# frozen_string_literal: true

require 'base64'

xml.instruct!(:xml, encoding: "UTF-8")

xml.feed("xmlns" => "http://www.w3.org/2005/Atom",
         "xmlns:opensearch" => "http://a9.com/-/spec/opensearch/1.1/") do
  xml.title t('blacklight.search.page_title.title', constraints: render_search_to_page_title(params), application_name: application_name)
  # an author is required, so we'll just use the app name
  xml.author { xml.name application_name }

  xml.link    "rel" => "self", "href" => url_for(search_state.to_h.merge(only_path: false))
  xml.link    "rel" => "alternate", "href" => url_for(search_state.to_h.merge(only_path: false, format: :html)), "type" => "text/html"
  xml.id      url_for(search_state.to_h.merge(only_path: false, format: :html, content_format: nil, "type" => "text/html"))

  # Navigational and context links

  xml.link("rel" => "next",
           "href" => url_for(search_state.to_h.merge(only_path: false, page: @response.next_page.to_s))) if @response.next_page

  xml.link("rel" => "previous",
           "href" => url_for(search_state.to_h.merge(only_path: false, page: @response.prev_page.to_s))) if @response.prev_page

  xml.link("rel" => "first",
           "href" => url_for(search_state.to_h.merge(only_path: false, page: "1")))

  xml.link("rel" => "last",
           "href" => url_for(search_state.to_h.merge(only_path: false, page: @response.total_pages.to_s)))

  # "search" doesn't seem to actually be legal, but is very common, and
  # used as an example in opensearch docs
  xml.link("rel" => "search",
           "type" => "application/opensearchdescription+xml",
           "href" => url_for(controller: 'catalog', action: 'opensearch', format: 'xml', only_path: false))

  # opensearch response elements
  xml.opensearch :totalResults, @response.total.to_s
  xml.opensearch :startIndex, @response.start.to_s
  xml.opensearch :itemsPerPage, @response.limit_value
  xml.opensearch :Query, role: "request", searchTerms: params[:q], startPage: @response.current_page

  # updated is required, for now we'll just set it to now, sorry
  xml.updated Time.current.iso8601

  @response.documents.each_with_index do |document, document_counter|
    xml << render_xml_partials(document,
                               blacklight_config.view_config(:atom).partials,
                               document_counter: document_counter)
  end
end