app.py

import streamlit as st
import json 

st.title("Streamlit Chatbot") 

def load_user_data(): 
    try: 
        with open('user_data.json', 'r') as f: 
            data = json.load(f)
            st.session_state.name = data['user_data'].get('name', '') 
            st.session_state.age = data['user_data'].get('age', '') 
            st.session_state.chat_history = data['user_data'].get('chat_history', []) 
    except FileNotFoundError: 
        print("user_data.json not found.") 
    except json.JSONDecodeError: 
        print("Error decoding user_data.json. The file might be corrupt.")

def save_user_data(): 
    data = { 
        'user_data': { 
            'name': st.session_state.name, 
            'age': st.session_state.age, 
            'chat_history': st.session_state.chat_history 
        } 
    } 
    with open('user_data.json', 'w') as f: 
        json.dump(data, f)  # Correct usage of json.dump

if 'chat_state' not in st.session_state:    
    st.session_state.chat_state = 'get_name' 
    load_user_data()

if st.session_state.chat_state == 'get_name':    
    st.write("Welcome! Please enter your name:")    
    name = st.text_input('Your Name')    
    if st.button('Start Chat'):        
        st.session_state.name = name        
        st.session_state.chat_state = 'get_age'

elif st.session_state.chat_state == 'get_age':    
    st.write(f"Hello, {st.session_state.name}! Enter your age:")    
    age = st.text_input('Your Age')    
    if st.button('Submit'): 
        st.session_state.age = age # Store the age       
        save_user_data()        
        st.session_state.chat_state = 'chat'

elif st.session_state.chat_state == 'chat':    
    st.write("Chat History:")     
    for msg in st.session_state.chat_history:          
        st.write(f"**{msg['role']}**: {msg['message']}")    
    
    st.write("Ask me anything:")    
    message = st.text_input('Your Message')    
    if st.button('Send'):        
        if message.lower() in ['hi', 'hello', 'hey']:            
            chatbot_response = f"Hello, {st.session_state.name}!"         
        elif 'how are you' in message.lower():            
            chatbot_response = "I'm doing well, thanks for asking!"        
        else:            
            chatbot_response = "I'm still learning. Can you try asking something else?"                

        # st.session_state.chat_history.append({"role": "user", "message": message})        
        # st.session_state.chat_history.append({"role": "bot", "message": chatbot_response})        
        save_user_data()  # Save all data