from typing import Dict, List, Any
from PIL import Image
from io import BytesIO
from transformers import pipeline
import base64


class EndpointHandler():
    def __init__(self, path=""):
        self.pipeline=pipeline("zero-shot-image-classification",model=path)
    
    def __call__(self, data: Dict[str, Any]) -> List[Dict[str, Any]]:
        """
       data args:
            parameters: {
                candidate_labels: List[str]
            }
            inputs: str
      Return:
            A :obj:`list`:. The list contains items that are dicts should be liked {"label": "XXX", "score": 0.82}
        """
        parameters = data.get("parameters", {})
        inputs = data.get("inputs", "")

        # decode base64 image to PIL
        image = Image.open(BytesIO(base64.b64decode(inputs)))

        # run prediction one image wit provided candiates
        prediction = self.pipeline(images=[image], candidate_labels=parameters.get("candidate_labels", []))
        return prediction[0]