import numpy as np
import tensorflow as tf
import gradio as gr
from huggingface_hub import from_pretrained_keras
import cv2
# import matplotlib.pyplot as plt


model = from_pretrained_keras("keras-io/learning_to_tokenize_in_ViT")

# functions for inference                   
IMG_SIZE = 32

class_names = [
    "Airplane",
    "Automobile",
    "Bird",
    "Cat",
    "Deer",
    "Dog",
    "Frog",
    "Horse",
    "Ship",
    "Truck",
]

# resize the image and it to a float between 0,1
def preprocess_image(image, label):
    image = tf.image.resize(image, (IMG_SIZE, IMG_SIZE))
    return image, label


def read_image(image):
    image = tf.convert_to_tensor(image)
    image.set_shape([None, None, 3])
    print('$$$$$$$$$$$$$$$$$$$$$ in read image $$$$$$$$$$$$$$$$$$$$$$')
    print(image.shape)
#     plt.imshow(image)
#     plt.show()
    # image = tf.image.resize(images=image, size=[IMG_SIZE, IMG_SIZE])
    # image = image / 127.5 - 1
    image, _ = preprocess_image(image, 1) #  1 here is a temporary label
    return image

def infer(input_image):
    print('#$$$$$$$$$$$$$$$$$$$$$$$$$ IN INFER $$$$$$$$$$$$$$$$$$$$$$$')
    image_tensor = read_image(input_image)
    print(image_tensor.shape)
    predictions = model.predict(np.expand_dims((image_tensor), axis=0))
    predictions = np.squeeze(predictions).astype(float)

    return dict(zip(class_names, predictions))
    
    
# get the inputs
input = gr.inputs.Image(shape=(IMG_SIZE, IMG_SIZE))
# the app outputs two segmented images
output = [gr.outputs.Label()]
# it's good practice to pass examples, description and a title to guide users
examples = [["./content/examples/Frog.jpg"], ["./content/examples/Truck.jpg"], ["./content/examples/car.jpg"]] 
title = "Image Classification using a Mini ViT model with Token Learner"
description = "Upload an image or select from examples to classify it. This is a <b>mini ViT model with Token Learner module</b> trained on <b>CIFAR-10</b>. The allowed classes are - Airplane, Automobile, Bird, Cat, Deer, Dog, Frog, Horse, Ship, Truck <p><b>Space author: Harshavardhan</b> <br><b> Keras example authors: <a href=\"https://twitter.com/ariG23498\"> Aritra Roy Gosthipaty </a>, <a href=\"https://twitter.com/RisingSayak\"> Sayak Paul </a> </b> <br> <a href=\"https://keras.io/examples/vision/convmixer/\">link to the original Keras example</a> <br> Note: please note that the test accuracy of this model is only ~55%, so, you will see a lot of errors in prediction </p>   "

gr_interface = gr.Interface(infer, input, output, examples=examples, allow_flagging=False, analytics_enabled=False, title=title, description=description).launch(enable_queue=True, debug=False)
gr_interface.launch()