from typing import  Dict
from PIL import Image
import numpy as np
import os
import json
import tensorflow as tf
from tensorflow import keras

class PreTrainedPipeline():
    def __init__(self, path=""):
        self.model = keras.saving.load_model("./")
        with open(os.path.join(path, "config.json")) as config:
            config = json.load(config)
        self.id2label = config["id2label"]

    def __call__(self, inputs: "Image.Image")-> Dict[str, str]:
        """
        Args:
            inputs (:obj:`PIL.Image`):
                The raw image representation as PIL.
                No transformation made whatsoever from the input. Make all necessary transformations here.
        Return:
            A :obj:`list`:. The list contains items that are dicts should be liked {"label": "XXX", "score": 0.82}
                It is preferred if the returned list is in decreasing `score` order
        """
        img = keras.preprocessing.image.load_img(input, target_size=(224, 224))
        x = keras.preprocessing.image.img_to_array(img)
        x = np.expand_dims(x, axis=0)
        x = keras.applications.vgg16.preprocess_input(x)
        prediction = self.model.predict(x)
        return { 'label': "detected", 'score': "dragon" if prediction[0][0] >= 0.99 else "not-dragon" }