import json
from typing import Any

from django.conf import settings

from apps.utils.tools import MyJSONEncoder


def json_safe_result(value: Any) -> Any:
    return json.loads(json.dumps(value, cls=MyJSONEncoder, ensure_ascii=False))


def validate_result_size(value: Any) -> None:
    encoded = json.dumps(value, ensure_ascii=False, separators=(",", ":")).encode()
    if len(encoded) > settings.MCP_MAX_RESULT_BYTES:
        raise RuntimeError(
            "工具结果超过 MCP 响应上限，请缩小查询范围或增加筛选参数"
        )