// Add missing keys to non-english languages from `en.json`.
// This script eases the process of translating strapi to other languages.
// Usage:
//   node scripts/front/add-missing-keys-to-other-language.js [language]
// Example:
//   node scripts/front/add-missing-keys-to-other-language.js vi

'use strict';

const { join, dirname } = require('path');
const { promisify } = require('util');
const fs = require('fs-extra');
const glob = promisify(require('glob').glob);
const chalk = require('chalk');

const updateMissingKeysToJSON = async (filePath) => {
  // Read translation file
  const currentTranslationFileJSON = await fs.readJSON(filePath);
  // Read en.json
  const mainTranslationFile = join(dirname(filePath), 'en.json');
  const mainTranslationFileJSON = await fs.readJSON(mainTranslationFile);
  // Add missing keys from en.json to translation file
  const updatedFileJSON = Object.keys(mainTranslationFileJSON).reduce((acc, current) => {
    if (currentTranslationFileJSON[current]) {
      acc[current] = currentTranslationFileJSON[current];
    } else {
      acc[current] = mainTranslationFileJSON[current];
    }

    return acc;
  }, {});
  return updatedFileJSON;
};

const addMissingKeyForSingleFile = async (filePath) => {
  console.log('Start adding missing keys to', filePath);
  try {
    const updatedFileJSON = await updateMissingKeysToJSON(filePath);
    await fs.writeJson(filePath, updatedFileJSON, { spaces: 2 });
    console.log('Added missing keys to', filePath);
    return Promise.resolve();
  } catch (err) {
    return Promise.reject(err);
  }
};

const addMissingKeys = async (lang) => {
  // Get translation files
  const corePackageDirs = await glob('packages/core/*');
  const pluginsPackageDirs = await glob('packages/plugins/*');
  const packageDirs = [...corePackageDirs, ...pluginsPackageDirs];
  const pathToTranslationsFolder = ['admin', 'src', 'translations'];

  const translationFiles = packageDirs
    .filter((dir) => {
      return fs.existsSync(join(dir, ...pathToTranslationsFolder, `${lang}.json`));
    })
    .map((dir) => {
      return join(dir, ...pathToTranslationsFolder, `${lang}.json`);
    });
  console.log('List of files to add missing keys', translationFiles, '\n');

  // For each file run addMissingKeyForSingleFile
  translationFiles.forEach(addMissingKeyForSingleFile);
};

if (require.main === module) {
  if (process.argv.length < 3) {
    console.warn(
      chalk.yellow(
        'Please provide a language. For example:\nnode scripts/front/add-missing-keys-to-other-language.js vi'
      )
    );
    process.exit(1);
  }

  addMissingKeys(process.argv[2]).catch((err) => console.error(err));
}

module.exports = {
  updateMissingKeysToJSON,
};