import gradio as gr
import requests

# ✅ Correct Rasa backend URL including REST webhook path
RASA_BACKEND = "https://web-production-37bcd.up.railway.app/webhooks/rest/webhook"


def chat_with_rasa(message, chat_history):
    payload = {
        "sender": "user",  # or any unique ID per session
        "message": message
    }
    try:
        response = requests.post(RASA_BACKEND, json=payload, timeout=10)
        response.raise_for_status()
        bot_responses = response.json()
    except Exception as e:
        return chat_history + [(message, f"Error: {e}")], ""

    # Extract text responses from Rasa
    for bot in bot_responses:
        if "text" in bot:
            chat_history.append((message, bot["text"]))
        else:
            chat_history.append((message, "🤖 Sorry, I didn't understand that."))

    return chat_history, ""

# Gradio interface
with gr.Blocks() as demo:
    chatbot = gr.Chatbot()
    msg = gr.Textbox(show_label=False, placeholder="Type your message here...")
    state = gr.State([])

    msg.submit(chat_with_rasa, inputs=[msg, state], outputs=[chatbot, msg])
    msg.submit(lambda: "", None, msg)  # clear input

demo.launch()