import uuid
from sqlalchemy import Column, String, DateTime, ForeignKey
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.core.database import Base


class Mention(Base):
    __tablename__ = "pjctrl_mentions"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    comment_id = Column(String(36), ForeignKey("pjctrl_comments.id", ondelete="CASCADE"), nullable=False)
    mentioned_user_id = Column(String(36), ForeignKey("pjctrl_users.id"), nullable=False)
    created_at = Column(DateTime, server_default=func.now(), nullable=False)

    # Relationships
    comment = relationship("Comment", back_populates="mentions")
    mentioned_user = relationship("User", back_populates="mentions")