"""add token_version to users

Revision ID: 943dbd74d983
Revises: 861e76aaf34c
Create Date: 2026-07-27

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '943dbd74d983'
down_revision: Union[str, Sequence[str], None] = '861e76aaf34c'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Upgrade schema."""
    # server_default backfills every existing user to 0 (their current sessions
    # stay valid, since 0 also matches what already-issued tokens carry
    # implicitly — see the "sub"-only tokens issued before this migration);
    # dropped right after so new rows go through the ORM default instead of a
    # stale constant.
    op.add_column(
        'users', sa.Column('token_version', sa.Integer(), nullable=False, server_default='0')
    )
    with op.batch_alter_table('users') as batch_op:
        batch_op.alter_column('token_version', server_default=None)
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_column('users', 'token_version')
    # ### end Alembic commands ###