from sqlalchemy import Column, Integer, String, DateTime
from datetime import datetime
from app.models.base import Base

class User(Base):
    __tablename__ = "users"
    
    user_id = Column(Integer, primary_key=True, index=True)
    username = Column(String, unique=True, index=True)
    hashed_password = Column(String)
    role = Column(String, default="user")  # admin 或 user
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    def __repr__(self):
        return f"<User(user_id={self.user_id}, username='{self.username}', role='{self.role}')>"