module Pagy::BulmaExtra

def pagy_bulma_nav(pagy, pagy_id: nil, link_extra: '', **vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra: link_extra)
  html = +%(<nav#{p_id} class="pagy-bulma-nav pagination is-centered" aria-label="pagination">)
  html << pagy_bulma_prev_next_html(pagy, link)
  html << %(<ul class="pagination-list">)
  pagy.series(**vars).each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
    html << case item
            when Integer
              %(<li>#{link.call item, pagy.label_for(item), %(class="pagination-link" aria-label="goto page #{item}")}</li>)
            when String
              %(<li>#{link.call item, pagy.label_for(item),
                                %(class="pagination-link is-current" aria-label="page #{item}" aria-current="page")}</li>)
            when :gap
              %(<li><span class="pagination-ellipsis">#{pagy_t 'pagy.nav.gap'}</span></li>)
            else raise InternalError, "expected item types in series to be Integer, String or :gap; got #{item.inspect}"
            end
  end
  html << %(</ul></nav>)
end