"""Add System-2 dynamic leverage.

subscriptions.sys2_leverage: per-user leverage for System-2 (bottom reversal),
independent of the Trump `leverage` field. NULL → platform default.

Revision ID: 011
Revises: 010
Create Date: 2026-05-18 00:00:00.000000
"""

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "011"
down_revision: Union[str, None] = "010"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    with op.batch_alter_table("subscriptions") as b:
        b.add_column(sa.Column("sys2_leverage", sa.Integer(), nullable=True))


def downgrade() -> None:
    with op.batch_alter_table("subscriptions") as b:
        b.drop_column("sys2_leverage")