"""Merge TestTemplate.detect_suggested_procedure into expected_detection.

Two overlapping fields on TestTemplate — expected_detection (narrative
guidance, populated by imports and leads since long before this feature)
and detect_suggested_procedure (concrete commands, populated only via the
procedure-suggestion approval workflow) — are consolidated into one:
expected_detection. Any existing detect_suggested_procedure text is
appended (not overwritten) onto expected_detection before the column is
dropped, so nothing already approved is lost.

Revision ID: b063
Revises: b062
Create Date: 2026-07-15
"""

import sqlalchemy as sa
from alembic import op

revision = "b063"
down_revision = "b062"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.execute(
        """
        UPDATE test_templates
        SET expected_detection = CASE
            WHEN expected_detection IS NULL OR expected_detection = '' THEN detect_suggested_procedure
            ELSE expected_detection || E'\n' || detect_suggested_procedure
        END
        WHERE detect_suggested_procedure IS NOT NULL AND detect_suggested_procedure != ''
        """
    )
    op.drop_column("test_templates", "detect_suggested_procedure")


def downgrade() -> None:
    op.add_column("test_templates", sa.Column("detect_suggested_procedure", sa.Text(), nullable=True))