"""用户拉黑模型"""

from datetime import datetime

from sqlalchemy import String, DateTime, ForeignKey, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class UserBlock(Base):
    __tablename__ = "user_blocks"
    __table_args__ = (
        UniqueConstraint("blocker_id", "blocked_id", name="uq_user_block"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True)
    blocker_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
    blocked_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
    created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())

    blocker = relationship("User", foreign_keys=[blocker_id])
    blocked = relationship("User", foreign_keys=[blocked_id])