# See the Pagy documentation: https://ddnexus.github.io/pagy/extras/bootstrap
# frozen_string_literal: true

require 'pagy/extras/shared'

class Pagy
  module Frontend

    # Pagination for bootstrap: it returns the html with the series of links to the pages
    def pagy_bootstrap_nav(pagy, pagy_id: nil, link_extra: '')
      p_id = %( id="#{pagy_id}") if pagy_id
      link = pagy_link_proc(pagy, link_extra: %(class="page-link" #{link_extra}))

      html = +%(<nav#{p_id} class="pagy-bootstrap-nav" aria-label="pager"><ul class="pagination">)
      html << pagy_bootstrap_prev_html(pagy, link)
      pagy.series.each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
        html << case item
                when Integer then %(<li class="page-item">#{link.call item}</li>)
                when String  then %(<li class="page-item active">#{link.call item}</li>)
                when :gap    then %(<li class="page-item gap disabled"><a href="#" class="page-link">#{pagy_t 'pagy.nav.gap'}</a></li>)
                end
      end
      html << pagy_bootstrap_next_html(pagy, link)
      html << %(</ul></nav>)
    end

    # Javascript pagination for bootstrap: it returns a nav and a JSON tag used by the Pagy.nav javascript
    def pagy_bootstrap_nav_js(pagy, deprecated_id=nil, pagy_id: nil, link_extra: '', steps: nil)
      pagy_id = Pagy.deprecated_arg(:id, deprecated_id, :pagy_id, pagy_id) if deprecated_id
      p_id = %( id="#{pagy_id}") if pagy_id
      link = pagy_link_proc(pagy, link_extra: %(class="page-link" #{link_extra}))
      tags = { 'before' => %(<ul class="pagination">#{pagy_bootstrap_prev_html pagy, link}),
               'link'   => %(<li class="page-item">#{mark = link.call(PAGE_PLACEHOLDER)}</li>),
               'active' => %(<li class="page-item active">#{mark}</li>),
               'gap'    => %(<li class="page-item gap disabled"><a href="#" class="page-link">#{pagy_t 'pagy.nav.gap'}</a></li>),
               'after'  => %(#{pagy_bootstrap_next_html pagy, link}</ul>) }

      %(<nav#{p_id} class="pagy-njs pagy-bootstrap-nav-js" aria-label="pager" #{pagy_json_attr(pagy, :nav, tags, pagy.sequels(steps))}></nav>)
    end

    # Javascript combo pagination for bootstrap: it returns a nav and a JSON tag used by the Pagy.combo_nav javascript
    def pagy_bootstrap_combo_nav_js(pagy, deprecated_id=nil, pagy_id: nil, link_extra: '')
      pagy_id = Pagy.deprecated_arg(:id, deprecated_id, :pagy_id, pagy_id) if deprecated_id
      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}" class="text-primary" style="padding: 0; border: none; text-align: center; width: #{p_pages.to_s.length+1}rem;">)

      %(<nav#{p_id} class="pagy-bootstrap-combo-nav-js pagination" aria-label="pager"><div class="btn-group" role="group" #{
          pagy_json_attr pagy, :combo_nav, p_page, pagy_marked_link(link)
      }>#{
          if (p_prev = pagy.prev)
            link.call p_prev, pagy_t('pagy.nav.prev'), 'aria-label="previous" class="prev btn btn-primary"'
          else
            %(<a class="prev btn btn-primary disabled" href="#">#{pagy_t('pagy.nav.prev')}</a>)
          end
      }<div class="pagy-combo-input btn btn-primary disabled" style="white-space: nowrap;">#{pagy_t 'pagy.combo_nav_js', page_input: input, count: p_page, pages: p_pages}</div>#{
          if (p_next  = pagy.next)
            link.call p_next, pagy_t('pagy.nav.next'), 'aria-label="next" class="next btn btn-primary"'
          else
            %(<a class="next btn btn-primary disabled" href="#">#{pagy_t 'pagy.nav.next' }</a>)
          end
      }</div></nav>)
    end

    private

      def pagy_bootstrap_prev_html(pagy, link)
        if (p_prev = pagy.prev)
          %(<li class="page-item prev">#{link.call p_prev, pagy_t('pagy.nav.prev'), 'aria-label="previous"'}</li>)
        else
          %(<li class="page-item prev disabled"><a href="#" class="page-link">#{pagy_t 'pagy.nav.prev'}</a></li>)
        end
      end

      def pagy_bootstrap_next_html(pagy, link)
        if (p_next = pagy.next)
          %(<li class="page-item next">#{link.call p_next, pagy_t('pagy.nav.next'), 'aria-label="next"'}</li>)
        else
          %(<li class="page-item next disabled"><a href="#" class="page-link">#{pagy_t 'pagy.nav.next'}</a></li>)
        end
      end

  end
end