defmodule PN532.Client.Detected do
  @moduledoc """
  Functions for when we are in the connected state
  """
  require Logger

  def detecting(:cast, :stop_target_detection, data)  do
    {:next_state, :connected, data}
  end

  def detected(:internal, {:cards_detected, cards},
    data = %{current_cards: current_cards, handler: handler, connection: connection, connection_options: connection_options}) do

    handler_response =
      if current_cards !== cards do
        apply(handler, :handle_event, [:cards_detected, cards, PN532.HandlerClient, PN532.HandlerClient.new(connection, connection_options)])
      end

    case handler_response do
      {:noreply, %{connection: new_connection, connection_options: connection_options, detected_cards: detected_cards}} ->
        {:next_state, :detecting, %{data | current_cards: cards, connection: new_connection, connection_options: connection_options, detected_cards: detected_cards}, [{:state_timeout, 1000, :poll_for_cards}]}
      {:noreply, %{connection: new_connection, connection_options: connection_options}} ->
        {:next_state, :detecting, %{data | current_cards: cards, connection: new_connection, connection_options: connection_options}, [{:state_timeout, 1000, :poll_for_cards}]}
      _ ->
        {:next_state, :detecting, data, [{:state_timeout, 1000, :poll_for_cards}]}
    end
  end

  def detected(type, event, data) do
    case PN532.Client.Connected.connected(type, event, data) do
      {option, data, actions} when is_list(actions) ->
        {option, data, actions}
      {option, actions} when is_list(actions) ->
        {option, actions}
    end
  end
end