"""yesporn.vip — KVS engine direct stream extractor.

User bug-report 2026-05-27: "Yespornvip dalej nie działa". Origin `tube:yespornvip`
istniał w playback_sources ale brak wpisu w `_REGISTRY` → `try_extract()` zwracał
None → mobile player no-source.

Detail page sceny linkuje do `/embed/<id>` w iframe. Embed page renderuje KVS
player z `flashvars`:
  - `video_url: 'function/0/https://yesporn.vip/get_file/<srv>/<token>/<bucket>/<id>/<id>.mp4/?embed=true'`
  - `event_reporting2: 'https://yesporn.vip/get_file/.../<id>.mp4/'` (analytics ping
    URL, ale jest valid get_file)
  - `video_url_text: '480p'` — quality label dla video_url

`function/0/` to KVS player JS dekoder prefix — dla type 0 to passthrough,
URL po prefixie jest bezpośrednio użyteczny.

Single-quality (480p) z embed bo wyższe (`video_alt_url`) to redirect URLs
(`video_alt_url_redirect: '1'`), nie direct streamy. CDN time-bound signed,
mobile gra direct.
"""
from __future__ import annotations

import logging
import re

from app.extractors._fetch import fetch_tube_html
from app.extractors._models import StreamSource

log = logging.getLogger(__name__)

_BASE = "https://yesporn.vip"

# `video_url: 'function/0/https://.../get_file/...mp4/?embed=true'` lub bez prefixu
_VIDEO_URL_RE = re.compile(
    r"video_url\s*:\s*'(?:function/0/)?(https?://[^']+/get_file/[^']+\.mp4/?[^']*)'",
    re.IGNORECASE,
)
_QUALITY_RE = re.compile(r"video_url_text\s*:\s*'([^']*)'", re.IGNORECASE)


def extract(page_url: str, *, timeout: float = 60.0) -> list[StreamSource] | None:
    if "/embed/" not in page_url:
        # Detail page → derive embed URL via /video/<id>/<slug>/ → /embed/<id>.
        m = re.search(r"/video/(\d+)/", page_url)
        if m:
            embed_url = f"{_BASE}/embed/{m.group(1)}"
        else:
            log.info("yespornvip: cannot derive embed from %s", page_url)
            return None
    else:
        embed_url = page_url

    html = fetch_tube_html(embed_url, timeout=timeout)

    m = _VIDEO_URL_RE.search(html)
    if not m:
        log.info("yespornvip: no video_url in flashvars on %s", embed_url)
        return None

    url = m.group(1)
    # `?embed=true` parametr — get_file z embed=true może zwracać HTML wrapper
    # zamiast 302 do CDN. Zostawiamy bo player tak go używa, ale jeśli 302 nie
    # wskoczy poprawnie to fallback usunie param.
    quality = None
    q_match = _QUALITY_RE.search(html)
    if q_match:
        quality = q_match.group(1).strip() or None

    return [
        StreamSource(
            link=url,
            type="mp4",
            quality=quality,
            referer=_BASE + "/",
            raw={"mobile_direct_ok": True},
        )
    ]