"""add_technique_query_indexes

Add indexes on techniques table for common query patterns
(filter by tactic, filter by status_global) used in heatmap, scoring,
and list-all-techniques operations.

These may already exist if the ORM model auto-created them; the
``if_not_exists`` flag makes this migration safe to run regardless.

Revision ID: b026techidx
Revises: b025uqtdr
Create Date: 2026-02-18 18:00:00.000000

"""
from typing import Sequence, Union

from alembic import op

revision: str = "b026techidx"
down_revision: Union[str, None] = "b025uqtdr"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.execute(
        "CREATE INDEX IF NOT EXISTS ix_techniques_tactic "
        "ON techniques (tactic)"
    )
    op.execute(
        "CREATE INDEX IF NOT EXISTS ix_techniques_status_global "
        "ON techniques (status_global)"
    )


def downgrade() -> None:
    op.drop_index("ix_techniques_status_global", table_name="techniques")
    op.drop_index("ix_techniques_tactic", table_name="techniques")