defmodule Ash.Error.Changes.InvalidAttribute do
  @moduledoc "Used when an invalid value is provided for an attribute change"
  use Ash.Error.Exception

  def_ash_error([:field, :message], class: :invalid)

  defimpl Ash.ErrorKind do
    def id(_), do: Ecto.UUID.generate()

    def code(_), do: "invalid_attribute"

    def message(error) do
      "Invalid value provided#{for_field(error)}#{do_message(error)}"
    end

    defp for_field(%{field: field}) when not is_nil(field), do: " for #{field}"
    defp for_field(_), do: ""

    defp do_message(%{message: ""} = error), do: do_message(%{error | message: nil})

    defp do_message(%{message: message}) when is_binary(message) do
      ": #{message}."
    end

    defp do_message(_other) do
      "."
    end
  end
end