Reset and Fisher-Yates shuffle at the end of the deck.

src/draw.js

@@ -7,16 +7,19 @@ class Strategies {
     }
 
     reset() {
-        this.cards = strategies;
+        this.cards = [...strategies];
     }
 
     shuffle() {
         const { cards } = this;
-        let f = cards.length, y;
+        const randomCard = top => Math.floor(Math.random() * top);
+        const shuffling = randomCard(cards.length);
 
-        while (f) {
-            y = Math.floor(Math.random() * f--);
-            [cards[f], cards[y]] = [cards[y], cards[f]];
+        for (let index = cards.length - 1; index > -1; index--) {
+            const toSwap = randomCard(index);
+            [cards[index], cards[toSwap]] = [cards[toSwap], cards[index]];
+
+            if (index === shuffling) console.log(`shuffling the deck`);
         }
 
         return this;
@@ -24,8 +27,13 @@ class Strategies {
 
     draw() {
         const drawn = this.cards.pop();
-        if (this.cards.length === 0) this.reset();
-        return drawn.toLowerCase();
+
+        if (this.cards.length === 0) { 
+            this.reset();
+            this.shuffle();
+        }
+
+        return (drawn || 'hello').toLowerCase();
     }
 }