImage(watermarkInfo.ImageArray, watermarkInfo.ImageWidth, watermarkInfo.ImageHeight);
            //        }
            //        watermark.SetScale(0.1f);
            //    }
            //    watermark.SetRotation(watermarkInfo.Rotation);
            //    watermark.SetOpacity(watermarkInfo.Opacity);
            //    watermark.SetFront(watermarkInfo.IsFront);
            //    watermark.SetVertalign(watermarkInfo.WatermarkVertalign);
            //    watermark.SetHorizalign(watermarkInfo.WatermarkHorizalign);
            //    watermark.SetFullScreen(watermarkInfo.Isfull);
            //    watermark.SetVertOffset(watermarkInfo.VertOffset);
            //    watermark.SetHorizOffset(watermarkInfo.HorizOffset);
            //    watermark.SetHorizontalSpacing(watermarkInfo.HorizontalSpacing);
            //    watermark.SetVerticalSpacing(watermarkInfo.VerticalSpacing);
            //    if (IsNewDoc) { watermark.SetPages("0");  }
            //    else { watermark.SetPages(watermarkInfo.PageRange); }
            //    watermark.CreateWatermark();
            //    watermark.UpdateWatermark();
            //}
        }


        private void UndoManager_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
        }

        private void CurrentViewer_CustomDrawHandler(object sender, CustomDrawData e)
        {
            if (e.DrawPages.Count > 0 && e.DrawContext != null)
            {
                List<int> PageIndexLists = new List<int>();
                foreach (DrawPageData drawPageData in e.DrawPages)
                {   
                    if(watermarkInfo != null) {
                        char[] enumerationSeparator = new char[] { ',' };
                        char[] rangeSeparator = new char[] { '-' };
                        if (CommonHelper.GetPagesInRange(ref PageIndexLists, watermarkInfo.PageRange, Document.PageCount, enumerationSeparator, rangeSeparator, true))
                        { //TODO
                            Trace.WriteLine(CommonHelper.GetPagesInRange(ref PageIndexLists, watermarkInfo.PageRange, Document.PageCount, enumerationSeparator, rangeSeparator, true));
                            Trace.WriteLine(drawPageData.PageIndex);
                            foreach (var abbb in PageIndexLists ) {

                                Trace.WriteLine("smgui _______"+abbb);
                            }
                            if (PageIndexLists.Contains(drawPageData.PageIndex-1)) {
                                
                                WriteableBitmap waterMarkBitmap = GetWaterMark(PDFViewer.Document, e.Zoom, drawPageData.PageIndex);
                                e.DrawContext.DrawImage(waterMarkBitmap, drawPageData.PageBound);
                            }
                        }
                    }
                }
            }
        }
        private WriteableBitmap GetWaterMark(CPDFDocument oldDoc, double zoom, int pageIndex)
        {
            Size pageSize = oldDoc.GetPageSize(pageIndex);

            CPDFDocument newDoc = CPDFDocument.CreateDocument();
            newDoc.InsertPage(0, pageSize.Width, pageSize.Height, null);
            CreateWatermark(newDoc,true);
            CPDFPage newPage = newDoc.PageAtIndex(0);
            double scale = 96.0 / 72.0;
            zoom = zoom * scale;
            Rect renderRect = new Rect(0, 0, (int)(pageSize.Width * scale), (int)(pageSize.Height * scale));
            byte[] imageArray = new byte[(int)(renderRect.Width * renderRect.Height * 4)];
            newPage.RenderPageBitmapWithMatrix((float)zoom, renderRect, 0x00FFFFFF, imageArray, 1, true);
            WriteableBitmap WirteBitmap = new WriteableBitmap((int)renderRect.Width, (int)renderRect.Height, 96, 96, PixelFormats.Bgra32, null);
            WirteBitmap.WritePixels(new Int32Rect(0, 0, (int)renderRect.Width, (int)renderRect.Height), imageArray, WirteBitmap.BackBufferStride, 0);
            return WirteBitmap;
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {

        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            CPDFViewer pdfViewer;
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out pdfViewer);
            if (pdfViewer != null)
            {
                if (!regionManager.Regions[ViewerRegionName].Views.Contains(PDFViewer))
                {
                    PDFViewer = new CPDFViewer();
                    PDFViewer.InitDocument(pdfViewer.Document.FilePath);
                    Document = PDFViewer.Document;
                    PDFViewer.CustomDrawHandler += CurrentViewer_CustomDrawHandler;
                    PDFViewer.UndoManager.PropertyChanged += UndoManager_PropertyChanged;
                    regionManager.AddToRegion(ViewerRegionName, PDFViewer);
                    PDFViewer.SetAnnotInteraction(!PDFViewer.GetAnnotInteraction());
                    PDFViewer.Load();
                    PDFViewer.ChangeViewMode(ViewMode.Single);
                    PDFViewer.SetMouseMode(MouseModes.Default);
                }
            }
        }
    }
}