from sqlalchemy import Column, Integer, String, DateTime, Boolean, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from datetime import datetime
from ..database import Base

class Token(Base):
    __tablename__ = "tokens"
    
    id = Column(Integer, primary_key=True, index=True)
    
    # Token信息
    token = Column(String(500), nullable=False, index=True)
    token_type = Column(String(50), nullable=False)  # access, refresh, verify, reset
    expires_at = Column(DateTime, nullable=False)
    is_revoked = Column(Boolean, default=False)
    
    # 用户关联
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    user = relationship("User", back_populates="tokens")
    
    # 额外信息
    ip_address = Column(String(45), nullable=True)
    user_agent = Column(String(500), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    
    def is_expired(self):
        return datetime.utcnow() > self.expires_at
    
    def __repr__(self):
        return f"<Token {self.token_type} for user {self.user_id}>"