from pydantic_settings import BaseSettings
from typing import Optional

class Settings(BaseSettings):
    APP_TITLE: str = "Quantum Healthcare Navigator"
    SECRET_KEY: str = "super_secret_dev_key" # Should be overridden by env

    DATABASE_URL: str = "sqlite:///./quantum_healthcare.db"

    OPENAI_API_KEY: Optional[str] = None
    GEMINI_API_KEY: Optional[str] = None
    UMLS_API_KEY: Optional[str] = None
    BIOPORTAL_API_KEY: Optional[str] = None

    LOG_LEVEL: str = "INFO"

    class Config:
        env_file = ".env"
        env_file_encoding = 'utf-8'
        extra = "ignore" # Ignore extra fields from .env

settings = Settings()