{% if parent_page is undefined %}
  {% set parent_page = currentpage %}
{% endif %}
{% if depth is undefined %}
  {% set depth = 5 %}
{% endif %}

{% if parent_page.funnel is undefined %}
  {% set parent_level = "home" %}
  {% set level_2 = "funnel" %}
  {% set level_3 = "doc_type" %}
  {% set childpages = pages %}{# special case for home #}
{% elif parent_page == pages|selectattr("funnel", "equalto", parent_page.funnel)|first %}
  {% set parent_level = "funnel" %}
  {% set level_2 = "doc_type" %}
  {% set level_3 = "category" %}
{% elif parent_page == pages|selectattr("doc_type", "equalto", parent_page.doc_type)|first %}
  {% set parent_level = "doc_type" %}
  {% set level_2 = "category" %}
  {% set level_3 = "subcategory" %}
{% elif parent_page == pages|selectattr("category", "equalto", parent_page.category)|first %}
  {% set parent_level = "category" %}
  {% set level_2 = "subcategory" %}
  {% set level_3 = None %}
{% elif parent_page == pages|selectattr("subcategory", "equalto", parent_page.subcategory)|first %}
  {% set parent_level = "subcategory" %}
  {% set level_2 = None %}
  {% set level_3 = None %}
{% else %}
  <!-- TEMPLATE ERROR: page {{parent_page.name}} is not the parent of anything? -->
{% endif %}
<!-- parent_level is {{parent_level}} -->
{% if parent_level != "home" %}
  {% set childpages = pages|selectattr(parent_level, "equalto", parent_page[parent_level])|list %}
{% endif %}

<div class="children-display">
  <ul>
    {% set printed_level2s = [] %}
    {% for page in childpages %}
      {% if page == parent_page %}{# skip parent #}
      {% elif level_2 == None or page[level_2] is undefined %}
        <li class="level-1"><a href="{{page.html}}">{{page.name}}</a></li>
      {% elif page[level_2] is defined %}
        {% if page[level_2] not in printed_level2s %}
          {% set printed_level3s = [] %}
          {% set subpages = childpages|selectattr(level_2, "equalto", page[level_2])|list %}
          {% for subpage in subpages %}
            {% if loop.index == 1 %}
              <li class="level-1"><a href="{{subpage.html}}">{{subpage.name}}</a></li>
            {% else %}
              {% if depth > 1 %}
                {% if level_3 == None or subpage[level_3] is undefined %}
                  <li class="level-2"><a href="{{subpage.html}}">{{subpage.name}}</a></li>
                {% elif subpage[level_3] is defined %}
                  {% if subpage[level_3] not in printed_level3s %}
                    {% for subsubpage in subpages|selectattr(level_3, "equalto", subpage[level_3])|list %}
                      {% if loop.index == 1 %}
                        <li class="level-2"><a href="{{subsubpage.html}}">{{subsubpage.name}}</a></li>
                      {% elif depth > 2 %}
                        <li class="level-3"><a href="{{subsubpage.html}}">{{subsubpage.name}}</a></li>
                      {% endif %}
                    {% endfor %}
                    {% set _ = printed_level3s.append(subpage[level_3]) %}
                  {% endif %}
                {% endif %}

              {% endif %}
            {% endif %}
          {% endfor %}
          {% set _ = printed_level2s.append(page[level_2]) %}
        {% endif %}
      {% else %}
        <!-- TEMPLATE warning: else case -->
      {% endif %}
    {% endfor %}
  </ul>
</div>