Code Editor for app.py

import streamlit as st
import random
import time

# Streamed response emulator
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?",
    ]
    response = random.choice(responses)
    for word in response.split():
        yield word + " "
        time.sleep(0.1)

st.title("Simple Chat Bot")

# Initialize chat history
if "messages" not in st.session_state:
    st.session_state.messages = []

# Disable input during response generation
input_disabled = False

# Display chat messages from history on app rerun
for message in st.session_state.messages:
    with st.chat_message(message["role"]):
        st.markdown(message["content"])

# Accept user input
if prompt := st.chat_input("What is up?", disabled=input_disabled) or input_disabled:
    # Add user message to chat history
    if not input_disabled:
        st.session_state.messages.append({"role": "user", "content": prompt})
        # Display user message in chat message container
        with st.chat_message("user"):
            st.markdown(prompt)
        
        # Disable chat input
        input_disabled = True

        # Display assistant response in chat message container
        with st.chat_message("assistant"):
            st.write_stream(response_generator())
            
        # Add assistant response to chat history
        st.session_state.messages.append({"role": "assistant", "content": prompt})
        
        # Re-enable input after the response is generated
        st.rerun()