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 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[:scope_count].nil? ? true : config[:scope_count]
    }
    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]) || default_index_config
end

def default_index_config
  @default_index_config ||= ::ActiveAdmin::PagePresenter.new(:as => :table) do |display|
    selectable_column
    id_column
    resource_class.content_columns.each do |col|
      column col.name.to_sym
    end
    default_actions
  end
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')
    blank_slate_content += " " + link_to(I18n.t("active_admin.blank_slate.link"), new_resource_path)
  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[:paginator].nil?      ? true : config[:paginator]
  download_links = config[:download_links].nil? ? active_admin_config.namespace.download_links : config[:download_links]
  pagination_total = config[:pagination_total].nil? ? true : config[:pagination_total]
  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,
                                   :pagination_total => pagination_total) do
    div :class => 'index_content' do
      insert_tag(renderer_class, config, collection)
    end
  end
end

def title
  case config[:title]
  when Proc then controller.instance_eval(&config[:title])
  when String then config[:title]
  else
    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