defmodule Chessh.SSH.Client.Screen do
  @callback render(width :: integer(), height :: integer(), state :: any()) :: any()
  @callback input(width :: integer(), height :: integer(), action :: any(), state :: any()) ::
              any()

  defmacro __using__(_) do
    quote do
      @behaviour Chessh.SSH.Client.Screen
      use GenServer

      def handle_info({:render, width, height}, state),
        do: {:noreply, render(width, height, state)}

      def handle_info({:input, width, height, action}, state),
        do: {:noreply, input(width, height, action, state)}
    end
  end
end