app/controllers/pages_controller.rb


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# frozen_string_literal: true

class PagesController < ApplicationController
  def index; end

  def randomize
    @groups = make_teams
    @machines = Machine.limit(@groups.size).order(Arel.sql('RANDOM()'))
  end

  private

  def make_teams
    r = Player.order(Arel.sql('RANDOM()')).to_a

    teams = []
    until r.empty?
      if (r.size % 4).zero?
        teams << r.shift(4)
      elsif r.size.even? && (r.size > 2)
        teams << r.shift(3)
        teams << r.shift(3)
      elsif (r.size % 3).zero?
        teams << r.shift(3)
      elsif r.size == 5
        teams << r.shift(3)
        teams << r.shift(2)
      else
        teams << r.shift(4)
      end
    end

    teams.sort { |a, b| b.length <=> a.length }
  end
end