const gcloud_translator = require('@google-cloud/translate')({ key: GCLOUD_API_KEY, promise: Promise });

module.exports.translate = (msg, from, to) => {
	// https://googlecloudplatform.github.io/google-cloud-node/#/docs/translate/1.0.0/translate?method=translate
	return gcloud_translator
		.translate(msg, { from, to })
		.then(data => {
			const translation = data[0];
			// const api_response = data[1];

			return Array.isArray(msg) ? arrify(translation) : translation;
		});
};

gcloud_translator.translate('Hello world', { from: 'en', to: 'vn' }).then(data => {
  const translation = data[0];

  // translation is a string
})

gcloud_translator.translate(['Hello world'], { from: 'en', to: 'vn' }).then(data => {
  const translation = data[0];

  // translation is also a string, which is unexpected
})

gcloud_translator.translate(['Hello world', 'How are you doing?'], { from: 'en', to: 'vn' }).then(data => {
  const translation = data[0];

  // translation is an array, which is expected
})