import gradio as gr
import datetime

# This list will store all the chat messages.
# In a real-world scenario, you might want to use a database for persistence.
chat_history = []

def add_message(message, username="Anonymous"):
    """
    Adds a new message to the chat history with a timestamp and username.
    """
    timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    formatted_message = f"[{timestamp}] {username}: {message}"
    chat_history.append(formatted_message)
    # Return the entire chat history as a single string, joined by newlines
    return "\n".join(chat_history)

# Define the Gradio interface
with gr.Blocks(title="SmilyAI Community Chat") as demo:
    gr.Markdown(
        """
        # Welcome to SmilyAI Community Chat! 👋
        Chat with your fellow community members here.
        """
    )

    # Textbox to display the chat history
    # Set it to read-only as users will add messages via the input box
    chat_display = gr.Textbox(
        label="Chat History",
        lines=20,
        interactive=False, # Make it non-editable by the user
        autoscroll=True,   # Automatically scroll to the bottom for new messages
        value="\n".join(chat_history) # Initialize with current history
    )

    # Input for the user's name
    username_input = gr.Textbox(
        label="Your Name (Optional)",
        placeholder="Enter your name",
        value="Anonymous", # Default value
        interactive=True # Users can change their name
    )

    # Input for the new message
    message_input = gr.Textbox(
        label="Your Message",
        placeholder="Type your message here...",
        lines=3
    )

    # Button to send the message
    send_button = gr.Button("Send Message")

    # When the send button is clicked, call the add_message function.
    # The outputs are updated in the chat_display textbox.
    # The message_input is cleared after sending.
    send_button.click(
        fn=add_message,
        inputs=[message_input, username_input],
        outputs=chat_display
    ).then(
        # Clear the message input after sending
        fn=lambda: "",
        inputs=[],
        outputs=message_input
    )

    # Also allow sending messages by pressing Enter in the message_input
    message_input.submit(
        fn=add_message,
        inputs=[message_input, username_input],
        outputs=chat_display
    ).then(
        # Clear the message input after submitting
        fn=lambda: "",
        inputs=[],
        outputs=message_input
    )

# Launch the Gradio app
# The share=True parameter creates a public shareable link (useful for Hugging Face Spaces)
# The server_name and server_port might be necessary for some environments,
# but Gradio usually handles this automatically on Hugging Face Spaces.
if __name__ == "__main__":
    demo.launch(share=True)