94 lines
2.6 KiB
Rust
94 lines
2.6 KiB
Rust
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use anyhow::bail;
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pub struct Ruleset {
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pub n_slots: u8,
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pub n_suits: u8,
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pub n_cards_per_suit: u8,
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pub n_arcana: u8,
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}
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pub struct Deck {
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pub aces: Vec<Card>,
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pub suits: Vec<u8>,
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pub cards: Vec<CardMetadata>,
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}
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pub struct Setup {
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pub ruleset: Ruleset,
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pub deck: Deck
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}
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
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pub struct Card(pub u8);
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
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pub struct CardMetadata { pub suit: u8, pub rank: u8 }
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impl Ruleset {
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fn usable_slots(&self) -> u8 { self.n_slots - 1 }
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fn total_n_cards(&self) -> u8 {
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self.n_arcana + self.n_suits * self.n_cards_per_suit
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}
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fn usable_n_cards(&self) -> u8 {
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self.total_n_cards() - self.n_suits
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}
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pub fn compile(self) -> anyhow::Result<Setup> {
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self.validate()?;
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let deck = self.create_deck();
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Ok(Setup {
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ruleset: self,
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deck
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})
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}
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fn validate(&self) -> anyhow::Result<()> {
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if self.n_slots > 11 { bail!("max 11 slots") }
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if self.n_suits > 5 { bail!("max 5 suits") }
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if self.n_cards_per_suit > 13 { bail!("max 13 cards per suit") }
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if self.n_arcana > 99 { bail!("max 99 arcana") }
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if self.usable_slots() % 2 != 0 {
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bail!("must have even number of usable slots")
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}
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if self.usable_n_cards() % self.usable_slots() != 0 {
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bail!(
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"needs {} more cards for an even deal",
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self.usable_slots() - (self.usable_n_cards() % self.usable_slots())
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)
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}
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let instantly_placed_cards = self.n_suits +
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if self.n_arcana == 0 { 0 }
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else if self.n_arcana == 1 { 1 }
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else { 2 };
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if self.total_n_cards() - instantly_placed_cards < self.usable_slots() {
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bail!("can't place all cards without automoves");
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}
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Ok(())
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}
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fn create_deck(&self) -> Deck {
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let possible_suits = b"pscwb";
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let mut aces = vec![];
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let mut suits: Vec<u8> = vec![];
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suits.extend(possible_suits[..self.n_suits as usize].into_iter());
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let mut cards = vec![];
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// suited cards
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for &suit in &suits {
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for rank in 1..=self.n_cards_per_suit {
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if rank == 1 {
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aces.push(Card(cards.len() as u8))
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}
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cards.push(CardMetadata { suit, rank: rank as u8 })
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}
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}
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// arcana
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for rank in 0..self.n_arcana {
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cards.push(CardMetadata {suit: b'a', rank});
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}
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Deck { aces, suits, cards }
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}
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}
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