import gradio as gr
import pandas as pd
from bcrypt import hashpw, gensalt, checkpw

# File for storing user data
USER_FILE = "users.xlsx"

# Utility Functions
def save_user(name, phone, email, password):
    """Save user details to Excel file."""
    try:
        # Load existing users
        try:
            users = pd.read_excel(USER_FILE)
        except FileNotFoundError:
            users = pd.DataFrame(columns=["Name", "Phone", "Email", "Password"])

        # Check if email already exists
        if email in users["Email"].values:
            return False  # User already exists

        # Add new user
        hashed_password = hashpw(password.encode(), gensalt()).decode()
        new_user = {"Name": name, "Phone": phone, "Email": email, "Password": hashed_password}
        users = pd.concat([users, pd.DataFrame([new_user])], ignore_index=True)
        users.to_excel(USER_FILE, index=False)
        return True
    except Exception as e:
        print(f"Error saving user: {e}")
        return False

def check_credentials(email, password):
    """Check user credentials during login."""
    try:
        users = pd.read_excel(USER_FILE)
        user = users[users["Email"] == email]
        if not user.empty:
            return checkpw(password.encode(), user.iloc[0]["Password"].encode())
        return False
    except FileNotFoundError:
        return False

# 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 2 URL']}', '{item['Description']}', '{item['Price ($)']}')">Add</button>
            </div>
        </div>
        """
    return html_content
# Preserving your JavaScript for modal and cart functionality (Your original JavaScript logic)
modal_and_cart_js = """
<style>
  .cart-container {
    width: 90%; /* Ensure it fits the screen */
    margin: auto;
    display: flex;
    flex-direction: column;
    gap: 10px; /* Add space between cart items */
}
.cart-item {
    display: flex;
    flex-wrap: wrap; /* Wrap content to the next line if needed */
    align-items: center; /* Vertically align items */
    justify-content: space-between; /* Distribute space between items */
    width: 100%; /* Ensure it takes full width */
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
}
.cart-item span {
    margin-right: 10px;
    flex: 1; /* Allow text to take available space */
    min-width: 50px; /* Prevent collapsing */
}
.cart-item .quantity-container {
    display: flex;
    align-items: center;
    gap: 5px;
}
.cart-item button {
    background-color: red;
    color: white;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 5px;
    flex-shrink: 0; /* Prevent the button from shrinking */
}
.cart-total {
    font-size: 1.2em;
    font-weight: bold;
    text-align: center;
}
button {
    margin-top: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 5px;
    width: 100%;
    cursor: pointer;
}
@media (max-width: 768px) {
    .cart-item {
        flex-direction: column; /* Stack items on mobile */
        align-items: flex-start; /* Align to the left */
    }
    .cart-item button {
        align-self: flex-end; /* Place the remove button at the end */
        margin-top: 5px; /* Add some space on top */
    }
}
</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
    };
    let finalized = false;
    function openModal(name, image2, description, price) {
        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 = 'fixed';
        if (window.innerWidth <= 768) {
            modal.style.width = '90%';
            modal.style.top = `${event.touches ? event.touches[0].screenY : event.clientY}px`;
        } else {
            modal.style.width = '30%';
              modal.style.top = `${event.clientY}px`;// Use mouse Y position for laptop
        }
        modal.style.left = '50%';
        modal.style.transform = 'translate(-50%, -50%)';
        document.getElementById('modal-image').src = image2;
        document.getElementById('modal-name').innerText = name;
        document.getElementById('modal-description').innerText = description;
        document.getElementById('modal-price').innerText = price;
        const extrasInputs = document.querySelectorAll('input[name="biryani-extra"]');
        extrasInputs.forEach(input => input.checked = false);
        document.getElementById('quantity').value = 1;
        document.getElementById('special-instructions').value = '';
    }
    function closeModal() {
        document.getElementById('modal').style.display = 'none';
    }
    function addToCart() {
        if (finalized) {
            alert("You cannot add more items after finalizing your order.");
            return;
        }
        const name = document.getElementById('modal-name').innerText;
        const price = parseFloat(document.getElementById('modal-price').innerText.replace('$', ''));
        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>
                            <button style='background-color: red; color: white; border: none; padding: 5px 10px; cursor: pointer;' onclick='removeExtra(${index}, ${i})'>Remove</button>
                        </div>`;
            }).join('');
            cartHTML += `<div class='cart-item'>
                            <span>${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>
                            <button style='background-color: red; color: white; border: none; padding: 5px 10px; cursor: pointer;' onclick='removeItem(${index})'>Remove</button>
                         </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;
        // Trigger navigation to the final order page
        const finalOrderPage = document.getElementById('final-order-section');
        const cartPage = document.getElementById('cart-section');
        cartPage.style.display = 'none';
        finalOrderPage.style.display = 'block';
    }

</script>
"""
# Authentication and Navigation Logic
def authenticate_user(email, password):
    if check_credentials(email, password):
        return gr.update(visible=False), gr.update(visible=True), ""
    else:
        return gr.update(visible=True), gr.update(visible=False), "Invalid email or password. Try again."

def navigate_to_signup():
    return gr.update(visible=False), gr.update(visible=True)

def create_account(name, phone, email, password):
    if save_user(name, phone, email, password):
        return "Account created successfully! You can now log in.", gr.update(visible=True), gr.update(visible=False)
    else:
        return "Email already exists. Try logging in.", gr.update(visible=False), gr.update(visible=True)

def navigate_to_login():
    return gr.update(visible=True), gr.update(visible=False)

# Gradio App
def app():
    with gr.Blocks() as demo:
        # Login Page
        with gr.Column(visible=True) as login_section:
            gr.Markdown("# Login Page")
            login_email = gr.Textbox(label="Email", placeholder="Enter your email")
            login_password = gr.Textbox(label="Password", placeholder="Enter your password", type="password")
            login_error = gr.Label("")
            login_button = gr.Button("Login")
            go_to_signup = gr.Button("Create an Account")

        # Signup Page
        with gr.Column(visible=False) as signup_section:
            gr.Markdown("# Signup Page")
            signup_name = gr.Textbox(label="Name", placeholder="Enter your full name")
            signup_phone = gr.Textbox(label="Phone", placeholder="Enter your phone number")
            signup_email = gr.Textbox(label="Email", placeholder="Enter your email")
            signup_password = gr.Textbox(label="Password", placeholder="Enter your password", type="password")
            signup_message = gr.Label("")
            signup_button = gr.Button("Sign Up")
            go_to_login = gr.Button("Back to Login")

        # Menu Page
        with gr.Column(visible=False) as menu_section:
            gr.Markdown("### Menu Page (Accessible Only After Login)")

            # View Cart Button (Top Position)
            view_cart_button_top = gr.Button("View Cart")

            # Radio button for selecting preference
            selected_preference = gr.Radio(
                choices=["All", "Vegetarian", "Halal/Non-Veg", "Guilt Free"],
                value="All",
                label="Choose a Preference",
            )
            empty_div = gr.HTML('<div style="height: 20px;"></div>')

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

            # View Cart Button (Original Position)
            view_cart_button_bottom = gr.Button("View Cart")
            empty_div = gr.HTML('<div style="height: 300px;"></div>')

             # 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: 300px; 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"><strong>Add-ons :</strong></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 your 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(view_cart_button_top)  # View Cart button at the top
            gr.Row([selected_preference])
            gr.Row(menu_output)
            gr.Row(view_cart_button_bottom)  # View Cart button at the bottom
            gr.Row(modal_window)
            gr.HTML(modal_and_cart_js)

        # Cart & Final Order Page
        with gr.Column(visible=False, elem_id="cart-section") as cart_section:
            gr.Markdown("### Cart Page")
            cart_output = gr.HTML(value="Your cart is empty.", elem_id="floating-cart")
            #submitCart_button = gr.Button("Submit Cart")  # Keep only this button
            back_to_menu_button = gr.Button("Back to Menu")


        with gr.Column(visible=False, elem_id="final-order-section") as final_order_section:
            gr.Markdown("### Final Order")
            final_order_output = gr.HTML(value="", elem_id="final-order")

            

            # 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")

            # Button to navigate back to Menu Page
            #back_to_menu_button = gr.Button("Back to Menu")

            gr.Row(cart_output)
            gr.Row(final_order_output)

        # Button Bindings
        # Login Button
        login_button.click(
            lambda email, password: (gr.update(visible=False), gr.update(visible=True), "") if check_credentials(email, password) else (gr.update(), gr.update(), "Invalid email or password."),
            inputs=[login_email, login_password],
            outputs=[login_section, menu_section, login_error],
        )
        # Signup Button
        signup_button.click(
            lambda name, phone, email, password: ("Signup successful! Please login.", gr.update(visible=True), gr.update(visible=False)) if save_user(name, phone, email, password) else ("Email already exists.", gr.update(visible=False), gr.update(visible=True)),
            inputs=[signup_name, signup_phone, signup_email, signup_password],
            outputs=[signup_message, login_section, signup_section],
        )
        # Navigate to Signup Page
        go_to_signup.click(
            lambda: (gr.update(visible=False), gr.update(visible=True)),
            outputs=[login_section, signup_section],
        )
        # Navigate Back to Login Page
        go_to_login.click(
            lambda: (gr.update(visible=True), gr.update(visible=False)),
            outputs=[login_section, signup_section],
        )
        # Navigate to Cart Page (Both Buttons Use the Same Logic)
        view_cart_button_top.click(
            lambda: (gr.update(visible=False), gr.update(visible=True)),
            outputs=[menu_section, cart_section],
        )
        view_cart_button_bottom.click(
            lambda: (gr.update(visible=False), gr.update(visible=True)),
            outputs=[menu_section, cart_section],
        )

        # Navigate to Final Order Page
        # Navigate to Final Order Page
        #submitCart_button.click(
            #lambda: (gr.update(visible=False), gr.update(visible=True)),
            #outputs=[cart_section, final_order_section],
        #)
        # Navigate Back to Menu Page
        back_to_menu_button.click(
            lambda: (gr.update(visible=True), gr.update(visible=False)),
            outputs=[menu_section, cart_section],  # Show menu, hide cart
        )




    return demo

if __name__ == "__main__":
    app().launch()