"""Application configuration using pydantic-settings."""

from functools import lru_cache
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""

    # Database
    database_url: str = "postgresql://gdl:password@localhost:5432/gallery_subscriber"

    # Redis
    redis_url: str = "redis://localhost:6379/0"

    # Security
    secret_key: str = "change-me-in-production"
    # Note: extension_api_key is now stored in database and auto-generated

    # Paths
    download_path: str = "/data/downloads"
    config_path: str = "/data/config"
    cookies_path: str = "/data/cookies"

    # Download settings
    download_parallel_limit: int = 3
    download_rate_limit: float = 3.0
    # Note: check_interval is now per-source and stored in database

    # Server
    host: str = "0.0.0.0"
    port: int = 8080
    debug: bool = False
    log_level: str = "INFO"

    @property
    def async_database_url(self) -> str:
        """Convert database URL to async version for asyncpg."""
        return self.database_url.replace("postgresql://", "postgresql+asyncpg://")

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"


@lru_cache
def get_settings() -> Settings:
    """Get cached settings instance."""
    return Settings()