formula

defmodule Formula.Errors do
  @moduledoc """
  Errors wrapper module for the more specific errors defined using macros.
  """

  @errors %{
    "DIV/0!" => DivideByZeroError,
    "MISSING_ARGS" => MissingArgumentsError,
    "INVALID_ARGS" => InvalidArgumentsError,
    "INVALID_FORMULA" => InvalidFormulaError
  }

  for {symbol, name} <- @errors do
    name = Module.concat(__MODULE__, name)

    defmodule name do
      defexception [:message, :attributes]

      @type t :: %unquote(name){
              message: String.t(),
              attributes: map()
            }

      def exception(opts) do
        {message, opts} = Keyword.pop_first(opts, :message, "Encounter error: #{unquote(symbol)}")

        %unquote(name){
          message: message,
          attributes: Map.new(opts)
        }
      end
    end
  end
end