module Pagy::BootstrapExtra

def bootstrap_next_html(pagy, a)
  if (p_next = pagy.next)
    %(<li class="page-item next">#{
        a.(p_next, pagy_t('pagy.next'), classes: 'page-link', aria_label: pagy_t('pagy.aria_label.next'))}</li>)
  else
    %(<li class="page-item next disabled"><a role="link" class="page-link" aria-disabled="true" aria-label="#{
        pagy_t('pagy.aria_label.next')}">#{pagy_t('pagy.next')}</a></li>)
  end
end

def bootstrap_prev_html(pagy, a)
  if (p_prev = pagy.prev)
    %(<li class="page-item prev">#{
        a.(p_prev, pagy_t('pagy.prev'), classes: 'page-link', aria_label: pagy_t('pagy.aria_label.prev'))}</li>)
  else
    %(<li class="page-item prev disabled"><a role="link" class="page-link" aria-disabled="true" aria-label="#{
        pagy_t('pagy.aria_label.prev')}">#{pagy_t('pagy.prev')}</a></li>)
  end
end

def pagy_bootstrap_combo_nav_js(pagy, id: nil, classes: 'pagination', aria_label: nil, **vars)
  id    = %( id="#{id}") if id
  a     = pagy_anchor(pagy, **vars)
  pages = pagy.pages
  page_input = %(<input name="page" type="number" min="1" max="#{pages}" value="#{pagy.page}" aria-current="page" ) <<
               %(style="text-align: center; width: #{pages.to_s.length + 1}rem; padding: 0; ) <<
               %(border: none; display: inline-block;" class="page-link active">#{JSTools::A_TAG})
  %(<nav#{id} class="pagy-bootstrap combo-nav-js" #{
      nav_aria_label(pagy, aria_label:)} #{
      pagy_data(pagy, :combo, pagy_url_for(pagy, PAGE_TOKEN, **vars))
    }><ul class="#{classes}">#{
      bootstrap_prev_html(pagy, a)
    }<li class="page-item pagy-bootstrap"><label class="page-link">#{
      pagy_t('pagy.combo_nav_js', page_input:, pages:)
    }</label></li>#{
      bootstrap_next_html(pagy, a)
    }</ul></nav>)
end

def pagy_bootstrap_nav(pagy, id: nil, classes: 'pagination', aria_label: nil, **vars)
  id = %( id="#{id}") if id
  a  = pagy_anchor(pagy, **vars)
  html = %(<nav#{id} class="pagy-bootstrap nav" #{nav_aria_label(pagy, aria_label:)}><ul class="#{classes}">#{
             bootstrap_prev_html(pagy, a)})
  pagy.series(**vars).each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
    html << case item
            when Integer
              %(<li class="page-item">#{a.(item, classes: 'page-link')}</li>)
            when String
              %(<li class="page-item active"><a role="link" class="page-link" aria-current="page" aria-disabled="true">#{
                  pagy.label_for(item)}</a></li>)
            when :gap
              %(<li class="page-item gap disabled"><a role="link" class="page-link" aria-disabled="true">#{
                  pagy_t('pagy.gap')}</a></li>)
            else raise InternalError, "expected item types in series to be Integer, String or :gap; got #{item.inspect}"
            end
  end
  html << %(#{bootstrap_next_html(pagy, a)}</ul></nav>)
end

def pagy_bootstrap_nav_js(pagy, id: nil, classes: 'pagination', aria_label: nil, **vars)
  sequels = pagy.sequels(**vars)
  id      = %( id="#{id}") if id
  a       = pagy_anchor(pagy, **vars)
  tokens  = { 'before'  => %(<ul class="#{classes}">#{bootstrap_prev_html(pagy, a)}),
              'a'       => %(<li class="page-item">#{a.(PAGE_TOKEN, LABEL_TOKEN, classes: 'page-link')}</li>),
              'current' => %(<li class="page-item active"><a role="link" class="page-link" ) +
                           %(aria-current="page" aria-disabled="true">#{LABEL_TOKEN}</a></li>),
              'gap'     => %(<li class="page-item gap disabled"><a role="link" class="page-link" aria-disabled="true">#{
                               pagy_t('pagy.gap')}</a></li>),
              'after'   => %(#{bootstrap_next_html pagy, a}</ul>) }
  %(<nav#{id} class="#{'pagy-rjs ' if sequels.size > 1}pagy-bootstrap nav-js" #{
      nav_aria_label(pagy, aria_label:)} #{
      pagy_data(pagy, :nav, tokens, sequels, pagy.label_sequels(sequels))
    }></nav>)
end