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import streamlit as st
from llama_index import SimpleDirectoryReader, GPTVectorStoreIndex
import os
import shutil


def save_file(files):
    directory_name = 'tmp_docs'

    # Remove existing files in the directory
    if os.path.exists(directory_name):
        for filename in os.listdir(directory_name):
            file_path = os.path.join(directory_name, filename)
            try:
                if os.path.isfile(file_path):
                    os.remove(file_path)
            except Exception as e:
                print(f"Error: {e}")

    # Save the new file with original filename
    if files is not None:
        for file in files:
            file_name = file.name
            file_path = os.path.join(directory_name, file_name)
            with open(file_path, 'wb') as f:
                shutil.copyfileobj(file, f)


def ingest(docs_dir):
    documents = SimpleDirectoryReader(docs_dir).load_data()
    index = GPTVectorStoreIndex.from_documents(documents)
    return index


def get_answer(index, message):
    response = query(index, message)
    return [('Chatbot', ''.join(response.response))]


def query(index, query_text):
    query_engine = index.as_query_engine()
    response = query_engine.query(query_text)
    return response


os.environ['OPENAI_API_KEY'] = st.text_input(
    "Enter your OpenAI API key", type="password")

if os.environ['OPENAI_API_KEY']:
    # Initialize chatbot history
    chatbot = []

    # Display file upload component
    files = st.file_uploader('Upload Files', accept_multiple_files=True)
    if files is not None:
        save_file(files)

    index = ingest('tmp_docs')

    # Display message input component
    message = st.text_input('Enter message')

    # If message is entered, ingest documents and get chatbot response
    if message:
        chatbot.append(('You', message))
        chatbot += get_answer(index, message)

    # Display chat history
    st.text_area('Chatbot:', value='\n'.join(
        [f'{x[0]}: {x[1]}' for x in chatbot]), height=250)