export const pacSelectFirst = input => {
  // store the original event binding function
  var _addEventListener = input.addEventListener
    ? input.addEventListener
    : input.attachEvent

  function addEventListenerWrapper (type, listener) {
    // Simulate a 'down arrow' keypress on hitting 'return' when no pac suggestion is selected,
    // and then trigger the original listener.
    if (type == 'keydown') {
      var orig_listener = listener
      listener = function (event) {
        var suggestion_selected = $('.pac-item-selected').length > 0
        if (event.which == 13 && !suggestion_selected) {
          var simulated_downarrow = $.Event('keydown', {
            keyCode: 40,
            which: 40
          })
          orig_listener.apply(input, [simulated_downarrow])
        }

        orig_listener.apply(input, [event])
      }
    }

    _addEventListener.apply(input, [type, listener])
  }

  input.addEventListener = addEventListenerWrapper
  input.attachEvent = addEventListenerWrapper
}