{#
/**
 * @file
 * Olivesvoices's theme implementation for the menus in the primary_menu region.
 *
 * 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.
 *
 * @ingroup themeable
 */
#}
{{ attach_library('olivesvoices/navigation-primary') }}

{% import _self as menus %}

{#
  We call a macro which calls itself to render the full tree.
  @see https://twig.symfony.com/doc/3.x/tags/macro.html
#}
{% set attributes = attributes.addClass('menu') %}
{{ menus.menu_links(items, attributes, 0, 'primary-menu-item-') }}

{% macro menu_links(items, attributes, menu_level, aria_id) %}
  {% set primary_nav_level = 'primary-nav__menu--level-' ~ (menu_level + 1) %}
  {% set drupal_selector_primary_nav_level = menu_level <= 1 ? 'primary-nav-menu--level-' ~ (menu_level + 1) : false %}
  {% set is_top_level_menu = menu_level == 0 %}
  {% import _self as menus %}
  {% if items %}

    {#
      Place the menu arrow (caret) outside of the submenu because the submenu
      has the overflow:hidden CSS rule applied.
    #}
    {% if menu_level == 1 %}
      <span data-drupal-selector="primary-nav-menu-🥕" class="primary-nav__menu-🥕"></span>
    {% endif %}

    <ul {{ attributes.addClass('primary-nav__menu', primary_nav_level).setAttribute('data-drupal-selector', drupal_selector_primary_nav_level) }}>
      {% set attributes = attributes.removeClass(primary_nav_level) %}
      {% for item in items %}

        {% if item.url.isRouted and item.url.routeName == '<nolink>' %}
          {% set menu_item_type = 'nolink' %}
        {% elseif item.url.isRouted and item.url.routeName == '<button>' %}
          {% set menu_item_type = 'button' %}
        {% else %}
          {% set menu_item_type = 'link' %}
        {% endif %}

        {% set item_classes = [
            'primary-nav__menu-item',
            'primary-nav__menu-item--' ~ menu_item_type,
            'primary-nav__menu-item--level-' ~ (menu_level + 1),
            item.in_active_trail ? 'primary-nav__menu-item--active-trail',
            item.below ? 'primary-nav__menu-item--has-children',
          ]
        %}

        {% set link_classes = [
            'primary-nav__menu-link',
            'primary-nav__menu-link--' ~ menu_item_type,
            'primary-nav__menu-link--level-' ~ (menu_level + 1),
            item.in_active_trail ? 'primary-nav__menu-link--active-trail',
            item.below ? 'primary-nav__menu-link--has-children',
          ]
        %}

        <li{{ item.attributes.addClass(item_classes).setAttribute('data-drupal-selector', is_top_level_menu and item.below ? 'primary-nav-menu-item-has-children': false) }}>
          {#
            A unique HTML ID should be used, but that isn't available through
            Twig yet, so the |clean_id filter is used for now.
            @see https://www.drupal.org/project/drupal/issues/3115445
          #}
          {% set aria_id = (aria_id ~ loop.index )|clean_id %}
          {% set link_title %}
            <span class="primary-nav__menu-link-inner primary-nav__menu-link-inner--level-{{ menu_level + 1 }}">{{ item.title }}</span>
          {% endset %}

          {% if menu_item_type == 'link' or menu_item_type == 'nolink' %}
            {{ link(menu_item_type == 'link' ? link_title : item.title, item.url, {
              'class': link_classes,
              'data-drupal-selector': is_top_level_menu ? 'primary-nav-menu-link-has-children' : false,
              })
            }}

            {% if item.below %}
              {#
                Aria-hidden  and tabindex attributes are removed via JS. Button is non-functional,
                but still visible in non-JS environments so that chevron can indicate presence of
                drop menu).
              #}
              {% if is_top_level_menu %}
                {% set toggle_button_attributes = create_attribute({
                  'class': 'primary-nav__button-toggle',
                  'data-drupal-selector': 'primary-nav-submenu-toggle-button',
                  'aria-controls': aria_id,
                  'aria-expanded': 'false',
                  'aria-hidden': 'true',
                  'tabindex': '-1',
                }) %}

                <button{{ toggle_button_attributes }}>
                  <span class="visually-hidden">{{ '@title sub-navigation'|t({'@title': item.title}) }}</span>
                  <span class="icon--menu-toggle"></span>
                </button>
              {% endif %}

              {% set attributes = attributes.setAttribute('id', aria_id) %}
              {{ menus.menu_links(item.below, attributes, menu_level + 1, aria_id) }}
            {% endif %}

          {% elseif menu_item_type == 'button' %}

            {{ link(link_title, item.url, {
              'class': link_classes,
              'aria-controls': is_top_level_menu and item.below ? aria_id : false,
              'aria-expanded': is_top_level_menu and item.below ? 'false' : false,
              'data-drupal-selector': is_top_level_menu and item.below ? 'primary-nav-submenu-toggle-button' : false,
            }) }}

            {% set attributes = attributes.setAttribute('id', aria_id) %}
            {{ menus.menu_links(item.below, attributes, menu_level + 1, aria_id) }}
          {% endif %}
        </li>
      {% endfor %}
    </ul>
  {% endif %}
{% endmacro %}