from datetime import datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, String, func
from sqlalchemy.orm import Mapped, mapped_column

from app.core.database import Base


class RefreshToken(Base):
    """Server-side record of an issued refresh token, enabling revocation.

    The raw token is never stored — only its jti (for lookup) and a SHA-256
    hash (for verification). Rotation marks the old row revoked and inserts a
    new one; logout revokes the row(s) for a user.
    """

    __tablename__ = "refresh_tokens"

    id: Mapped[int] = mapped_column(primary_key=True)
    jti: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    token_hash: Mapped[str] = mapped_column(String(64))
    user_id: Mapped[int] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), index=True
    )
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    revoked: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now()
    )