from langchain.tools import BaseTool
from langchain_community.utilities import WikipediaAPIWrapper
from pydantic import PrivateAttr

class WikiSearchTool(BaseTool):
    """
    Инструмент для поиска в English Wikipedia.
    """
    name: str = "wiki_search"
    description: str = "Search English Wikipedia articles by keyword/title and return summaries. Use for biographical details, dates, Featured Article look-ups, discographies, or any question answerable from an encyclopedia entry."
    _wrapper: WikipediaAPIWrapper = PrivateAttr()

    def __init__(self) -> None:
        super().__init__()
        self._wrapper = WikipediaAPIWrapper(lang="en")

    def _run(self, query: str) -> str:
        return self._wrapper.run(query)

    async def _arun(self, query: str) -> str:
        raise NotImplementedError("Async not supported.")