module Pagy::FoundationExtra

def pagy_foundation_combo_nav_js(pagy, pagy_id: nil, link_extra: '')
  p_id    = %( id="#{pagy_id}") if pagy_id
  link    = pagy_link_proc(pagy, link_extra: link_extra)
  p_page  = pagy.page
  p_pages = pagy.pages
  input   = %(<input class="input-group-field cell shrink" type="number" min="1" max="#{
                p_pages}" value="#{p_page}" style="width: #{
                p_pages.to_s.length + 1}rem; padding: 0 0.3rem; margin: 0 0.3rem;">)
  %(<nav#{p_id} class="pagy-foundation-combo-nav-js" aria-label="Pagination"><div class="input-group" #{
      pagy_json_attr pagy, :combo_nav, p_page, pagy_marked_link(link)}>#{
      if (p_prev  = pagy.prev)
        link.call p_prev, pagy_t('pagy.nav.prev'),
                  'style="margin-bottom: 0" aria-label="previous" class="prev button primary"'
      else
        %(<a style="margin-bottom: 0" class="prev button primary disabled" href="#">#{pagy_t 'pagy.nav.prev'}</a>)
      end
    }<span class="input-group-label">#{pagy_t 'pagy.combo_nav_js', page_input: input, count: p_page, pages: p_pages}</span>#{
      if (p_next  = pagy.next)
        link.call p_next, pagy_t('pagy.nav.next'), 'style="margin-bottom: 0" aria-label="next" class="next button primary"'
      else
        %(<a style="margin-bottom: 0" class="next button primary disabled" href="#">#{pagy_t 'pagy.nav.next'}</a>)
      end
    }</div></nav>)
end

def pagy_foundation_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-foundation-nav" aria-label="Pagination"><ul class="pagination">)
  html << pagy_foundation_prev_html(pagy, link)
  pagy.series(**vars).each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
    html << case item
            when Integer then %(<li>#{link.call item}</li>)                        # page link
            when String  then %(<li class="current">#{pagy.label_for(item)}</li>)                  # active page
            when :gap    then %(<li class="ellipsis gap" aria-hidden="true"></li>) # page gap
            else raise InternalError, "expected item types in series to be Integer, String or :gap; got #{item.inspect}"
            end
  end
  html << pagy_foundation_next_html(pagy, link)
  html << %(</ul></nav>)
end

def pagy_foundation_nav_js(pagy, pagy_id: nil, link_extra: '', **vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra: link_extra)
  tags = { 'before' => %(<ul class="pagination">#{pagy_foundation_prev_html pagy, link}),
           'link'   => %(<li>#{link.call(PAGE_PLACEHOLDER, LABEL_PLACEHOLDER)}</li>),
           'active' => %(<li class="current">#{LABEL_PLACEHOLDER}</li>),
           'gap'    => %(<li class="ellipsis gap" aria-hidden="true"></li>),
           'after'  => %(#{pagy_foundation_next_html pagy, link}</ul>) }
  %(<nav#{p_id} class="pagy-njs pagy-foundation-nav-js" aria-label="Pagination" #{
    pagy_json_attr(pagy, :nav, tags, (sequels = pagy.sequels(**vars)), pagy.label_sequels(sequels))}></nav>)
end

def pagy_foundation_next_html(pagy, link)
  if (p_next = pagy.next)
    %(<li class="next">#{link.call p_next, pagy_t('pagy.nav.next'), 'aria-label="next"'}</li>)
  else
    %(<li class="next disabled">#{pagy_t 'pagy.nav.next'}</li>)
  end
end

def pagy_foundation_prev_html(pagy, link)
  if (p_prev = pagy.prev)
    %(<li class="prev">#{link.call p_prev, pagy_t('pagy.nav.prev'), 'aria-label="previous"'}</li>)
  else
    %(<li class="prev disabled">#{pagy_t 'pagy.nav.prev'}</li>)
  end
end