"""Добавление ai_hint в questions.

Revision ID: 0003_question_ai_hint
Revises: 0002_tests_hints_result_mode
Create Date: 2026-04-29

Колонка опциональная (TEXT NULL), как в ORM Question.ai_hint.
"""
from __future__ import annotations

from typing import Sequence, Union

from alembic import op

revision: str = "0003_question_ai_hint"
down_revision: Union[str, None] = "0002_tests_hints_result_mode"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.execute(
        """
        ALTER TABLE questions
          ADD COLUMN IF NOT EXISTS ai_hint TEXT NULL;
        """
    )


def downgrade() -> None:
    op.execute(
        """
        ALTER TABLE questions DROP COLUMN IF EXISTS ai_hint;
        """
    )