// 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 do optimize in PDF documents under a folder.

// Include Foxit SDK header files.
#include <time.h>
#include <direct.h>
#include <stdio.h>
#include <stdlib.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_optimization_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/optimization/";

int pause_count_limit_ = 0;
int pause_count_ = 0;
FS_BOOL always_pause_ = TRUE;

FS_BOOL gNeedToPauseNow(void* user_data) {
  if (always_pause_) return TRUE;
  if (pause_count_ < pause_count_limit_) {
    pause_count_++;
    return TRUE;
  }
  if (pause_count_ < pause_count_limit_) {
    pause_count_++;
    return TRUE;
  } else {
     pause_count_ = 0;
     return FALSE; // This is to test a case: valid PauseCallback but needParseNow() will always return FALSE.
  }
}

int main(int argc, char *argv[]) {
  int err_ret = 0;
  FSErrorCode error_code = e_FSErrSuccess;
  wchar_t output_directory[MAX_FILE_PATH];
  wchar_t input_file[MAX_FILE_PATH];

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

  printf("Optimized Start : Image Compression.\n");
  swprintf_s(input_file, MAX_FILE_PATH, L"%ls[Optimize]ImageCompression.pdf", input_path);

  error_code = FSDK_Library_Initialize(sn, key);
  if (error_code != e_FSErrSuccess) {
    printf("Library Initialize Error: %d\n", error_code);
    return 1;
  }
  {
    FS_PDFDOC_HANDLE doc = NULL;
    FSPauseCallback* pause = NULL;
    FS_OPTIMIZERSETTINGS_HANDLE settings;
    FS_PROGRESSIVE_HANDLE progressive = NULL;
    FSState progress_state = e_FSToBeContinued;
    int percent = 0;

    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);
      FSDK_PDFDoc_Release(doc);
      return 1;
    }

    pause = (FSPauseCallback*)malloc(sizeof(FSPauseCallback));
    pause->user_data = pause;
    pause->NeedToPauseNow = gNeedToPauseNow;

    FSDK_OptimizerSettings_Create(&settings);
    error_code = FSDK_OptimizerSettings_SetOptimizerOptions(settings, e_FSOptimizerCompressImages);

    FSDK_Optimizer_Optimize(doc, settings, pause, &progressive);

    while (e_FSToBeContinued == progress_state) {
      char res_string[60];
      FSDK_Progressive_Continue(progressive, &progress_state);
      FSDK_Progressive_GetRateOfProgress(progressive, &percent);
      sprintf_s(res_string, 60, "Optimize progress percent: %d", percent);
      printf("%s\n", res_string);
    }
    if (e_FSFinished == progress_state) {
      wchar_t output_directory_optimized[60];
      FS_BOOL return_result = FALSE;
      swprintf_s(output_directory_optimized, 60, L"%lsImageCompression_Optimized.pdf", output_directory);
      
      error_code = FSDK_PDFDoc_SaveAs(doc, output_directory_optimized, e_FSSaveFlagRemoveRedundantObjects, &return_result);
      if (error_code != e_FSErrSuccess) {
        printf("Save doc error!\n");
        FSDK_OptimizerSettings_Release(settings);
        FSDK_PDFDoc_Release(doc);
        return 1;
      }
    }
    FSDK_OptimizerSettings_Release(settings);
  }
  printf("Optimized Finsih : Image Compression.\n");

  printf("Optimized Start : Clean up.\n");

  swprintf_s(input_file, MAX_FILE_PATH, L"%ls[Optimize]Cleanup.pdf", input_path);
  {
    FS_PDFDOC_HANDLE doc = NULL;
    FSPauseCallback* pause = NULL;
    FS_PROGRESSIVE_HANDLE progressive = NULL;
    FSState progress_state = e_FSToBeContinued;
    FS_OPTIMIZERSETTINGS_HANDLE settings;

    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) {
      FSDK_PDFDoc_Release(doc);
      return 1;
    }
    pause_count_limit_ = 0;
    pause_count_ = 0;
    always_pause_ = TRUE;
    pause = (FSPauseCallback*)malloc(sizeof(FSPauseCallback));
    pause->user_data = pause;
    pause->NeedToPauseNow = gNeedToPauseNow;

    FSDK_OptimizerSettings_Create(&settings);
    FSDK_OptimizerSettings_SetOptimizerOptions(settings, e_FSOptimizerCleanUp);
    FSDK_OptimizerSettings_SetCleanUpOptions(settings, e_FSCleanUpRemoveInvalidBookmarks | e_FSCleanUpRemoveInvalidLinks
      | e_FSCleanUpUseFlateForNonEncodedStream | e_FSCleanUpUseFlateInsteadOfLZW);

    FSDK_Optimizer_Optimize(doc, settings, pause, &progressive);

    while (e_FSToBeContinued == progress_state) {
      int percent;
      char res_string[60];
      FSDK_Progressive_Continue(progressive, &progress_state);
      FSDK_Progressive_GetRateOfProgress(progressive, &percent);
      sprintf_s(res_string, 60, "Optimize progress percent: %d", percent);
      printf("%s\n", res_string);
    }
    if (e_FSFinished == progress_state) {
      wchar_t output_directory_optimized[MAX_FILE_PATH];
      FS_BOOL return_result = FALSE;
      swprintf_s(output_directory_optimized, MAX_FILE_PATH, L"%lsCleanup_Optimized.pdf", output_directory);
      error_code = FSDK_PDFDoc_SaveAs(doc, output_directory_optimized, e_FSSaveFlagRemoveRedundantObjects, &return_result);
      if (error_code != e_FSErrSuccess) {
        printf("Save doc error!\n");
        FSDK_OptimizerSettings_Release(settings);
        FSDK_PDFDoc_Release(doc);
        return 1;
      }
    }
    FSDK_OptimizerSettings_Release(settings);
  }
  printf("Optimized Finsih : Clean up.\n");

  printf("Optimized Start : Discard Objects.\n");

  swprintf_s(input_file, MAX_FILE_PATH, L"%ls[Optimize]DiscardObjects.pdf", input_path);
  {
    FS_PDFDOC_HANDLE doc = NULL;
    FSPauseCallback* pause = NULL;
    FS_OPTIMIZERSETTINGS_HANDLE settings;
	FS_PROGRESSIVE_HANDLE progressive = NULL;
	FSState progress_state;

    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) {
      FSDK_PDFDoc_Release(doc);
      return 1;
    }
    pause_count_limit_ = 0;
    pause_count_ = 0;
    always_pause_ = TRUE;
    pause = (FSPauseCallback*)malloc(sizeof(FSPauseCallback));
    pause->user_data = pause;
    pause->NeedToPauseNow = gNeedToPauseNow;

    FSDK_OptimizerSettings_Create(&settings);
    FSDK_OptimizerSettings_SetOptimizerOptions(settings, e_FSOptimizerDiscardObjects);
    FSDK_OptimizerSettings_SetCleanUpOptions(settings, e_FSDiscardObjectsBookmarks | e_FSDiscardObjectsEmbeddedPageThumbnails
      | e_FSDiscardObjectsEmbeddedPrintSettings | e_FSDiscardObjectsFlattenFormFields
      | e_FSDiscardObjectsFormActions | e_FSDiscardObjectsJavaScriptActions);

    FSDK_Optimizer_Optimize(doc, settings, pause, &progressive);
    progress_state = e_FSToBeContinued;
    while (e_FSToBeContinued == progress_state) {
      int percent;
      char res_string[60];
      FSDK_Progressive_Continue(progressive, &progress_state);
      FSDK_Progressive_GetRateOfProgress(progressive, &percent);
      sprintf_s(res_string, 60, "Optimize progress percent: %d", percent);
      printf("%s\n", res_string);
    }
    if (e_FSFinished == progress_state) {
      wchar_t output_directory_optimized[MAX_FILE_PATH];
      FS_BOOL return_result = FALSE;
      swprintf_s(output_directory_optimized, MAX_FILE_PATH, L"%lsDiscardObjects_Optimized.pdf", output_directory);

      error_code = FSDK_PDFDoc_SaveAs(doc, output_directory_optimized, e_FSSaveFlagRemoveRedundantObjects, &return_result);
      if (error_code != e_FSErrSuccess) {
        printf("Save doc error!\n");
        FSDK_OptimizerSettings_Release(settings);
        FSDK_PDFDoc_Release(doc);
        return 1;
      }
    }
    FSDK_OptimizerSettings_Release(settings);
  }
  printf("Optimized Finsih : Discard Objects.\n");
  FSDK_Library_Release();
  return err_ret;
}