from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "006_runtime_storage"
down_revision: Union[str, None] = "005_add_details_fetched_at"
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_MOBILEDE_cars_active_last_seen_mobile_de" '
        'ON "MOBILEDE_cars" (last_seen_at) '
        "WHERE is_sold = FALSE AND origin_id LIKE 'mobile.de:%'"
    )
    op.add_column("MOBILEDE_cars", sa.Column("gallery_fetched_at", sa.DateTime(timezone=True), nullable=True))
    op.create_index("ix_MOBILEDE_cars_gallery_fetched_at", "MOBILEDE_cars", ["gallery_fetched_at"])
    op.execute(
        '''
        UPDATE "MOBILEDE_cars" AS car
        SET gallery_fetched_at = car.details_fetched_at
        WHERE car.details_fetched_at IS NOT NULL
          AND EXISTS (
              SELECT 1 FROM "MOBILEDE_images" AS image WHERE image.car_id = car.id
          )
        '''
    )


def downgrade() -> None:
    op.drop_index("ix_MOBILEDE_cars_gallery_fetched_at", table_name="MOBILEDE_cars")
    op.drop_column("MOBILEDE_cars", "gallery_fetched_at")
    op.execute('DROP INDEX IF EXISTS "ix_MOBILEDE_cars_active_last_seen_mobile_de"')