import os
from datetime import timedelta

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-key-change-in-production'
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'sqlite:///flask_files.db'
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    
    # File storage settings
    UPLOAD_FOLDER = os.environ.get('UPLOAD_FOLDER') or os.path.join(os.getcwd(), 'uploads')
    MAX_CONTENT_LENGTH = 8000 * 1024 * 1024  # 8GB limit
    
    # Session settings
    PERMANENT_SESSION_LIFETIME = timedelta(days=7)
    
    # Make sure upload folder exists
    @staticmethod
    def init_app(app):
        os.makedirs(Config.UPLOAD_FOLDER, exist_ok=True)