# Import packages:

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import re
# tensorflow imports:
import tensorflow as tf
from tensorflow import keras
from tensorflow.keras import losses
from tensorflow.keras import layers
from tensorflow.keras.layers.experimental import preprocessing
from tensorflow.keras.optimizers import RMSprop

import pickle
import gradio as gr
import yake
import spacy
from spacy import displacy
import streamlit as st
import spacy_streamlit
nlp = spacy.load('en_core_web_sm')
import torch
import tensorflow as tf
from transformers import RobertaTokenizer, RobertaModel, AutoModelForSequenceClassification, TFAutoModelForSequenceClassification
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM
tokenizer = AutoTokenizer.from_pretrained("paragon-analytics/roberta_persuade")
model = AutoModelForSequenceClassification.from_pretrained("paragon-analytics/roberta_persuade")

# para_tokenizer = AutoTokenizer.from_pretrained("paragon-analytics/t5_para")
# para_model = AutoModelForSeq2SeqLM.from_pretrained("paragon-analytics/t5_para")

kw_extractor = yake.KeywordExtractor()
custom_kw_extractor = yake.KeywordExtractor(lan="en", n=2, dedupLim=0.2, top=10, features=None)

max_words = 2000
max_len = 111

from transformers_interpret import SequenceClassificationExplainer
cls_explainer = SequenceClassificationExplainer(
    model,
    tokenizer)
    
# load the model from disk
#filename = 'resil_lstm_model.sav'
#lmodel = pickle.load(open(filename, 'rb'))

# load the model from disk
#filename = 'tokenizer.pickle'
#tok = pickle.load(open(filename, 'rb'))

def process_final_text(text):
    X_test = str(text).lower()
    #l = []
    #l.append(X_test)
    #test_sequences = tok.texts_to_sequences(l)
    #test_sequences_matrix = sequence.pad_sequences(test_sequences,maxlen=max_len)
    #lstm_prob = lmodel.predict(test_sequences_matrix.tolist()).flatten()
    #lstm_pred = np.where(lstm_prob>=0.5,1,0)
    
    encoded_input = tokenizer(X_test, return_tensors='pt')
    output = model(**encoded_input)
    scores = output[0][0].detach().numpy()
    scores = tf.nn.softmax(scores)
    
    # Get Keywords:
    keywords = custom_kw_extractor.extract_keywords(X_test)
    letter = []
    score = []
    for i in keywords:
        if i[1]>0.4:
            a = "+++"
        elif (i[1]<=0.4) and (i[1]>0.1):
            a = "++"
        elif (i[1]<=0.1) and (i[1]>0.01):
            a = "+"
        else: 
            a = "NA"
    
        letter.append(i[0])
        score.append(a)
    
    keywords = [(letter[i], score[i]) for i in range(0, len(letter))]
    
    # Get NER:
        # NER: 
    doc = nlp(text)
    sp_html = displacy.render(doc, style="ent", page=True, jupyter=False)
    NER = (
        ""
        + sp_html
        + ""
    )
    
    # Transformer Interpret:
    word_attributions = cls_explainer(X_test)
    letter = []
    score = []
    for i in word_attributions:
        if i[1]>0.5:
            a = "++"
        elif (i[1]<=0.5) and (i[1]>0.1):
            a = "+"
        elif (i[1]>=-0.5) and (i[1]<-0.1):
            a = "-"
        elif i[1]<-0.5:
            a = "--"
        else: 
            a = "NA"
    
        letter.append(i[0])
        score.append(a)
    
    word_attributions = [(letter[i], score[i]) for i in range(0, len(letter))]

    # # Paraphraser:
    # batch = para_tokenizer(X_test, return_tensors='pt')
    # generated_ids = para_model.generate(batch['input_ids'])
    # para_list = para_tokenizer.batch_decode(generated_ids, skip_special_tokens=True)

    return {"Persuasive": float(scores.numpy()[1]), "Non-Persuasive": float(scores.numpy()[0])},keywords,NER,word_attributions
    
def main(prob1):
    text = str(prob1)
    obj = process_final_text(text)
    return obj[0],obj[1],obj[2],obj[3]
    
title = "Welcome to **Persuade** 🪐"
description1 = """
This app takes text (up to a few sentences) and predicts to what extent the text contains persuasive content.""" 

with gr.Blocks(title=title) as demo:
    gr.Markdown(f"## {title}")
    gr.Markdown(description1)
    gr.Markdown("""---""")
    prob1 = gr.Textbox(label="Enter Your Text Here:",lines=2, placeholder="Type it here ...")
    submit_btn = gr.Button("Analyze")
    #text = gr.Textbox(label="Text:",lines=2, placeholder="Please enter text here ...")
    #submit_btn2 = gr.Button("Analyze")

    with gr.Column(visible=True) as output_col:
        label = gr.Label(label = "Predicted Label")
        impplot = gr.HighlightedText(label="Important Words", combine_adjacent=False).style(
        color_map={"+++": "royalblue","++": "cornflowerblue",
         "+": "lightsteelblue", "NA":"white"})
        NER = gr.HTML(label = 'NER:')
        intp =gr.HighlightedText(label="Word Scores",
        combine_adjacent=False).style(color_map={"++": "darkgreen","+": "green", 
                                                "--": "darkred",
                                                "-": "red", "NA":"white"})

    submit_btn.click(
        main,
        [prob1],
        [label,impplot,NER,intp], api_name="ResText"
    )

    gr.Markdown("### Click on any of the examples below to see to what extent they contain resilience messaging:")
    gr.Examples([["Please stay at home and avoid unnecessary trips."],["Please stay at home and avoid unnecessary trips. We will survive this."],["We will survive this."],["Watch today’s news briefing with the latest updates on COVID-19 in Connecticut."],["So let's keep doing what we know works. Let's stay strong, and let's beat this virus. I know we can, and I know we can come out stronger on the other side."],["It is really wonderful how much resilience there is in human nature. Let any obstructing cause, no matter what, be removed in any way, even by death, and we fly back to first principles of hope and enjoyment."],["Resilience is accepting your new reality, even if it’s less good than the one you had before. You can fight it, you can do nothing but scream about what you’ve lost, or you can accept that and try to put together something that’s good."],["You survived all of the days you thought you couldn't, never underestimate your resilience."],["Like tiny seeds with potent power to push through tough ground and become mighty trees, we hold innate reserves of unimaginable strength. We are resilient."]], [prob1], [label,impplot,NER,intp], main, cache_examples=True)
    
demo.launch()