"""Notification SQLAlchemy model."""

from datetime import datetime
from typing import Any
import uuid

from sqlalchemy import DateTime, ForeignKey, JSON, String, Text
from sqlalchemy import Uuid as UUID
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.sql import func

from src.models.base import Base, UUIDPrimaryKeyMixin


class Notification(UUIDPrimaryKeyMixin, Base):
    __tablename__ = "notifications"

    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    category: Mapped[str] = mapped_column(String(32), nullable=False)
    severity: Mapped[str] = mapped_column(String(16), nullable=False)
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    message: Mapped[str | None] = mapped_column(Text, nullable=True)
    source_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    source_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), nullable=True
    )
    notification_metadata: Mapped[dict[str, Any]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    read_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True, index=True
    )
    dismissed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False, index=True
    )