app.py

import gradio as gr
import time

def bot_response(message, history):
    print("\n=== Bot Response Function ===")
    print(f"Received message: {message}")
    print(f"Initial history: {history}")
    
    history = history or []
    messages = []
    
    # First message
    print("\nAdding first message pair...")
    messages.append({"role": "assistant", "content": "Thinking..."})
    history.extend(messages)
    print(f"History after first message: {history}")
    yield history
    time.sleep(1)
    
    # Second message
    print("\nAdding second message...")
    messages = [{"role": "assistant", "content": "This is the part 1 of bot response"}]
    history.extend(messages)
    print(f"History after second message: {history}")
    yield history
    time.sleep(1)
    
    # Third message
    print("\nAdding third message...")
    messages = [{"role": "assistant", "content": "And this is part 2"}]
    history.extend(messages)
    print(f"History after third message: {history}")
    yield history
    time.sleep(1)
    
    # Fourth message
    print("\nAdding fourth message...")
    messages = [{"role": "assistant", "content": "LAstly, some code:\n```python\nprint('hello world')\n```"}]
    history.extend(messages)
    print(f"History after fourth message: {history}")
    yield history

with gr.Blocks() as demo:
    chatbot = gr.Chatbot(
        height=600,
        group_consecutive_messages=False,
        type="messages"
    )
    msg = gr.Textbox()
    clear = gr.Button("Clear")

    def user(user_message, history):
        print("\n=== User Message Function ===")
        print(f"User message: {user_message}")
        print(f"Current history: {history}")
        
        # Only add user message if it's not empty
        if user_message.strip():
            new_history = history + [{"role": "user", "content": user_message}]
            print(f"New history after adding user message: {new_history}")
            return "", new_history
        return "", history

    msg.submit(
        user,
        [msg, chatbot],
        [msg, chatbot]
    ).then(
        bot_response,
        [msg, chatbot],
        chatbot
    )
    
    clear.click(lambda: None, None, chatbot, queue=False)

#demo.queue()
demo.launch(debug=True)