import uuid
from datetime import datetime

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

from app.database import Base


class RefreshToken(Base):
    __tablename__ = "refresh_tokens"

    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(
        Uuid, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    # SHA-256 hash of the raw token (never store raw tokens)
    token_hash: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=False), nullable=False)
    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=False), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=False), nullable=False, server_default=func.now()
    )