backend/app/core/config.py

import os
from dotenv import load_dotenv

load_dotenv()

class Settings:
    PROJECT_NAME: str = "Autonomous Data Analyst Agent"
    GROQ_API_KEY: str = os.getenv("GROQ_API_KEY", "")
    DATABASE_URL: str = os.getenv("DATABASE_URL", "sqlite:///./test.db")
    
    def validate(self):
        """Validate that required settings are present"""
        if not self.GROQ_API_KEY:
            print("⚠️  WARNING: GROQ_API_KEY not set. Please add it to Hugging Face Spaces secrets.")
            print("    The app will start but queries will fail until the API key is configured.")

settings = Settings()
settings.validate()