const gt = new GT({ projectId: 'your-project-id', apiKey: 'your-api-key' });

const result = await gt.downloadFileBatch([
  { fileId: 'file-123', branchId: 'branch-456', locale: 'es' },
  { fileId: 'file-123', branchId: 'branch-456', locale: 'fr' },
  { fileId: 'file-123', branchId: 'branch-456', locale: 'de' }
]);

type DownloadFileBatchRequest = {
  fileId: string;
  branchId?: string;
  locale?: string;
  versionId?: string;
}[];

type DownloadFileBatchResult = {
  files: File[];
  count: number;
}

type File = {
  fileId: string;
  branchId?: string;
  locale?: string;
  versionId?: string;
  fileName: string;
  data: string;
}

// (1) Create a GT instance
const targetLocales = ['es', 'fr', 'de'];
const gt = new GT({
  projectId: 'your-project-id',
  apiKey: 'your-api-key',
});

// (2) Upload the file
const fileUpload = {
  content: fileContents,
  fileName: filePath,
  fileFormat: 'JSON',
  locale: 'en',
};
const files = [ { source: fileUpload } ];
const { uploadedFiles } = await gt.uploadSourceFiles(
  files,
  { sourceLocale: 'en' }
);

// (3) Enqueue the file translation job
const enqueueResult = await gt.enqueueFiles(
  uploadedFiles,
  {
    sourceLocale: 'en',
    targetLocales: targetLocales,
  }
);

// (4) Wait for all translations to be completed
const { fileId, versionId, branchId } = uploadedFiles[0];
const translatedFileQueries = targetLocales.map((locale) => ({
  fileId,
  versionId,
  branchId,
  locale
}));

while (true) {
  const result = await gt.queryFileData({
    translatedFiles: translatedFileQueries
  });

  const allCompleted = result.translatedFiles?.every(
    (file) => file.status === 'completed'
  );

  if (allCompleted) {
    break;
  }

  await new Promise(resolve => setTimeout(resolve, 1000));
}

// (5) Download all translations in a batch
const downloadResult = await gt.downloadFileBatch(
  targetLocales.map((locale) => ({
    fileId,
    branchId,
    locale
  }))
);

downloadResult.files.forEach(file => {
  console.log(`Downloaded ${file.locale}: ${file.fileName}`);
});