module Pagy::BulmaExtra

def pagy_bulma_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" type="number" min="1" max="#{p_pages}" value="#{
                p_page}" style="padding: 0; text-align: center; width: #{p_pages.to_s.length + 1}rem; margin:0 0.3rem;">)
  html = %(<nav#{p_id} class="pagy-bulma-combo-nav-js" aria-label="pagination">)
  %(#{html}<div class="field is-grouped is-grouped-centered" role="group" #{
      pagy_json_attr pagy, :combo_nav, pagy_marked_link(link)}>#{
      if (p_prev  = pagy.prev)
        %(<p class="control">#{link.call p_prev, pagy_t('pagy.nav.prev'), 'class="button" aria-label="previous page"'}</p>)
      else
        %(<p class="control"><a class="button" disabled>#{pagy_t 'pagy.nav.prev'}</a></p>)
      end
    }<div class="pagy-combo-input control level is-mobile">#{
      pagy_t 'pagy.combo_nav_js', page_input: input, count: p_page, pages: p_pages}</div>#{
      if (p_next  = pagy.next)
        %(<p class="control">#{link.call p_next, pagy_t('pagy.nav.next'), 'class="button" aria-label="next page"'}</p>)
      else
        %(<p class="control"><a class="button" disabled>#{pagy_t 'pagy.nav.next'}</a></p>)
      end
    }</div></nav>)
end

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

def pagy_bulma_nav_js(pagy, pagy_id: nil, link_extra: '', **vars)
  sequels = pagy.sequels(**vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra: link_extra)
  tags = { 'before' => %(#{pagy_bulma_prev_next_html(pagy, link)}<ul class="pagination-list">),
           'link'   => %(<li>#{link.call PAGE_PLACEHOLDER, LABEL_PLACEHOLDER,
                                         %(class="pagination-link" aria-label="goto page #{PAGE_PLACEHOLDER}")}</li>),
           'active' => %(<li>#{link.call PAGE_PLACEHOLDER, LABEL_PLACEHOLDER,
                                         %(class="pagination-link is-current" aria-current="page" aria-label="page #{
                                             PAGE_PLACEHOLDER}")}</li>),
           'gap'    => %(<li><span class="pagination-ellipsis">#{pagy_t 'pagy.nav.gap'}</span></li>),
           'after'  => '</ul>' }
  %(<nav#{p_id} class="#{'pagy-rjs ' if sequels.size > 1}pagy-bulma-nav-js pagination is-centered" aria-label="pagination" #{
    pagy_json_attr(pagy, :nav, tags, sequels, pagy.label_sequels(sequels))}></nav>)
end

def pagy_bulma_prev_next_html(pagy, link)
  html = +if (p_prev = pagy.prev)
            link.call p_prev, pagy_t('pagy.nav.prev'), 'class="pagination-previous" aria-label="previous page"'
          else
            %(<a class="pagination-previous" disabled>#{pagy_t 'pagy.nav.prev'}</a>)
          end
  html << if (p_next = pagy.next)
            link.call p_next, pagy_t('pagy.nav.next'), 'class="pagination-next" aria-label="next page"'
          else
            %(<a class="pagination-next" disabled>#{pagy_t 'pagy.nav.next'}</a>)
          end
end