-#[must_use]
-pub 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() {
+pub fn random_player(draw_chance: f64) -> impl FnMut(&Game) -> Play {
+ move |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(draw_chance) {
+ Play::Draw
+ } else {
+ match game.current_player_hand().random() {
+ Some(card) => Play::Play(*card),
+ None => Play::Draw,
+ }
+ }
+ }
+ }
+ }
+}
+
+/// When available, make plays that grant momentum. Otherwise, play randomly.
+pub fn momentum_player(draw_chance: f64) -> impl FnMut(&Game) -> Play {
+ let mut fallback = random_player(draw_chance);
+ move |game: &Game| -> Play {
+ match (&game.phase, game.discard.top().and_then(Card::suit)) {
+ (Phase::Play, Some(suit)) => {
+ match game.current_player_hand().filter_by_suit(suit).random() {