"""OMDb API Client — Fallback-Quelle für die Metadaten-Erkennung.

Kommt zum Zug, wenn TMDB nichts (Sicheres) findet. Kostenloser Key von
https://www.omdbapi.com/apikey.aspx (1000 Anfragen/Tag reichen fürs Heimlab).
"""

from typing import Dict, Optional

import requests

from cache import get, set as cache_set
from config import settings

OMDB_BASE_URL = "https://www.omdbapi.com/"


def parse_runtime_minutes(runtime: str) -> int:
    """OMDb liefert '142 min' als Text → Minuten als Zahl (pure Funktion, testbar)."""
    if not runtime:
        return 0
    teil = runtime.strip().split(" ")[0]
    return int(teil) if teil.isdigit() else 0


def parse_year(year: str) -> Optional[int]:
    """OMDb-Jahr kann '1999' oder '2005–2012' (Serie) sein → erstes Jahr."""
    if not year:
        return None
    erste = year.strip()[:4]
    return int(erste) if erste.isdigit() else None


class OMDbClient:
    def __init__(self):
        self.api_key = settings.omdb_api_key
        self.session = requests.Session()

    def lookup(self, title: str, year: Optional[int] = None) -> Optional[Dict]:
        """Sucht per Titel (t=), liefert normalisierte Metadaten oder None."""
        if not self.api_key:
            return None

        cache_key = f"omdb:{title.lower()}:{year or ''}"
        cached = get(cache_key)
        if cached:
            return cached

        params = {"apikey": self.api_key, "t": title, "r": "json"}
        if year:
            params["y"] = str(year)

        try:
            response = self.session.get(OMDB_BASE_URL, params=params, timeout=10)
            response.raise_for_status()
            data = response.json()
        except Exception as e:
            print(f"OMDb API Error: {e}")
            return None

        if data.get("Response") != "True":
            return None

        ergebnis = {
            "type": "tv" if data.get("Type") == "series" else "movie",
            "id": data.get("imdbID", ""),
            "title": data.get("Title", title),
            "year": parse_year(data.get("Year", "")),
            "overview": data.get("Plot", ""),
            "poster_path": data.get("Poster", "") if data.get("Poster") != "N/A" else "",
            "backdrop_path": "",
            "runtime": parse_runtime_minutes(data.get("Runtime", "")),
            "genres": [g.strip() for g in data.get("Genre", "").split(",") if g.strip()],
            "source": "omdb",
        }
        cache_set(cache_key, ergebnis)
        return ergebnis