implement insurance bets

10_Blackjack/ruby/game.rb

@@ -22,6 +22,7 @@ class Game
     loop do
       collect_bets_and_deal
       play_players
+      check_for_insurance_bets
       play_dealer
       settle
     end
@@ -48,6 +49,18 @@ class Game
     end
   end
 
+  def check_for_insurance_bets
+    return if @dealer_hand.cards[0].label != "A"
+
+    print "ANY INSURANCE? "
+    return if gets.strip != "Y"
+
+    @players.each_entry do |player|
+      print "PLAYER #{player.id} INSURANCE BET? "
+      player.bet_insurance(gets.to_i)
+    end
+  end
+
   def play_dealer
     puts "DEALER HAS A \t#{@dealer_hand.cards[1].label} CONCEALED FOR A TOTAL OF #{@dealer_hand.total}"
 

10_Blackjack/ruby/model/hand.rb

@@ -29,6 +29,10 @@ class Hand
     @state == HAND_STATE_STAND
   end
 
+  def is_blackjack?
+    total == 21 && @cards.length == 2
+  end
+
   def total(is_dealer: false)
     return @total unless @total.nil?
     

10_Blackjack/ruby/model/player.rb

@@ -5,17 +5,21 @@ class Player
   def initialize(id)
     @id = id
     @balance = 0
+    @original_bet = 0
+    @insurance = 0
 
     @hand = nil
     @split_hand = nil
   end
 
-  attr_reader :id, :balance, :hand, :split_hand
+  attr_reader :id, :balance, :hand, :split_hand, :insurance
 
   ## Begining of hand dealing actions
   def deal_initial_hand(hand)
     @hand = hand
     @split_hand = nil
+    @max_insurance = @hand.bet / 2
+    @insurance = 0
   end
 
   def has_split_hand?
@@ -32,7 +36,18 @@ class Player
     @hand, @split_hand = @hand.split
   end
 
-  def bet_insurance(insurance_bet)
+  def bet_insurance(bet)
+    if bet < 0
+      bet = 0
+      puts "NEGATIVE BET -- using 0 insurance bet"
+    end
+
+    if bet > @max_insurance
+      bet = @max_insurance
+      puts "TOO HIGH -- using max insurance bet of #{bet}"
+    end
+
+    @insurance = bet
   end
 
   ## End of hand dealing actions
@@ -45,6 +60,12 @@ class Player
       balance_update += get_balance_update(@split_hand, dealer_hand)
     end
 
+    if dealer_hand.is_blackjack?
+      balance_update += 2 * @insurance
+    else
+      balance_update -= @insurance
+    end
+
     @balance += balance_update
 
     balance_update