defmodule Mix.Tasks.Fermo.Build do
  use Mix.Task

  @shortdoc "Generates the output files"

  @moduledoc """
  Builds the project according to the settings in __MODULE__.build()
  """
  def run(_args) do
    Mix.Task.run("app.start")
    module = Mix.Fermo.Module.module!()
    {:ok, config} = module.config()
    {:ok, config} = Fermo.build(config)
    stats = Map.get(config, :stats)

    if stats do
      do_log(stats)
    end

    {:ok}
  end

  defp do_log(stats) do
    phases =
      stats
      |> Enum.map(& &1)
      |> Enum.sort(&(&1 |> elem(1) |> Time.compare(elem(&2, 1)) == :lt))

    start = phases |> hd() |> elem(1)

    Enum.each(phases, fn {action, time} ->
      diff = Time.diff(time, start, :millisecond)
      IO.puts("#{diff}ms #{action} ")
    end)
  end
end