defmodule Microwaveprop.Commercial.SnmpClientTest do
  use ExUnit.Case, async: true

  alias Microwaveprop.Commercial.SnmpClient

  @af11x_output """
  iso.3.6.1.4.1.41112.1.3.2.1.11.1 = INTEGER: -55
  iso.3.6.1.4.1.41112.1.3.2.1.14.1 = INTEGER: -56
  iso.3.6.1.4.1.41112.1.3.1.1.9.1 = INTEGER: 20
  iso.3.6.1.4.1.41112.1.3.2.1.2.1 = INTEGER: 6
  iso.3.6.1.4.1.41112.1.3.2.1.18.1 = INTEGER: 6
  iso.3.6.1.4.1.41112.1.3.2.1.5.1 = INTEGER: 450
  iso.3.6.1.4.1.41112.1.3.2.1.6.1 = INTEGER: 450
  iso.3.6.1.4.1.41112.1.3.2.1.17.1 = INTEGER: 20
  iso.3.6.1.4.1.41112.1.3.2.1.19.1 = INTEGER: -54
  iso.3.6.1.4.1.41112.1.3.2.1.22.1 = INTEGER: -57
  iso.3.6.1.4.1.41112.1.3.2.1.26.1 = INTEGER: 1
  iso.3.6.1.4.1.41112.1.3.2.1.44.1 = INTEGER: 86400
  iso.3.6.1.4.1.41112.1.3.2.1.8.1 = INTEGER: 45
  iso.3.6.1.4.1.41112.1.3.2.1.10.1 = INTEGER: 47
  iso.3.6.1.4.1.41112.1.3.1.1.5.1 = INTEGER: 11245
  iso.3.6.1.4.1.41112.1.3.1.1.6.1 = INTEGER: 10720
  iso.3.6.1.4.1.41112.1.3.2.1.4.1 = INTEGER: 7200
  """

  describe "parse_snmpget_output/2" do
    test "parses AF11X snmpget output into signal map" do
      result = SnmpClient.parse_snmpget_output(@af11x_output, :af11x)

      assert result.rx_power_0 == -55
      assert result.rx_power_1 == -56
      assert result.tx_power == 20
      assert result.cur_tx_mod_rate == 6
      assert result.remote_tx_mod_rate == 6
      assert result.rx_capacity == 450
      assert result.tx_capacity == 450
      assert result.remote_tx_power == 20
      assert result.remote_rx_power_0 == -54
      assert result.remote_rx_power_1 == -57
      assert result.link_state == 1
      assert result.link_uptime == 86_400
      assert result.radio_temp_0_c == 45
      assert result.radio_temp_1_c == 47
      assert result.tx_freq_mhz == 11_245
      assert result.rx_freq_mhz == 10_720
      assert result.link_distance_m == 7200
    end

    test "returns empty map for empty output" do
      assert SnmpClient.parse_snmpget_output("", :af11x) == %{}
    end

    test "skips lines with No Such Instance" do
      output = """
      iso.3.6.1.4.1.41112.1.3.2.1.11.1 = INTEGER: -55
      iso.3.6.1.4.1.41112.1.3.2.1.14.1 = No Such Instance currently exists at this OID
      """

      result = SnmpClient.parse_snmpget_output(output, :af11x)
      assert result.rx_power_0 == -55
      refute Map.has_key?(result, :rx_power_1)
    end
  end

  @af60_static_output """
  iso.3.6.1.4.1.41112.1.11.1.2.5.1 = INTEGER: 52
  iso.3.6.1.4.1.41112.1.11.1.2.6.1 = INTEGER: 1
  iso.3.6.1.4.1.41112.1.11.1.1.2.1 = INTEGER: 60480
  """

  @af60_station_output """
  iso.3.6.1.4.1.41112.1.11.1.3.1.3.170.211.109.42.26.137 = INTEGER: -58
  iso.3.6.1.4.1.41112.1.11.1.3.1.4.170.211.109.42.26.137 = INTEGER: 18
  iso.3.6.1.4.1.41112.1.11.1.3.1.5.170.211.109.42.26.137 = INTEGER: 9
  iso.3.6.1.4.1.41112.1.11.1.3.1.6.170.211.109.42.26.137 = INTEGER: 8
  iso.3.6.1.4.1.41112.1.11.1.3.1.7.170.211.109.42.26.137 = INTEGER: 900000
  iso.3.6.1.4.1.41112.1.11.1.3.1.8.170.211.109.42.26.137 = INTEGER: 850000
  iso.3.6.1.4.1.41112.1.11.1.3.1.15.170.211.109.42.26.137 = INTEGER: 2800
  iso.3.6.1.4.1.41112.1.11.1.3.1.17.170.211.109.42.26.137 = INTEGER: 8640000
  iso.3.6.1.4.1.41112.1.11.1.3.1.18.170.211.109.42.26.137 = INTEGER: -57
  iso.3.6.1.4.1.41112.1.11.1.3.1.19.170.211.109.42.26.137 = INTEGER: 19
  """

  describe "parse_af60_output/2" do
    test "parses AF60 static + station output" do
      result = SnmpClient.parse_af60_output(@af60_static_output, @af60_station_output)

      assert result.radio_temp_0_c == 52
      assert result.link_state == 1
      assert result.tx_freq_mhz == 60_480
      assert result.rx_power_0 == -58
      assert result.tx_power == 18
      assert result.cur_tx_mod_rate == 9
      assert result.remote_tx_mod_rate == 8
      assert result.tx_capacity == 900
      assert result.rx_capacity == 850
      assert result.link_distance_m == 2800
      assert result.link_uptime == 86_400
      assert result.remote_rx_power_0 == -57
      assert result.remote_tx_power == 19
    end

    test "returns empty map for empty output" do
      assert SnmpClient.parse_af60_output("", "") == %{}
    end

    test "converts tx/rx_capacity from kbps to mbps (integer division)" do
      # 450_500 kbps should round down to 450 mbps.
      station = """
      iso.3.6.1.4.1.41112.1.11.1.3.1.7.170.211.109.42.26.137 = INTEGER: 450500
      iso.3.6.1.4.1.41112.1.11.1.3.1.8.170.211.109.42.26.137 = INTEGER: 999
      """

      result = SnmpClient.parse_af60_output("", station)
      assert result.tx_capacity == 450
      # 999 kbps → 0 mbps (floor division)
      assert result.rx_capacity == 0
    end

    test "converts link_uptime from centiseconds to seconds" do
      station = """
      iso.3.6.1.4.1.41112.1.11.1.3.1.17.170.211.109.42.26.137 = INTEGER: 12345
      """

      result = SnmpClient.parse_af60_output("", station)
      assert result.link_uptime == 123
    end

    test "ignores unknown OID columns in the station output" do
      station = """
      iso.3.6.1.4.1.41112.1.11.1.3.1.3.170.211.109.42.26.137 = INTEGER: -42
      iso.3.6.1.4.1.41112.1.11.1.3.1.99.170.211.109.42.26.137 = INTEGER: 7777
      """

      result = SnmpClient.parse_af60_output("", station)
      assert result.rx_power_0 == -42
      refute Map.has_key?(result, :col_99)
      assert map_size(result) == 1
    end
  end

  describe "parse_snmpget_output/2 OID normalisation" do
    test "accepts SNMPv2-SMI::enterprises.* OID prefix" do
      output = """
      SNMPv2-SMI::enterprises.41112.1.3.2.1.11.1 = INTEGER: -61
      """

      result = SnmpClient.parse_snmpget_output(output, :af11x)
      assert result.rx_power_0 == -61
    end

    test "skips lines that don't parse as OID = value" do
      output = """
      iso.3.6.1.4.1.41112.1.3.2.1.11.1 = INTEGER: -55
      garbage line
      """

      result = SnmpClient.parse_snmpget_output(output, :af11x)
      assert result.rx_power_0 == -55
      assert map_size(result) == 1
    end

    test "skips values that aren't parseable as integers" do
      output = """
      iso.3.6.1.4.1.41112.1.3.2.1.11.1 = STRING: "not-a-number"
      iso.3.6.1.4.1.41112.1.3.2.1.14.1 = INTEGER: -56
      """

      result = SnmpClient.parse_snmpget_output(output, :af11x)
      refute Map.has_key?(result, :rx_power_0)
      assert result.rx_power_1 == -56
    end
  end
end