+ fn len(&self) -> usize {
+ self.cards.len()
+ }
+ #[cfg(test)]
+ fn random(&self) -> Option<&Card> {
+ self.cards.choose(&mut rand::thread_rng())
+ }
+}
+
+#[derive(Copy, Clone)]
+pub struct PlayerIndex(usize);
+impl PlayerIndex {
+ fn next(self, num_players: usize) -> Self {
+ Self((self.0 + 1) % num_players)
+ }
+}
+
+#[derive(Copy, Clone, Debug)]
+pub enum Play {
+ Play(Card),
+ Draw,
+}
+
+#[derive(Eq, PartialEq)]
+pub enum Phase {
+ Play,
+ Momentum,
+}
+
+pub enum GameOutcome {
+ Loss,
+ Win,
+}
+
+pub enum PlayOutcome {
+ Continue,
+ End(GameOutcome),
+}
+
+pub struct Game {
+ mad_science_tokens: i8,
+ progress: [i8; NUM_SUITS],
+ path_lengths: [PathLength; NUM_SUITS],
+ path_length_info: [PathLengthInfo; NUM_SUITS],
+ library: Library,
+ discard: Discard,
+ hands: Vec<Hand>,
+ turn: PlayerIndex,
+ phase: Phase,
+}
+impl Game {
+ pub fn add_player(&mut self) {
+ self.hands.push(Hand::default());
+ for _ in 0..STARTING_CARDS {
+ self.draw_for_player(PlayerIndex(self.hands.len() - 1));
+ }
+ }
+ /// # Errors
+ ///
+ /// Will return `Err` on invalid plays, like trying to draw during Play phase,
+ /// or trying to play a card that's not in your hand.
+ pub fn play(&mut self, play: Play) -> Result<PlayOutcome, &'static str> {
+ match play {
+ Play::Play(card) => self.play_card(card),
+ Play::Draw => self.draw_for_momentum(),
+ }
+ }
+
+ #[must_use]
+ pub fn current_player_hand(&self) -> &Hand {
+ &self.hands[self.turn.0]
+ }
+ fn player_hand_mut(&mut self, pi: PlayerIndex) -> &mut Hand {
+ &mut self.hands[pi.0]
+ }
+ fn current_player_hand_mut(&mut self) -> &mut Hand {
+ self.player_hand_mut(self.turn)
+ }
+
+ fn play_card(&mut self, card: Card) -> Result<PlayOutcome, &'static str> {
+ let momentum = self.apply_card(card)?;
+ if self.phase == Phase::Play && momentum {
+ self.phase = Phase::Momentum;
+ Ok(PlayOutcome::Continue)
+ } else {
+ Ok(self.end_of_turn())
+ }
+ }
+ fn draw_for_momentum(&mut self) -> Result<PlayOutcome, &'static str> {
+ if self.phase != Phase::Momentum {
+ return Err("You don't have momentum");
+ }
+ self.draw_for_player(self.turn);
+ Ok(self.end_of_turn())
+ }
+
+ fn draw_for_player(&mut self, pi: PlayerIndex) {
+ loop {
+ if let Some(card) = self.library.draw(&mut self.discard) {
+ if card.is_joker() {
+ self.remove_mad_science_token();
+ self.discard.discard(card);
+ } else {
+ self.player_hand_mut(pi).add(card);
+ break;
+ }
+ } else {
+ println!("Library ran out of cards");
+ }
+ }
+ }
+ fn remove_mad_science_token(&mut self) {
+ loop {
+ self.mad_science_tokens -= 1;
+ if self.mad_science_tokens != 0 {
+ break;
+ }
+ }
+ }
+ fn make_progress(&mut self, card: Card) {
+ let rank = card.rank().expect("Can't play jokers").0;
+ if rank < 6 {
+ let roll = rand::thread_rng().gen_range(1..=6);
+ if roll > rank {
+ self.remove_mad_science_token();
+ }
+ }
+ self.progress[usize::from(card.suit().expect("Can't play jokers").0)] += 1;
+ }
+ fn forecast(&mut self, card: Card) {
+ let suit = usize::from(card.suit().expect("Can't play jokers").0);
+ self.path_length_info[suit].reveal_random(self.path_lengths[suit]);
+ }
+ // Returns whether or not this play grants momentum
+ fn apply_card(&mut self, card: Card) -> Result<bool, &'static str> {
+ self.current_player_hand_mut().remove(card)?;
+ if card.rank().expect("Can't play jokers").is_face() {
+ self.forecast(card);
+ } else {
+ self.make_progress(card);
+ }
+ let suits_match = self
+ .discard
+ .top()
+ .map_or(false, |dis| dis.suit() == card.suit());
+ self.discard.discard(card);
+ Ok(suits_match)
+ }
+ fn valid(&self) -> bool {
+ 108 == (self.library.len()
+ + self.discard.len()
+ + self.hands.iter().map(Hand::len).sum::<usize>())
+ }
+ fn roll_mad_science(&mut self) -> PlayOutcome {
+ let mut tokens = std::iter::from_fn(|| Some(rand::thread_rng().gen_bool(0.5)))
+ .take(usize::try_from(self.mad_science_tokens.abs()).expect("wat?"));
+ let keep_going = if self.mad_science_tokens > 0 {
+ tokens.any(|t| !t)
+ } else {
+ tokens.all(|t| !t)
+ };
+ if keep_going {
+ PlayOutcome::Continue
+ } else {
+ PlayOutcome::End(self.final_score())
+ }
+ }
+ fn final_score(&self) -> GameOutcome {
+ if self
+ .progress
+ .iter()
+ .zip(self.path_lengths.iter())
+ .any(|(&prog, len)| prog >= len.0 .0.try_into().expect("wat?"))
+ {
+ GameOutcome::Win
+ } else {
+ GameOutcome::Loss
+ }
+ }
+ fn end_of_turn(&mut self) -> PlayOutcome {
+ assert!(self.valid());
+ self.phase = Phase::Play;
+ self.turn = self.turn.next(self.hands.len());
+ if self.turn.0 == 0 {
+ if let PlayOutcome::End(game_outcome) = self.roll_mad_science() {
+ return PlayOutcome::End(game_outcome);
+ }
+ }
+ self.draw_for_player(self.turn);
+ assert!(self.valid());
+ PlayOutcome::Continue
+ }
+}
+impl Default for Game {
+ fn default() -> Self {
+ Self {
+ mad_science_tokens: STARTING_MAD_SCIENCE_TOKENS,
+ progress: [STARTING_PROGRESS; NUM_SUITS],
+ path_lengths: std::iter::from_fn(|| Some(PathLength::random()))
+ .take(NUM_SUITS)
+ .collect::<Vec<_>>()
+ .try_into()
+ .expect("wat?"),
+ path_length_info: [PathLengthInfo::default(); NUM_SUITS],
+ library: Library::new(shuffled(
+ [
+ deck(WithOrWithoutJokers::WithJokers),
+ deck(WithOrWithoutJokers::WithJokers),
+ ]
+ .concat(),
+ )),
+ discard: Discard::default(),
+ hands: vec![],
+ turn: PlayerIndex(0),
+ phase: Phase::Play,
+ }
+ }
+}
+
+pub struct Player(Box<dyn FnMut(&Game) -> Play>);
+
+#[cfg(test)]
+fn random_player(game: &Game) -> Play {
+ match game.phase {
+ Phase::Play => Play::Play(
+ *game
+ .current_player_hand()
+ .random()
+ .expect("I always have a card to play because I just drew one"),
+ ),
+ Phase::Momentum => {
+ if rand::thread_rng().gen_bool(0.5) {
+ Play::Draw
+ } else {
+ match game.current_player_hand().random() {
+ Some(card) => Play::Play(*card),
+ None => Play::Draw,
+ }
+ }
+ }
+ }
+}
+
+/// # Errors
+///
+/// Will return `Err` on invalid plays, like trying to draw during Play phase,
+/// or trying to play a card that's not in your hand.
+pub fn play(mut game: Game, mut players: Vec<Player>) -> Result<GameOutcome, &'static str> {
+ game.draw_for_player(game.turn);
+ loop {
+ if let PlayOutcome::End(game_outcome) = game.play(players[game.turn.0].0(&game))? {
+ return Ok(game_outcome);
+ }
+ }
projects / pluta-lesnura / blobdiff