defmodule ZWave do
  @moduledoc """
  ZWave module.
  """

  require Logger
  use Supervisor

  def start_link(_) do
    Supervisor.start_link(__MODULE__, {}, name: __MODULE__)
  end

  def start_child(defn) do
    Supervisor.start_child(__MODULE__, defn)
  end

  def init(_) do
    supervise([], strategy: :one_for_one)
  end

  @doc """
  Start a network

  Returns `:ok`.

  ## Examples

      iex> ZWave.start("/dev/tty.usbmodem14101", "net1")
      :ok

  """
  def start(device, network), do: ZWave.ZStick.start(device, network |> String.to_atom())

  @doc """
  Send a command to a node

  Returns `:ok`.

  ## Examples

      iex> ZWave.send_command("stick1", "node_3", {:basic_set, 100})
      :ok

  """
  def send_command(net, node, cmd), do: GenServer.call(get_node_pid(net, node), {:command, cmd})

  @doc """
  Get node informations

  Returns `:ok`.

  ## Examples

      iex> ZWave.get_node_info("stick1", "node_3")
      :ok

  """
  def get_node_info(net, node), do: GenServer.call(get_node_pid(net, node), :get_info)

  defp get_node_pid(net, node), do: Process.whereis("#{net}_#{node}" |> String.to_atom())
end