// Before running the sample:
// - Enable the API at:
//   https://console.developers.google.com/apis/api/drive.googleapis.com
// - Login into gcloud by running:
//   `$ gcloud auth application-default login`
// - Install the npm module by running:
//   `$ npm install googleapis`

const {google} = require('googleapis');
const drive = google.drive('v2');

async function main() {
  const auth = new google.auth.GoogleAuth({
    // Scopes can be specified either as an array or as a single, space-delimited string.
    scopes: [
      'https://www.googleapis.com/auth/drive',
      'https://www.googleapis.com/auth/drive.file',
    ],
  });

  // Acquire an auth client, and bind it to all future calls
  const authClient = await auth.getClient();
  google.options({auth: authClient});

  // Do the magic
  const res = await drive.parents.delete({
    // Deprecated. If an item is not in a shared drive and its last parent is deleted but the item itself is not, the item will be placed under its owner's root.
    enforceSingleParent: 'placeholder-value',
    // The ID of the file.
    fileId: 'placeholder-value',
    // The ID of the parent.
    parentId: 'placeholder-value',
  });
  console.log(res.data);
}

main().catch(e => {
  console.error(e);
  throw e;
});