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

class UserImage(Base):
    """用户个人形象库模型"""
    __tablename__ = "user_images"
    
    id = Column(Integer, primary_key=True, autoincrement=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True, comment="用户ID")
    image_url = Column(String(500), nullable=False, comment="图片URL")
    is_default = Column(Boolean, default=False, nullable=False, comment="是否为默认形象")
    create_time = Column(DateTime, default=func.now(), comment="创建时间")
    
    # 关系
    user = relationship("User", back_populates="images")
    
    def __repr__(self):
        return f"<UserImage(id={self.id}, user_id={self.user_id})>"