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import streamlit as st
import chatbot_bedrock as demo_chat
from transformers import AutoModelForCausalLM, AutoTokenizer

st.title("Hi, I am Chatbot Philio :mermaid:")
st.write("I am your hotel booking assistant for today.")

# tokenizer = AutoTokenizer.from_pretrained("KvrParaskevi/Hotel-Assistant-Attempt4-Llama-2-7b")

# [theme]
# base="light"
# primaryColor="#6b4bff"
if(hugging_face_key != ""):
    model_Loading = True
    if model_Loading == True:
        model = demo_chat.get_Model()
        model_Loading = False

    #Application 
    with st.container():
        st.markdown('<div class="scrollable-div">', unsafe_allow_html=True)
        #Langchain memory in session cache 
        if 'memory' not in st.session_state:
            st.write("Memory is initilizing ...")
            st.session_state.memory = demo_chat.demo_miny_memory(model)

        #Check if chat history exists in this session
        if 'chat_history' not in st.session_state:
            st.session_state.chat_history = [ ] #Initialize chat history

        #renders chat history
        for message in st.session_state.chat_history: 
            with st.chat_message(message["role"]):
                st.write(message["content"])

        #Set up input text field
        input_text = st.chat_input(placeholder="Here you can chat with Llamma 2 model.")

        if input_text:
            with st.chat_message("user"):
                st.write(input_text)
                st.session_state.chat_history.append({"role" : "user", "content" : input_text}) #append message to chat history

            chat_response = demo_chat.demo_chain(input_text=input_text, memory=st.session_state.memory, model= model)
            first_answer = chat_response.split("Human")[0] #Because of Predict it prints the whole conversation.Here we seperate the first answer only.

            with st.chat_message("assistant"):
                st.write(first_answer)
                st.session_state.chat_history.append({"role": "assistant", "content": first_answer})
        st.markdown('</div>', unsafe_allow_html=True)