defmodule Server.Conn do
  require Logger
  use GenServer

  @impl true
  def init(_args) do
    initial_state = %{"num_conns" => 0}
    {:ok, initial_state}
  end

  @impl true
  def handle_call(_socket, _from, _state) do
    throw("call is unimplementedd")
  end

  @impl true
  def handle_cast(socket, state) do
    spawn(handle(socket))

    %{"num_conns" => state.num_conns + 1}
  end

  defp handle(socket) do
    case :gen_tcp.recv(socket, 1024) do
      {:ok, packet} ->
        Logger.debug("[Server.Conn] packet #{packet}")
      {:error, reason} ->
        Logger.error("[Server.Conn] failed to read connection: #{reason}")

    end

    handle(socket)
  end
end