"""Notification model."""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import String, DateTime, ForeignKey, Text, func, Index
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class Notification(Base, TenantMixin):
    """User notification entity."""

    __tablename__ = "notifications"
    __table_args__ = (
        Index("ix_notifications_tenant_user_read", "tenant_id", "user_id", "read_at"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    user_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    type: Mapped[str] = mapped_column(String(20), nullable=False)
    title: Mapped[str] = mapped_column(String(200), nullable=False)
    body: Mapped[str | None] = mapped_column(Text, nullable=True)
    read_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )