"""TheTVDB API Client mit Caching."""

import requests
from typing import Dict, List, Optional

from config import settings
from cache import get, set, delete


THETVDB_BASE_URL = "https://api.thetvdb.com"


class TheTVDBClient:
    def __init__(self):
        self.api_key = settings.thetvdb_api_key
        self.base_url = THETVDB_BASE_URL
        self.session = requests.Session()
        self.session.headers.update({
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        })
        self._cached_token = None
    
    def _get_token(self) -> str:
        """Hole API-Token (gecachted)."""
        if self._cached_token:
            return self._cached_token
        
        try:
            response = self.session.post(
                f"{self.base_url}/login",
                json={"apikey": self.api_key},
                timeout=10
            )
            response.raise_for_status()
            
            data = response.json()
            if "token" in data:
                self._cached_token = data["token"]
                return self._cached_token
        except Exception as e:
            print(f"TheTVDB Login Error: {e}")
        
        return ""
    
    def _request(self, endpoint: str, params: Dict = None) -> Optional[Dict]:
        """Mache API-Request mit Caching."""
        cache_key = f"thetvdb:{endpoint}:{params or {}}"
        
        cached = get(cache_key)
        if cached:
            return cached
        
        try:
            self.session.headers.update({
                "Authorization": f"Bearer {self._get_token()}"
            })
            
            response = self.session.get(
                f"{self.base_url}/{endpoint}",
                params=params,
                timeout=10
            )
            response.raise_for_status()
            data = response.json()
            
            set(cache_key, data)
            return data
        except Exception as e:
            print(f"TheTVDB API Error: {e}")
            return None
    
    def search_series(self, name: str) -> List[Dict]:
        """Suche Serien."""
        params = {"name": name}
        result = self._request("search/series", params)
        
        if result and "data" in result:
            return result["data"]
        return []
    
    def get_series_details(self, series_id: int) -> Optional[Dict]:
        """Hole Serien-Details."""
        return self._request(f"series/{series_id}")
    
    def get_episode_details(self, series_id: int, episode_id: int) -> Optional[Dict]:
        """Hole Episode-Details."""
        return self._request(f"series/{series_id}/episodes/{episode_id}")
    
    def get_series_images(self, series_id: int) -> Dict[str, str]:
        """Hole Serien-Poster/Fanart URLs."""
        params = {"type": "poster"}
        result = self._request(f"series/{series_id}/images/query", params)
        
        if result and "data" in result:
            images = result["data"]
            # Finde Poster und Fanart
            poster = next((img for img in images if img.get("subKey") == "poster"), None)
            fanart = next((img for img in images if img.get("subKey") == "fanart"), None)
            
            return {
                "poster": f"{self.base_url}/images/series/{series_id}_{poster['fileName']}" if poster else "",
                "fanart": f"{self.base_url}/images/series/{series_id}_{fanart['fileName']}" if fanart else ""
            }
        return {}
    
    def clear_cache(self) -> None:
        """Leere TheTVDB-Cache."""
        delete("thetvdb:*")