"""add seen decision and price_at_decision

Revision ID: f7a8b9c0d1e2
Revises: d6e7f8a9b0c1
Create Date: 2026-05-16 00:00:00.000000

Adds support for the soft-hide "seen" decision type. The decision column is
already a free string, so no schema change is needed for the enum value; we
only need to add price_at_decision so the client can resurface listings
whose price has changed since the user marked them seen.
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'f7a8b9c0d1e2'
down_revision: Union[str, None] = 'd6e7f8a9b0c1'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        'listingdecision',
        sa.Column('price_at_decision', sa.Float(), nullable=True),
    )


def downgrade() -> None:
    op.drop_column('listingdecision', 'price_at_decision')