export interface ProxyHost {
  domain_names: string[];
  forward_host: string;
  forward_port: number;
  enabled: boolean;
}

const NPM_BASE = process.env.NPM_BASE_URL ?? 'http://localhost:81';
const NPM_EMAIL = process.env.NPM_EMAIL ?? '';
const NPM_SECRET = process.env.NPM_SECRET ?? '';

const rawPatterns = (process.env.NPM_INCLUDE_PATTERNS ?? '\\.goonk\\.se$,\\.dev\\.xplwd\\.com$')
  .split(',').map(p => new RegExp(p.trim()));
const INCLUDE_PATTERNS = rawPatterns;

let token: string | null = null;
let tokenExpiry = 0;

async function getToken(): Promise<string> {
  if (token && Date.now() < tokenExpiry) return token;
  const res = await fetch(`${NPM_BASE}/api/tokens`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ identity: NPM_EMAIL, secret: NPM_SECRET }),
  });
  const data = await res.json() as { token: string; expires: string };
  token = data.token;
  tokenExpiry = new Date(data.expires).getTime() - 60_000;
  return token;
}

export async function fetchProxyHosts(): Promise<ProxyHost[]> {
  const tok = await getToken();
  const res = await fetch(`${NPM_BASE}/api/nginx/proxy-hosts`, {
    headers: { Authorization: `Bearer ${tok}` },
  });
  const all = await res.json() as ProxyHost[];
  return all.filter(h =>
    h.enabled &&
    h.domain_names.some(d => INCLUDE_PATTERNS.some(p => p.test(d)))
  );
}