{#
/**
 * @file
 * Theme override to display a menu.
 *
 * Available variables:
 * - menu_name: The machine name of the menu.
 * - items: A nested list of menu items. Each menu item contains:
 *   - attributes: HTML attributes for the menu item.
 *   - below: The menu item child items.
 *   - title: The menu link title.
 *   - url: The menu link url, instance of \Drupal\Core\Url
 *   - localized_options: Menu link localized options.
 *   - is_expanded: TRUE if the link has visible children within the current
 *     menu tree.
 *   - is_collapsed: TRUE if the link has children within the current menu tree
 *     that are not currently visible.
 *   - in_active_trail: TRUE if the link is in the active trail.
 */
#}
{% import _self as menus %}
{# dump(url('<current>')|render) #}
{% macro addLevel(items, level, attributes) %}

 {% if level == 1 %}
  <ul {{ attributes.addClass(['nav', 'flex-column', 'menu__level-1']) }}">
  {% else %}
  <ul class="{{ 'flex-column menu__level-' ~ level }}">
  {% endif %}
    {% for item in items %}
      {% set classes = [
        'nav-link',
        item.in_active_trail ? 'active'
      ]
      %}
      <li class="nav-item{{ item.below ? ' menu__has-children' }}{{ (item.below and item.in_active_trail) ? ' menu__expanded' }}">

      {{ link(item.title, item.url, { 'class': classes, 'aria-current': (item.in_active_trail ? 'true' : 'false') }) }}
      {% if item.below and item.in_active_trail %}
        {{ menus.addLevel(item.below, level+1, attributes) }}
      {% endif %}
      </li>
    {% endfor %}
  </ul>
{% endmacro %}

{{ menus.addLevel(items, 1, attributes) }}


{#
We call a macro which calls itself to render the full tree.
@see http://twig.sensiolabs.org/doc/tags/macro.html

{{ menus.build_menu(items, attributes, 0) }}

{% macro build_menu(items, attributes, menu_level) %}
  {% import _self as menus %}
  {% if items %}
    {% if menu_level == 0 %}
<ul{{ attributes.addClass('navbar-nav mr-auto') }}>
  {% else %}
  <ul class="dropdown-menu">
    {% endif %}
    {% for item in items %}
      {{ menus.add_link(item, attributes, menu_level) }}
    {% endfor %}
  </ul>
  {% endif %}
  {% endmacro %}

  {% macro add_link(item, attributes, menu_level) %}
    {% import _self as menus %}
    {%
      set list_item_classes = [
      'nav-item',
      item.is_expanded ? 'dropdown',
      (item.is_expanded and menu_level == 1) ? 'dropdown-submenu'
    ]
    %}
    {%
      set link_class = [
      menu_level == 0 ? 'nav-item',
      menu_level == 0 ? 'nav-link',
      item.in_active_trail ? 'active',
      menu_level == 0 and (item.is_expanded or item.is_collapsed) ? 'dropdown-toggle',
      menu_level > 0 ? 'dropdown-item',
      ( item.below and menu_level == 2 ) ? 'dropdown-menu',
    ]
    %}
    {%
      set toggle_class = [
    ]
    %}
    <li{{ item.attributes.addClass(list_item_classes) }}>
      {% if menu_level <= 2 and item.below %}
        {{ link(item.title, item.url, { 'class': link_class, 'role': 'button', 'data-bs-toggle': (menu_level == 1 ? '' : 'dropdown'), 'aria-expanded': 'false', 'title': ('Expand menu' | t) ~ ' ' ~ item.title }) }}
        {{ menus.build_menu(item.below, attributes, menu_level + 1) }}
      {% else %}
        {{ link(item.title, item.url, { 'class': link_class }) }}
      {% endif %}
    </li>
  {% endmacro %}
#}