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

var sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
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();