class Kuroko2::JobDefinitionStatsController

def execution_time
  set_definition
  set_period
  @logs = Kuroko2::JobInstance.where(job_definition_id: params[:job_definition_id]).
    order(created_at: :desc)
  if @start_at
    @logs = @logs.where(created_at: @start_at..@end_at)
  else
    @logs = @logs.limit(10)
  end
end

def index
  set_definition
end

def memory
  set_definition
  set_period
  target_instance = Kuroko2::JobInstance.where(job_definition_id: params[:job_definition_id])
  if @start_at
    target_instance = target_instance.where(created_at: @start_at..@end_at)
  end
  @logs = Kuroko2::MemoryConsumptionLog.joins(:job_instance).
    merge(target_instance).order(created_at: :desc)
  @logs = @logs.limit(10) unless @start_at
end

def set_definition
  @definition =  Kuroko2::JobDefinition.find(params[:job_definition_id])
end

def set_period
  @end_at   = Time.current
  @start_at =
    case params[:period]
    when /\A(\d+)d\z/
      $1.to_i.days.ago(@end_at)
    when /\A(\d+)w\z/
      $1.to_i.weeks.ago(@end_at)
    when /\A(\d+)m\z/
      $1.to_i.month.ago(@end_at)
    else
      nil
    end
end