//
// Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved.
//

using System;
using System.IO;
using System.Collections;
using pdftron;
using pdftron.Common;
using pdftron.Filters;
using pdftron.SDF;
using pdftron.PDF;
using pdftron.PDF.Annots;

namespace PDFPageTestCS
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Class1
	{
		private static pdftron.PDFNetLoader pdfNetLoader = pdftron.PDFNetLoader.Instance();
		static Class1() {}
		
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			PDFNet.Initialize();
			
			try
			{
				using (PDFDoc sink = new PDFDoc(PATH_TO_MASTER_PDF))
				{
					sink.InitSecurityHandler();

					// assume all the external PDF links annots are on the last page only.
					ArrayList docsToMerge = new ArrayList();
					Page sinkLastPage = sink.GetPage(sink.GetPageCount());
					for(int i = 0; i < sinkLastPage.GetNumAnnots(); ++i)
                    {
						Annot annot = sinkLastPage.GetAnnot(i);
						if (!annot.IsValid() || annot.GetType() != Annot.Type.e_Link) continue;

						Link lnk = new Link(annot);
                        pdftron.PDF.Action action = lnk.GetAction();
						if (!action.IsValid()) continue;

                        if (action.GetType() == pdftron.PDF.Action.Type.e_URI)
                        {
                            string uri = action.GetSDFObj().Get("URI").Value().GetAsPDFText();
                            //System.Console.WriteLine("  Links to: " + uri);

                            string rootFolder = ROOT_FOLDER_CONTAINING_EXTERNAL_PDFS;
							try
                            {
								int index = sink.GetPageCount() + 1;
								PDFDoc source = new PDFDoc(rootFolder + uri);
								source.InitSecurityHandler();
								ArrayList importList = new ArrayList();
								for (PageIterator itr = source.GetPageIterator(); itr.HasNext(); itr.Next())
                                {
									importList.Add(itr.Current());
								}
								ArrayList importedPages = sink.ImportPages(importList);
								foreach(object o in importedPages)
                                {
									Page page = o as Page;
									sink.PagePushBack(page);
								}
								Page destPage = sink.GetPage(index);
								pdftron.PDF.Destination newDest = pdftron.PDF.Destination.CreateFit(destPage);
								pdftron.PDF.Action newAction = pdftron.PDF.Action.CreateGoto(newDest);
								lnk.SetAction(newAction);
								Bookmark bookMark = Bookmark.Create(sink, uri);
								bookMark.SetAction(newAction);
								sink.AddRootBookmark(bookMark);
							}
							catch(Exception e)
                            {
								Console.WriteLine(e);
                            }
                        }
					}
                    sink.Save(OUTPUT_PATH, SDFDoc.SaveOptions.e_linearized);
                }
			}
			catch (Exception e)
			{
				Console.WriteLine(e);
			}
		}
	}
}