app.py

import streamlit as st
import requests
import json
import os

# Set the API endpoint
API_ENDPOINT = os.environ.get("MY_SECRET_KEY")  # Change this to your API's address if different

def send_message(message):
    """Send a message to the API and return the response."""
    try:
        response = requests.post(
            f"{API_ENDPOINT}/api/chat",
            json={"message": message}  # Send as JSON in the request body
        )
        response.raise_for_status()  # Raise an exception for bad status codes
        return response.json()["response"]
    except requests.RequestException as e:
        st.error(f"Error communicating with the API: {e}")
        return None


def main():
    st.title("Banking Customer Query Chatbot")

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

    # 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"])

    # React to user input
    if prompt := st.chat_input("What is your question?"):
        # Display user message in chat message container
        st.chat_message("user").markdown(prompt)
        # Add user message to chat history
        st.session_state.messages.append({"role": "user", "content": prompt})

        response = send_message(prompt)
        if response:
            # Display assistant response in chat message container
            with st.chat_message("assistant"):
                st.markdown(response)
            # Add assistant response to chat history
            st.session_state.messages.append({"role": "assistant", "content": response})

if __name__ == "__main__":
    main()