import streamlit as st
from PIL import Image
import spacy
import streamlit as st
from streamlit_pdf_viewer import pdf_viewer



st.set_page_config(page_title="FACTOID: FACtual enTailment fOr hallucInation Detection", layout="wide")
st.title('Welcome to :blue[FACTOID] ') 

st.header('FACTOID: FACtual enTailment fOr hallucInation Detection :blue[Web Demo]')
#image = Image.open('image.png')
#st.image(image, caption='Traditional Entailment vs Factual Entailment')
pdf_viewer(input="fac.pdf", width=700)

# List of sentences
sentence1 = [f"U.S. President Barack Obama declared that the U.S. will refrain from deploying troops in Ukraine."]
sentence2 = [f"Joe Biden said we’d not send U.S. troops to fight Russian troops in Ukraine, but we would provide robust military assistance and try to unify the Western world against Russia’s aggression."]
# Create a dropdown menu
selected_sentence1 = st.selectbox("Select first sentence:", sentence1)
selected_sentence2 = st.selectbox("Select first sentence:", sentence2)

from transformers import AutoTokenizer, AutoModelForSequenceClassification
import torch
device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")

model_name = "MoritzLaurer/mDeBERTa-v3-base-xnli-multilingual-nli-2mil7"
tokenizer = AutoTokenizer.from_pretrained(model_name,use_fast=False)
model = AutoModelForSequenceClassification.from_pretrained(model_name)


premise = selected_sentence1
hypothesis = selected_sentence2
input = tokenizer(premise, hypothesis, truncation=True, return_tensors="pt")
output = model(input["input_ids"].to(device))  # device = "cuda:0" or "cpu"
prediction = torch.softmax(output["logits"][0], -1).tolist()
label_names = ["support", "neutral", "refute"]
prediction = {name: float(pred) for pred, name in zip(prediction, label_names)}
highest_label = max(prediction, key=prediction.get)


from transformers import pipeline
pipe = pipeline("text-classification",model="sileod/deberta-v3-base-tasksource-nli")
labels=pipe([dict(text=selected_sentence1,
  text_pair=selected_sentence2)])


import en_core_web_sm


def extract_person_names(sentence):
    nlp = spacy.load("en_core_web_sm")
    doc = nlp(sentence)
    person_names = [entity.text for entity in doc.ents if entity.label_ == 'PERSON']
    
    return person_names[0]

person_name1 = extract_person_names(selected_sentence1)
person_name2 = extract_person_names(selected_sentence2)


col1, col2 = st.columns(2)

with col1:
    st.write("Without Factual Entailment.")
    st.write("Textual Entailment Model:\n",highest_label)

with col2:
    st.write("With Factual Entailment:")
    st.write("Textual Entailment Model:\n",labels[0]['label'])
    st.write("Span Detection Model:\n")
    st.write(f"{person_name1}::{person_name2}")