"""Settings model — singleton row for app-wide configuration."""

from datetime import datetime, timezone

from sqlalchemy import Integer, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.db import Base


class Settings(Base):
    """
    Singleton settings row (id=1).

    Stores the hashed password and app-level config.
    password_hash is NULL until first-run setup.
    """

    __tablename__ = "settings"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, default=1)
    password_hash: Mapped[str | None] = mapped_column(Text, nullable=True, default=None)
    created_at: Mapped[str] = mapped_column(
        Text,
        default=lambda: datetime.now(timezone.utc).isoformat(),
    )
    updated_at: Mapped[str] = mapped_column(
        Text,
        default=lambda: datetime.now(timezone.utc).isoformat(),
        onupdate=lambda: datetime.now(timezone.utc).isoformat(),
    )