exbee

defmodule Exbee.ATCommandResultFrame do
  @moduledoc """
  Received in response to an `Exbee.ATCommandFrame` or `Exbee.ATCommandQueueFrame`.

  Some commands send back multiple frames; for example, the `ND` command.
  """

  @type t :: %__MODULE__{id: integer, command: String.t(), status: atom, value: binary}
  defstruct id: 0x01, command: nil, status: nil, value: nil

  defimpl Exbee.DecodableFrame do
    @statuses %{
      0x00 => :ok,
      0x01 => :error,
      0x02 => :invalid_command,
      0x03 => :invalid_parameter,
      0x04 => :transmition_failure
    }

    def decode(frame, encoded_binary) do
      case encoded_binary do
        <<0x88, id::8, command::bitstring-size(16), status::8, value::binary>> ->
          {:ok, %{frame | id: id, command: command, status: @statuses[status], value: value}}

        _ ->
          {:error, :invalid_binary}
      end
    end
  end
end