import gradio as gr
# import pickle
# import numpy as np
# from fastapi import FastAPI,Response
# from sklearn.metrics import accuracy_score, f1_score
# import prometheus_client as prom
# import pandas as pd
# import uvicorn
from transformers import VisionEncoderDecoderModel,pipeline, ViTImageProcessor, AutoTokenizer
import torch


#model

# loaded_model = pickle.load(open(save_file_name, 'rb'))

# app=FastAPI()


# test_data=pd.read_csv("test.csv")


# f1_metric = prom.Gauge('death_f1_score', 'F1 score for test samples')

# Function for updating metrics
# def update_metrics():
#     test = test_data.sample(20)
#     X = test.iloc[:, :-1].values
#     y = test['DEATH_EVENT'].values
    
#     # test_text = test['Text'].values
#     test_pred = loaded_model.predict(X)
#     #pred_labels = [int(pred['label'].split("_")[1]) for pred in test_pred]

#     f1 = f1_score( y , test_pred).round(3)

#     #f1 = f1_score(test['labels'], pred_labels).round(3)

#     f1_metric.set(f1)

feature_extractor = ViTImageProcessor.from_pretrained("model")

cap_model = VisionEncoderDecoderModel.from_pretrained("model")

tokenizer = AutoTokenizer.from_pretrained("model")
print("tokenizer --",tokenizer)

device = "cuda" if torch.cuda.is_available() else "cpu"

cap_model.to(device)

def generate_caption(processor, model, image, tokenizer=None):
  # max_length = 16
  # num_beams = 4
  # gen_kwargs = {"max_length": max_length, "num_beams": num_beams}

  # pixel_values = feature_extractor(images=image, return_tensors="pt").pixel_values
  # pixel_values = pixel_values.to(device)

  # output_ids = model.generate(pixel_values, **gen_kwargs)

  # preds = tokenizer.batch_decode(output_ids, skip_special_tokens=True)
  # preds = [pred.strip() for pred in preds]
  # return preds
    inputs = processor(images=image, return_tensors="pt").to(device)
    print("inputs",inputs)
    
    generated_ids = model.generate(pixel_values=inputs.pixel_values)
    print("generated_ids",generated_ids)

    if tokenizer is not None:
        print("tokenizer not null--",tokenizer)
        generated_caption = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]
    else:
        print("tokenizer null--",tokenizer)
        generated_caption = processor.batch_decode(generated_ids, skip_special_tokens=True)[0]
   
    return generated_caption

def predict_event(image):
    


    caption_vitgpt = generate_caption(feature_extractor, cap_model, image, tokenizer)

    return caption_vitgpt




# @app.get("/metrics")
# async def get_metrics():
#     update_metrics()
#     return Response(media_type="text/plain", content= prom.generate_latest())



title = "capstone"
description = "final capstone"

out_response = gr.outputs.Textbox(label="Caption generated by ViT+GPT-2")

iface = gr.Interface(fn=predict_event, 
                         inputs=gr.inputs.Image(type="pil"),
                         outputs=out_response,
                         enable_queue=True)
    


# app = gr.mount_gradio_app(app, iface, path="/")

iface.launch(server_name = "0.0.0.0", server_port = 8001)

# if __name__ == "__main__":
    # Use this for debugging purposes only
 
    # uvicorn.run(app, host="0.0.0.0", port=8001)