"""Add performance indexes for growing database

Revision ID: 002_add_indexes
Revises: 001_initial
Create Date: 2026-04-09
"""
from typing import Sequence, Union

from alembic import op

revision: str = "002_add_indexes"
down_revision: Union[str, None] = "001_initial"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # cars: ускорение фильтрации по бренду в API и статистике
    op.create_index("ix_cars_brand", "cars", ["brand"])

    # cars: составной индекс бренд+модель для комбинированных фильтров
    op.create_index("ix_cars_brand_model", "cars", ["brand", "model"])

    # cars: ускорение фильтрации по году (year_min/year_max)
    op.create_index("ix_cars_year", "cars", ["year"])

    # cars: ускорение фильтрации по статусу продажи
    op.create_index("ix_cars_is_sold", "cars", ["is_sold"])

    # cars: ускорение сортировки ORDER BY last_seen_at DESC (пагинация)
    op.create_index("ix_cars_last_seen_at", "cars", ["last_seen_at"])

    # images: ускорение JOIN/DELETE по car_id (критично при upsert)
    op.create_index("ix_images_car_id", "images", ["car_id"])

    # sync_runs: ускорение поиска stale runs по статусу
    op.create_index("ix_sync_runs_status", "sync_runs", ["status"])


def downgrade() -> None:
    op.drop_index("ix_sync_runs_status", table_name="sync_runs")
    op.drop_index("ix_images_car_id", table_name="images")
    op.drop_index("ix_cars_last_seen_at", table_name="cars")
    op.drop_index("ix_cars_is_sold", table_name="cars")
    op.drop_index("ix_cars_year", table_name="cars")
    op.drop_index("ix_cars_brand_model", table_name="cars")
    op.drop_index("ix_cars_brand", table_name="cars")