"""Add inventory_scope to ansible_runs; make inventory_path nullable; backfill scope

Revision ID: 0017_ansible_run_scope
Revises: 0016_ansible_inventory_groups
Create Date: 2026-06-05
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0017_ansible_run_scope"
down_revision: Union[str, None] = "0016_ansible_inventory_groups"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "ansible_runs",
        sa.Column("inventory_scope", sa.String(255), nullable=True),
    )
    # Backfill: existing rows used repo inventory files — reconstruct the legacy scope string.
    op.execute(
        """
        UPDATE ansible_runs
        SET inventory_scope = 'repo:' || source_name || ':' || inventory_path
        WHERE inventory_path IS NOT NULL AND inventory_path != ''
        """
    )
    # Rows with empty inventory_path get 'steward:all'
    op.execute(
        "UPDATE ansible_runs SET inventory_scope = 'steward:all' WHERE inventory_scope IS NULL"
    )
    op.alter_column("ansible_runs", "inventory_scope", nullable=False)
    # Make inventory_path nullable — new steward:* runs won't have a file path.
    op.alter_column("ansible_runs", "inventory_path", nullable=True)


def downgrade() -> None:
    op.drop_column("ansible_runs", "inventory_scope")
    op.alter_column("ansible_runs", "inventory_path", nullable=False)