# -*- coding: utf-8 -*-
from datetime import datetime
from sqlalchemy import Column, Integer, String, Text, DateTime

from backend.database import Base


class Question(Base):
    __tablename__ = "questions"
    id = Column(Integer, primary_key=True, index=True)
    content = Column(Text, nullable=False)
    option_a = Column(String(255), nullable=False)
    option_b = Column(String(255), nullable=False)
    option_c = Column(String(255), nullable=False)
    option_d = Column(String(255), nullable=False)
    correct_option = Column(String(1), nullable=False)
    knowledge_point = Column(String(100), nullable=True)
    difficulty = Column(Integer, default=1)
    created_at = Column(DateTime, default=datetime.utcnow)