"""split channels into two verticals: real_estate / hr

Existing rows get `real_estate` per the migration decision — the service was
real-estate-only before this column existed.

Revision ID: 0007
Revises: 0006
Create Date: 2026-05-19

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0007"
down_revision: Union[str, None] = "0006"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "channels",
        sa.Column(
            "vertical",
            sa.String(length=32),
            nullable=False,
            server_default="real_estate",
        ),
    )
    op.create_index("ix_channels_vertical", "channels", ["vertical"])


def downgrade() -> None:
    op.drop_index("ix_channels_vertical", table_name="channels")
    op.drop_column("channels", "vertical")