// Copyright (C) 2003-2026, Foxit Software Inc..
// All Rights Reserved.
//
// http://www.foxitsoftware.com
//
// The following code is copyrighted and contains proprietary information and trade secrets of Foxit Software Inc..
// You cannot distribute any part of Foxit SDK to any third party or general public,
// unless there is a separate license agreement with Foxit Software Inc. which explicitly grants you such rights.
//
// This file contains an example to demonstrate how to use Foxit PDF SDK to import annotations from FDF/XFDF files
// and export annotations to FDF/XFDF files.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using foxit;
using foxit.common;
using foxit.common.fxcrt;
using foxit.pdf;
using System.IO;
using System.Runtime.InteropServices;

namespace fdfCS
{
    class fdf
    {
        static void Main(string[] args)
        {
            string input_path = "../input_files/";
            string output_path = "../output_files/fdf/";
            System.IO.Directory.CreateDirectory(output_path);

            string sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
            string key = "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";
            // Initialize library.
            ErrorCode error_code = Library.Initialize(sn, key);
            if (error_code != ErrorCode.e_ErrSuccess)
            {
                Console.WriteLine("Library Initialize Error: {0}\n", error_code);
                return;
            }

            try
            {
                {
                    // Import FDF file
                    string input_file = input_path + "AboutFoxit.pdf";
                    string fdf_file = input_path + "AnnotationData.fdf";
                    using (PDFDoc pdf_doc = new PDFDoc(input_file))
                    {
                        error_code = pdf_doc.Load(null);
                        if (error_code != ErrorCode.e_ErrSuccess)
                        {
                            Console.WriteLine("The Doc [{0}] Error: {1}\n", input_file, error_code);
                            Library.Release();
                            return;
                        }
                        using (foxit.fdf.FDFDoc fdf_doc = new foxit.fdf.FDFDoc(fdf_file))
                        {
                            pdf_doc.ImportFromFDF(fdf_doc, (int)foxit.pdf.PDFDoc.DataType.e_Annots, new Range());
                            Console.WriteLine("Import annotations from fdf with file.\n");
                            string output_file = output_path + "AboutFoxit_importFDF.pdf";
                            pdf_doc.SaveAs(output_file, (int)PDFDoc.SaveFlags.e_SaveFlagNoOriginal);
                        }
                    }

                    byte[] buffer = File.ReadAllBytes(fdf_file);
                    IntPtr buffer_intptr = Marshal.AllocHGlobal(buffer.Length);
                    Marshal.Copy(buffer, 0, buffer_intptr, buffer.Length);

                    using (PDFDoc pdf_doc = new PDFDoc(input_file))
                    {
                        error_code = pdf_doc.Load(null);
                        if (error_code != ErrorCode.e_ErrSuccess)
                        {
                            Console.WriteLine("The Doc [{0}] Error: {1}\n", input_file, error_code);
                            Library.Release();
                            return;
                        }
                        using (foxit.fdf.FDFDoc fdf_doc = new foxit.fdf.FDFDoc(buffer_intptr, (uint)buffer.Length))
                        {
                            pdf_doc.ImportFromFDF(fdf_doc, (int)foxit.pdf.PDFDoc.DataType.e_Annots, new Range());
                            Console.WriteLine("Import annotations from fdf with memory buffer.\n");
                            string output_file = output_path + "AboutFoxit_importFDF_From_Memory.pdf";
                            pdf_doc.SaveAs(output_file, (int)PDFDoc.SaveFlags.e_SaveFlagNoOriginal);
                        }
                    }
                    Marshal.FreeHGlobal(buffer_intptr);

                    {
                        // Export FDF file
                        input_file = input_path + "AnnotationDataExport.pdf";
                        string output_fdf = output_path + "AnnotationDataExport_fdf.fdf";
      
                        using(foxit.pdf.PDFDoc pdf_doc = new foxit.pdf.PDFDoc(input_file))
                        {
                            error_code = pdf_doc.Load(null); 
                            if (error_code != ErrorCode.e_ErrSuccess)
                            {
                                Console.WriteLine("The Doc [{0}] Error: {1}\n", input_file, error_code);
                                Library.Release();
                                return;
                            }

                            using (foxit.fdf.FDFDoc fdf_doc = new foxit.fdf.FDFDoc(foxit.fdf.FDFDoc.Type.e_FDF))
                            {
                                pdf_doc.ExportToFDF(fdf_doc, (int)foxit.pdf.PDFDoc.DataType.e_Annots, new Range());
                                fdf_doc.SaveAs(output_fdf);
                                Console.WriteLine("Export a fdf file.\n");
                            }
                        }
                    }
                    
                    {
                        // Export XFDF file
                        input_file = input_path + "AnnotationDataExport.pdf";
                        string output_xfdf = output_path + "AnnotationDataExport_xfdf.xfdf";

                        using (foxit.pdf.PDFDoc pdf_doc = new foxit.pdf.PDFDoc(input_file))
                        {
                            error_code = pdf_doc.Load(null); 
                            if (error_code != ErrorCode.e_ErrSuccess) 
                            {
                                Console.WriteLine("The Doc [{0}] Error: {1}\n", input_file, error_code);
                                Library.Release();
                                return;
                            }

                            using (foxit.fdf.FDFDoc fdf_doc = new foxit.fdf.FDFDoc(foxit.fdf.FDFDoc.Type.e_XFDF))
                            {
                                pdf_doc.ExportToFDF(fdf_doc, (int)foxit.pdf.PDFDoc.DataType.e_Annots, new Range());
                                fdf_doc.SaveAs(output_xfdf);
                                Console.WriteLine("Export an xfdf file.\n");
                            }
                        }
                    }
                }
            }
            catch (foxit.PDFException e)
            {
                Console.WriteLine(e.Message);
            }

            Library.Release();
        }
    }
}
