// 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 PDF 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 extract attached files from PDF files and
// add files as attachments to PDF files.

// Include Foxit SDK header files.
#include <time.h>
#include <stdarg.h>
#include <direct.h>
#include <stdio.h>

#include "../../../include/fs_basictypes_c.h"
#include "../../../include/fs_common_c.h"
#include "../../../include/fs_pdfdoc_c.h"
#include "../../../include/fs_pdfpage_c.h"
#include "../../../include/fs_filespec_c.h"
#include "../../../include/fs_pdfattachments_c.h"
#include "../../../include/fs_pdfnametree_c.h"

#ifndef TRUE
#define TRUE 1
#endif

#ifndef FALSE
#define FALSE 0
#endif

#ifndef NULL
#define NULL (void*)0
#endif

#define MAX_FILE_PATH 260

static const char* sn = "bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
static const char* key = "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";

static const wchar_t* output_path = L"../output_files/";
static const wchar_t* input_path = L"../input_files/";

void Write(FILE* file, const wchar_t* format, ...) {
  va_list vars;
  if (file) {
    // Get variable list
    va_start(vars, format);
    // Call vfprintf to format log data and output to log file
    vfwprintf(file, format, vars);
    // End variable list
    va_end(vars);
  }
}

int main(int argc, char *argv[]) {
  int err_ret = 0;
  wchar_t output_directory[MAX_FILE_PATH];
  wchar_t input_file[MAX_FILE_PATH] = { 0 };
  wchar_t file_info[MAX_FILE_PATH] = { 0 };
  FS_PDFDOC_HANDLE doc = NULL;

  FSErrorCode error_code = FSDK_Library_Initialize(sn, key);
  if (error_code != e_FSErrSuccess) {
    printf("Library Initialize Error: %d\n", error_code);
    return 1;
  }

  swprintf_s(output_directory, MAX_FILE_PATH, L"%lsattachment/", output_path);
  _wmkdir(output_directory);

  swprintf_s(input_file, MAX_FILE_PATH, L"%lsattachment.pdf", input_path);

  swprintf_s(file_info, MAX_FILE_PATH, L"%lsattachMent_info.txt", output_directory);

  error_code = FSDK_PDFDoc_Create0(input_file, &doc);
  if (error_code != e_FSErrSuccess) return 1;
  error_code = FSDK_PDFDoc_Load(doc, NULL);
  if (error_code != e_FSErrSuccess) {
    wprintf(L"The Doc [%ls] Error: %d\n", input_file, error_code);
    return 1;
  }

  {
    // Get information of attachments.
    FS_ATTACHMENTS_HANDLE attachments = NULL;
    FS_PDFNAMETREE_HANDLE pdfnametree = NULL;
    FILE* file = NULL;
    int count = 0;
    int i = 0;

    FSDK_PDFNameTree_Create0(&pdfnametree);
    FSDK_Attachments_Create(doc, pdfnametree, &attachments);

    _wfopen_s(&file, file_info, L"w+b");

    FSDK_Attachments_GetCount(attachments, &count);
    for (i = 0; i < count; i++) {
      FS_WSTR key;
      FS_BOOL return_value;
      FS_FILESPEC_HANDLE file_spec = NULL;

      FSDK_WStr_Init(&key);
      FSDK_Attachments_GetKey(attachments, i, &key);

      FSDK_Attachments_GetEmbeddedFile(attachments, (const wchar_t*)key.str, &file_spec);
      Write(file, L"key:\t\t%s\r\n", key.str);
      FSDK_WStr_Clear(&key);

      FSDK_FileSpec_IsEmpty(file_spec, &return_value);
      if (!return_value) {
        FS_WSTR name;
        FS_INT64 size;
        FS_BOOL is_embedded;
        FSDateTime creation_date_time;
        FSDateTime modified_date_time;
        wchar_t return_string[MAX_FILE_PATH];

        FSDK_WStr_Init(&name);
        FSDK_FileSpec_GetFileName(file_spec, &name);
        Write(file, L"Name:\t\t%s\r\n", name.str);
        FSDK_FileSpec_GetFileSize(file_spec, &size);
        Write(file, L"Size:\t\t%d\r\n", size);
        FSDK_FileSpec_IsEmbedded(file_spec, &is_embedded);
        FSDK_FileSpec_GetCreationDateTime(file_spec, &creation_date_time);
        FSDK_FileSpec_GetModifiedDateTime(file_spec, &modified_date_time);
        Write(file, L"Is embedded:\t%ls\r\n", is_embedded ? L"true" : L"false");

        swprintf_s(return_string, MAX_FILE_PATH, L"%d/%d/%d-%d:%d:%d %ls%d:%d", creation_date_time.year, creation_date_time.month, creation_date_time.day, creation_date_time.hour,
        creation_date_time.minute, creation_date_time.second, creation_date_time.utc_hour_offset > 0 ? L"+" : L"-", creation_date_time.utc_hour_offset,
        creation_date_time.utc_minute_offset);

        Write(file, L"Creation time:\t%ls\r\n", return_string);
        swprintf_s(return_string, MAX_FILE_PATH, L"%d/%d/%d-%d:%d:%d %ls%d:%d", modified_date_time.year, modified_date_time.month, modified_date_time.day, modified_date_time.hour,
        modified_date_time.minute, modified_date_time.second, modified_date_time.utc_hour_offset > 0 ? L"+" : L"-", modified_date_time.utc_hour_offset,
        modified_date_time.utc_minute_offset);

        Write(file, L"Modified time:\t%ls\r\n", return_string);
        Write(file, L"\r\n");
        if (is_embedded) {
          wchar_t ex_file_path[MAX_FILE_PATH];
          FS_BOOL is_export_status;

          swprintf_s(ex_file_path, MAX_FILE_PATH, L"%ls%ls", output_directory, name.str );
          FSDK_FileSpec_ExportToFile(file_spec, ex_file_path, &is_export_status);
          wprintf(L"%ls ExportToFile %ls\n", name.str, (is_export_status ? L"successful" : L"failed"));
        }
        FSDK_WStr_Clear(&name);
      }
    }
    fclose(file);
    FSDK_Attachments_Release(attachments);
    FSDK_PDFNameTree_Release(pdfnametree);
  }
  {
    // Remove all attachments
    FS_ATTACHMENTS_HANDLE attachment = NULL;
    FS_PDFNAMETREE_HANDLE pdfnametrees = NULL;
    FS_BOOL result;
    wchar_t new_pdf[MAX_FILE_PATH] = { 0 };
    FS_BOOL return_result = FALSE;

    FSDK_PDFNameTree_Create0(&pdfnametrees);
    FSDK_Attachments_Create(doc, pdfnametrees, &attachment);

    FSDK_Attachments_RemoveAllEmbeddedFiles(attachment, &result);

    swprintf_s(new_pdf, MAX_FILE_PATH, L"%lsattachment_remove.pdf", output_directory);

    error_code = FSDK_PDFDoc_SaveAs(doc, new_pdf, e_FSSaveFlagNoOriginal, &return_result);
    if (error_code != e_FSErrSuccess) {
      printf("Save doc error!\n");
      FSDK_PDFDoc_Release(doc);
      return 1;
    }
    printf("Remove all attachments.\n");
    FSDK_Attachments_Release(attachment);
    FSDK_PDFNameTree_Release(pdfnametrees);
  }
  {
    wchar_t text_path[MAX_FILE_PATH] = { 0 };
    FS_ATTACHMENTS_HANDLE attachment = NULL;
    FS_PDFNAMETREE_HANDLE pdfnametrees = NULL;
    FS_BOOL result = FALSE;
    wchar_t new_pdf[MAX_FILE_PATH] = { 0 };
    FS_BOOL return_result = FALSE;

    swprintf_s(text_path, MAX_FILE_PATH, L"%lsAboutFoxit.pdf", output_directory);

    FSDK_PDFNameTree_Create0(&pdfnametrees);
    FSDK_Attachments_Create(doc, pdfnametrees, &attachment);
    // Add a new attachment to PDF document.
    FSDK_Attachments_AddFromFilePath(attachment, L"OriginalAttachmentsInfo", text_path, &result);

    swprintf_s(new_pdf, MAX_FILE_PATH, L"%lsattachment_add.pdf", output_directory);

    error_code = FSDK_PDFDoc_SaveAs(doc, new_pdf, e_FSSaveFlagNoOriginal, &return_result);
    if (error_code != e_FSErrSuccess) {
      printf("Save doc error!\n");
      FSDK_PDFDoc_Release(doc);
      return 1;
    }
    printf("Add a new attachment to PDF document.\n");
    FSDK_Attachments_Release(attachment);
    FSDK_PDFNameTree_Release(pdfnametrees);
  }

  FSDK_PDFDoc_Release(doc);
  FSDK_Library_Release();
  return err_ret;
}
