from sqlalchemy import Column, String, Boolean, DateTime, ForeignKey
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
import uuid

from app.database import Base


class RefreshToken(Base):
    __tablename__ = "refresh_tokens"
    
    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id = Column(
        UUID(as_uuid=True), 
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False, 
        index=True
    )
    
    token = Column(String(500), unique=True, nullable=False, index=True)
    expires_at = Column(DateTime, nullable=False)
    is_revoked = Column(Boolean, default=False)
    
    created_at = Column(DateTime, server_default=func.now())
    
    # Relationship
    user = relationship("User", back_populates="refresh_tokens")
    
    def __repr__(self):
        return f"<RefreshToken user_id={self.user_id}>"