from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "005_add_car_seen_sold_timestamps"
down_revision: Union[str, None] = "004_add_ingestion_tables"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "MOBILEDE_cars",
        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.add_column(
        "MOBILEDE_cars",
        sa.Column("sold_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.execute('UPDATE "MOBILEDE_cars" SET first_seen_at = last_seen_at WHERE first_seen_at IS NULL')
    op.alter_column("MOBILEDE_cars", "first_seen_at", nullable=False)
    op.create_index("ix_MOBILEDE_cars_first_seen_at", "MOBILEDE_cars", ["first_seen_at"])
    op.create_index("ix_MOBILEDE_cars_sold_at", "MOBILEDE_cars", ["sold_at"])


def downgrade() -> None:
    op.drop_index("ix_MOBILEDE_cars_sold_at", table_name="MOBILEDE_cars")
    op.drop_index("ix_MOBILEDE_cars_first_seen_at", table_name="MOBILEDE_cars")
    op.drop_column("MOBILEDE_cars", "sold_at")
    op.drop_column("MOBILEDE_cars", "first_seen_at")