"""场外基金专用 NL2SQL 适配器。

该适配器只隔离调用边界，不改写 `nl2sql_yc.query_dict` 的业务能力。
"""

from importlib import import_module
from typing import cast

from app.core.contracts import RequestContext


class OffsiteNl2SqlAdapter:
    """把场外基金上下文转换为 `nl2sql_yc.query_dict` 可接受的稳定参数。"""

    script_path = "nl2sql_yc.py"

    def query(self, question: str, context: RequestContext) -> dict[str, object]:
        try:
            query_dict = getattr(import_module("nl2sql_yc"), "query_dict", None)
            if not callable(query_dict):
                return {"status": "error", "message": "NL2SQL入口query_dict不存在"}
            result = cast(dict[str, object], query_dict(
                question,
                self._auth_context(context),
                use_llm=False,
                persist_audit=False,
            ))
            if isinstance(result, dict):
                return result
            return {"status": "error", "message": "NL2SQL返回格式不正确"}
        except Exception as exc:
            return {"status": "error", "message": f"NL2SQL调用失败：{type(exc).__name__}"}

    @staticmethod
    def _auth_context(context: RequestContext) -> dict[str, object]:
        return {
            "user_id": int(context.user_id) if context.user_id.isdigit() else None,
            "roles": list(context.roles),
            "allowed_domains": ["market_nav", "trading_account", "product_fee"],
            "customer_scope": context.data_scope if context.data_scope in {
                "self", "own_customers", "all",
            } else "all",
            "max_rows": 100,
            "max_query_seconds": 10,
        }