import logging
from typing import Union, List

from elasticsearch import Elasticsearch
# import elasticsearch.helpers # type: ignore

from towhee.operator import PyOperator, SharedType # type: ignore


logger = logging.getLogger()


class ESSearch(PyOperator):
    """
    Search using ElasticSearch with client ready

    Args:
        host (`str`): host to connect ElasticSearch client
        port (`int`): port to connect ElasticSearch client
        user (`str=None`): user name to connect ElasticSearch client, defaults to None
        password (`str=None`): user password to connect ElasticSearch client, defaults to None
        ca_certs (`str=None`): path to CA certificate, defaults to None
    """
    def __init__(self, **connection_kwargs):
        super().__init__()
        try:
            if 'port' in connection_kwargs:
                assert 'host' in connection_kwargs, 'Missing port in connection kwargs but given port only.'
                connection_kwargs['hosts'] = [f'https://{host}:{port}']
            self.client = Elasticsearch(**connection_kwargs)
            logger.info('Successfully connected to ElasticSearch client.')
        except Exception as e:
            logger.error('Failed to connect ElasticSearch client:\n', e)
            raise e

    def __call__(self, index_name: str, query: dict = {'match_all': {}}):
        if not query:
            return ''
        resp = self.client.search(index=index_name, query=query)
        return resp

    @property
    def shared_type(self):
        return SharedType.NotShareable