//
// Copyright (c) 2001-2012 by PDFTron Systems Inc. All Rights Reserved.
//

using System;
using pdftron;
using pdftron.Common;
using pdftron.Filters;
using pdftron.SDF;
using pdftron.PDF;

namespace SDFTestCS
{
	/// <summary>
	/// This sample illustrates how to use basic SDF API (also known as Cos) to edit an 
	/// existing document.
	/// </summary>
	class SDFTest
	{
		static void Main(string[] args)
		{
			PDFNet.Initialize();

			// Relative path to the folder containing test files.
			string input_path =  "../../../../TestFiles/";
			string output_path = "../../../../TestFiles/Output/";


			//------------------------------------------------------------------
			Console.WriteLine("-------------------------------------------------");
			Console.WriteLine("Opening the test file...");

			try
			{
				// Here we create a SDF/Cos document directly from PDF file. In case you have 
				// PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
				SDFDoc doc = new SDFDoc(input_path + "fish.pdf");
				doc.InitSecurityHandler();				

				Console.WriteLine("-------------------------------------------------");
				Console.WriteLine("Modifying info dictionary, adding custom properties, embedding a stream...");

				Obj trailer = doc.GetTrailer();	// Get the trailer

				// Now we will change PDF document information properties using SDF API

				// Get the Info dictionary. 
				DictIterator itr = trailer.Find("Info");	
				Obj info;
				if (itr.HasNext()) 
				{
					info = itr.Value();
					// Modify 'Producer' entry.
					info.PutString("Producer", "PDFTron PDFNet");

					// Read title entry (if it is present)
					itr = info.Find("Author"); 
					if (itr.HasNext()) 
					{
						info.PutString("Author", itr.Value().GetAsPDFText() + "- Modified");
					}
					else 
					{
						info.PutString("Author", "Joe Doe");
					}
				}
				else 
				{
					// Info dict is missing. 
					info = trailer.PutDict("Info");
					info.PutString("Producer", "PDFTron PDFNet");
					info.PutString("Title", "My document");
				}

				// Create a custom inline dictionary within Info dictionary
				Obj custom_dict = info.PutDict("My Direct Dict");

				// Add some key/value pairs
				custom_dict.PutNumber("My Number", 100);

				Obj my_array = custom_dict.PutArray("My Array");

				// Create a custom indirect array within Info dictionary
				Obj custom_array = doc.CreateIndirectArray();	
				info.Put("My Indirect Array", custom_array);
				
				// Create indirect link to root
				custom_array.PushBack(trailer.Get("Root").Value());

				// Embed a custom stream (file my_stream.txt).
				StdFile embed_file = new StdFile(input_path + "my_stream.txt", StdFile.OpenMode.e_read_mode);
				FilterReader mystm = new FilterReader(embed_file);
				custom_array.PushBack(doc.CreateIndirectStream(mystm));

				// Save the changes.
				Console.WriteLine("Saving modified test file...");
				doc.Save(output_path + "sdftest_out.pdf", 0, "%PDF-1.4");

				doc.Close();

				Console.WriteLine("Test completed.");
				Console.WriteLine("Done. Result saved in sdftest_out.pdf");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			PDFNet.Terminate();
		}
	}
}