"""add rulebook_chunks (pgvector RAG)

Revision ID: 7c3f9a2e1d44
Revises: 48846ed4fe0e
Create Date: 2026-08-31 19:00:00.000000

"""
from typing import Sequence, Union

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

# revision identifiers, used by Alembic.
revision: str = '7c3f9a2e1d44'
down_revision: Union[str, None] = '48846ed4fe0e'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.execute("CREATE EXTENSION IF NOT EXISTS vector")

    op.create_table(
        'rulebook_chunks',
        sa.Column('id', sa.UUID(), nullable=False),
        sa.Column('source_document', sa.String(length=200), nullable=False),
        sa.Column('chunk_index', sa.Integer(), nullable=False),
        sa.Column('content', sa.Text(), nullable=False),
        sa.Column('embedding', Vector(384), nullable=False),
        sa.Column('doc_metadata', postgresql.JSONB(astext_type=sa.Text()), nullable=False),
        sa.PrimaryKeyConstraint('id'),
    )
    op.create_index(
        op.f('ix_rulebook_chunks_source_document'), 'rulebook_chunks', ['source_document'], unique=False
    )


def downgrade() -> None:
    op.drop_index(op.f('ix_rulebook_chunks_source_document'), table_name='rulebook_chunks')
    op.drop_table('rulebook_chunks')
    op.execute("DROP EXTENSION IF EXISTS vector")