import sys
from typing import NamedTuple, List
from pathlib import Path
import numpy

from towhee.operator import Operator


class EmbeddingConcat(Operator):
    """

    """

    def __init__(self, w1: float, w2: float) -> None:
        super().__init__()
        if w1 is not None:
            self.w1 = w1
        else:
            self.w1 = 1.0
        if w2 is not None:
            self.w2 = w2
        else:
            self.w2 = 1.0
        sys.path.append(str(Path(__file__).parent))

    def __call__(self, emb1: numpy.ndarray, emb2: numpy.ndarray) -> NamedTuple('Outputs', [('feature_vector', numpy.ndarray)]):
        concatemb = []
        concatemb.append(self.w1 * emb1)
        concatemb.append(self.w2 * emb2)
        concated_feature = numpy.hstack(concatemb).flatten()
        Outputs = NamedTuple('Outputs', [('feature_vector', numpy.ndarray)])
        return Outputs(concated_feature)