import streamlit as st
import time

def chat_interface():
    st.set_page_config(page_title="ChatGPT UI Clone", layout="wide")
    
    st.title("ChatGPT UI Clone")
    
    # Sidebar for settings
    with st.sidebar:
        st.header("Settings")
        model_option = st.selectbox("Select Model", ["GPT-3.5", "GPT-4"])
        temperature = st.slider("Temperature", 0.0, 1.0, 0.7, 0.1)
    
    # Chat history
    if "messages" not in st.session_state:
        st.session_state.messages = []
    
    for message in st.session_state.messages:
        with st.chat_message(message["role"]):
            st.markdown(message["content"])
    
    # User input
    user_input = st.chat_input("Type your message...")
    if user_input:
        st.session_state.messages.append({"role": "user", "content": user_input})
        with st.chat_message("user"):
            st.markdown(user_input)
        
        # Simulating a response
        with st.chat_message("assistant"):
            response_placeholder = st.empty()
            response_text = "Generating response..."
            response_placeholder.markdown(response_text)
            
            time.sleep(1)  # Simulating processing time
            response_text = f"You said: {user_input}"  # Replace with actual model response
            response_placeholder.markdown(response_text)
        
        st.session_state.messages.append({"role": "assistant", "content": response_text})

if __name__ == "__main__":
    chat_interface()