"""
会话模型
"""
from datetime import datetime
from app.utils.timezone import beijing_now_naive
from sqlalchemy import Column, Integer, String, DateTime, Boolean
from app.database import Base


class Session(Base):
    """会话表"""
    __tablename__ = "sessions"
    
    id = Column(Integer, primary_key=True, autoincrement=True, comment="主键ID")
    session_id = Column(String(64), unique=True, nullable=False, comment="会话ID(UUID)")
    user_id = Column(Integer, nullable=False, comment="用户ID")
    machine_code = Column(String(255), nullable=False, comment="机器码")
    is_active = Column(Boolean, default=True, comment="是否激活")
    expires_at = Column(DateTime, nullable=False, comment="过期时间")
    created_at = Column(DateTime, default=beijing_now_naive, comment="创建时间")
    updated_at = Column(DateTime, default=beijing_now_naive, onupdate=beijing_now_naive, comment="更新时间")
    
    def __repr__(self):
        return f"<Session(id={self.id}, session_id='{self.session_id}', user_id={self.user_id})>"