import uuid
import logging
from towhee.operator import PyOperator
from pymilvus import connections, Collection


logger = logging.getLogger()


class MilvusClient(PyOperator):
    """
    Milvus ANN index class.
    """

    def __init__(self, host: str, port: int, collection_name: str):
        self._host = host
        self._port = port
        self._collection_name = collection_name
        self._connect_name = uuid.uuid4().hex
        connections.connect(alias=self._connect_name, host=self._host, port=self._port)
        self._collection = Collection(self._collection_name, using=self._connect_name)

    def __call__(self, *row):
        """
        Insert data to Milvus.

        Args:
        data (`list`):
            The data to insert into milvus.

        Returns:
            A MutationResult object contains `insert_count` represents how many and a `primary_keys` of primary keys.

        """
        mr = self._collection.insert(row)
        if mr.err_count > 0:
            raise RuntimeError("Insert to milvus failed")
        return None