class ActiveAdmin::Views::Pages::Index

def any_table_tools?
  active_admin_config.batch_actions.any? ||
  active_admin_config.scopes.any? ||
  active_admin_config.page_presenters[:index].try(:size).try(:>, 1)
end

def blank_slate_link
  if config.options.has_key?(:blank_slate_link)
    blank_slate_link = config.options[:blank_slate_link]
    if blank_slate_link.is_a?(Proc)
      instance_exec(&blank_slate_link)
    end
  else
    default_blank_slate_link
  end
end

def build_batch_actions_selector
  if active_admin_config.batch_actions.any?
    insert_tag view_factory.batch_action_selector, active_admin_config.batch_actions
  end
end

def build_collection
  if items_in_collection?
    render_index
  else
    if params[:q] || params[:scope]
      render_empty_results
    else
      render_blank_slate
    end
  end
end

def build_index_list
  indexes = active_admin_config.page_presenters[:index]
  if indexes.kind_of?(Hash) && indexes.length > 1
    index_classes = []
    active_admin_config.page_presenters[:index].each do |type, page_presenter|
      index_classes << find_index_renderer_class(page_presenter[:as])
    end
    index_list_renderer index_classes
  end
end

def build_scopes
  if active_admin_config.scopes.any?
    scope_options = {
      scope_count: config.fetch(:scope_count, true)
    }
    scopes_renderer active_admin_config.scopes, scope_options
  end
end

def build_table_tools
  div class: "table_tools" do
    build_batch_actions_selector
    build_scopes
    build_index_list
  end if any_table_tools?
end

def config
  active_admin_config.get_page_presenter(:index, params[:as]) ||
  ActiveAdmin::PagePresenter.new(as: :table)
end

def default_blank_slate_link
  link_to(I18n.t("active_admin.blank_slate.link"), new_resource_path)
end

def find_index_renderer_class(klass)
  klass.is_a?(Class) ? klass :
    ::ActiveAdmin::Views.const_get("IndexAs" + klass.to_s.camelcase)
end

def items_in_collection?
  !collection_is_empty?
end

def main_content
  wrap_with_batch_action_form do
    build_table_tools
    build_collection
  end
end

def render_blank_slate
  blank_slate_content = I18n.t("active_admin.blank_slate.content", resource_name: active_admin_config.plural_resource_label)
  if controller.action_methods.include?('new') && authorized?(ActiveAdmin::Auth::CREATE, active_admin_config.resource_class)
    blank_slate_content = [blank_slate_content, blank_slate_link].compact.join(" ")
  end
  insert_tag(view_factory.blank_slate, blank_slate_content)
end

def render_empty_results
  empty_results_content = I18n.t("active_admin.pagination.empty", model: active_admin_config.plural_resource_label)
  insert_tag(view_factory.blank_slate, empty_results_content)
end

def render_index
  renderer_class = find_index_renderer_class(config[:as])
  paginator        = config.fetch(:paginator, true)
  download_links   = config.fetch(:download_links, active_admin_config.namespace.download_links)
  pagination_total = config.fetch(:pagination_total, true)
  per_page         = config.fetch(:per_page, active_admin_config.per_page)
  paginated_collection(collection, entry_name:       active_admin_config.resource_label,
                                   entries_name:     active_admin_config.plural_resource_label(count: collection_size),
                                   download_links:   download_links,
                                   paginator:        paginator,
                                   per_page:         per_page,
                                   pagination_total: pagination_total) do
    div class: 'index_content' do
      insert_tag(renderer_class, config, collection)
    end
  end
end

def title
  if Proc === config[:title]
    controller.instance_exec &config[:title]
  else
    config[:title] || assigns[:page_title] || active_admin_config.plural_resource_label
  end
end

def wrap_with_batch_action_form(&block)
  if active_admin_config.batch_actions.any?
    batch_action_form(&block)
  else
    block.call
  end
end