{% from "@components/usa-pagination/src/includes/_pagination-button.twig" import paginationButton %}

{% set pager_ranges = {
    'default': range(pagination.current - 1, pagination.current + 1),
    'last_item': pagination.items,
    'first_five': range(1, 5),
    'last_five': range(pagination.items - 4, pagination.items),
  }
%}

{% set pager_button_opts = {
  'current': pagination.current,
  'total': pagination.items,
  'aria_labels': {
    'page_label': pagination.page_label,
    'previous': pagination.previous.label,
    'next': pagination.next.label,
    'last': pagination.last_item.label
    }
} %}

{# Page numbers #}
{# List all items if less than 7 #}
{% if pagination.items <= 7 %}
  {% for item in 1..pagination.items  %}
    {{ paginationButton(item, pager_button_opts) }}
  {% endfor %}
{# User is at the start of a long dataset #}
{# Example: 1, 2, 3, *4*, 5 … 8 #}
{# Doesn't apply when user gets to 5 of 8 #}
{% elseif pagination.current <= 4 and pagination.items >= 7 %}
  {% for item in pager_ranges.first_five  %}
    {{ paginationButton(item, pager_button_opts) }}
  {% endfor %}

  {{ overflow | trim | raw }}

  {{ paginationButton(pager_ranges.last_item, pager_button_opts) }}

{# When user is close to the end of dataset #}
{# Example: 1 … 4, *5*, 6, 7, 8 #}
{% elseif pagination.current >= pagination.items - 3 %}
  {{ paginationButton(1, pager_button_opts) }}

  {{ overflow | trim | raw }}

  {% for item in pager_ranges.last_five %}
    {{ paginationButton(item, pager_button_opts) }}
  {% endfor %}
{# Default case: Current - 1, Current, Current + 1 #}
{# Example: 1 … 21, *22*, 23 … 50 #}
{# Example: 1 … 4, *5*, 6 … 9 #}
{% else %}
  {{ paginationButton(1, pager_button_opts) }}

  {{ overflow | trim | raw }}

  {% for item in pager_ranges.default %}
    {{ paginationButton(item, pager_button_opts) }}
  {% endfor %}

  {{ overflow | trim | raw }}

  {{ paginationButton(pager_ranges.last_item, pager_button_opts) }}
{% endif %}