"""BasePlayTubeScraper — wspólna baza dla tube'ów na PlayTube CMS (hqfap, 4k69).

Platforma rozpoznawalna po: `/watch/<slug>_<id>.html`, sitemap index
`/sitemaps/videos/sitemap-N.xml` (z `<lastmod>`), JSON-LD VideoObject na detail
page'u (name + uploadDate + duration ISO 8601 + thumbnailUrl + contentUrl) oraz
pillach `<a class='pill' href='/videos/pornstar|category/<Name>'>`.

Listing NIE paginuje się GET-em (PlayTube doładowuje AJAX-em `aj/load-more/`),
więc crawl_page buduje katalog z sitemapów (sort lastmod desc = newest first)
i tnie na strony po `_PAGE_SIZE`. Działa dla browse_latest (pages 1-5) i
deep_crawl (kursor do końca katalogu). Minus: sitemap laguje ~dobę za
najświeższymi uploadami — akceptowalne przy dziennym harmonogramie.

Subclass ustawia `base_url` + (opcjonalnie) override'uje `_pick_studio()` —
PlayTube nie ma strukturalnego pola studio na scenie, studio siedzi w
kategoriach (hqfap: suffix " Clips"; 4k69: nazwa z listy /studios).

Cloudflare: HTML wymaga browser TLS (curl_cffi w browser_get); plain curl z VPS
dostaje 403. Sitemapy i thumbnaile schodzą bez challenge'a.
"""
from __future__ import annotations

import json
import logging
import re
from datetime import date, datetime

from app.connectors.base import (
    RawFingerprint,
    RawPerformer,
    RawPlaybackSource,
    RawScene,
    RawStudio,
    RawTag,
)
from app.connectors.direct_scrapers._browse_base import (
    BaseBrowseScraper,
    compute_thumbnail_phash,
)
from app.extractors import browser_get
from app.normalize.text import slugify

log = logging.getLogger(__name__)

_PAGE_SIZE = 20

_SITEMAP_LOC_RE = re.compile(r"<loc>\s*([^<]+?)\s*</loc>")
_URL_BLOCK_RE = re.compile(r"<url>(.*?)</url>", re.DOTALL | re.IGNORECASE)
_LASTMOD_RE = re.compile(r"<lastmod>\s*([^<]+?)\s*</lastmod>")
_SCENE_ID_RE = re.compile(r"_(\d+)\.html")

_JSONLD_RE = re.compile(
    r'<script[^>]+type=["\']application/ld\+json["\'][^>]*>(.*?)</script>',
    re.IGNORECASE | re.DOTALL,
)
_ISO_DUR_RE = re.compile(r"^P?T?(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?$", re.IGNORECASE)

# Pille performera/kategorii. PlayTube renderuje single-quoted attrs; dopuszczamy
# oba quote'y. Nazwa z `<span itemprop='name'>` (href bywa URL-encoded / ze spacjami).
_PILL_RE = re.compile(
    r"<a\s+class=['\"]pill['\"]\s+href=['\"]/videos/(?P<kind>pornstar|category)/[^'\"]*['\"]"
    r".*?<span itemprop=['\"]name['\"]>(?P<name>[^<]+)</span>",
    re.IGNORECASE | re.DOTALL,
)


def _parse_iso_duration(value: str | None) -> int | None:
    """`PT26M48S` → sekundy. None gdy format nieznany."""
    if not value:
        return None
    m = _ISO_DUR_RE.match(value.strip())
    if not m:
        return None
    total = int(m.group(1) or 0) * 3600 + int(m.group(2) or 0) * 60 + int(m.group(3) or 0)
    return total or None


def _parse_iso_date(value: str | None) -> date | None:
    """`2026-06-09T16:00:00+00:00` → date. None gdy parse fail."""
    if not value:
        return None
    try:
        return datetime.fromisoformat(value.replace("Z", "+00:00")).date()
    except ValueError:
        m = re.match(r"(\d{4}-\d{2}-\d{2})", value)
        if m:
            try:
                return date.fromisoformat(m.group(1))
            except ValueError:
                return None
        return None


def _extract_video_object(html: str) -> dict | None:
    """Pierwszy JSON-LD VideoObject w HTML (PlayTube emituje jeden, płaski dict)."""
    for m in _JSONLD_RE.finditer(html):
        raw = m.group(1).strip()
        if not raw:
            continue
        try:
            data = json.loads(raw)
        except (json.JSONDecodeError, ValueError):
            continue
        items = data if isinstance(data, list) else [data]
        for obj in items:
            if isinstance(obj, dict) and obj.get("@type") == "VideoObject":
                return obj
    return None


class BasePlayTubeScraper(BaseBrowseScraper):
    base_url: str  # np. "https://hqfap.com" — subclass ustawia

    def __init__(self) -> None:
        super().__init__()
        # Katalog URL-i scen z sitemap, newest-first. Lazy-init raz per instancję
        # (browse_latest i deep_crawl tworzą instancję per run, więc kilkanaście
        # fetchy XML amortyzuje się na cały run).
        self._catalog: list[str] | None = None

    # Hook: wybierz studio spośród nazw kategorii (display name) albo None.
    # Wybrana kategoria NIE trafia do tagów.
    def _pick_studio(self, category_names: list[str]) -> str | None:
        return None

    # crawl_page override (jak EpornerApiScraper) — listing nie jest stronicowalny
    # przez GET, źródłem paginacji jest sitemap. _listing_url/_extract_scene_urls
    # nieużywane, ale abstrakcyjne — dostarczamy no-op implementacje.
    def _listing_url(self, page: int) -> str:  # pragma: no cover - nieużywane
        return f"{self.base_url}/sitemap.xml"

    def _extract_scene_urls(self, listing_html: str) -> list[str]:  # pragma: no cover
        return []

    def _load_catalog(self) -> list[str] | None:
        """Pełna lista URL-i scen posortowana lastmod desc. None = fetch fail."""
        if self._catalog is not None:
            return self._catalog
        index_url = f"{self.base_url}/sitemap.xml"
        try:
            idx = browser_get(index_url, timeout=self._timeout)
            idx.raise_for_status()
        except Exception as e:
            log.warning("%s: sitemap index fetch failed: %s", self.sitetag, e)
            return None
        sitemap_urls = [
            u for u in _SITEMAP_LOC_RE.findall(idx.text) if "/videos/sitemap-" in u
        ]
        if not sitemap_urls:
            log.warning("%s: sitemap index has no video sitemaps", self.sitetag)
            return None

        entries: list[tuple[str, str]] = []  # (lastmod, scene_url)
        for sm_url in sitemap_urls:
            try:
                sm = browser_get(sm_url, timeout=self._timeout)
                sm.raise_for_status()
            except Exception as e:
                # Brak jednego sitemapa ≠ fail całości — reszta katalogu wystarczy.
                log.warning("%s: sitemap fetch failed %s: %s", self.sitetag, sm_url, e)
                continue
            for block in _URL_BLOCK_RE.findall(sm.text):
                loc_m = _SITEMAP_LOC_RE.search(block)
                if not loc_m or "/watch/" not in loc_m.group(1):
                    continue
                lastmod_m = _LASTMOD_RE.search(block)
                entries.append((lastmod_m.group(1) if lastmod_m else "", loc_m.group(1)))

        if not entries:
            return None
        # Dedup po scene id (sitemap potrafi powtórzyć URL między plikami).
        entries.sort(key=lambda e: e[0], reverse=True)
        seen_ids: set[str] = set()
        catalog: list[str] = []
        for _, url in entries:
            id_m = _SCENE_ID_RE.search(url)
            key = id_m.group(1) if id_m else url
            if key in seen_ids:
                continue
            seen_ids.add(key)
            catalog.append(url)
        log.info("%s: catalog loaded — %d scenes from %d sitemaps",
                 self.sitetag, len(catalog), len(sitemap_urls))
        self._catalog = catalog
        return catalog

    def crawl_page(self, page: int) -> list[RawScene] | None:
        catalog = self._load_catalog()
        if catalog is None:
            return None
        start = (page - 1) * _PAGE_SIZE
        chunk = catalog[start:start + _PAGE_SIZE]
        if not chunk:
            return []
        out: list[RawScene] = []
        for scene_url in chunk:
            try:
                res = browser_get(scene_url, timeout=self._timeout)
                res.raise_for_status()
            except Exception as e:
                log.info("%s detail fetch failed %s: %s", self.sitetag, scene_url, e)
                continue
            try:
                raw = self._parse_detail(scene_url, res.text)
            except Exception as e:
                log.warning("%s detail parse failed %s: %s", self.sitetag, scene_url, e)
                continue
            if raw is not None:
                out.append(raw)
        return out

    def _parse_detail(self, scene_url: str, detail_html: str) -> RawScene | None:
        video = _extract_video_object(detail_html)
        if not video:
            log.info("%s: no JSON-LD VideoObject on %s", self.sitetag, scene_url)
            return None

        title = (video.get("name") or "").strip()
        if not title:
            return None

        id_m = _SCENE_ID_RE.search(scene_url)
        scene_id = id_m.group(1) if id_m else None

        duration_sec = _parse_iso_duration(video.get("duration"))
        release_date = _parse_iso_date(video.get("uploadDate"))
        thumbnail_url = video.get("thumbnailUrl") or None

        # Pille: pornstar → performer; category → studio (hook `_pick_studio`)
        # albo tag. Ocenzurowane nazwy (`Te***`) pomijamy — gwiazdki to nie dane.
        performers: list[RawPerformer] = []
        category_names: list[str] = []
        seen_perf: set[str] = set()
        for m in _PILL_RE.finditer(detail_html):
            name = m.group("name").strip()
            if not name or "*" in name:
                continue
            if m.group("kind").lower() == "pornstar":
                slug = slugify(name)
                if slug and slug not in seen_perf:
                    seen_perf.add(slug)
                    performers.append(
                        RawPerformer(external_id=f"{self.sitetag}:performer:{slug}", name=name)
                    )
            elif name not in category_names:
                category_names.append(name)

        studio: RawStudio | None = None
        studio_name = self._pick_studio(category_names)
        if studio_name:
            studio = RawStudio(
                external_id=f"{self.sitetag}:studio:{slugify(studio_name)}",
                name=studio_name,
                slug=slugify(studio_name),
            )

        tags: list[RawTag] = []
        seen_tag: set[str] = set()
        picked = (studio_name or "").strip().lower()
        for name in category_names:
            # Studio-kategoria nie idzie do tagów (ani w wersji z suffixem " Clips").
            if picked and name.strip().lower() in (picked, picked + " clips"):
                continue
            slug = slugify(name)
            if not slug or slug in seen_tag:
                continue
            seen_tag.add(slug)
            tags.append(RawTag(external_id=f"{self.sitetag}:tag:{slug}", name=name, slug=slug))

        # Phash: thumbnaile bywają re-encodowanym studio art (szansa na match),
        # dla amatorskiego contentu nie zmatchują. Graceful: miss → composite scoring.
        fingerprints: list[RawFingerprint] = []
        if thumbnail_url:
            ph = compute_thumbnail_phash(thumbnail_url, referer=self.base_url + "/")
            if ph:
                fingerprints.append(RawFingerprint(kind="phash", value=ph))

        # Stream: JSON-LD contentUrl wygasa (token time-bound) — NIE zapisujemy
        # stream_url; extractor per-sitetag resolvuje świeży on-demand.
        playback_sources = [
            RawPlaybackSource(
                origin=f"tube:{self.sitetag}",
                page_url=scene_url,
                duration_sec=duration_sec,
                thumbnail_url=thumbnail_url,
            )
        ]

        return RawScene(
            external_id=f"{self.sitetag}:{scene_id or scene_url}",
            title=title,
            release_date=release_date,
            duration_sec=duration_sec,
            url=scene_url,
            studio=studio,
            performers=performers,
            tags=tags,
            fingerprints=fingerprints,
            playback_sources=playback_sources,
        )