class ActiveAdmin::Views::AttributesTable

def build(obj, *attrs)
  @collection     = Array.wrap(obj)
  @resource_class = @collection.first.class
  options = {}
  options[:for] = @collection.first if single_record?
  super(options)
  @table = table
  build_colgroups
  rows(*attrs)
end

def build_colgroups
  return if single_record?
  reset_cycle(self.class.to_s)
  within @table do
    col # column for row headers
    @collection.each do |record|
      classes = Arbre::HTML::ClassList.new
      classes << cycle(:even, :odd, name: self.class.to_s)
      classes << dom_class_name_for(record)
      col(id: dom_id_for(record), class: classes)
    end
  end
end

def content_for(record, attr)
  value = helpers.format_attribute record, attr
  value.blank? && current_arbre_element.children.to_s.empty? ? empty_value : value
  # Don't add the same Arbre twice, while still allowing format_attribute to call status_tag
  current_arbre_element << value unless current_arbre_element.children.include? value
end

def default_id_for_prefix
  'attributes_table'
end

def empty_value
  span I18n.t('active_admin.empty'), class: "empty"
end

def header_content_for(attr)
  if @resource_class.respond_to?(:human_attribute_name)
    @resource_class.human_attribute_name(attr, default: attr.to_s.titleize)
  else
    attr.to_s.titleize
  end
end

def row(*args, &block)
  title   = args[0]
  options = args.extract_options!
  classes = [:row]
  if options[:class]
    classes << options[:class]
  elsif title.present?
    classes << "row-#{title.to_s.parameterize(separator: "_")}"
  end
  options[:class] = classes.join(' ')
  @table << tr(options) do
    th do
      header_content_for(title)
    end
    @collection.each do |record|
      td do
        content_for(record, block || title)
      end
    end
  end
end

def rows(*attrs)
  attrs.each { |attr| row(attr) }
end

def single_record?
  @single_record ||= @collection.size == 1
end