<?php
// update_cart.php
header('Content-Type: application/json');

require_once 'cart_handler.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = isset($_POST['action']) ? $_POST['action'] : '';
    $cartKey = isset($_POST['cart_key']) ? $_POST['cart_key'] : '';
    
    switch ($action) {
        case 'update_quantity':
            $quantity = isset($_POST['quantity']) ? intval($_POST['quantity']) : 1;
            $success = updateCartQuantity($cartKey, $quantity);
            break;
            
        case 'remove_item':
            $success = removeFromCart($cartKey);
            break;
            
        case 'clear_cart':
            $success = clearCart();
            break;
            
        default:
            $success = false;
            break;
    }
    
    if ($success) {
        echo json_encode([
            'success' => true,
            'cart_count' => getCartCount(),
            'message' => 'Cart updated successfully'
        ]);
    } else {
        echo json_encode([
            'success' => false,
            'message' => 'Failed to update cart'
        ]);
    }
} else {
    echo json_encode([
        'success' => false,
        'message' => 'Invalid request method'
    ]);
}
?>