// 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 full text search in PDF documents under a folder.

const FSDK = require("@foxitsoftware/foxit-pdf-sdk-node");
const fs = require('fs');
const os = require('os');
const path = require('path');
const util = require('util');

var sn = "bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
var key = "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";

const input_path = "../input_files/fulltextsearch/";
const output_path = "../output_files/";

class TextDoc {
  constructor(file_name, file_mode) {
    this.file_name = file_name;
    this.file_mode = file_mode;
    this.file_stream = fs.openSync(file_name, file_mode);
    if (!this.file_stream) {
      throw new Error('Cannot open file');
    }
  }
  Write(format, ...args) {
    if(!this.file_stream) 
      throw new Error("File not opened");
    let formatted_string = util.format(format, ...args);
    let buffer = new Buffer.from(formatted_string, 'utf-8');
    fs.writeSync(this.file_stream, buffer, 0, buffer.length);
  }
  WriteWithPrefix(count, prefix, format, ...args){
    for (let i = 0; i < count; i++) {
      this.Write(prefix);
    }
    this.Write(format, ...args);
  }
  Close() {
    fs.closeSync(this.file_stream);
    this.file_stream = null;
  }
}

class SearchCallbackImp {
  constructor(output_txt_file_path) {
    this.text_doc_ = new TextDoc(output_txt_file_path, "w");
  }

  Release() { }
  RetrieveSearchResult(filePath, pageIndex, matchResult, matchStartTextIndex, matchEndTextIndex, sentence, sentenceStartTextIndex, sentenceEndTextIndex) {
    this.text_doc_.Write("RetrieveSearchResult:\n");
    this.text_doc_.Write(`Found file is: ${filePath}\n`);
    this.text_doc_.Write(`Page index is: ${pageIndex}\n`);
    this.text_doc_.Write(`Start text index: ${matchStartTextIndex}\n`);
    this.text_doc_.Write(`End text index: ${matchEndTextIndex}\n`);
    this.text_doc_.Write(`Match is: ${matchResult}\n`);
    this.text_doc_.Write(`Sentence start index: ${sentenceStartTextIndex}\n`);
    this.text_doc_.Write(`Sentence end index: ${sentenceEndTextIndex}\n`);
    this.text_doc_.Write(`Sentence is: ${sentence}\n`);
    this.text_doc_.Write("\r\n");
    return 0;
  }
}

class Search_Pause {
  constructor(pause_count_limit) {
    this.pause_count_limit_ = pause_count_limit;
    this.pause_count_ = 0;
    this.always_pause_ = false;
  }
  NeedToPauseNow() {
    if (this.always_pause_) return true;
    if (this.pause_count_ < this.pause_count_limit_) {
      this.pause_count_++;
      return true;
    } else {
      this.pause_count_ = 0;
      return false;
    }
  }
  ClearCount() {
    this.pause_count_ = 0;
  }
}


let error_code = FSDK.Library.Initialize(sn, key);
if (FSDK.e_ErrSuccess != error_code) {
  if (FSDK.e_ErrInvalidLicense == error_code)
    console.log("[Failed] Current used Foxit PDF SDK key information is invalid.");
  else
    console.log("Library Initialize Error: %d", FSDK.e_ErrSuccess);
  return;
}

let output_directory = output_path + "fulltextsearch/";
if (!fs.existsSync(output_directory)) {
  fs.mkdirSync(output_directory);
}

try
{
  let full_text_search = new FSDK.FullTextSearch();
  //The path of data base to store the indexed data...
  let dbPath = output_directory + "search.db";
  full_text_search.SetDataBasePath(dbPath);
  // Get document source information.
  let docs_source = new FSDK.DocumentsSource(input_path);
  // Create a Pause callback object implemented by users to pause the updating process.
  let search_pause = new Search_Pause(5);
  let pause = new FSDK.PauseCallback(search_pause);
  let search_progress = full_text_search.StartUpdateIndex(docs_source, pause, false);
  let state = FSDK.Progressive.e_ToBeContinued;
  while(state == FSDK.Progressive.e_ToBeContinued) {
    state = search_progress.Continue();
  }
  // Create a callback object which will be invoked when a matched one is found.
  let callback = new SearchCallbackImp(output_directory + "result.txt");
  let search_callback = new FSDK.SearchCallback(callback)
  // Search the specified keyword from the indexed data source.
  full_text_search.SearchOf("Foxit", FSDK.FullTextSearch.e_RankHitCountASC, search_callback);
  console.log("FullTextSearch demo.");
} catch(e) {
  console.log(e)
}
FSDK.Library.Release();