require 'bindata'
require 'pio/type/mac_address'

module Pio
  module OpenFlow
    # Description of a physical port
    class PhyPort < BinData::Record
      extend Flags

      # enum ofp_port_config
      flags_32bit :port_config,
                  [:port_down,
                   :no_stp,
                   :no_recv,
                   :no_recv_stp,
                   :no_flood,
                   :no_fwd,
                   :no_packet_in]

      # enum ofp_port_state
      flags_32bit :port_state,
                  link_down: 1 << 0,
                  stp_listen: 0 << 8,
                  stp_learn: 1 << 8,
                  stp_forward: 2 << 8,
                  stp_block: 3 << 8

      # enum ofp_port_features
      flags_32bit :port_feature,
                  [:port_10mb_hd,
                   :port_10mb_fd,
                   :port_100mb_hd,
                   :port_100mb_fd,
                   :port_1gb_hd,
                   :port_1gb_fd,
                   :port_10gb_fd,
                   :port_copper,
                   :port_fiber,
                   :port_autoneg,
                   :port_pause,
                   :port_pause_asym]

      endian :big

      uint16 :port_no
      mac_address :hardware_address
      string :name, length: 16, trim_padding: true
      port_config :config
      port_state :state
      port_feature :curr
      port_feature :advertised
      port_feature :supported
      port_feature :peer

      # rubocop:disable MethodLength
      def snapshot
        super.tap do |ss|
          def ss.datapath_id
            @datapath_id || fail
          end

          def ss.dpid
            @datapath_id || fail
          end

          def ss.number
            port_no
          end

          def ss.mac_address
            hardware_address
          end

          def ss.up?
            !down?
          end

          def ss.down?
            config.include?(:port_down) || state.include?(:link_down)
          end

          def ss.local?
            port_no == PortNumber::NUMBERS[:local]
          end
        end
      end
      # rubocop:enable MethodLength
    end
  end
end