defmodule SimpleBar do

  @spec print_to_so(any,integer,integer) :: any
  def print_to_so(item_to_return, number_done, total) do
    percent_done(number_done,total)
      |> progress_bar("")
      |> IO.write
    item_to_return
  end

  @spec percent_done(integer(),integer()) :: float
  def percent_done(number_done,total) do
    (number_done/total) * 100
  end

  @spec progress_bar(float,any,any) :: char_list
  def progress_bar(0.0,str,percentage) do
    '\r#{percentage}% Done\n[#{str}]'
  end

  def progress_bar(remaining_per,str,percentage) do
    str = "#{str}="
    progress_bar(remaining_per-1, str,percentage)
  end


  def progress_bar(remaining_per,str) do
    str = "#{str}="
    percentage = remaining_per
    progress_bar(remaining_per-1, str,percentage)
  end

end