import os
from datetime import timedelta

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'hard_to_guess_string_for_flask_app'
    SQLALCHEMY_DATABASE_URI = 'sqlite:///question_collector.db'
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SQLALCHEMY_ENGINE_OPTIONS = {
        'connect_args': {'check_same_thread': False}
    }

# 设置 UTC+8 时区
import pytz
tz = pytz.timezone('Asia/Shanghai')

def naive_now():
    from datetime import datetime
    return datetime.now(tz)

def utc_now():
    from datetime import datetime
    return datetime.utcnow()