// Dynamic SPA menu tree (reads from backend via window.WNW_NAV_TREE)
export const NAV_TREE_VERSION = 'navTree-2025-10-28-dynamic';

export type NodeMode = 'spa' | 'bridge';
export type SubItem = {
  label: string;
  mode: NodeMode;
  path?: string;   // for SPA routes
  href?: string;   // for classic admin URLs
  exact?: boolean;
};
export type MainKey = string; // Changed from union to string to support dynamic keys
export type MainNode = {
  key: MainKey;
  label: string;
  path: string; // main path
  icon?: string; // lucide icon name
  children: SubItem[]; // will be frozen at runtime
};

/**
 * Get navigation tree from backend (dynamic)
 * Falls back to static tree if backend data not available
 */
function getNavTreeFromBackend(): MainNode[] {
  const backendTree = (window as any).WNW_NAV_TREE;
  
  if (Array.isArray(backendTree) && backendTree.length > 0) {
    return backendTree;
  }
  
  // Fallback to static tree (for development/safety)
  return getStaticFallbackTree();
}

/**
 * Static fallback tree (used if backend data not available)
 */
function getStaticFallbackTree(): MainNode[] {
  const admin =
    (window as any).wnw?.adminUrl ??
    (window as any).woonoow?.adminUrl ??
    '/wp-admin/admin.php';

  return [
    {
      key: 'dashboard',
      label: 'Dashboard',
      path: '/dashboard',
      icon: 'layout-dashboard',
      children: [
        { label: 'Overview', mode: 'spa', path: '/dashboard', exact: true },
        { label: 'Revenue', mode: 'spa', path: '/dashboard/revenue' },
        { label: 'Orders', mode: 'spa', path: '/dashboard/orders' },
        { label: 'Products', mode: 'spa', path: '/dashboard/products' },
        { label: 'Customers', mode: 'spa', path: '/dashboard/customers' },
        { label: 'Coupons', mode: 'spa', path: '/dashboard/coupons' },
        { label: 'Taxes', mode: 'spa', path: '/dashboard/taxes' },
      ],
    },
    {
      key: 'orders',
      label: 'Orders',
      path: '/orders',
      icon: 'receipt-text',
      children: [],
    },
    {
      key: 'products',
      label: 'Products',
      path: '/products',
      icon: 'package',
      children: [
        { label: 'All products', mode: 'spa', path: '/products' },
        { label: 'New', mode: 'spa', path: '/products/new' },
        { label: 'Categories', mode: 'spa', path: '/products/categories' },
        { label: 'Tags', mode: 'spa', path: '/products/tags' },
        { label: 'Attributes', mode: 'spa', path: '/products/attributes' },
      ],
    },
    {
      key: 'coupons',
      label: 'Coupons',
      path: '/coupons',
      icon: 'tag',
      children: [
        { label: 'All coupons', mode: 'spa', path: '/coupons' },
        { label: 'New', mode: 'spa', path: '/coupons/new' },
      ],
    },
    {
      key: 'customers',
      label: 'Customers',
      path: '/customers',
      icon: 'users',
      children: [
        { label: 'All customers', mode: 'spa', path: '/customers' },
      ],
    },
    {
      key: 'settings',
      label: 'Settings',
      path: '/settings',
      icon: 'settings',
      // Settings submenu available in all modes for consistent experience
      children: [
        // WooNooW Settings
        { label: 'WooNooW', mode: 'spa' as const, path: '/settings' },
        
        // Core Settings (Shopify-inspired)
        { label: 'Store Details', mode: 'spa' as const, path: '/settings/store' },
        { label: 'Payments', mode: 'spa' as const, path: '/settings/payments' },
        { label: 'Shipping & Delivery', mode: 'spa' as const, path: '/settings/shipping' },
        { label: 'Taxes', mode: 'spa' as const, path: '/settings/taxes' },
        { label: 'Checkout', mode: 'spa' as const, path: '/settings/checkout' },
        { label: 'Customer Accounts', mode: 'spa' as const, path: '/settings/customers' },
        { label: 'Notifications', mode: 'spa' as const, path: '/settings/notifications' },
        { label: 'Brand & Appearance', mode: 'spa' as const, path: '/settings/brand' },
        
        // Advanced (Bridge to WP Admin)
        { label: 'Advanced', mode: 'bridge' as const, href: `${admin}?page=wc-settings&tab=advanced` },
        { label: 'Integrations', mode: 'bridge' as const, href: `${admin}?page=wc-settings&tab=integration` },
        { label: 'System Status', mode: 'bridge' as const, href: `${admin}?page=wc-status` },
        { label: 'Extensions', mode: 'bridge' as const, href: `${admin}?page=wc-addons` },
      ],
    },
  ];
}

/**
 * Deep freeze tree for immutability
 */
function deepFreezeTree(src: MainNode[]): MainNode[] {
  return src.map((n) =>
    Object.freeze({
      ...n,
      children: Object.freeze([...(n.children ?? [])]),
    }) as MainNode
  ) as unknown as MainNode[];
}

/**
 * Export the navigation tree (reads from backend, falls back to static)
 */
export const navTree: MainNode[] = Object.freeze(
  deepFreezeTree(getNavTreeFromBackend())
) as unknown as MainNode[];