defmodule Broker do
  use GenServer

  def init(opts) do
    {:ok, listen_socket} =
      :gen_tcp.listen(opts[:port], [
        :binary,
        reuseaddr: true,
        active: false,
        backlog: 100
      ])

    {:ok, opts}
  end

  defp accept_loop(listen_socket) do
    case :gen_tcp.accept(listen_socket) do
      {:ok, socket} ->
        spawn(__MODULE__, :handle_client, [socket])
        accept_loop(listen_socket)

      {:error, reason} ->
        IO.puts("接受連接失敗: #{reason}")
    end
  end
end