// Plain URL reachability check for public pages (privacy policy, app-ads.txt). No credentials are ever sent.
import type { UrlCheck } from './validate-rules';

export async function checkUrl(url: string, o: { body?: boolean; timeoutMs?: number } = {}): Promise<UrlCheck> {
  try {
    const r = await fetch(url, { redirect: 'follow', signal: AbortSignal.timeout(o.timeoutMs ?? 15_000), headers: { 'User-Agent': 'storebound-validate' } });
    const body = o.body ? (await r.text()).slice(0, 200_000) : undefined;
    if (!o.body) await r.body?.cancel();
    return { url, status: r.status, body };
  } catch (e) {
    return { url, status: null, error: (e as Error).message };
  }
}

/**
 * An API error body for an Error message: JSON on one line (App Store Connect and Google pretty-print their errors,
 * which broke tables, `lastLine` in serve and matching on the error reason), an HTML page named as such, else the text
 * with its whitespace collapsed. At most `max` characters.
 */
export function errorBody(text: string, max = 1500): string {
  if (/^\s*</.test(text)) return '(HTML error page)';
  let s: string;
  try { s = JSON.stringify(JSON.parse(text)); } catch { s = text.replace(/\s+/g, ' ').trim(); }
  return s.length > max ? s.slice(0, max) + '…' : s;
}