module GdsApi::TestHelpers::Organisations

def organisations_api_has_organisations(organisation_slugs)
  organisation_slugs.each {|s| organisations_api_has_organisation(s) }
  pages = []
  organisation_slugs.each_slice(20) do |slugs|
    pages << slugs.map {|s| organisation_details_for_slug(s) }
  end
  pages.each_with_index do |page, i|
    page_details = plural_response_base.merge({
      "results" => page,
      "total" => organisation_slugs.size,
      "pages" => pages.size,
      "current_page" => i + 1,
      "page_size" => 20,
      "start_index" => i * 20 + 1,
    })
    links = {:self => "#{ORGANISATIONS_API_ENDPOINT}/api/organisations?page=#{i + 1}" }
    links[:next] = "#{ORGANISATIONS_API_ENDPOINT}/api/organisations?page=#{i + 2}" if pages[i+1]
    links[:previous] = "#{ORGANISATIONS_API_ENDPOINT}/api/organisations?page=#{i}" unless i == 0
    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(", ")})
    if i == 0
      # 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
end