module CompletionsConcern
  extend ActiveSupport::Concern

  def pad(n)
    if n > 9
      return n.to_s
    end
    "0" + n.to_s
  end

  def display_time(time)
    if time == nil
      return ""
    end
    h = time / 3600
    m = (time % 3600) / 60
    s = (time % 3600) % 60
    if h > 0
      return h.to_s + ":" + pad(m) + ":" + pad(s)
    end
    m.to_s + ":" + pad(s)
  end

  def extend_completions!(contestant)
    completions = contestant.completions
    puzzles = contestant.contest.puzzles
    if puzzles.length > 1
      current_time_from_start = 0
      completions.order(:time_seconds).each do |completion|
        completion.update(display_time_from_start: display_time(completion.time_seconds),
                          display_relative_time: display_time(completion.time_seconds - current_time_from_start))
        current_time_from_start = completion.time_seconds
      end
      contestant.update(display_time: display_time(current_time_from_start), time_seconds: current_time_from_start)
    elsif puzzles.length == 1 && completions.length >= 1
      if completions[0].remaining_pieces != nil
        contestant.update(
          display_time: "#{display_time(completions[0].time_seconds)} - #{puzzles[0].pieces - completions[0].remaining_pieces}p",
          time_seconds: completions[0].projected_time
        )
      else
        contestant.update(display_time: display_time(completions[0].time_seconds), time_seconds: completions[0].time_seconds)
      end
    end
  end
end