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

require 'pagy/extras/shared'

class Pagy
  module Frontend

    # Pagination for Bulma: it returns the html with the series of links to the pages
    def pagy_bulma_nav(pagy, pagy_id: nil, link_extra: '')
      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" role="navigation" aria-label="pagination">)
      html << pagy_bulma_prev_next_html(pagy, link)
      html << %(<ul class="pagination-list">)
      pagy.series.each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
        html << case item
                when Integer then %(<li>#{link.call item, item, %(class="pagination-link" aria-label="goto page #{item}") }</li>)                           # page link
                when String  then %(<li>#{link.call item, item, %(class="pagination-link is-current" aria-label="page #{item}" aria-current="page")}</li>)  # active page
                when :gap    then %(<li><span class="pagination-ellipsis">#{pagy_t 'pagy.nav.gap'}</span></li>)                                            # page gap
                end
      end
      html << %(</ul></nav>)
    end

    def pagy_bulma_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: link_extra)
      tags = { 'before' => %(#{pagy_bulma_prev_next_html(pagy, link)}<ul class="pagination-list">),
               'link'   => %(<li>#{link.call PAGE_PLACEHOLDER, PAGE_PLACEHOLDER, %(class="pagination-link" aria-label="goto page #{PAGE_PLACEHOLDER}")}</li>),
               'active' => %(<li>#{link.call PAGE_PLACEHOLDER, PAGE_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>' }

      html = %(<nav#{p_id} class="pagy-njs pagy-bulma-nav-js pagination is-centered" role="navigation" aria-label="pagination"></nav>)
      html << pagy_json_tag(pagy, :nav, tags, pagy.sequels(steps))
    end

    # Javascript combo pagination for Bulma: it returns a nav and a JSON tag used by the Pagy.combo_nav javascript
    def pagy_bulma_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 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;">)

      %(<nav#{p_id} class="pagy-bulma-combo-nav-js" role="navigation" aria-label="pagination"><div class="field is-grouped is-grouped-centered" role="group">#{
          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>#{
         pagy_json_tag pagy, :combo_nav, p_page, pagy_marked_link(link)
      })
    end

    private

      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

  end
end