more improvements

src/blackjack.rs

@@ -2,22 +2,41 @@ use crate::{decks::new_blackjack_shoe, hand::Hand};
 
 pub struct BlackjackGame {
     shoe: Hand,
-    player_hand: Hand,
+    players: Vec<Player>,
     dealer_hand: Hand,
     state: GameState,
 }
 
-pub enum PlayResult {
-    DealerBlackJack, // Dealer has a blackjack. Player does not
-    PlayerBlackJack, // Player has a blackjack. Dealer does not
-    PushBlackjack,   // Player and dealer have a blackjack
-    Push,            // Dealer has a Blackjack and so does the Player
-    Bust,            // Player bust
-    DealerBust,      // Dealer bust
-    StandPlayerLose, // Dealer stands and wins
-    StandPlayerWin,  // Dealer stands and loses
-    Continue,        // Game goes on as normal
-    InvalidMove,
+pub struct Player {
+    hand: Hand,
+    state: PlayerState,
+}
+
+impl Player {
+    fn new() -> Self {
+        Player {
+            hand: Hand::new(),
+            state: PlayerState::Playing,
+        }
+    }
+
+    pub fn get_hand(&self) -> &Hand {
+        &self.hand
+    }
+
+    pub fn get_state(&self) -> &PlayerState {
+        &self.state
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum PlayerState {
+    Playing,
+    Standing,
+    DoubleDown,
+    Busted,
+    Blackjack,
+    Maxed, // Reached 21
 }
 
 #[derive(Clone, Copy, Debug)]
@@ -25,22 +44,22 @@ pub enum PlayMoves {
     Hit,
     Stand,
     DoubleDown,
-    Bet, // At the Start of the game
+    Deal(usize),
 }
 
 pub enum GameState {
-    Empty,      // No cards have been dealt
+    Starting,
     Over,              // Game is over
-    PlayerTurn, // Its the turn of the player
+    PlayerTurn(usize), // Its the turn of the player
 }
 
 impl BlackjackGame {
     pub fn new() -> Self {
         BlackjackGame {
             shoe: new_blackjack_shoe(6),
-            player_hand: Hand::new(),
+            players: Vec::new(),
             dealer_hand: Hand::new(),
-            state: GameState::Empty,
+            state: GameState::Starting,
         }
     }
 
@@ -48,98 +67,128 @@ impl BlackjackGame {
         &self.dealer_hand
     }
 
-    pub fn get_player_hand(&self) -> &Hand {
-        &self.player_hand
-    }
-
     pub fn get_state(&self) -> &GameState {
         &self.state
     }
 
-    pub fn play(&mut self, action: PlayMoves) -> PlayResult {
+    pub fn get_player(&self, index: usize) -> Option<&Player> {
+        self.players.get(index)
+    }
+
+    pub fn get_player_count(&self) -> usize {
+        self.players.len()
+    }
+
+    pub fn play(&mut self, action: PlayMoves) -> bool {
         match (&self.state, action) {
-            (GameState::Empty, PlayMoves::Bet) => {
-                self.player_hand.add_card(self.shoe.pop_card().unwrap());
-                self.dealer_hand.add_card(self.shoe.pop_card().unwrap());
+            (GameState::PlayerTurn(i), PlayMoves::Hit) => {
+                let Some(player) = self.players.get_mut(*i) else {
+                    return false;
+                };
 
-                self.player_hand.add_card(self.shoe.pop_card().unwrap());
-                self.dealer_hand.add_card(self.shoe.pop_card().unwrap());
-
-                match (self.dealer_hand.is_backjack(),self.player_hand.is_backjack()) {
-                    (true,true) => {
-                        self.state = GameState::Over;
-                        PlayResult::PushBlackjack
-                    },
-                    (true,false) => {
-                        self.state = GameState::Over;
-                        PlayResult::DealerBlackJack
-                    },
-                    (false,true) => {
-                        self.state = GameState::Over;
-                        PlayResult::PlayerBlackJack
-                    },
-                    (false,false) => {
-                        self.state = GameState::PlayerTurn;
-                        PlayResult::Continue
-                    },
+                if player.state != PlayerState::Playing {
+                    return false;
                 }
-            }
-            (GameState::PlayerTurn, PlayMoves::Hit) => {
-                self.player_hand.add_card(self.shoe.pop_card().unwrap());
 
-                return match self.player_hand.get_blackjack_value().cmp(&21) {
+                player.hand.add_card(self.shoe.pop_card().unwrap());
+                match player.hand.get_blackjack_value().cmp(&21) {
                     std::cmp::Ordering::Equal => {
-                        self.state = GameState::Over;
-                        self.dealer_play()
+                        player.state = PlayerState::Maxed;
                     }
                     std::cmp::Ordering::Greater => {
-                        self.state = GameState::Over;
-                        PlayResult::Bust
+                        player.state = PlayerState::Busted;
+                    }
+                    std::cmp::Ordering::Less => {
+                        // Player is still playing
                     }
-                    std::cmp::Ordering::Less => PlayResult::Continue,
                 };
-            },
-            (GameState::PlayerTurn, PlayMoves::DoubleDown) => {
-                if self.player_hand.count() > 2{
-                    return PlayResult::InvalidMove;
+            }
+            (GameState::PlayerTurn(i), PlayMoves::DoubleDown) => {
+                let Some(player) = self.players.get_mut(*i) else {
+                    return false;
+                };
+
+                if player.state != PlayerState::Playing {
+                    return false;
                 }
 
-                self.player_hand.add_card(self.shoe.pop_card().unwrap());
-                self.state = GameState::Over;
-                return self.dealer_play();
-            },
-            (GameState::PlayerTurn, PlayMoves::Stand) => {
-                self.state = GameState::Over;
-                return self.dealer_play();
+                player.hand.add_card(self.shoe.pop_card().unwrap());
+                match player.hand.get_blackjack_value().cmp(&21) {
+                    std::cmp::Ordering::Equal | std::cmp::Ordering::Less => {
+                        player.state = PlayerState::Maxed;
                     }
-            (GameState::Over, _)
-            | (GameState::Empty, _)
-            | (GameState::PlayerTurn, PlayMoves::Bet) => {
-                return PlayResult::InvalidMove;
+                    std::cmp::Ordering::Greater => {
+                        player.state = PlayerState::Busted;
                     }
+                };
+            }
+            (GameState::PlayerTurn(i), PlayMoves::Stand) => {
+                let Some(player) = self.players.get_mut(*i) else {
+                    return false;
+                };
+
+                if player.state != PlayerState::Playing {
+                    return false;
+                }
+
+                player.state = PlayerState::Standing;
+            }
+            (GameState::Over, PlayMoves::Deal(player_count))
+            | (GameState::Starting, PlayMoves::Deal(player_count)) => {
+                for i in 0..player_count {
+                    self.players.push(Player::new());
+                    self.players[i].hand.add_card(self.shoe.pop_card().unwrap());
+                }
+
+                self.dealer_hand.add_card(self.shoe.pop_card().unwrap());
+
+                for i in 0..player_count {
+                    self.players[i].hand.add_card(self.shoe.pop_card().unwrap());
+
+                    if self.players[i].hand.is_backjack() {
+                        self.players[i].state = PlayerState::Blackjack;
                     }
                 }
 
-    fn dealer_play(&mut self) -> PlayResult {
-        // Stand on 17 or above
-        // Hit on 16 and below
+                self.dealer_hand.add_card(self.shoe.pop_card().unwrap());
 
+                self.state = GameState::PlayerTurn(0);
+            }
+            (_, PlayMoves::Deal(_)) | (GameState::Over, _) | (GameState::Starting, _) => {
+                return false;
+            }
+        }
+
+        let player_count = self.players.len();
+
+        match self.state {
+            GameState::PlayerTurn(i) => {
+                if self.players[i].state == PlayerState::Playing {
+                    self.state = GameState::PlayerTurn(i);
+                } else if i + 1 >= player_count {
                     loop {
                         let dealer_value = self.dealer_hand.get_blackjack_value();
                         if dealer_value >= 17 {
-                let player_value = self.player_hand.get_blackjack_value();
-
-                return match dealer_value.cmp(&player_value) {
-                    std::cmp::Ordering::Equal => PlayResult::Push,
-                    std::cmp::Ordering::Greater => PlayResult::StandPlayerLose,
-                    std::cmp::Ordering::Less => PlayResult::StandPlayerWin,
-                };
+                            // Check winners
+                            self.state = GameState::Over;
+                            return true;
                         }
 
                         self.dealer_hand.add_card(self.shoe.pop_card().unwrap());
 
                         if self.dealer_hand.get_blackjack_value() > 21 {
-                return PlayResult::DealerBust;
+                            // Dealer busts
+                            self.state = GameState::Over;
+                            return true;
+                        }
+                    }
+                } else {
+                    self.state = GameState::PlayerTurn(i + 1);
+                }
+                return true;
+            }
+            _ => {
+                return false;
             }
         }
     }

src/console_blackjack.rs

@@ -4,73 +4,31 @@ use crate::blackjack::{BlackjackGame, GameState, PlayMoves};
 
 pub fn play() -> Result<(), Box<dyn std::error::Error>> {
     let mut game = BlackjackGame::new();
-    let mut play_move = PlayMoves::Bet;
 
-    while !matches!(game.get_state(), GameState::Over) {
-        match game.play(play_move) {
-            crate::blackjack::PlayResult::DealerBlackJack => {
-                print_full_state(&game);
-                println!("Dealer wins with blackjack!");
-            }
-            crate::blackjack::PlayResult::PlayerBlackJack => {
-                print_full_state(&game);
-                println!("Player has a blackjack!");
-            },
-            crate::blackjack::PlayResult::PushBlackjack => {
-                print_full_state(&game);
-                println!("Player and Dealer have a blackjack!");
-            }
-            crate::blackjack::PlayResult::DealerBust => {
-                print_full_state(&game);
-                println!("Dealer busts. Player wins!");
-            }
-            crate::blackjack::PlayResult::StandPlayerLose => {
-                print_full_state(&game);
-                println!(
-                    "Dealer wins with {}",
-                    game.get_dealer_hand().get_blackjack_value()
-                );
-            }
-            crate::blackjack::PlayResult::StandPlayerWin => {
-                print_full_state(&game);
-                println!(
-                    "Player wins with {}",
-                    game.get_player_hand().get_blackjack_value()
-                );
-            }
-            crate::blackjack::PlayResult::Push => {
-                print_full_state(&game);
-                println!("Player and dealer have the same value. Push!");
-            }
-            crate::blackjack::PlayResult::Bust => {
-                print_full_state(&game);
-                println!(
-                    "Player busts with {}",
-                    game.get_player_hand().get_blackjack_value()
-                );
-            }
-            crate::blackjack::PlayResult::InvalidMove => {
-                println!("You cannot do that!");
-                play_move = get_move()?;
-            }
-            crate::blackjack::PlayResult::Continue => {
-                println!("Dealer: {} ?", game.get_dealer_hand().get_card(0).unwrap());
-                println!(
-                    "Player: {} ({})",
-                    game.get_player_hand(),
-                    game.get_player_hand().get_blackjack_value()
-                );
-                play_move = get_move()?
-            }
-        }
-    }
-
-    Ok(())
-}
-
-fn get_move() -> Result<PlayMoves, io::Error> {
     loop {
-        println!("(H)it (S)tand (D)double");
+        match game.get_state() {
+            GameState::PlayerTurn(player_index) => {
+                print_full_state(&game);
+                let play_move = get_move(*player_index)?;
+                if !game.play(play_move){
+                    println!("You can't do that");
+                }
+            },
+            GameState::Over => {
+                print_full_state(&game);
+                println!("Game over");
+                return Ok(());
+            }
+            GameState::Starting => {
+                game.play(PlayMoves::Deal(2));
+            },
+        }
+    }
+}
+
+fn get_move(player_index: usize) -> Result<PlayMoves, io::Error> {
+    loop {
+        println!("P{}, (H)it (S)tand (D)double",player_index);
         let mut buffer = String::new();
 
         stdin().read_line(&mut buffer)?;
@@ -85,14 +43,10 @@ fn get_move() -> Result<PlayMoves, io::Error> {
 }
 
 fn print_full_state(game: &BlackjackGame) {
-    println!(
-        "Dealer: {} ({})",
-        game.get_dealer_hand(),
-        game.get_dealer_hand().get_blackjack_value()
-    );
-    println!(
-        "Player: {} ({})",
-        game.get_player_hand(),
-        game.get_player_hand().get_blackjack_value()
-    );
+    println!("Dealer: {} ({})", game.get_dealer_hand(), game.get_dealer_hand().get_blackjack_value());
+
+    for player_index in 0..game.get_player_count(){
+        let player = game.get_player(player_index).unwrap();
+        println!("P{}: {} ({})",player_index,player.get_hand(),player.get_hand().get_blackjack_value());
+    }
 }