import gradio as gr
import pandas as pd

# Load menu from Excel file
def load_menu(file_path="menu.xlsx"):
    """
    Load menu data from an Excel file.
    """
    menu_df = pd.read_excel(file_path)
    menu = menu_df.to_dict(orient="records")
    return menu

# Initialize menu and cart
menu_data = load_menu()
cart = []

def display_menu():
    """
    Function to render the menu as HTML.
    """
    menu_html = ""
    for item in menu_data:
        menu_html += f"""
        <div style="display: flex; margin-bottom: 15px; align-items: center; border: 1px solid #ddd; padding: 10px; border-radius: 5px;">
            <img src="{item['Image']}" alt="{item['Name']}" style="width: 100px; height: 100px; margin-right: 15px; border-radius: 5px;">
            <div style="flex-grow: 1;">
                <h4 style="margin: 0;">{item['Name']} - ${item['Price']}</h4>
                <p style="margin: 5px 0; font-size: 12px;">{item['Description']}</p>
                <label for="quantity-{item['Name']}" style="margin-right: 10px;">Quantity:</label>
                <input type="number" id="quantity-{item['Name']}" value="1" min="1" style="width: 50px;">
            </div>
            <button onclick="add_to_cart('{item['Name']}', document.getElementById('quantity-{item['Name']}').value)" style="background-color: #28a745; color: white; border: none; padding: 8px 12px; border-radius: 5px; cursor: pointer;">Add</button>
        </div>
        """
    return menu_html

def add_to_cart(item_name, quantity):
    """
    Add an item to the cart and return success message with cart count.
    """
    quantity = int(quantity)
    # Check if the item already exists in the cart
    for item in cart:
        if item["name"] == item_name:
            item["quantity"] += quantity
            break
    else:
        # Add new item to cart
        for item in menu_data:
            if item["Name"] == item_name:
                cart.append({"name": item_name, "price": item["Price"], "quantity": quantity})
                break
    return f"{item_name} added to cart! Total items: {len(cart)}"

def view_cart():
    """
    Render the cart contents and calculate the total price.
    """
    if not cart:
        return "Your cart is empty."
    
    cart_html = "<h3>Cart Summary:</h3><ul>"
    total_price = 0
    for item in cart:
        cart_html += f"<li>{item['name']} (x{item['quantity']}) - ${item['price'] * item['quantity']}</li>"
        total_price += item["price"] * item["quantity"]
    cart_html += f"</ul><h4>Total Price: ${total_price}</h4>"
    return cart_html

# Gradio Interface
def menu_page():
    return gr.update(value=display_menu(), visible=True), gr.update(visible=False)

def cart_page():
    return gr.update(value=view_cart(), visible=True), gr.update(visible=False)

with gr.Blocks() as demo:
    gr.Markdown("# Dynamic Food Menu")
    
    # Menu and Cart Views
    menu_display = gr.HTML(value=display_menu(), visible=True)
    cart_display = gr.HTML(visible=False)
    notification = gr.Textbox(label="Notification", value="", interactive=False)
    
    # Navigation Buttons
    with gr.Row():
                menu_button = gr.Button("Menu")
        cart_button = gr.Button("View Cart")
    
    # Add item interaction
    food_item_input = gr.Textbox(visible=False)  # Hidden input to capture item name
    quantity_input = gr.Number(visible=False)   # Hidden input to capture quantity
    add_button = gr.Button("Add to Cart", visible=False)  # Simulated button for functionality

    # Notification when item is added
    add_button.click(add_to_cart, inputs=[food_item_input, quantity_input], outputs=notification)
    
    # Navigation between Menu and Cart pages
    menu_button.click(menu_page, outputs=[menu_display, cart_display])
    cart_button.click(cart_page, outputs=[cart_display, menu_display])
    
    # Render menu and cart
    demo += menu_display
    demo += cart_display
    demo += notification

demo.launch()