"""traceability and manual input become rules of the recipe

Three settings that were nowhere: whether the lot and the serial are compulsory,
and whether a value may be typed instead of read from the caliper. Until now lot
and serial were optional everywhere and the keypad was always available, so a
value that happens to be in tolerance could simply be entered by hand.

Backfill: the two traceability flags start false, which is exactly today's
behaviour. Manual input starts *true* on the recipes that already exist - the
column default is false, so recipes written from now on are caliper-only, but
flipping the ones already in use would stop a running line at the next
measurement. Turning them off is a decision for whoever owns the recipe, taken in
the editor, not a side effect of an upgrade.

Revision ID: 009_recipe_rules
Revises: 008_loop_events
Create Date: 2026-07-28

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = '009_recipe_rules'
down_revision: Union[str, None] = '008_loop_events'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        'recipes',
        sa.Column(
            'requires_lot', sa.Boolean(), nullable=False, server_default='0',
        ),
    )
    op.add_column(
        'recipes',
        sa.Column(
            'requires_serial', sa.Boolean(), nullable=False, server_default='0',
        ),
    )
    op.add_column(
        'recipes',
        sa.Column(
            'allow_manual_input', sa.Boolean(), nullable=False, server_default='0',
        ),
    )
    # Recipes already in production keep the behaviour they were written under.
    op.execute("UPDATE recipes SET allow_manual_input = 1")


def downgrade() -> None:
    op.drop_column('recipes', 'allow_manual_input')
    op.drop_column('recipes', 'requires_serial')
    op.drop_column('recipes', 'requires_lot')