"""
#App: NLP App with Streamlit
Description
This is a Natural Language Processing(NLP) base Application that is useful for 
Document/Text Summarization from Bangla images and English Images/PDF files.
"""
# Core Pkgs
import os
os.environ["TOKENIZERS_PARALLELISM"] = "false"
#os.system('sudo apt-get install tesseract-ocr-eng')
#os.system('sudo apt-get install tesseract-ocr-ben')

#os.system('wget https://github.com/tesseract-ocr/tessdata/raw/main/ben.traineddata')
#os.system('gunzip ben.traineddata.gz ')
#os.system('sudo mv -v ben.traineddata /usr/local/share/tessdata/')
#os.system('pip install -q pytesseract')
#os.system('conda install -c conda-forge poppler')
import streamlit as st
st.set_page_config(page_title="Summarization Tool", layout="wide", initial_sidebar_state="expanded")
import torch
import docx2txt
from PIL import Image 
from PyPDF2 import PdfFileReader
from pdf2image import convert_from_bytes
import pdfplumber
#from line_cor import mark_region
import pdf2image
import requests
import cv2
import numpy as np
import pytesseract
import line_cor
import altair as alt
#pytesseract.pytesseract.tesseract_cmd = r"./Tesseract-OCR/tesseract.exe"
from PIL import Image
API_URL0 = "https://api-inference.huggingface.co/models/csebuetnlp/mT5_multilingual_XLSum"
headers0 = {"Authorization": "Bearer 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"}
API_URL1 = "https://api-inference.huggingface.co/models/Michael-Vptn/text-summarization-t5-base"
headers1 = {"Authorization": "Bearer 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"}
API_URL2 = "https://api-inference.huggingface.co/models/gpt2"
headers2 = {"Authorization": "Bearer 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"}
	
def read_pdf(file):
#     images=pdf2image.convert_from_path(file)
#     # print(type(images))
    pdfReader = PdfFileReader(file)
    count = pdfReader.numPages
    all_page_text = " "
    for i in range(count):
        page = pdfReader.getPage(i)
        all_page_text += page.extractText()+" "
    return all_page_text

def engsum(output):
    def query(payload):
        response = requests.post(API_URL1, headers=headers1, json=payload)
        return response.json()
        
    out = query({
        "inputs": output,
        "min_length":300
    })
    if isinstance(out, list) and out[0].get("generated_text"):
       text_output = out[0]["generated_text"]
       st.success(text_output)
def bansum(text):
    def query(payload):
        response = requests.post(API_URL0, headers=headers0, json=payload)
        return response.json()
    out = query({"inputs": text, "min_length":300})
    if isinstance(out, list) and out[0].get("summary_text"):
       text_output = out[0]["summary_text"]
       st.success(text_output) 

st.title("Bangla and English Summarizer:")
st.subheader("Please, upload your PDF/Images or input texts to summarize: ")
#@st.cache_resource(experimental_allow_widgets=True)
def main():
    """ NLP Based Application with Streamlit """
    def change_photo_state():
        st.session_state["photo"]="done"
    message = st.text_input("Type your text here!")
    uploaded_photo = st.sidebar.file_uploader("Upload your Images/PDF",type=['jpg','png','jpeg','pdf'], on_change=change_photo_state)
    camera_photo = st.sidebar.camera_input("Capture a photo to summarize: ", on_change=change_photo_state)
    if "photo" not in st.session_state:
        st.session_state["photo"]="not done"
    if st.session_state["photo"]=="done" or message:
        if uploaded_photo and uploaded_photo.type=='application/pdf':
            text=None
            #file = uploaded_photo.read() # Read the data
            #image_result = open(uploaded_photo.name, 'wb') # creates a writable image and later we can write the decoded result
            #image_result.write(file)
            tet = read_pdf(uploaded_photo)
            #tet = pytesseract.image_to_string(img, lang="ben") if st.checkbox("Mark to see Bangla Image's Text") else pytesseract.image_to_string(img)
            values = st.slider('Select a approximate number of lines to see and summarize',value=[0, len(tet)//(7*100)])
            st.text("Selected text for summarize: ")
            text = tet[values[0]*7*10:values[1]*7*10] if values[0]!=len(tet)//(7*10) else tet[len(tet)//(7*100):]
            st.success(text)
            st.text("Summarized text: ")
            engsum(text)
        if uploaded_photo and uploaded_photo.type !='application/pdf':
            text=None
            img = Image.open(uploaded_photo)
            img = img.save("img.png")
            img = cv2.imread("img.png")
            st.text("Select the summarization type:")
            if st.button("BENGALI"):
                text =  pytesseract.image_to_string(img, lang="ben")
                bansum(text)
            if st.button("ENGLISH"): 
                text=pytesseract.image_to_string(img)
                engsum(text)
            #st.success(text)
        if camera_photo:
            text=None
            img = Image.open(camera_photo)
            img = img.save("img.png")
            img = cv2.imread("img.png")
            #text = pytesseract.image_to_string(img) if st.checkbox("Bangla") else pytesseract.image_to_string(img, lang="ben")
            st.text("Select the summarization type:")
            if st.button("Bangla"):
                text =  pytesseract.image_to_string(img, lang="ben")
                bansum(text)
            if st.button("English"): 
                text=pytesseract.image_to_string(img)
                engsum(text)
        if message:
            text=None
            text = message
            if st.button("Bangla"):
                bansum(text)
            if st.button("English"): 
                engsum(text)  
        # if st.button("English Text Generation"): 
        #     def query(payload):
        #     	response = requests.post(API_URL2, headers=headers2, json=payload)
        #     	return response.json()
            	
        #     out = query({
        #     	"inputs": text,
        #     })
        #     if isinstance(out, list) and out[0].get("generated_text"):
        #         text_output = out[0]["generated_text"]
        #         st.success(text_output)
        #         #text=text_output

if __name__ == '__main__':
    main()