defmodule SumOfMultiples do
  @doc """
  Adds up all numbers from 1 to a given end number that are multiples of the factors provided.
  """
  @spec to(non_neg_integer, [non_neg_integer]) :: non_neg_integer
  def to(limit, factors) do
    for x <- 1..(limit - 1),
        Enum.any?(factors, &(&1 != 0 && rem(x, &1) == 0 )),
        reduce: 0
    do
      acc ->
          IO.inspect(acc)
          x + acc
    end
  end

  # def to(limit, factors) do
  #   factors
  #   |> Enum.flat_map(&multipliers(&1, limit))
  #   |> Enum.uniq()
  #   |> Enum.sum()
  # end

  # defp multipliers(from, to) when from <= to and rem(to, from) == 0, do: Enum.take_every(from..(to - 1), from)
  # defp multipliers(from, to) when from <= to, do: Enum.take_every(from..to, from)
  # defp multipliers(_from, _to), do: []
end