import gradio as gr
import uuid

# Sample data for menu items (You can replace these with your actual menu items)
menu_items = [
    {"id": 1, "name": "Burger", "price": 5.99},
    {"id": 2, "name": "Pizza", "price": 8.99},
    {"id": 3, "name": "Pasta", "price": 7.99},
    {"id": 4, "name": "Salad", "price": 4.99},
    {"id": 5, "name": "Soda", "price": 1.99}
]

# Simulated database (In real applications, use a real database)
customers = {}  # Stores customers by phone number
session_data = {}

# Function for user registration (signup)
def signup(name, phone):
    if phone in customers:
        return f"Phone number {phone} is already registered. Please log in."
    
    # Create a unique customer ID
    customer_id = f"CUST{str(uuid.uuid4().int)[:6]}"  # Shortened unique customer ID
    customers[phone] = {"name": name, "phone": phone, "customer_id": customer_id}
    
    return f"Signup successful! Welcome {name}. Your customer ID is {customer_id}."

# Function for user login
def login(phone):
    if phone in customers:
        customer = customers[phone]
        session_data['customer_id'] = customer['customer_id']
        session_data['customer_name'] = customer['name']
        return f"Welcome {customer['name']}! You are now logged in."
    else:
        return "Phone number not found. Please register first."

# Display menu after login
def display_menu():
    if 'customer_id' not in session_data:
        return "Please log in first to view the menu."
    
    menu = "\n".join([f"{item['id']}. {item['name']} - ${item['price']}" for item in menu_items])
    return f"Welcome, {session_data['customer_name']}! Here is the menu:\n\n{menu}"

# Add item to cart
def add_to_cart(item_id, quantity):
    if 'customer_id' not in session_data:
        return "Please log in first to add items to your cart."
    
    cart = session_data.get('cart', [])
    cart.append({"item_id": item_id, "quantity": quantity})
    session_data['cart'] = cart
    return f"Item added to cart. Cart has {len(cart)} item(s)."

# View cart contents
def view_cart():
    if 'customer_id' not in session_data:
        return "Please log in first to view your cart."
    
    cart = session_data.get('cart', [])
    cart_items = []
    total_price = 0
    for item in cart:
        item_details = next((menu_item for menu_item in menu_items if menu_item['id'] == item['item_id']), None)
        if item_details:
            cart_items.append(f"{item_details['name']} x {item['quantity']} - ${item_details['price'] * item['quantity']}")
            total_price += item_details['price'] * item['quantity']
    return "\n".join(cart_items) + f"\nTotal Price: ${total_price}"

# Proceed to order function
def proceed_to_order(table_number):
    if 'customer_id' not in session_data:
        return "Please log in first to proceed with your order."
    
    order_id = str(uuid.uuid4())  # Generate unique order ID
    cart = session_data.get('cart', [])
    order_details = {
        "order_id": order_id,
        "customer_id": session_data['customer_id'],
        "customer_name": session_data['customer_name'],
        "table_number": table_number,
        "items": cart
    }
    session_data['cart'] = []  # Clear cart after order
    return f"Order ID: {order_id}\nTable Number: {table_number}\nOrder Details: {order_details}"

# Gradio Interface for Signup (Registration)
signup_interface = gr.Interface(fn=signup, inputs=["text", "text"], outputs="text", title="Signup")

# Gradio Interface for Login
login_interface = gr.Interface(fn=login, inputs="text", outputs="text", title="Login")

# Gradio Interface for Menu
menu_interface = gr.Interface(fn=display_menu, inputs=None, outputs="text", title="Menu")

# Gradio Interface for Cart
cart_interface = gr.Interface(fn=view_cart, inputs=None, outputs="text", title="Cart")

# Gradio Interface for Proceed to Order
order_interface = gr.Interface(fn=proceed_to_order, inputs="text", outputs="text", title="Proceed to Order")

# Launch Gradio app with multiple tabs
demo = gr.TabbedInterface([signup_interface, login_interface, menu_interface, cart_interface, order_interface], ["Signup", "Login", "Menu", "Cart", "Order"])
demo.launch()