"""ThePornDB REST connector.

API: https://api.theporndb.net  (auth: Bearer token)
Lista scen: GET /scenes?per_page=200&page=N&date={YYYY-MM-DD}  (delta filter)
Format: {data: [...], meta: {current_page, last_page, per_page, total}}

Sceny TPDB zwracają już rozwiniętych performerów (`performers[]`), studio (`site`) i tagi (`tags[]`).
W związku z tym pojedyncze GET /scenes wystarcza do MVP, nie musimy uderzać oddzielnie po performera.

Format performera w scenie:
  - performer.id          ID przypisania performer↔scene (NIE używać do dedup)
  - performer.name        imię w tej konkretnej scenie (może być alias, np. „Mia M.")
  - performer.parent.id, kanoniczne UUID performerki w TPDB → external_id
  - performer.parent.name / .extra.gender / .extra.birthday, kanoniczne metadane

Format studia: scene.site = {id, name, slug, parent: {...}, network: {...}}
"""
from __future__ import annotations

import logging
from collections.abc import Iterator
from datetime import date, datetime
from typing import Any

import httpx
from tenacity import (
    retry,
    retry_if_exception,
    retry_if_exception_type,
    stop_after_attempt,
    wait_exponential,
)


def _is_retryable_http_error(exc: BaseException) -> bool:
    """Retry transport errors + 5xx + 429; NIE retry 4xx (404/422 = permanent).

    401/403 NIE są retryowalne tutaj, TPDB token expiry musiałby być
    obsłużony jako auth refresh (TODO gdyby zaczęły się pojawiać). Aktualnie
    expire'a się raz na rok, więc nie warto kombinować.
    """
    if isinstance(exc, httpx.TransportError):
        return True
    if isinstance(exc, httpx.HTTPStatusError):
        sc = exc.response.status_code
        return sc == 429 or sc >= 500
    return False

from app.config import get_settings
from app.connectors.base import (
    BaseConnector,
    RawMovie,
    RawPerformer,
    RawScene,
    RawStudio,
    RawTag,
)
from app.models.source import SourceKind

log = logging.getLogger(__name__)


class TPDBConnector(BaseConnector):
    kind = SourceKind.tpdb
    name = "tpdb"

    def __init__(
        self,
        *,
        token: str | None = None,
        base_url: str | None = None,
        per_page: int = 100,
        timeout: float = 30.0,
    ) -> None:
        settings = get_settings()
        self.token = token or settings.tpdb_api_token
        if not self.token:
            raise RuntimeError("TPDB_API_TOKEN is not set")
        self.base_url = (base_url or settings.tpdb_base_url).rstrip("/")
        self.per_page = per_page
        self.timeout = timeout

    def _client(self) -> httpx.Client:
        return httpx.Client(
            base_url=self.base_url,
            headers={
                "Authorization": f"Bearer {self.token}",
                "Accept": "application/json",
                "User-Agent": "goon/0.1",
            },
            timeout=self.timeout,
        )

    @retry(
        retry=retry_if_exception(_is_retryable_http_error),
        wait=wait_exponential(multiplier=1, min=2, max=30),
        stop=stop_after_attempt(5),
        reraise=True,
    )
    def _get(self, client: httpx.Client, path: str, params: dict[str, Any]) -> dict[str, Any]:
        resp = client.get(path, params=params)
        if resp.status_code == 429:
            # let tenacity retry, but raise something it knows
            raise httpx.HTTPStatusError("rate limited", request=resp.request, response=resp)
        resp.raise_for_status()
        return resp.json()

    def fetch_scenes(
        self,
        *,
        since: datetime | None = None,
        limit: int | None = None,
    ) -> Iterator[RawScene]:
        params: dict[str, Any] = {"per_page": self.per_page}
        if since is not None:
            params["date"] = since.date().isoformat()

        yield from self._paginate_scenes(params, limit=limit)

    def fetch_scenes_for_performer(
        self,
        performer_external_id: str,
        *,
        limit: int | None = None,
    ) -> Iterator[RawScene]:
        """Pobiera wszystkie sceny TPDB dla performera o podanym kanonicznym ID.

        TPDB API: GET /performers/<id>/scenes, dedykowany endpoint.
        (Inne warianty są broken: /scenes?performers[]=<uuid> zwraca zawsze total=0,
        /scenes?performer_id=<uuid> → 422.)

        404 = performer usunięty z TPDB (np. b959ccbb 2026-05-16 Sentry GOON-N).
        Wcześniej leciało raise → exception bąbelek do scheduler.performer_driven
        → cały run failed. Teraz warn + yield empty, caller widzi 0 scen i
        kontynuuje z następnym performer.
        """
        try:
            yield from self._paginate_scenes(
                {"per_page": self.per_page},
                limit=limit,
                path=f"/performers/{performer_external_id}/scenes",
            )
        except httpx.HTTPStatusError as e:
            if e.response.status_code == 404:
                log.warning(
                    "tpdb performer %s removed (404) — skipping",
                    performer_external_id,
                )
                return
            raise

    def fetch_scenes_for_site(
        self,
        site_external_id: str,
        *,
        limit: int | None = None,
    ) -> Iterator[RawScene]:
        """Pobiera wszystkie sceny TPDB dla site/studio o podanym ID.

        TPDB API: GET /sites/<id>/scenes, dedykowany endpoint analogiczny
        do /performers/<id>/scenes. Bez paginacji limit zwraca total scenes
        z meta.total (Brazzers=272, Naughty America=631 w czasie pisania).

        404 = site usunięty z TPDB, analogicznie do fetch_scenes_for_performer.
        """
        try:
            yield from self._paginate_scenes(
                {"per_page": self.per_page},
                limit=limit,
                path=f"/sites/{site_external_id}/scenes",
            )
        except httpx.HTTPStatusError as e:
            if e.response.status_code == 404:
                log.warning(
                    "tpdb site %s removed (404) — skipping",
                    site_external_id,
                )
                return
            raise

    def find_performer_id_by_name(self, name: str) -> str | None:
        """GET /performers?q=<name> → pierwszy match. None gdy brak."""
        with self._client() as client:
            try:
                payload = self._get(client, "/performers", {"q": name, "per_page": 5})
            except httpx.HTTPStatusError as e:
                log.warning("tpdb /performers q=%s failed: %s", name, e)
                return None
        data = payload.get("data") or []
        if not data:
            return None
        for item in data:
            # exact (case-insensitive) match preferowany; fallback do pierwszego
            if (item.get("name") or "").strip().lower() == name.strip().lower():
                return str(item.get("id")) if item.get("id") else None
        first = data[0]
        return str(first.get("id")) if first.get("id") else None

    def search_movies(self, query: str, *, per_page: int = 10) -> list[dict[str, Any]]:
        """GET /movies?q=<query> → surowe payloady filmów (list endpoint jest już
        hydrated: tags + performers + site embedded, bez detail-fetcha).

        Używane do enrichmentu movies: wyszukujemy kandydatów po tytule, scorujemy
        i mapujemy najlepszy przez `_parse_movie`. Pusty list na błąd/brak."""
        if not query.strip():
            return []
        with self._client() as client:
            try:
                payload = self._get(client, "/movies", {"q": query, "per_page": per_page})
            except httpx.HTTPStatusError as e:
                log.warning("tpdb /movies q=%s failed: %s", query, e)
                return []
        return payload.get("data") or []

    def fetch_movie(self, movie_uuid: str) -> dict[str, Any] | None:
        """GET /movies/<uuid> → pojedynczy film (detail). None gdy 404/błąd.

        NB: list endpoint jest już hydrated, więc detail rzadko potrzebny, trzymamy
        dla spójności / gdyby TPDB kiedyś przeniósł część pól tylko do detalu."""
        with self._client() as client:
            try:
                payload = self._get(client, f"/movies/{movie_uuid}", {})
            except httpx.HTTPStatusError as e:
                if e.response.status_code == 404:
                    return None
                log.warning("tpdb /movies/%s failed: %s", movie_uuid, e)
                return None
        return payload.get("data")

    def _paginate_scenes(
        self,
        params: dict[str, Any],
        *,
        limit: int | None,
        path: str = "/scenes",
    ) -> Iterator[RawScene]:
        emitted = 0
        page = 1
        with self._client() as client:
            while True:
                params["page"] = page
                payload = self._get(client, path, params)
                data = payload.get("data") or []
                if not data:
                    return
                for raw in data:
                    scene = _parse_scene(raw)
                    if scene is None:
                        continue
                    yield scene
                    emitted += 1
                    if limit is not None and emitted >= limit:
                        return

                meta = payload.get("meta") or {}
                last_page = meta.get("last_page") or page
                if page >= last_page:
                    return
                page += 1


def _parse_date(value: Any) -> date | None:
    if not value:
        return None
    if isinstance(value, date):
        return value
    text = str(value).strip()
    if not text:
        return None
    # TPDB dates: "YYYY-MM-DD" lub ISO datetime
    try:
        return date.fromisoformat(text[:10])
    except ValueError:
        return None


def _parse_studio(raw: dict[str, Any] | None) -> RawStudio | None:
    if not raw:
        return None
    parent = raw.get("parent") or {}
    network = raw.get("network") or {}
    return RawStudio(
        external_id=str(raw["id"]) if raw.get("id") is not None else None,
        name=raw.get("name") or "Unknown",
        slug=raw.get("short_name") or raw.get("slug"),
        parent_external_id=str(parent["id"]) if parent.get("id") is not None else None,
        parent_name=parent.get("name"),
        network=network.get("name") if isinstance(network, dict) else None,
        homepage_url=raw.get("url") or raw.get("home"),
    )


def _parse_performer(raw: dict[str, Any]) -> RawPerformer | None:
    parent = raw.get("parent") or {}
    extra = parent.get("extras") or parent.get("extra") or {}
    canonical_id = parent.get("id") or raw.get("id")
    canonical_name = parent.get("name") or raw.get("name")
    if not canonical_name:
        return None
    aliases_field = parent.get("aliases") or extra.get("aliases") or []
    if isinstance(aliases_field, str):
        aliases = [a.strip() for a in aliases_field.split(",") if a.strip()]
    else:
        aliases = [a for a in aliases_field if isinstance(a, str)]
    return RawPerformer(
        external_id=str(canonical_id) if canonical_id is not None else None,
        name=canonical_name,
        aliases=aliases,
        gender=(extra.get("gender") or parent.get("gender") or "").lower() or None,
        birth_date=_parse_date(extra.get("birthday")),
        country=extra.get("birthplace") or extra.get("country"),
        as_alias_in_scene=raw.get("name") if raw.get("name") != canonical_name else None,
    )


def _parse_tag(raw: dict[str, Any]) -> RawTag | None:
    name = raw.get("name")
    if not name:
        return None
    return RawTag(
        external_id=str(raw["id"]) if raw.get("id") is not None else None,
        name=name,
        slug=raw.get("slug"),
    )


def _parse_scene(raw: dict[str, Any]) -> RawScene | None:
    external_id = raw.get("id")
    title = raw.get("title")
    if not external_id or not title:
        log.warning("tpdb scene without id/title — skipping (keys=%s)", list(raw)[:8])
        return None

    performers: list[RawPerformer] = []
    for p in raw.get("performers") or []:
        parsed = _parse_performer(p)
        if parsed is not None:
            performers.append(parsed)

    tags: list[RawTag] = []
    for t in raw.get("tags") or []:
        parsed_t = _parse_tag(t)
        if parsed_t is not None:
            tags.append(parsed_t)


    return RawScene(
        external_id=str(external_id),
        title=title,
        description=raw.get("description"),
        release_date=_parse_date(raw.get("date")),
        duration_sec=int(raw["duration"]) if raw.get("duration") else None,
        code=raw.get("external_id"),
        director=raw.get("director"),
        url=raw.get("url"),
        studio=_parse_studio(raw.get("site")),
        performers=performers,
        tags=tags,
        fingerprints=[],  # TPDB nie publikuje pHashy w głównym endpoint
        raw=raw,
    )


def _parse_movie(raw: dict[str, Any]) -> RawMovie | None:
    """TPDB movie payload → RawMovie. Reużywa _parse_studio/_parse_performer/_parse_tag
    (movies mają identyczny kształt site/performers/tags co sceny)."""
    external_id = raw.get("id")
    title = raw.get("title")
    if not external_id or not title:
        return None

    performers: list[RawPerformer] = []
    for p in raw.get("performers") or []:
        parsed = _parse_performer(p)
        if parsed is not None:
            performers.append(parsed)
    tags: list[RawTag] = []
    for t in raw.get("tags") or []:
        parsed_t = _parse_tag(t)
        if parsed_t is not None:
            tags.append(parsed_t)

    directors = raw.get("directors") or []
    director = ", ".join(d.get("name") for d in directors if isinstance(d, dict) and d.get("name")) or None

    d = _parse_date(raw.get("date"))
    # duration bywa 1s-placeholderem na movies, poniżej 60s traktujemy jak brak.
    dur = raw.get("duration")
    duration_sec = int(dur) if dur and int(dur) > 60 else None

    def _img(field: str) -> str | None:
        v = raw.get(field)
        if isinstance(v, str) and v:
            return v
        if isinstance(v, dict):
            return v.get("large") or v.get("full") or v.get("medium") or None
        return None

    poster = _img("poster") or _img("posters")
    backdrop = _img("background") or _img("backdrop")

    return RawMovie(
        external_id=str(external_id),
        title=title,
        description=raw.get("description"),
        release_year=d.year if d else None,
        release_date=d,
        duration_sec=duration_sec,
        director=director,
        rating=float(raw["rating"]) if raw.get("rating") not in (None, "") else None,
        poster_url=poster,
        backdrop_url=backdrop,
        url=raw.get("url"),
        studio=_parse_studio(raw.get("site")),
        performers=performers,
        tags=tags,
        raw=raw,
    )