class Content {
  static get JSON() {
    return 'application/json';
  }
}

class API {
  static get REJECT_URL() {
    return `/api/envelope/reject`;
  }

  static get REJECT_REDIR_URL() {
    return `/envelopekey/${API.ENV_KEY}/rejected`;
  }

  static get SHARE_URL() {
    return `/api/readonly`
  }

  static __XSRF_TOKEN
  static get XSRF_TOKEN() {
    API.__XSRF_TOKEN ??= document.getElementsByName('__RequestVerificationToken')[0].value;
    return API.__XSRF_TOKEN;
  }

  static get ENV_KEY() {
    return ENV_KEY ?? document.querySelector('meta[name="env-key"]').getAttribute('content');
  }
}

const submitForm = async form => await fetch(form.action, {
  method: form.method,
  body: new FormData(form),
  headers: {
    "X-Requested-With": "XMLHttpRequest"
  }
})

const createRequest = async (method, url, body, contentType) => {
  return fetch(url, {
    credentials: 'include',
    method: method,
    headers: {
      'Content-Type': contentType,
      'X-XSRF-TOKEN': API.XSRF_TOKEN
    },
    body: JSON.stringify(body)
  })
}

const createPost = (url, body, contentType) => createRequest('POST', url, body, contentType);

const rejectEnvelope = (reason) => createPost(API.REJECT_URL, reason, Content.JSON);

const redirect = (url) => window.location.href = url;

const redirRejected = () => redirect(API.REJECT_REDIR_URL);

const shareEnvelope = (receiverMail, dateValid) => createPost(API.SHARE_URL, { receiverMail: receiverMail, dateValid: dateValid }, Content.JSON);