const url = {
  get reject() {
    return `/api/annotation/reject`;
  },

  get rejectRedir() {
    return `/envelope/${url.envKey}`;
  },

  get share() {
    return `/api/readonly`;
  },

  get xsrfToken() {
    if (!this.__xsrfToken) {
      this.__xsrfToken = document.getElementsByName('__RequestVerificationToken')[0].value;
    }
    return this.__xsrfToken;
  },

  get envKey() {
    if (!this.__envKey) {
      this.__envKey = 
        typeof envKey !== "undefined"
          ? envKey
          : document.querySelector('meta[name="env-key"]').getAttribute('content');
    }
    return this.__envKey;
  }
};

function submitForm(form) {
  fetch(form.action, {
    method: form.method,
    body: new FormData(form),
    headers: {
      "X-Requested-With": "XMLHttpRequest"
    }
  })
}

function createRequest(method, url, body, contentType = 'application/json') {
  return fetch(url, {
    credentials: 'include',
    method: method,
    headers: {
      'Content-Type': contentType,
      'X-XSRF-TOKEN': url.xsrfToken
    },
    body: JSON.stringify(body)
  })
}

function createPost(url, body, contentType = 'application/json') {
  return createRequest('POST', url, body, contentType);
}

function rejectEnvelope(reason) {
  return createPost(url.reject, reason, Content.JSON);
}

function redirect(url) {
  return window.location.href = url;
}

function redirRejected() {
  return redirect(url.rejectRedir);
}

function shareEnvelope(receiverMail, dateValid) {
  return createPost(url.share, { receiverMail: receiverMail, dateValid: dateValid }, Content.JSON);
}