module Pagy::UikitExtra

def pagy_uikit_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 type="number" min="1" max="#{p_pages}" value="#{
                p_page}" style="text-align: center; width: #{p_pages.to_s.length + 1}rem;">)
  %(<ul#{p_id} class="pagy-uikit-combo-nav-js uk-button-group uk-pagination uk-flex-center" #{
      pagy_json_attr pagy, :combo_nav, p_page, pagy_marked_link(link)
    }>#{
      pagy_uikit_prev_html pagy, link
    }<li>#{
      pagy_t 'pagy.combo_nav_js', page_input: input, count: p_page, pages: p_pages
    }</li>#{
      pagy_uikit_next_html pagy, link
    }</ul>)
end

def pagy_uikit_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 = +%(<ul#{p_id} class="pagy-uikit-nav uk-pagination uk-flex-center">#{pagy_uikit_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>)
            when String  then %(<li class="uk-active"><span>#{pagy.label_for(item)}</span></li>)
            when :gap    then %(<li class="uk-disabled"><span>#{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 << pagy_uikit_next_html(pagy, link)
  html << %(</ul>)
end

def pagy_uikit_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' => pagy_uikit_prev_html(pagy, link),
           'link'   => %(<li>#{link.call(PAGE_PLACEHOLDER, LABEL_PLACEHOLDER)}</li>),
           'active' => %(<li class="uk-active"><span>#{LABEL_PLACEHOLDER}</span></li>),
           'gap'    => %(<li class="uk-disabled"><span>#{pagy_t 'pagy.nav.gap'}</span></li>),
           'after'  => pagy_uikit_next_html(pagy, link) }
  %(<ul#{p_id} class="pagy-njs pagy-uikit-nav-js uk-pagination uk-flex-center" #{
    pagy_json_attr(pagy, :nav, tags, (sequels = pagy.sequels(**vars)), pagy.label_sequels(sequels))}></ul>)
end

def pagy_uikit_next_html(pagy, link)
  next_span = %(<span uk-pagination-next>#{pagy_t 'pagy.nav.next'}</span>)
  if (p_next = pagy.next)
    %(<li>#{link.call p_next, next_span}</li>)
  else
    %(<li class="uk-disabled"><a href="#">#{next_span}</a></li>)
  end
end

def pagy_uikit_prev_html(pagy, link)
  previous_span = %(<span uk-pagination-previous>#{pagy_t 'pagy.nav.prev'}</span>)
  if (p_prev = pagy.prev)
    %(<li>#{link.call p_prev, previous_span}</li>)
  else
    %(<li class="uk-disabled"><a href="#">#{previous_span}</a></li>)
  end
end