const fs = require('fs');
const path = require('path');

/**
 * Builds a configuration file for rules locales based on the input directory.
 * This script generates a configuration file containing a list of locales,
 * based on the existing files with the specified extension in the input directory.
 * This enhances the game's accessibility to different languages.
 *
 * @param {string} inputDirectory - The directory to read the files from.
 * @param {string} outputDirectory - The directory to write the configuration file to.
 * @param {string} extname - The extension of the files to be included.
 * @param {string} outputFileName - The name of output file.
 * @returns {void}
 */
function buildLocalesConfig(inputDirectory, outputDirectory, extname, outputFileName) {
  // Get all files from the input directory
  const files = fs.readdirSync(inputDirectory);

  // Filter only files with the provided extension
  const filteredFiles = files.filter(file => path.extname(file) === extname);

  // Remove extensions from filenames
  const fileNamesWithoutExtensions = filteredFiles.map(file => path.parse(file).name);

  // Write the array of filenames to the new file in the output directory
  fs.writeFileSync(
    path.join(outputDirectory, outputFileName),
    JSON.stringify(fileNamesWithoutExtensions, null, 2)  // 2 spaces for indentation in the output json
  );
}

const inputDirectory = process.argv[2];
const outputDirectory = process.argv[3];
const extname = process.argv[4];
const outputFileName = process.argv[5];

buildLocalesConfig(inputDirectory, outputDirectory, extname, outputFileName);