module GdsApi::TestHelpers::Worldwide

def stub_worldwide_api_has_locations(location_slugs)
  location_slugs.each { |s| stub_worldwide_api_has_location(s) }
  pages = []
  location_slugs.each_slice(20) do |slugs|
    pages << slugs.map { |s| world_location_details_for_slug(s) }
  end
  pages.each_with_index do |page, i|
    page_details = plural_response_base.merge(
      "results" => page,
      "total" => location_slugs.size,
      "pages" => pages.size,
      "current_page" => i + 1,
      "page_size" => 20,
      "start_index" => i * 20 + 1,
    )
    links = { self: "#{WORLDWIDE_API_ENDPOINT}/api/world-locations?page=#{i + 1}" }
    links[:next] = "#{WORLDWIDE_API_ENDPOINT}/api/world-locations?page=#{i + 2}" if pages[i + 1]
    links[:previous] = "#{WORLDWIDE_API_ENDPOINT}/api/world-locations?page=#{i}" unless i.zero?
    page_details["_response_info"]["links"] = []
    link_headers = []
    links.each do |rel, href|
      page_details["_response_info"]["links"] << { "rel" => rel, "href" => href }
      link_headers << "<#{href}>; rel=\"#{rel}\""
    end
    stub_request(:get, links[:self])
      .to_return(status: 200, body: page_details.to_json, headers: { "Link" => link_headers.join(", ") })
    next unless i.zero?
    # First page exists at URL with and without page param
    stub_request(:get, links[:self].sub(/\?page=1/, ""))
      .to_return(status: 200, body: page_details.to_json, headers: { "Link" => link_headers.join(", ") })
  end
end