Resque::Server.helpers do
  ####################
  #failed.erb helpers#
  ####################

  def failed_date_format
    "%Y/%m/%d %T %z"
  end

  def failed_multiple_queues?
    return @multiple_failed_queues if defined?(@multiple_failed_queues)

    @multiple_failed_queues = Resque::Failure.queues.size > 1 ||
      (defined?(Resque::Failure::RedisMultiQueue) && Resque::Failure.backend == Resque::Failure::RedisMultiQueue)
  end

  def failed_size
    @failed_size ||= Resque::Failure.count(params[:queue], params[:class])
  end

  def failed_per_page
    @failed_per_page = if params[:class]
      failed_size
    else
      20
    end
  end

  def failed_start_at
    params[:start].to_i
  end

  def failed_end_at
    if failed_start_at + failed_per_page > failed_size
      failed_size
    else
      failed_start_at  + failed_per_page - 1
    end
  end

  def failed_order
    params[:order] || 'desc'
  end

  def failed_class_counts(queue = params[:queue])
    classes = Hash.new(0)
    Resque::Failure.each(0, Resque::Failure.count(queue), queue) do |_, item|
      class_name = item['payload']['class'] if item['payload']
      class_name ||= "nil"
      classes[class_name] += 1
    end
    classes
  end

  def page_entries_info(start, stop, size, name = nil)
    if size == 0
      name ? "No #{name}s" : '<b>0</b>'
    elsif size == 1
      'Showing <b>1</b>' + (name ? " #{name}" : '')
    elsif size > failed_per_page
      "Showing #{start}-#{stop} of <b>#{size}</b>" + (name ? " #{name}s" : '')
    else
      "Showing #{start} to <b>#{size - 1}</b>" + (name ? " #{name}s" : '')
    end
  end
end