"""TMDB / TVDB match clients for the video enrichment workers.

Thin adapters: ``.enabled`` (an API key is configured) and ``.match(kind, title,
year) -> {"id", "metadata"} | None``. These talk to real TMDB/TVDB APIs and are
validated against the live services; the worker LOGIC is unit-tested with a fake
client. Keys come from video_settings.
"""

from __future__ import annotations

from utils.logging_config import get_logger

logger = get_logger("video_enrichment.clients")


def _int(val):
    try:
        return int(val)
    except (TypeError, ValueError):
        return None


class TMDBClient:
    BASE = "https://api.themoviedb.org/3"
    IMG = "https://image.tmdb.org/t/p/original"

    def __init__(self, api_key):
        self.api_key = api_key or None

    @property
    def enabled(self):
        return bool(self.api_key)

    def match(self, kind, title, year):
        if not self.api_key or not title:
            return None
        import requests
        path = "/search/movie" if kind == "movie" else "/search/tv"
        params = {"api_key": self.api_key, "query": title}
        if year:
            params["year" if kind == "movie" else "first_air_date_year"] = year
        resp = requests.get(self.BASE + path, params=params, timeout=15)
        results = (resp.json() or {}).get("results") or []
        if not results:
            return None
        top = results[0]
        tmdb_id = top.get("id")
        meta = {"overview": top.get("overview")}
        try:
            detail_path = "/movie/" if kind == "movie" else "/tv/"
            dr = requests.get(self.BASE + detail_path + str(tmdb_id),
                              params={"api_key": self.api_key, "append_to_response": "external_ids"},
                              timeout=15).json() or {}
            meta["overview"] = dr.get("overview") or meta["overview"]
            if dr.get("backdrop_path"):
                meta["backdrop_url"] = self.IMG + dr["backdrop_path"]
            ext = dr.get("external_ids") or {}
            meta["imdb_id"] = ext.get("imdb_id") or dr.get("imdb_id")
            if kind == "movie":
                meta["release_date"] = dr.get("release_date")
            else:
                meta["status"] = dr.get("status")
                meta["tvdb_id"] = _int(ext.get("tvdb_id"))
        except Exception:
            logger.exception("TMDB details fetch failed for %s", title)
        return {"id": tmdb_id, "metadata": {k: v for k, v in meta.items() if v}}


class TVDBClient:
    BASE = "https://api4.thetvdb.com/v4"

    def __init__(self, api_key):
        self.api_key = api_key or None
        self._token = None

    @property
    def enabled(self):
        return bool(self.api_key)

    def _auth(self):
        if self._token:
            return self._token
        import requests
        r = requests.post(self.BASE + "/login", json={"apikey": self.api_key}, timeout=15).json() or {}
        self._token = (r.get("data") or {}).get("token")
        return self._token

    def match(self, kind, title, year):
        if kind != "show" or not self.api_key or not title:
            return None
        import requests
        token = self._auth()
        if not token:
            return None
        r = requests.get(self.BASE + "/search", headers={"Authorization": "Bearer " + token},
                         params={"query": title, "type": "series"}, timeout=15).json() or {}
        results = r.get("data") or []
        if not results:
            return None
        top = results[0]
        tvdb_id = _int(top.get("tvdb_id") or top.get("id"))
        meta = {"overview": top.get("overview")}
        return {"id": tvdb_id, "metadata": {k: v for k, v in meta.items() if v}}


def build_clients(db) -> dict:
    """Construct the source clients from the saved API keys (in video_settings)."""
    return {
        "tmdb": TMDBClient(db.get_setting("tmdb_api_key")),
        "tvdb": TVDBClient(db.get_setting("tvdb_api_key")),
    }