from typing import Type, Optional, List
import logging

from pydantic import BaseModel, Field

from elasticsearch import Elasticsearch

from langchain.callbacks.manager import AsyncCallbackManagerForToolRun
from langchain.tools.base import BaseTool

from ask_candid.base.config.connections import SEMANTIC_ELASTIC_QA

logging.basicConfig(level="INFO")
logger = logging.getLogger("elasticsearch_playground")
es = Elasticsearch(
    cloud_id=SEMANTIC_ELASTIC_QA.cloud_id,
    api_key=SEMANTIC_ELASTIC_QA.api_key,
    verify_certs=True,
    request_timeout=60 * 3
)


class ListIndicesInput(BaseModel):
    """Input for the list indices tool."""

    separator: str = Field(..., description="Separator for the list of indices")


class ListIndicesTool(BaseTool):
    """Tool for getting all ElasticSearch indices."""

    name: str = "elastic_list_indices"  # Added type annotation
    description: str = (
        "Input is a delimiter like comma or new line. Output is a separated list of indices in the database. "
        "Always use this tool to get to know the indices in the ElasticSearch cluster."
    )
    args_schema: Optional[Type[BaseModel]] = (
        ListIndicesInput  # Define this before methods
    )

    def _run(self, separator: str) -> str:
        """Get all indices in the Elasticsearch server, usually separated by a line break."""
        try:
            # Ensure that `es` is correctly initialized before calling this method
            indices: List[str] = es.cat.indices(h="index", s="index").split()
            # Filter out hidden indices starting with a dot
            return separator.join(
                [index for index in indices if not index.startswith(".")]
            )
        except Exception as e:
            logger.exception("Could not list indices: %s", e)
            return ""

    async def _arun(
        self,
        separator: str = "",
        run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
    ) -> str:
        raise NotImplementedError("ListIndicesTool does not support async operations")