type Gcal = {

  token: string;

};

export async function main(

  gcal_auth: Gcal,

  calendarId: string,

  eventId: string,

  start_date?: string,

  end_date?: string,

  description?: string,

  summary: string,

  location?: string,

  attendees?: Array<object>,

) {

  const alwaysIncludeEmail = true;

  const sendUpdates = "all";

  const supportsAttachments = true;

  const UPDATE_EVENT_URL = `https://www.googleapis.com/calendar/v3/calendars/${calendarId}/events/${eventId}/?alwaysIncludeEmail=${alwaysIncludeEmail}&sendUpdates=${sendUpdates}&supportsAttachments=${supportsAttachments}`;

  const token = gcal_auth["token"];

  const body = {

    summary: summary,

    description: description,

    location: location,

    end: {

      date: end_date,

    },

    start: {

      date: start_date,

    },

    attendees: attendees,

  };

  const response = await fetch(UPDATE_EVENT_URL, {

    method: "PUT",

    body: JSON.stringify(body),

    headers: {

      Authorization: "Bearer " + token,

      "Content-Type": "application/json",

    },

  });

  const result = await response.json();

  return result;

}