Code Editor for app.py

import streamlit as st
import random
import time

def response_generator():
    responses = [
        "Hello there! How can I assist you today?",
        "Hi, human! Is there anything I can help you with?",
        "Do you need help?",
    ]
    return random.choice(responses)

st.set_page_config(page_title="Simple Chat Bot")
st.title("Simple Chat Bot")

if "messages" not in st.session_state:
    st.session_state.messages = []
if "waiting_for_response" not in st.session_state:
    st.session_state.waiting_for_response = False

for message in st.session_state.messages:
    with st.chat_message(message["role"]):
        st.markdown(message["content"])

if prompt := st.chat_input("What is up?", disabled=st.session_state.waiting_for_response) or st.session_state.waiting_for_response:
    if not st.session_state.waiting_for_response:
        st.session_state.messages.append({"role": "user", "content": prompt})
        with st.chat_message("user"):
            st.markdown(prompt)
        st.session_state.waiting_for_response = True
        st.rerun()
    else:
        with st.spinner("Assistant is typing..."):
            time.sleep(1)
            response = response_generator()
            st.session_state.messages.append({"role": "assistant", "content": response})
            with st.chat_message("assistant"):
                st.markdown(response)
        st.session_state.waiting_for_response = False
        st.rerun()