const { translate, detectLanguage, wordAlternatives, translateWithAlternatives } = require('deepl-translator');

// Translate text with explicit source and target languages
translate('Die Übersetzungsqualität von deepl ist erstaunlich!', 'EN', 'DE')
  .then(res => console.log(`Translation: ${res.translation}`))
  .catch(console.error);

// Translate short text with this method to get a few translation alternatives
translateWithAlternatives(
  'Die Übersetzungsqualität von deepl ist erstaunlich!',
  'EN'
)
  .then(res =>
    console.log(
      `Translation alternatives: ${res.translationAlternatives.join(', ')}`
    )
  )
  .catch(console.error);

// Leave out the source language or specify 'auto' to autodetect the input
translate('This is a representative chunk of text in english.', 'DE')
  .then(res => console.log(`Translation: ${res.translation}`))
  .catch(console.error);

// Detect the text language without giving back the translation
detectLanguage('Deepl también puede detectar un idioma. ¿Qué idioma es este?')
  .then(res => console.log(`Detected language: ${res.languageName}`))
  .catch(console.error);

// Multi-line translations work as well, even with different source languages mixed in
translate(
  `Das ist der erste Satz... Das der zweite.

  C'est la troisième phrase.


  Y ese es el cuarto.
  I piąta.`,
  'EN'
)
  .then(res => console.log(`Translation: ${res.translation}, Resolved languages: ${res.resolvedSourceLanguage}`))
  .catch(console.error);

  // This method allows for tweaking the translation. By providing a beginning, we define a word or a phrase
  // for which we want alternative translations within the context of a larger body of text (a sentence).
  // One of the returned alternatives can then be selected and passed into translateWithAlternatives
  // as an overriding word/phrase for the beginning of the whole translation.
  {
    const text = 'Die Übersetzungsqualität von deepl ist erstaunlich!';
    // Translates to: 'The translation quality of deepl is amazing!'
    wordAlternatives(text, 'EN', 'DE', 'The translation')
      .then(res => {
        console.log(`3 Alternative beginnings:`);
        res.alternatives.slice(0, 3).forEach(alt => console.log(alt));
        // Choose the third alternetive
        return res.alternatives[2];
      })
      .then(beginning => {
        // Request translation with selected alternative beginning
        return translateWithAlternatives(text, 'EN', 'DE', beginning);
      })
      .then(res => console.log(`Alternative: ${res.translation}`));
  }

{
  targetLanguage: 'XY', // Language code(s) of the language that was translate to
  resolvedSourceLanguage: 'YZ', // Language code(s) of the input language (resolved automatically for autodetect)
  translation: 'Translated text' // Translated text
}

{
  targetLanguage: 'XY', // Language code of the language that was translate to
  resolvedSourceLanguage: 'YZ', // Language code of the input language (resolved automatically for autodetect)
  translation: 'Translated text', // Translated text
  translationAlternatives: ['First translated alternative', 'Second translated alternative']
}

{
  languageCode: 'XY', // Language code of the input text
  languageName: 'Some language', // Language name (in English) of the input text
}

{
  targetLanguage: 'XY', // Language code of the language that was translate to
  resolvedSourceLanguage: 'YZ', // Language code of the input language
  alternatives: ['An alternative', 'Yet another alternative'], // Array of alternative sentence beginnings
}