"""add deleted_at to files

Revision ID: c1d2e3f4a5b6
Revises: b9c0d1e2f3a4
Create Date: 2026-03-20 09:35:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'c1d2e3f4a5b6'
down_revision: Union[str, None] = 'b9c0d1e2f3a4'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Use raw SQL with IF NOT EXISTS to handle environments where the column
    # was added manually outside of migrations (e.g. local dev databases)
    op.execute("ALTER TABLE files ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMP WITHOUT TIME ZONE")


def downgrade() -> None:
    op.drop_column('files', 'deleted_at')