document.addEventListener('DOMContentLoaded', function() {
    const contactForm = document.getElementById('contactForm');
    const formMessage = document.getElementById('form-message');

    if (contactForm) {
        contactForm.addEventListener('submit', function(event) {
            event.preventDefault();

            const name = document.getElementById('name').value.trim();
            const email = document.getElementById('email').value.trim();
            const message = document.getElementById('message').value.trim();

            if (!name || !email || !message) {
                showMessage('Please fill out all fields.', 'error');
                return;
            }

            if (!validateEmail(email)) {
                showMessage('Please enter a valid email address.', 'error');
                return;
            }

            const formData = new FormData(contactForm);

            fetch('add_contact.php', {
                method: 'POST',
                body: formData
            })
            .then(response => response.json())
            .then(data => {
                if (data.success) {
                    showMessage('Thank you for your message! We will get back to you soon.', 'success');
                    contactForm.reset();
                } else {
                    showMessage(data.message || 'An error occurred. Please try again.', 'error');
                }
            })
            .catch(error => {
                console.error('Error:', error);
                showMessage('An error occurred. Please try again.', 'error');
            });
        });
    }

    function showMessage(message, type) {
        formMessage.textContent = message;
        formMessage.className = type;
    }

    function validateEmail(email) {
        const re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
        return re.test(String(email).toLowerCase());
    }
});

// --- Shopping Cart ---
const shoppingCart = {
    getCart: () => {
        const cart = localStorage.getItem('shoppingCart');
        return cart ? JSON.parse(cart) : { items: [], restaurantId: null };
    },
    saveCart: (cart) => {
        localStorage.setItem('shoppingCart', JSON.stringify(cart));
    },
    addItem: (item, restaurantId) => {
        const cart = shoppingCart.getCart();
        if (cart.restaurantId && cart.restaurantId !== restaurantId) {
            // If the item is from a different restaurant, ask for confirmation to clear the cart
            if (!confirm('You have items from another restaurant in your cart. Do you want to clear your cart and add this item?')) {
                return;
            }
            // Clear the cart
            cart.items = [];
        }

        cart.restaurantId = restaurantId;
        const existingItem = cart.items.find(i => i.id === item.id);

        if (existingItem) {
            existingItem.quantity++;
        } else {
            cart.items.push({ ...item, quantity: 1 });
        }
        shoppingCart.saveCart(cart);
        shoppingCart.updateCartCount();
        alert(`${item.name} has been added to your cart.`);
    },
    updateCartCount: () => {
        const cart = shoppingCart.getCart();
        const cartCount = cart.items.reduce((total, item) => total + item.quantity, 0);
        const cartCountElement = document.getElementById('cart-count');
        if (cartCountElement) {
            cartCountElement.textContent = cartCount;
        }
    }
};

document.addEventListener('DOMContentLoaded', () => {
    shoppingCart.updateCartCount();
});