defmodule NeonVertigoService.Mqtt do
  use GenServer

  def start_link(_) do
    GenServer.start_link(__MODULE__, {})
  end
  
  def init(_) do
    mqtt_config = Application.fetch_env!(:neon_vertigo_service, :mqtt_params)
    {:ok, mqtt_pid} = :emqtt.start_link([{:owner, self()} | mqtt_config]) 
    {:ok, _mqtt_props} = :emqtt.connect(mqtt_pid)
    Process.link(mqtt_pid)

    :emqtt.subscribe(mqtt_pid, %{}, [{"$share/neon-vertigo-service/test/+", [{:qos, 1}]}])

    {:ok, {mqtt_pid}}
  end

  # Handling MQTT messages
  def handle_info({:publish, msg}, state) do
    IO.puts("Received message") 
    IO.inspect(msg)
    {:noreply, state}
  end
end