//
// 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;
using pdftron.FDF;

namespace FDFTestCS
{
	/// <summary>
	/// PDFNet includes full support for FDF (Forms Data Format) and for merging/extracting
	/// forms data (FDF) with/from PDF. This sample illustrates basic FDF merge/extract functionality 
	/// available in PDFNet.
	/// </summary>
	class Class1
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		static void Main(string[] args)
		{
			PDFNet.Initialize();

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

			// Example 1)
			// Iterate over all form fields in the document. Display all field names.
			try  
			{
				PDFDoc doc = new PDFDoc(input_path + "form1.pdf");
				doc.InitSecurityHandler();
				
				FieldIterator itr;
				for(itr=doc.GetFieldIterator(); itr.HasNext(); itr.Next())
				{
					Console.WriteLine("Field name: {0:s}", itr.Current().GetName());
					Console.WriteLine("Field partial name: {0:s}", itr.Current().GetPartialName());

					Console.Write("Field type: ");
					Field.Type type = itr.Current().GetType();
					switch(type)
					{
						case Field.Type.e_button: 
							Console.WriteLine("Button"); break;
						case Field.Type.e_text: 
							Console.WriteLine("Text"); break;
						case Field.Type.e_choice: 
							Console.WriteLine("Choice"); break;
						case Field.Type.e_signature: 
							Console.WriteLine("Signature"); break;
					}

					Console.WriteLine("------------------------------");
				}

				doc.Close();
				Console.WriteLine("Done.");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			// Example 2) Merge data from FDF
			try  
			{
				Console.WriteLine("Merge data from fdf file...");

				PDFDoc doc = new PDFDoc(input_path + "form1.pdf");
				doc.InitSecurityHandler();

				FDFDoc fdf_doc = new FDFDoc(input_path + "form1_data.fdf");
				doc.FDFMerge(fdf_doc);

				// To use PDFNet form field appearance generation instead of relying on 
				// Acrobat, uncomment the following two lines:
				// doc.RefreshFieldAppearances();
				// doc.GetAcroForm().Put("NeedAppearances", Obj.CreateBool(false));
				doc.Save(output_path + "form1_filled.pdf", SDFDoc.SaveOptions.e_linearized);
				doc.Close();

				Console.WriteLine("Done. Result saved in form1_filled.pdf");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			// Example 3) Extract data to FDF
			try  
			{
				Console.WriteLine("Extract data to fdf file...");

				PDFDoc in_doc = new PDFDoc(output_path + "form1_filled.pdf");
				in_doc.InitSecurityHandler();

				FDFDoc doc = in_doc.FDFExtract();
				doc.SetPdfFileName("../form1.pdf");
				doc.Save(output_path + "form1_filled_data.fdf");
				
				in_doc.Close();
				Console.WriteLine("Done. Result saved in form1_filled_data.fdf");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			// Example 4) Read FDF files directly
			try  
			{
				FDFDoc doc = new FDFDoc(output_path + "form1_filled_data.fdf");
				FDFFieldIterator itr = doc.GetFieldIterator();
				for(; itr.HasNext(); itr.Next()) 
				{
					Console.WriteLine("Field name: {0:s}", itr.Current().GetName());
					Console.WriteLine("Field partial name: {0:s}", itr.Current().GetPartialName());
					Console.WriteLine("------------------------------");
				}

				Console.WriteLine("Done.");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			// Example 5) Direct generation of FDF.
			try  
			{
				FDFDoc doc = new FDFDoc();

				// Create new fields (i.e. key/value pairs).
				doc.FieldCreate("Company", (int)Field.Type.e_text, "PDFTron Systems");
				doc.FieldCreate("First Name", (int)Field.Type.e_text, "John");
				doc.FieldCreate("Last Name", (int)Field.Type.e_text, "Doe");
				// ...		

				// doc.SetPdfFileName("mydoc.pdf");
				doc.Save(output_path + "fdf_sample_output.fdf");
				Console.WriteLine("Done. Results saved in fdf_sample_output.fdf");
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			PDFNet.Terminate();
		}
	}
}