"""ORM model for per-user UI preferences.

A single key-value (JSON) row per user, holding small UI-level toggles that
should follow the account across devices — e.g. whether to hide the
admin-configured prompt prefix in the chat input. Kept generic (one JSON blob)
so new toggles do not each require an ALTER TABLE.
"""

from __future__ import annotations

from datetime import UTC, datetime

from sqlalchemy import String
from sqlalchemy.orm import Mapped, mapped_column

from deerflow.persistence.base import Base
from deerflow.persistence.types import BeijingDateTime, PortableJSON


class UserPreferencesRow(Base):
    __tablename__ = "user_preferences"

    user_id: Mapped[str] = mapped_column(String(64), primary_key=True)
    preferences: Mapped[dict] = mapped_column(PortableJSON(), nullable=False, default=dict)
    created_at: Mapped[datetime] = mapped_column(BeijingDateTime(), nullable=False, default=lambda: datetime.now(UTC))
    updated_at: Mapped[datetime] = mapped_column(BeijingDateTime(), nullable=False, default=lambda: datetime.now(UTC), onupdate=lambda: datetime.now(UTC))