From 1c2d051364191c522aa9fdd12aaa37b3e3a287a9 Mon Sep 17 00:00:00 2001
From: Malaber <32635600+Malaber@users.noreply.github.com>
Date: Wed, 17 Apr 2019 18:30:17 +0200
Subject: [PATCH] Subtract one off required stages if the number of teams is a
 power of 2

This way we now calculate the right amount of stages for every number.
(I would test every number, but Jonas won't let me write tests for all of them..)
---
 app/services/playoff_stage_service.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/services/playoff_stage_service.rb b/app/services/playoff_stage_service.rb
index 1168ff4..fedcd07 100644
--- a/app/services/playoff_stage_service.rb
+++ b/app/services/playoff_stage_service.rb
@@ -65,7 +65,8 @@ class PlayoffStageService
       0
     else
       # black voodoo magic
-      stage_count = Math.log(Utils.previous_power_of_two(number_of_teams)) / Math.log(2)
+      stage_count = Math.log(Utils.next_power_of_two(number_of_teams)) / Math.log(2)
+      stage_count -= 1 if Utils.po2?(number_of_teams)
       stage_count.to_int
     end
   end