defmodule Cli do
  def call(command) do
    case command do
      "map" ->
        input()
        |> PortingTools.Mappings.map()
        |> output(:map)

      "resourceloc" ->
        input()
        |> PortingTools.ResourceLoc.resolve()
        |> output(:map)

      _ ->
        raise "Invalid command!"
    end
  end

  def input() do
    IO.gets(nil) |> String.trim()
  end

  def output(response, type) do
    case {response, type} do
      {s, _} when is_binary(s) -> s
      {nil, :map} -> "<unknown>"
      {nil, :resourceloc} -> "<invalid>"
    end
    |> IO.puts()
  end
end