"""add content_guidelines column to worlds table

Revision ID: 0016_content_guidelines
Revises: 0015_add_discovery_metadata
Create Date: 2026-09-17 00:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision: str = "0016_content_guidelines"
down_revision: Union[str, None] = "0015_add_discovery_metadata"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Check if column already exists (in case partial run added column before version update failed)
    bind = op.get_bind()
    insp = sa.inspect(bind)
    cols = [c["name"] for c in insp.get_columns("worlds")]
    if "content_guidelines" not in cols:
        op.add_column("worlds", sa.Column("content_guidelines", sa.Text(), nullable=True))


def downgrade() -> None:
    op.drop_column("worlds", "content_guidelines")