from __future__ import annotations

from sqlalchemy.engine import Connection, Engine

from app.db.base import Base

MIGRATION_OWNED_TABLES: frozenset[str] = frozenset(
    {
        "auth_sessions",
        "ai_application_preview_decisions",
        "ai_decisions",
        "ai_decision_feedback",
        "expense_cases",
        "expense_case_links",
        "business_events",
        "memory_entries",
        "memory_evidence_links",
        "workflow_outcomes",
    }
)


def create_legacy_schema(bind: Engine | Connection) -> None:
    """创建仍由旧 bootstrap 管理的表，不越过 Alembic 的表所有权边界。"""
    legacy_tables = [
        table for table in Base.metadata.sorted_tables if table.name not in MIGRATION_OWNED_TABLES
    ]
    Base.metadata.create_all(bind=bind, tables=legacy_tables)