import json
from typing import Dict, List, Any
from FlagEmbedding import BGEM3FlagModel

class EndpointHandler():
    def __init__(self, path=""):
        self.model = BGEM3FlagModel(path, use_fp16=True) # Setting use_fp16 to True speeds up computation with a slight performance degradation

        # Preload all the elements you are going to need at inference.
        # pseudo:
        # self.model= load_model(path)

    def __call__(self, data: Dict[str, Any]) -> List[Dict[str, Any]]:
        """
        Args:
            data (:obj:):
                includes the input data and the parameters for the inference.
        Return:
            A :obj:`list`:. The object returned should be a list of vector
        """
        inputs = data.pop("inputs", data)
        parameters = data.pop("parameters", None)

        # pass inputs with all kwargs in data
        if parameters is not None:
            embeddings = self.model.encode(inputs, **parameters)['dense_vecs']
        else:
            embeddings = self.model.encode(inputs)['dense_vecs']
        # postprocess the prediction
        list_of_lists = [arr.tolist() for arr in embeddings]
        return json.dumps(list_of_lists)

        # return self.model.encode(inputs, batch_size=12, max_length=8192)['dense_vecs']