defmodule ExNeuralNetwork do
  @moduledoc """
  Documentation for `NeuralNetwork`.
  """

  defmacro __using__(_) do
    quote do
      alias ExNeuralNetwork.Impl
      alias ExNeuralNetwork.Server

      @server ExNeuralNetwork.Server

      @spec start_link(Integer.t(), [Integer.t()], Integer.t(), Float.t()) ::
              {:ok, any} | {:error, any}
      def start_link(input_nodes, hidden_layers, output_nodes, learning_rate) do
        network = Impl.get_initial_network(input_nodes, hidden_layers, output_nodes)
        state = Server.get_inital_state(network, learning_rate)
        GenServer.start_link(@server, state, name: __MODULE__)
      end

      def query(input) do
        GenServer.call(__MODULE__, {:query, input})
      end

      def train(input, target) do
        GenServer.call(__MODULE__, {:train, input, target})
      end

      def get_network() do
        GenServer.call(__MODULE__, :get_network)
      end

      def set_network(network) do
        GenServer.cast(__MODULE__, {:set_network, network})
      end
    end
  end
end