app.py

import gradio as gr
import pandas as pd

# Function to load the menu data
def load_menu():
    menu_file = "menu.xlsx"  # Ensure this file exists in the same directory
    try:
        return pd.read_excel(menu_file)
    except Exception as e:
        raise ValueError(f"Error loading menu file: {e}")

# Function to filter menu items based on preference
def filter_menu(preference):
    menu_data = load_menu()
    if preference == "Halal/Non-Veg":
        filtered_data = menu_data[menu_data["Ingredients"].str.contains("Chicken|Mutton|Fish|Prawns|Goat", case=False, na=False)]
    elif preference == "Vegetarian":
        filtered_data = menu_data[~menu_data["Ingredients"].str.contains("Chicken|Mutton|Fish|Prawns|Goat", case=False, na=False)]
    elif preference == "Guilt-Free":
        filtered_data = menu_data[menu_data["Description"].str.contains(r"Fat: ([0-9]|10)g", case=False, na=False)]
    else:
        filtered_data = menu_data

    html_content = ""
    for _, item in filtered_data.iterrows():
        html_content += f"""
        <div style="display: flex; align-items: center; border: 1px solid #ddd; border-radius: 8px; padding: 15px; margin-bottom: 10px; box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);">
    <div style="flex: 1; margin-right: 15px;">
        <h3 style="margin: 0; font-size: 18px;">{item['Dish Name']}</h3>
        <p style="margin: 5px 0; font-size: 16px; color: #888;">${item['Price ($)']}</p>
        <p style="margin: 5px 0; font-size: 14px; color: #555;">{item['Description']}</p>
    </div>
    <div style="flex-shrink: 0; text-align: center;">
        <img src="{item['Image URL']}" alt="{item['Dish Name']}" style="width: 100px; height: 100px; border-radius: 8px; object-fit: cover; margin-bottom: 10px;">
        <button style="background-color: #28a745; color: white; border: none; padding: 8px 15px; font-size: 14px; border-radius: 5px; cursor: pointer;" 
                onclick="openModal('{item['Dish Name']}', '{item['Image URL']}', '{item['Description']}', '{item['Price ($)']}', event)">
            Add
        </button>
    </div>
</div>

        """
    return html_content

# JavaScript for modal and cart behavior
modal_and_cart_js = """
<style>
  .cart-container {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
    background-color: #f9f9f9;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ddd;
    padding: 10px 0;
  }
  .cart-item:last-child {
    border-bottom: none;
  }
  .cart-item span {
    font-size: 16px;
    margin-right: 10px;
  }
  .cart-item .quantity-container {
    display: flex;
    align-items: center;
    gap: 5px;
  }
  .cart-total {
    font-size: 18px;
    font-weight: bold;
    text-align: right;
    margin-top: 10px;
  }
</style>
<script>
    let cart = [];
    const extrasPrices = {
        "Thums up": 2,
        "Sprite": 2,
        "Extra Raitha": 1,
        "Extra Salan": 2,
        "Extra Onion & Lemon": 2,
        "Chilli Chicken": 14,
        "Veg Manchurian": 12
    };
   function openModal(name, image, description, price, event) {
    if (finalized) {
        alert("You cannot add more items after finalizing your order.");
        return;
    }
    const modal = document.getElementById('modal');
    modal.style.display = 'block';
    modal.style.position = 'absolute';

    // Get the button position and calculate modal position
    const buttonRect = event.target.getBoundingClientRect();
    const isSmallScreen = window.innerWidth <= 768;

    modal.style.top = `${window.scrollY + buttonRect.top + (isSmallScreen ? 20 : 0)}px`;
    modal.style.left = isSmallScreen
        ? "50%"
        : `${window.scrollX + buttonRect.left}px`;

    modal.style.transform = isSmallScreen ? "translateX(-50%)" : "none";
    modal.style.width = isSmallScreen ? "90%" : "30%";

    // Update modal content
    document.getElementById('modal-image').src = image;
    document.getElementById('modal-name').innerText = name;
    document.getElementById('modal-description').innerText = description;
    document.getElementById('modal-price').innerText = price;

    // Reset extras and quantity
    const extrasInputs = document.querySelectorAll('input[name="biryani-extra"]');
    extrasInputs.forEach(input => input.checked = false);
    document.getElementById('quantity').value = 1;
    document.getElementById('special-instructions').value = '';
}

    function closeModal() {
        document.getElementById('modal').style.display = 'none';
    }
    function addToCart() {
        if (finalized) {
            alert("You cannot add more items after finalizing your order.");
            return;
        }
        const name = document.getElementById('modal-name').innerText;
        const price = parseFloat(document.getElementById('modal-price').innerText.replace('$', ''));
        const quantity = parseInt(document.getElementById('quantity').value) || 1;
        const instructions = document.getElementById('special-instructions').value;
        const extras = Array.from(document.querySelectorAll('input[name="biryani-extra"]:checked')).map(extra => extra.value);
        const extrasCost = extras.reduce((sum, extra) => sum + (extrasPrices[extra] || 0), 0);
        const itemTotal = (price + extrasCost) * quantity;
        const cartItem = { name, price, quantity, instructions, extras, itemTotal, extrasQuantities: extras.map(() => 1) };
        cart.push(cartItem);
        alert(`${name} added to cart!`);
        updateCartDisplay();
        closeModal();
    }
    function updateCartDisplay() {
        let totalBill = 0;
        let cartHTML = "<div class='cart-container'>";
        cart.forEach((item, index) => {
            totalBill += item.itemTotal;
            const extras = item.extras.map((extra, i) => {
                const extraQuantity = item.extrasQuantities ? item.extrasQuantities[i] || 1 : 1;
                const extraTotal = extrasPrices[extra] * extraQuantity;
                totalBill += extraTotal;
                return `<div class='cart-item'>
                            <span>${extra}</span>
                            <span>Price: $${extrasPrices[extra].toFixed(2)}</span>
                            <div class='quantity-container'>
                                <label for='extra-quantity-${index}-${i}'>Quantity:</label>
                                <input type='number' id='extra-quantity-${index}-${i}' value='${extraQuantity}' min='1' style='width: 50px;' onchange='updateExtraQuantity(${index}, ${i}, this.value)'>
                            </div>
                            <span>Total: $${extraTotal.toFixed(2)}</span>
                            <input type='checkbox' id='extra-remove-${index}-${i}' onclick='removeExtra(${index}, ${i})'> Remove
                        </div>`;
            }).join('');
            cartHTML += `<div class='cart-item'>
                            <span>${item.name}</span>
                            <span>Item Price: $${item.price.toFixed(2)}</span>
                            <div class='quantity-container'>
                                <label for='item-quantity-${index}'>Quantity:</label>
                                <input type='number' id='item-quantity-${index}' value='${item.quantity}' min='1' style='width: 50px;' onchange='updateItemQuantity(${index}, this.value)'>
                            </div>
                            <span>Total: $${(item.price * item.quantity).toFixed(2)}</span>
                            <input type='checkbox' id='item-remove-${index}' onclick='removeItem(${index})'> Remove
                        </div>
                        ${extras}
                        <div class='cart-item'><strong>Instructions:</strong> ${item.instructions || "None"}</div>`;
        });
        cartHTML += `</div><p class='cart-total'>Total Bill: $${totalBill.toFixed(2)}</p>`;
        cartHTML += `<button style='margin-top: 10px; background-color: #007bff; color: white; border: none; padding: 10px; border-radius: 5px; width: 100%; cursor: pointer;' onclick='submitCart()'>Submit</button>`;
        document.getElementById('floating-cart').innerHTML = cartHTML;
    }
    function updateItemQuantity(index, newQuantity) {
        const quantity = parseInt(newQuantity) || 1;
        cart[index].quantity = quantity;
        cart[index].itemTotal = cart[index].price * quantity;
        updateCartDisplay();
    }
    function updateExtraQuantity(cartIndex, extraIndex, newQuantity) {
        const quantity = parseInt(newQuantity) || 1;
        cart[cartIndex].extrasQuantities = cart[cartIndex].extrasQuantities || [];
        cart[cartIndex].extrasQuantities[extraIndex] = quantity;
        updateCartDisplay();
    }
    function removeExtra(cartIndex, extraIndex) {
        cart[cartIndex].extras.splice(extraIndex, 1);
        if (cart[cartIndex].extrasQuantities) {
            cart[cartIndex].extrasQuantities.splice(extraIndex, 1);
        }
        updateCartDisplay();
    }
    function removeItem(index) {
        cart.splice(index, 1);
        updateCartDisplay();
    }
    function submitCart() {
        let finalOrderHTML = "<h3>Final Order:</h3><ul>";
        let totalBill = 0;
        cart.forEach(item => {
            totalBill += item.itemTotal;
            const extras = item.extras.map((extra, i) => {
                const extraQuantity = item.extrasQuantities ? item.extrasQuantities[i] || 1 : 1;
                const extraTotal = extrasPrices[extra] * extraQuantity;
                totalBill += extraTotal;
                return `${extra} (x${extraQuantity}) - $${extraTotal.toFixed(2)}`;
            }).join(', ');
            finalOrderHTML += `<li>
                ${item.name} (x${item.quantity}) - $${item.itemTotal.toFixed(2)}
                <br>Extras: ${extras}
                <br>Instructions: ${item.instructions || "None"}
            </li>`;
        });
        finalOrderHTML += `</ul><p><strong>Total Bill: $${totalBill.toFixed(2)}</strong></p>`;
        document.getElementById('final-order').innerHTML = finalOrderHTML;
        alert("Your final order has been submitted!");
    }
</script>
"""

# Gradio app definition
def app():
    with gr.Blocks() as demo:
        gr.Markdown("## Dynamic Menu with Preferences")

        # Radio button for selecting preference
        selected_preference = gr.Radio(
            choices=["All", "Vegetarian", "Halal/Non-Veg", "Guilt-Free"],
            value="All",
            label="Choose a Preference",
        )

        # Output area for menu items
        menu_output = gr.HTML(value=filter_menu("All"))

        # Floating cart display
        cart_output = gr.HTML(value="Your cart is empty.", elem_id="floating-cart")

        # Final order display
        final_order_output = gr.HTML(value="", elem_id="final-order")

        # Modal window
        modal_window = gr.HTML("""
        <div id="modal" style="display: none; position: fixed; background: white; border-radius: 8px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); padding: 20px; z-index: 1000;">
            <div style="text-align: right;">
                <button onclick="closeModal()" style="background: none; border: none; font-size: 18px; cursor: pointer;">&times;</button>
            </div>
            <img id="modal-image" style="width: 100%; height: auto; border-radius: 8px; margin-bottom: 20px;" />
            <h2 id="modal-name"></h2>
            <p id="modal-description"></p>
            <p id="modal-price"></p>
            <!-- Biryani Extras -->
            <label for="biryani-extras">Biryani Extras :</label>
            <div id="biryani-extras-options" style="display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0;">
                <label><input type="checkbox" name="biryani-extra" value="Thums up" /> Thums up + $2.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Sprite" /> Sprite + $2.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Extra Raitha" /> Extra Raitha  + $1.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Extra Salan" /> Extra Salan  + $2.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Extra Onion & Lemon" /> Extra Onion & Lemon + $2.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Chilli Chicken" /> Chilli Chicken + $14.00</label>
                <label><input type="checkbox" name="biryani-extra" value="Veg Manchurian" /> Veg Manchurian + $12.00</label>
            </div>
            <!-- Quantity and Special Instructions -->
            <label for="quantity">Quantity:</label>
            <input type="number" id="quantity" value="1" min="1" style="width: 50px;" />
            <br><br>
            <textarea id="special-instructions" placeholder="Add special instructions here..." style="width: 100%; height: 60px;"></textarea>
            <br><br>
            <!-- Add to Cart Button -->
            <button style="background-color: #28a745; color: white; border: none; padding: 10px 20px; font-size: 14px; border-radius: 5px; cursor: pointer;" onclick="addToCart()">Add to Cart</button>
        </div>
        """)

        # Update menu dynamically based on preference
        selected_preference.change(filter_menu, inputs=[selected_preference], outputs=[menu_output])

        # Layout
        gr.Row([selected_preference])
        gr.Row(menu_output)
        gr.Row(cart_output)
        gr.Row(modal_window)
        gr.Row(final_order_output)
        gr.HTML(modal_and_cart_js)

    return demo

if __name__ == "__main__":
    demo = app()