battle_manager.rb

class BattleManager
  GOLD = 100

  attr_accessor :results_battle

  def initialize(attacker, defender)
    @attacker = attacker
    @defender = defender
  end

  def war
    if winner?
      register_battle(@attacker, @defender)
    elsif loser?
      register_battle(@defender, @attacker)
    elsif draw?
      results_to_draw
    end
    self
  end

  private

    def register_battle(winner, loser)
      @results_battle = Battle.new( winner, loser)
      sum_money_army(winner)
      subtract_unit(loser)
    end

    def sum_money_army(army, gold = BattleManager::GOLD)
      GoldManager.new(army).sum(gold)
    end

    def subtract_unit(army, count = 2)
      army.greater_subtract_unit(count)
    end

    def winner?
      (@attacker.total_points > @defender.total_points)
    end

    def loser?
      (@attacker.total_points < @defender.total_points)
    end

    def draw?
      (@attacker.total_points == @defender.total_points)
    end

    def results_to_draw
      subtract_unit(@attacker, rand(0..2))
      subtract_unit(@defender, rand(0..2))
      sum_money_army(@attacker, rand(10..50))
      sum_money_army(@defender, rand(10..50))
      @results_battle = Battle.new( @attacker, @defender, true)
    end
end