"""freshporno.org — KVS engine, BEZ `<source>` tagów.

Page używa kt_player (KVS Flash + JS legacy player) — URLs są wewnątrz JavaScript
flashvars JSON (`video_url: 'function/0/<URL>'`) i w `<a href="...?download=true">`
linkach z labelem "MP4 720p" / "MP4 480p".

Bierzemy anchor pattern bo ma WSZYSTKIE quality z explicit labelem (vs flashvars
ma tylko main+alt, max 2 jakości). `<a href="...get_file/...mp4/?download=true...">MP4 <q>p, ...`

Sidebar suggested videos używają `data-preview="...get_file/.../<id>_preview.mp4"` —
inny pattern (nie `<a href>`), więc anchor regex je naturalnie pomija.

CDN token IP-bound do VPS — mobile dostanie 403 na direct, fallback proxy działa.
get_file 302 → `cdn4.freshporno.org/remote_control.php?...&file=<path>` direct mp4
(nie HLS). Type='mp4'.
"""
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__)

# `<a href="<URL>?download=true...">MP4 <quality>p, <size>` — main + alt streams.
_ANCHOR_QUALITY_RE = re.compile(
    r'<a\s+[^>]*href="(?P<url>https?://[^"]+/get_file/[^"]+\.mp4/)\?download=true[^"]*"'
    r'[^>]*>\s*MP4\s+(?P<q>\d{3,4}p)',
    re.IGNORECASE,
)


def extract(page_url: str, *, timeout: float = 60.0) -> list[StreamSource] | None:
    html = fetch_tube_html(page_url, timeout=timeout)

    seen_keys: set[str] = set()
    result: list[StreamSource] = []
    for m in _ANCHOR_QUALITY_RE.finditer(html):
        url = m.group("url")
        quality = m.group("q")
        # Dedupe po basename (path bez query string).
        basename = url.rstrip("/").split("/")[-1]
        if basename in seen_keys:
            continue
        seen_keys.add(basename)
        # `force_proxy=True` (2026-05-20): freshporno get_file 302 → cdn4.freshporno.org
        # IP-bound (cv= HMAC token). Mobile direct = 403/SSL fail → fallback proxy
        # generuje "mrugnięcie" (user bug 743eefbf "najpierw strona potem video").
        # Force_proxy wymusza mobile użycie proxied URL od razu — bez flickera +
        # natywny ExoPlayer + quality picker zachowane.
        result.append(StreamSource(
            link=url, type="mp4", quality=quality,
            raw={"force_proxy": True},
        ))

    if not result:
        log.info("freshporno: no MP4 anchor matches on %s", page_url)
        return None

    def _quality_key(s: StreamSource) -> int:
        if not s.quality:
            return -1
        try:
            return int(s.quality.rstrip("p"))
        except ValueError:
            return -1

    result.sort(key=_quality_key, reverse=True)
    return result