from functools import lru_cache
from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict

BASE_DIR = Path(__file__).resolve().parent.parent


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_prefix="OHM_", env_file=".env", extra="ignore")

    app_name: str = "Ohm Stream Downloader"
    debug: bool = False

    # Données
    data_dir: Path = BASE_DIR / "data"
    download_dir: Path = BASE_DIR / "downloads"
    database_path: Path = BASE_DIR / "data" / "ohm.db"

    # Sécurité — à surcharger via OHM_SECRET_KEY en production
    secret_key: str = "change-me-in-production"
    access_token_ttl_minutes: int = 15
    refresh_token_ttl_days: int = 30

    # Scraping
    http_timeout: float = 20.0
    user_agent: str = "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0"
    scrapers_config_dir: Path = BASE_DIR / "app" / "scrapers" / "configs"

    # Téléchargements
    max_parallel_downloads: int = 3

    # Kitsu
    kitsu_base_url: str = "https://kitsu.io/api/edge"
    metadata_cache_ttl_hours: int = 72

    # Mise à jour (déploiement Docker — Watchtower compagnon)
    watchtower_url: str = ""
    watchtower_token: str = ""

    def ensure_dirs(self) -> None:
        self.data_dir.mkdir(parents=True, exist_ok=True)
        self.download_dir.mkdir(parents=True, exist_ok=True)


@lru_cache
def get_settings() -> Settings:
    settings = Settings()
    settings.ensure_dirs()
    return settings