Indexes.define :products do

  mappings do
    properties :name, :category, :shop_id, :price, :currency, :product_suggestions
    _parent type: 'shop'
  end

  serializer do |record|
    set record, :name, :category, :shop_id, :price, :currency
    product_suggestions do
      input [record.name, transliterate(record.name)].uniq
      output record.name
      context do
        shop_id [record.shop_id.to_s, 'all'].compact
      end
    end
  end

  search do |*args|
    options = args.extract_options!
    shop = options[:shop]
    term = args.first
    query do
      filtered do
        filter do
          bool do
            must do
              if shop
                term do
                  _parent shop.id
                end
              end
            end
          end
        end
        query do
          if term.present?
            multi_match do
              query term
              type 'phrase_prefix'
              fields %w(name category)
            end
          else
            match_all
          end
        end
      end
    end
  end

end