const BASE_URL = "https://tangled.org";

export const DEFAULT_POLL_INTERVAL = 60;

export const getNotificationsUrl = (): string => `${BASE_URL}/notifications`;

export const getNotificationsUrlPattern = (): string =>
  `${BASE_URL}/notifications*`;

export interface NotificationResult {
  count: number;
  pollInterval: number;
}

export const fetchNotificationCount = async (): Promise<NotificationResult> => {
  const response = await fetch(`${BASE_URL}/notifications/count`, {
    credentials: "include",
  });
  // FIX: requires backend to return 401 when not logged in (currently returns 200 even if not logged in)
  if (!response.ok) throw new Error(`HTTP ${response.status}`);
  const html = await response.text();
  const match = html.match(/(\d+)/);
  const pollInterval =
    Number(response.headers.get("X-Poll-Interval")) || DEFAULT_POLL_INTERVAL;
  return {
    count: match ? parseInt(match[1], 10) : 0,
    pollInterval,
  };
};