"""Transfer-Regeln: optionales festes Zielkonto.

Erlaubt, einem Transfer-Schlagwort direkt ein Zielkonto zuzuweisen (z. B.
„REVOLUT" -> Konto Revolut). Ohne Zielkonto wird es weiterhin aus dem
Buchungstext erraten.

Revision ID: 0010
Revises: 0009
Create Date: 2026-08-20
"""
from alembic import op
import sqlalchemy as sa

revision = "0010"
down_revision = "0009"
branch_labels = None
depends_on = None


def upgrade() -> None:
    with op.batch_alter_table("categorization_rules") as batch:
        batch.add_column(sa.Column("target_account_id", sa.Integer(), nullable=True))
        batch.create_foreign_key(
            "fk_rule_target_account", "accounts", ["target_account_id"], ["id"], ondelete="SET NULL"
        )


def downgrade() -> None:
    with op.batch_alter_table("categorization_rules") as batch:
        batch.drop_constraint("fk_rule_target_account", type_="foreignkey")
        batch.drop_column("target_account_id")