from datetime import datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class Notification(Base):
    __tablename__ = "notifications"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    type: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
    title: Mapped[str] = mapped_column(String(200), nullable=False)
    content: Mapped[str | None] = mapped_column(Text)
    ref_type: Mapped[str | None] = mapped_column(String(50))
    ref_id: Mapped[int | None] = mapped_column(Integer)
    is_read: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    user = relationship("User", lazy="selectin")

    def __repr__(self) -> str:
        return f"<Notification {self.id} user={self.user_id} type={self.type}>"