fix stock flip up and stock recycle

src/card_game.rs

@@ -152,18 +152,28 @@ impl Pile {
 			face_up: Stack::new(),
 		}
 	}
+	pub fn flip_it_and_reverse_it(&mut self) {
+		self.swap_up_down();
+		self.face_up.reverse();
+	}
 	pub fn swap_up_down(&mut self) {
 		core::mem::swap(&mut self.face_up, &mut self.face_down);
 	}
+	pub fn flip_up(&mut self) {
+		if let Some(card) = self.face_down.pop() {
+			self.face_up.push(card);
+		}
+	}
 	pub fn is_empty(&self) -> bool {
 		self.face_down.is_empty() && self.face_up.is_empty()
 	}
 	pub fn pop(&mut self) -> Option<Card> {
-		let card = self.face_up.pop()?;
+		self.face_up.pop()
-		if self.face_up.is_empty() {
-			if let Some(card) = self.face_down.pop() {
-				self.face_up.push(card);
 	}
+	pub fn pop_flip_up(&mut self) -> Option<Card> {
+		let card = self.pop()?;
+		if self.face_up.is_empty() {
+			self.flip_up();
 		}
 		Some(card)
 	}

src/klondike.rs

@@ -234,12 +234,20 @@ impl Game for Klondike {
 			KlondikeInstruction {
 				src: KlondikePileId::Stock,
 				dst: KlondikePileId::Stock,
-			} if self.pile(KlondikePileId::Stock).is_empty() => {
+			} => {
-				self.pile_mut(KlondikePileId::Stock).swap_up_down();
+				if self.pile(KlondikePileId::Stock).face_down().is_empty() {
+					self.pile_mut(KlondikePileId::Stock).flip_it_and_reverse_it();
+				}else{
+					self.pile_mut(KlondikePileId::Stock).flip_up();
+				}
 			}
 			KlondikeInstruction { src, dst } => {
-				let card = self.pile_mut(src).pop().unwrap();
+				if let Some(card) = self.pile_mut(src).pop_flip_up() {
 					self.pile_mut(dst).push(card);
+				} else {
+					println!("Attempted to move from an empty src");
+					dbg!(instruction);
+				}
 			}
 		}
 	}