import os
import logging

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'supersecretkey'
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'sqlite:///app.db'
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    # Logging configuration
    LOGGING_CONFIG = {
        'level': logging.INFO,
        'format': '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        'filename': 'app.log',
        'filemode': 'a'
    }