require 'objspace'
module ServState
  class ServicesManager
    class << self
      def start
        @usage = UsageManager.new
        LogManager.start

        @@services_thread = Thread.new do # thread for calculate cpu and network load and other long time operations 
          while true
            @usage.update
            average_down = @usage.network_speed.map { |key, n| n[0] }.inject(:+)
            average_up   = @usage.network_speed.map { |key, n| n[1] }.inject(:+)
            LogManager.update({ cpu:  @usage.cpu_stat, 
                                ram:  @usage.ram_usage[:ram_per],
                                down: average_down,
                                up:   average_up })
            GC.start
            sleep(5)
          end
        end
      end

      def json_for_dashboard
        { cpu:         @usage.cpu_stat,
          uptime:      @usage.uptime,
          mem_usage:   @usage.ram_usage,
          disks_usage: @usage.disk_usage,
          interfaces:  @usage.interfaces, 
          network:     @usage.network_speed }.to_json
      end

      def json_for_charts(type)
        LogManager.data(type).to_json
      end

      def hostname
        @usage.hostname
      end
    end
  end
end