import streamlit as st
from streamlit_chat import message
from streamlit_extras.colored_header import colored_header
from streamlit_extras.add_vertical_space import add_vertical_space
from hugchat import hugchat

st.set_page_config(page_title="OpenAssistant-Chatbot-FTW-Open-Source")

with st.sidebar:
    st.title('🤗💬 HugChat App')
    st.markdown('''
    ## 💡LLM-powered chatbot built using:
    - [Streamlit](<https://streamlit.io/>)
    - [HugChat](<https://github.com/Soulter/hugging-chat-api>)
    - [OpenAssistant/oasst-sft-6-llama-30b-xor](<https://huggingface.co/OpenAssistant/oasst-sft-6-llama-30b-xor>) LLM model
    ''')
    add_vertical_space(5)

if 'generated' not in st.session_state:
    st.session_state['generated'] = ["Hi.  Please enter a prompt with context on what you need."]
if 'past' not in st.session_state:
    st.session_state['past'] = ['Hi.']
input_container = st.container()
colored_header(label='', description='', color_name='blue-70')
response_container = st.container()

def get_text():
    input_text = st.text_input("You: ", "", key="input")
    return input_text
    
with input_container:
    user_input = get_text()
    
def generate_response(prompt):
    chatbot = hugchat.ChatBot()
    response = chatbot.chat(prompt)
    return response
    
with response_container:
    if user_input:
        response = generate_response(user_input)
        st.session_state.past.append(user_input)
        st.session_state.generated.append(response)
    if st.session_state['generated']:
        for i in range(len(st.session_state['generated'])):
            message(st.session_state['past'][i], is_user=True, key=str(i) + '_user')
            message(st.session_state['generated'][i], key=str(i))