/**
 * Mobile-side hqfap.com resolver.
 *
 * hqfap.com Cloudflare blokuje IP VPS (Hetzner: timeout, 0 bajtów) ale strona odpowiada
 * 200 z residential IP (audit 2026-07-14: local 200/0.7s, VPS + Bright Data proxy oba
 * timeout). Backend resolve więc pada (None → 503) albo oddaje URL zbindowany do kontekstu
 * VPS → player_error. Strumień (okcdn.ru / vstor.top / cdnde, direct mp4 z JSON-LD
 * contentUrl) jest PORTABLE cross-IP (srcIp NIEegzekwowany, zweryfikowane 206 z residential).
 *
 * Fix: telefon sam pobiera stronę (residential IP) → JSON-LD contentUrl → gra direct, zero
 * VPS. Mirror app/extractors/tubes/hqfap.py. Zwraca [] gdy brak (caller spada na backend).
 */
import type { StreamLink } from '../types';

const UA =
  'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36';

const _CONTENT_URL_RE = /"contentUrl"\s*:\s*"([^"]+)"/;
const _QUALITY_RE = /_(\d{3,4})p\.mp4/i;

/** True dla page_url hqfap (origin tube:hqfapcom). */
export function isHqfapUrl(url: string | null | undefined): boolean {
  return !!url && /(?:^|\/\/|\.)hqfap\.com\//i.test(url);
}

export async function resolveHqfapPage(pageUrl: string): Promise<StreamLink[]> {
  let html: string;
  try {
    const r = await fetch(pageUrl, { headers: { 'User-Agent': UA, Accept: 'text/html' } });
    if (!r.ok) return [];
    html = await r.text();
  } catch {
    return [];
  }
  const m = _CONTENT_URL_RE.exec(html);
  let contentUrl = m ? m[1].trim() : '';
  contentUrl = contentUrl.replace(/\\\//g, '/'); // JSON-LD bywa z escaped slash
  if (!contentUrl.startsWith('http')) return [];
  // Stub guard: `/upload/videos/video_down.mp4` = stały "server down" placeholder
  // (powód usunięcia strony 2026-06-25). Lepiej żadne źródło niż stub.
  if (contentUrl.includes('/upload/videos/video_down.mp4')) return [];
  const qm = _QUALITY_RE.exec(contentUrl);
  return [
    {
      stream_url: contentUrl,
      direct_url: contentUrl,
      headers: { Referer: 'https://hqfap.com/', 'User-Agent': UA },
      quality: qm ? `${qm[1]}p` : 'auto',
      type: 'mp4',
    },
  ];
}