module Pagy::MaterializeExtra

def pagy_materialize_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
  style   = ' style="vertical-align: middle"'
  input   = %(<input type="number" class="browser-default" min="1" max="#{p_pages}" value="#{
                p_page}" style="text-align: center; width: #{p_pages.to_s.length + 1}rem;">)
  html = %(<ul#{p_id} class="pagy-materialize-combo-nav-js pagination chip" role="navigation")
  %(#{html} aria-label="pager" style="padding-right: 0" #{
      pagy_json_attr pagy, :combo, pagy_marked_link(link)}>#{
      pagy_materialize_prev_html pagy, link, style}<li class="pagy-combo-input">#{
      pagy_t 'pagy.combo_nav_js', page_input: input, count: p_page, pages: p_pages}</li>#{
      pagy_materialize_next_html pagy, link, style}</ul>)
end

def pagy_materialize_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 = +%(<div#{p_id} class="pagy-materialize-nav pagination" role="navigation" aria-label="pager"><ul class="pagination">)
  html << pagy_materialize_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 class="waves-effect">#{link.call item}</li>)                           # page link
            when String  then %(<li class="active">#{link.call item}</li>)                                 # active page
            when :gap    then %(<li class="gap disabled"><a href="#">#{pagy_t 'pagy.nav.gap'}</a></li>)    # page gap
            else raise InternalError, "expected item types in series to be Integer, String or :gap; got #{item.inspect}"
            end
  end
  html << pagy_materialize_next_html(pagy, link)
  html << %(</ul></div>)
end

def pagy_materialize_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' => %(<ul class="pagination">#{pagy_materialize_prev_html pagy, link}),
           'link'   => %(<li class="waves-effect">#{mark = link.call(PAGE_PLACEHOLDER, LABEL_PLACEHOLDER)}</li>),
           'active' => %(<li class="active">#{mark}</li>),
           'gap'    => %(<li class="gap disabled"><a href="#">#{pagy_t 'pagy.nav.gap'}</a></li>),
           'after'  => %(#{pagy_materialize_next_html pagy, link}</ul>) }
  %(<div#{p_id} class="#{'pagy-rjs ' if sequels.size > 1}pagy-materialize-nav-js" role="navigation" aria-label="pager" #{
    pagy_json_attr(pagy, :nav, tags, sequels, pagy.label_sequels(sequels))}></div>)
end

def pagy_materialize_next_html(pagy, link, style = '')
  if (p_next = pagy.next)
    %(<li class="waves-effect next"#{style}>#{
        link.call p_next, '<i class="material-icons">chevron_right</i>', 'aria-label="next"'}</li>)
  else
    %(<li class="next disabled"#{style}><a href="#"><i class="material-icons">chevron_right</i></a></li>)
  end
end

def pagy_materialize_prev_html(pagy, link, style = '')
  if (p_prev = pagy.prev)
    %(<li class="waves-effect prev"#{style}>#{
        link.call p_prev, '<i class="material-icons">chevron_left</i>', 'aria-label="previous"'}</li>)
  else
    %(<li class="prev disabled"#{style}><a href="#"><i class="material-icons">chevron_left</i></a></li>)
  end
end