from pydantic_settings import BaseSettings
from typing import Optional
import os
import warnings


class Settings(BaseSettings):
    """
    Application settings loaded from environment variables.
    """
    database_url: str = ""  # Making optional with empty default
    better_auth_secret: str = ""
    better_auth_url: str = "http://localhost:3000"
    api_host: str = "0.0.0.0"
    api_port: int = 7860
    debug: bool = False

    class Config:
        env_file = ".env" if os.path.exists(".env") else None
        env_file_encoding = 'utf-8'


settings = Settings()

# Check for missing critical settings
if not settings.database_url:
    warnings.warn("DATABASE_URL is not set. The app may not function properly without a database connection.")

if not settings.better_auth_secret:
    warnings.warn("BETTER_AUTH_SECRET is not set. Using default empty value. This is insecure for production.")

if settings.better_auth_url == "":
    settings.better_auth_url = "http://localhost:3000"  # Set default if empty