from datetime import datetime
from typing import Optional
from sqlalchemy import String, Text, Boolean, DateTime, Integer, ForeignKey, func
from sqlalchemy.orm import Mapped, mapped_column
from app.database import Base


class Notification(Base):
    __tablename__ = "notifications"
    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    body: Mapped[Optional[str]] = mapped_column(Text)
    link: Mapped[Optional[str]] = mapped_column(String(500))
    is_read: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())