/*
package.json
{
  "name": "sample-cloud-storage",
  "version": "0.0.1",
 "dependencies": {
    "@google-cloud/storage": "1.2.1"
  }
}


/**
 * Triggered from a message on a Cloud Storage bucket.
 *
 * @param {!Object} event The Cloud Functions event.
 * @param {!Function} The callback function.
 */
const Storage = require('@google-cloud/storage');

exports.backupTerraformState = function(event, callback) {
  const storage = Storage();
  const file = event.data;
  console.log(file.name);

  var d = new Date();
  var patt = /^[a-zA-Z_-]*terraform\.tfstat$/;

  if (file.name.str.match(patt)) {
    storage
    .bucket(file.bucket)
    .file(file.name)
    .copy(storage.bucket("my-terraform-bucket").file("backup/" + file.name+ "-" + Math.round(Date.now() / 1000) ))
    .then(() => {
      console.log("copied");
    })
    .catch((err) => {
      console.error('ERROR:', err);
    });
  } else {
    console.log("not match:[" + file.name + "]");

  }

  callback();
};