module Pagy::BulmaExtra

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

def pagy_bulma_combo_nav_js(pagy, pagy_id: nil, link_extra: '',
                            nav_aria_label: nil, nav_i18n_key: nil)
  p_id    = %( id="#{pagy_id}") if pagy_id
  link    = pagy_link_proc(pagy, 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;" aria-current="page">)
  html = %(<nav#{p_id} class="pagy-bulma-combo-nav-js #{DEFAULT[:bulma_nav_classes]}" #{
            nav_aria_label_attr(pagy, nav_aria_label, nav_i18n_key)}>)
  %(#{html}<div class="field is-grouped is-grouped-centered" role="group" #{
      pagy_data(pagy, :combo, pagy_marked_link(link))}>#{
      if (p_prev  = pagy.prev)
        %(<p class="control">#{link.call(p_prev, pagy_t('pagy.prev'), %(class="button" #{prev_aria_label_attr}))}</p>)
      else
        %(<p class="control"><a class="button" disabled aria-disabled="true" #{
            prev_aria_label_attr}>#{pagy_t 'pagy.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.next'), %(class="button" #{next_aria_label_attr}))}</p>)
      else
        %(<p class="control"><a class="button" disabled aria-disabled="true"#{
            next_aria_label_attr}>#{pagy_t 'pagy.next'}</a></p>)
      end
    }</div></nav>)
end

def pagy_bulma_nav(pagy, pagy_id: nil, link_extra: '',
                   nav_aria_label: nil, nav_i18n_key: nil, **vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra:)
  html = +%(<nav#{p_id} class="pagy-bulma-nav pagination #{DEFAULT[:bulma_nav_classes]}" #{
              nav_aria_label_attr(pagy, nav_aria_label, nav_i18n_key)}>)
  html << 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"))}</li>)
            when String
              %(<li>#{link.call(item, pagy.label_for(item), %(class="pagination-link is-current"))}</li>)
            when :gap
              %(<li><span class="pagination-ellipsis">#{pagy_t 'pagy.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: '',
                      nav_aria_label: nil, nav_i18n_key: nil, **vars)
  sequels = pagy.sequels(**vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra:)
  tags = { 'before' => %(#{bulma_prev_next_html(pagy, link)}<ul class="pagination-list">),
           'link'   => %(<li>#{link.call(PAGE_PLACEHOLDER, LABEL_PLACEHOLDER, %(class="pagination-link"))}</li>),
           'active' => %(<li>#{link.call(PAGE_PLACEHOLDER, LABEL_PLACEHOLDER, %(class="pagination-link is-current"))}</li>),
           'gap'    => %(<li><span class="pagination-ellipsis">#{pagy_t 'pagy.gap'}</span></li>),
           'after'  => '</ul>' }
  %(<nav#{p_id} class="#{'pagy-rjs ' if sequels.size > 1}pagy-bulma-nav-js pagination #{DEFAULT[:bulma_nav_classes]}" #{
    nav_aria_label_attr(pagy, nav_aria_label, nav_i18n_key)}#{
    pagy_data(pagy, :nav, tags, sequels, pagy.label_sequels(sequels))}></nav>)
end