import gradio as gr
from huggingface_hub import from_pretrained_keras
from huggingface_hub import KerasModelHubMixin
import transformers
from transformers import AutoTokenizer
import numpy as np


m = from_pretrained_keras('sgonzalezsilot/FakeNews-Detection-Twitter-Thesis')

MODEL = "digitalepidemiologylab/covid-twitter-bert-v2"
tokenizer = AutoTokenizer.from_pretrained(MODEL)

def bert_encode(tokenizer,data,maximum_length) :
  input_ids = []
  attention_masks = []
  

  for i in range(len(data)):
      encoded = tokenizer.encode_plus(
        
        data[i],
        add_special_tokens=True,
        max_length=maximum_length,
        pad_to_max_length=True,
        truncation = True,
        return_attention_mask=True,
      )
      
      input_ids.append(encoded['input_ids'])
      attention_masks.append(encoded['attention_mask'])

  return np.array(input_ids),np.array(attention_masks)
    
# train_encodings = tokenizer(train_texts, truncation=True, padding=True)
# test_encodings = tokenizer(test_texts, truncation=True, padding=True)



    
def get_news(input_text):
  sentence_length = 110
  train_input_ids,train_attention_masks = bert_encode(tokenizer,[input_text],sentence_length)

  pred = m.predict([train_input_ids,train_attention_masks])
  pred = np.round(pred)
  pred = pred.flatten()

  if pred == 1:
      result = "Fake News"
  else:
      result = "True News"
  return result

tweet_input = gr.Textbox(label = "Enter the tweet")
output = gr.Textbox(label="Result")

descripcion = (
  """
  <center>
  Demo of the Covid-Twitter Fake News Detection System from my thesis.
  </center>
  """
)
iface = gr.Interface(fn = get_news, 
                     inputs = tweet_input, 
                     outputs = output,
                     title = 'Covid Fake News Detection System', 
                     description=descripcion,
                     examples=["CDC Recommends Mothers Stop Breastfeeding To Boost Vaccine Efficacy",
                               "An article claiming that Bill Gates' vaccine would modify human DNA.",
                               "In the first half of 2020 WHO coordinated the logistics &amp; shipped 😷More than 3M surgical masks 🧤More than 2M gloves 🧰More than 1M diagnostic kits 🥼More than 200K gowns 🛡️More than 100K face shields to 135 countries across the🌍🌎🌏. https://t.co/iz4YQkbSGM",
                               "Many COVID-19 treatments may be associated with adverse skin reactions and should be considered in a differential diagnosis new report says. https://t.co/GLSeYX2VDq"])
                     
iface.launch()