"""add extracted JSONB column to messages

Revision ID: 0004
Revises: 0003
Create Date: 2026-05-05

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import postgresql

revision: str = "0004"
down_revision: Union[str, None] = "0003"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "messages",
        sa.Column("extracted", postgresql.JSONB(), nullable=True),
    )
    # GIN index for json queries (e.g. filter by extracted->'real_estate'->>'kind').
    op.execute(
        "CREATE INDEX IF NOT EXISTS ix_messages_extracted_gin "
        "ON messages USING GIN (extracted)"
    )


def downgrade() -> None:
    op.execute("DROP INDEX IF EXISTS ix_messages_extracted_gin")
    op.drop_column("messages", "extracted")