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import streamlit as st
from streamlit_chat import message

from job_description_generator import predict_job_description, get_job_description_conversation
from job_description_fixer import fix_job_description, get_job_description_fixer_conversation

conversation = get_job_description_conversation()
if 'generator_conversation' not in st.session_state:
    st.session_state['generator_conversation'] = conversation

fixer_conversation = get_job_description_fixer_conversation()
if 'fixer_conversation' not in st.session_state:
    st.session_state['fixer_conversation'] = fixer_conversation

def message_writer(input_text, response):
    '''
        Writes the messages to the chat window.
    '''
    messages = []
    current_message = ""
    current_is_user = True
    for historical_message in response['history']:
        if "human" in historical_message.lower():
            messages.append([current_message, current_is_user])
            current_message = historical_message.replace("Human:", "")
            current_is_user = True
        elif "JobGPT" in historical_message:
            messages.append([current_message, current_is_user])
            current_message = historical_message.replace("JobGPT:", "")
            current_is_user = False
        else:
            current_message = current_message + "\n" + historical_message
    messages.append([current_message, current_is_user])
    for message_to_send, is_user in messages:
        if message_to_send.strip() != "":
            message(message_to_send, is_user=is_user)
    message(input_text, is_user=True)
    message(response['prediction'], is_user=False)
    return 0


def setup():
    """
    Streamlit related setup. This has to be run for each page.
    """
    hide_streamlit_style = """
    
    <style>
    #MainMenu {visibility: hidden;}
    footer {visibility: hidden;}
    </style>
    """
    st.markdown(hide_streamlit_style, unsafe_allow_html=True)

def main():
    '''
     Main function of the app.
    '''
    setup()

    #create a sidebar where you can select your page
    st.sidebar.title("JobGPT")
    st.sidebar.markdown("---")
    #selector
    page = st.sidebar.selectbox(
        "Select a page", ["Home", "Job Description Generator", "Job Description Fixer"])
    if page == "Home":
        st.title("JobGPT")
        st.write("Select a page in the sidebar to get started.")
        st.write("### Available options:")
        st.write("1. Job Description Generator")
        st.write("2. Job Description Fixer")
        st.markdown("---")

    elif page == "Job Description Generator":
        container_one = st.container()
        container_one.title("A Job Description Generating Chatbot")
        container_one.markdown(
            "JobGPT is a chatbot that generates job descriptions. \
                This is built just for demo purpose."
        )
        input_text = container_one.text_input(
            "Prompt",
            "Hi, can you please help me generate an unbiased job description?")
        button = container_one.button("Send")

        st.sidebar.markdown("---")
        st.sidebar.markdown("Click on `new chat` to start a new chat. \
                History will be cleared and you'll lose access to current chat."
                           )
        clear_session = st.sidebar.button("New Chat")

        if clear_session:
            st.session_state['generator_conversation'] = conversation
        container_one.markdown("---")

        initial_message = "Hello, how can I help you?"
        message(initial_message)

        if button:
            response = predict_job_description(input_text,
                                               st.session_state['generator_conversation'])
            message_writer(input_text, response)
    elif page == "Job Description Fixer":
        container_two = st.container()
        container_two.title("JobGPT: A Job Description Fixing Chatbot")
        container_two.markdown(
            "JobGPT is a chatbot that fixes job descriptions. This is built just for demo purpose."
        )
        input_text = container_two.text_area(
            "Prompt",
            "Hi, can you please help me fix my job description? It's biased.")
        button = container_two.button("Send")

        st.sidebar.markdown("---")
        st.sidebar.markdown("Click on `new chat` to start a new chat. \
                History will be cleared and you'll lose access to current chat."
                           )
        clear_session = st.sidebar.button("New Chat")

        if clear_session:
            st.session_state['fixer_conversation'] = fixer_conversation
        container_two.markdown("---")

        initial_message = "Hello, how can I help you?"
        message(initial_message)

        if button:
            response = fix_job_description(
                input_text, st.session_state['fixer_conversation'])
            message_writer(input_text, response)

main()