Smarter smart dealer!
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@ -10,108 +10,167 @@ impl Deal {
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pub fn deal(setup: &Setup, rng: &mut impl Rng) -> Deal {
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loop {
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if let Some(d) = Self::deal1(setup, rng) {
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return d
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return d;
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}
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}
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}
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fn deal1(setup: &Setup, rng: &mut impl Rng) -> Option<Deal> {
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// don't use the middle slot
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let n_slots = (setup.ruleset.n_slots - 1) as usize;
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let aux_slot = n_slots;
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let n_usable_cards = setup.ruleset.usable_n_cards();
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let tower_height = n_usable_cards as usize / n_slots;
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let mut slots: Vec<Vec<Card>> = vec![vec![]; n_slots+1];
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// there are n - 1 final slots, because we don't use the middle one
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let n_final_slots = (setup.ruleset.n_slots - 1) as usize;
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let split_point =
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if setup.ruleset.n_arcana == 0 { 0 }
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else { rng.gen_range(0..setup.ruleset.n_arcana) };
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// we have an extra slot! it's the top slot, which blocks the wells
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let n_usable_slots = n_final_slots + 1;
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let n_wells = setup.ruleset.n_suits + 2;
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let mut slots: Vec<Vec<Card>> = vec![vec![]; n_usable_slots];
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let mut max_height: Vec<usize> = vec![0; n_usable_slots];
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let tower_height = n_usable_cards as usize / n_final_slots;
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let mut virtual_wells: Vec<Vec<Card>> = vec![vec![]; n_wells as usize + 2];
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for i in 1..=n_final_slots {
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max_height[i] = tower_height;
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}
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max_height[0] = 1;
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// rely on the order of the deck
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for r in 1..setup.ruleset.n_cards_per_suit { // skip aces
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for s in 0..setup.ruleset.n_suits {
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virtual_wells[s as usize].push(Card(setup.ruleset.n_cards_per_suit * s + r));
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let mut wells = Self::generate_wells(setup, rng);
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let mut pops = Self::plan_pops(&wells, rng);
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while let Some(w) = pops.pop() {
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let is_arcana = w >= setup.ruleset.n_suits as usize;
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let mut exclude = None;
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if !is_arcana {
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// we can't put a card in the well if it's blocked, so make sure it's unblocked
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if let Some(c) = slots[0].pop() {
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Self::find_home(setup, rng, 1.0, c, None, Some(0), &mut slots, &max_height);
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}
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exclude = Some(0); // don't place the new card in the auxiliary slot
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}
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let card = wells[w].pop().expect("card must be present");
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Self::find_home(setup, rng, 1.0, card, None, exclude, &mut slots, &max_height);
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// do some moves from acceptors to random slots
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const MAX_I: i32 = 48;
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for i in 0..MAX_I+1 {
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let src = rng.gen_range(0..slots.len());
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if let Some(accepted_card) = Self::pop_accepted_card(setup, src, &mut slots) {
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Self::find_home(setup, rng, ((MAX_I - i) as f64)/(MAX_I as f64), accepted_card, Some(src), None, &mut slots, &max_height);
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}
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}
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}
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let first_arcana = setup.ruleset.n_suits * setup.ruleset.n_cards_per_suit;
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for r in 0..split_point {
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virtual_wells[setup.ruleset.n_suits as usize].push(Card(r+first_arcana))
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}
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for r in (split_point..setup.ruleset.n_arcana).rev() {
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virtual_wells[setup.ruleset.n_suits as usize + 1].push(Card(r+first_arcana))
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// are any stacks too tall? fix them
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max_height[0] = 0; // auxiliary slot must be empty
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for i in 0..slots.len() {
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while slots[i].len() > max_height[i] {
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let card = slots[i].pop().expect("must be a card");
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Self::find_home(setup, rng, 0.0, card, None, None, &mut slots, &max_height);
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}
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}
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slots.remove(0); // get rid of the auxiliary slot
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if !Self::fix_instantly_accepted(setup, &mut slots) {
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return None;
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}
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for s in slots.iter() {
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assert_eq!(tower_height, s.len());
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}
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return Some(Deal { slots } )
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}
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fn generate_wells(setup: &Setup, rng: &mut impl Rng) -> Vec<Vec<Card>> {
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let split_point =
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if setup.ruleset.n_arcana == 0 { 0 }
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else { rng.gen_range(0..=setup.ruleset.n_arcana) };
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let n_wells = setup.ruleset.n_suits + 2;
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let mut wells: Vec<Vec<Card>> = vec![vec![]; n_wells as usize + 2];
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// fill the wells in suit order, relying on the order of the deck object
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for r in 1..setup.ruleset.n_cards_per_suit {
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for s in 0..setup.ruleset.n_suits {
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wells[s as usize].push(Card(setup.ruleset.n_cards_per_suit * s + r))
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}
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}
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// now fill the wells for arcana
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let first_arcana = setup.ruleset.n_suits * setup.ruleset.n_cards_per_suit;
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let arcana0 = setup.ruleset.n_suits as usize;
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let arcana1 = arcana0 + 1;
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for r in 0..split_point {
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wells[arcana0].push(Card(first_arcana + r));
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}
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for r in (split_point..setup.ruleset.n_arcana).rev() {
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wells[arcana1].push(Card(first_arcana + r));
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}
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wells
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}
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fn plan_pops(wells: &[Vec<Card>], rng: &mut impl Rng) -> Vec<usize> {
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let mut pops = vec![];
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for (well, contents) in virtual_wells.iter().enumerate() {
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for (well, contents) in wells.iter().enumerate() {
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for _ in 0..contents.len() {
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pops.push(well);
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}
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}
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pops.shuffle(rng);
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pops
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}
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fn find_home(card: Card, exclude: Option<usize>, setup: &Setup, slots: &mut [Vec<Card>], aux_slot: usize, tower_height: usize, rng: &mut impl Rng) {
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let mut acceptors = vec![];
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let mut not_full = vec![];
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for s in 0..slots.len() {
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let not_too_tall = slots[s].len() < if s == aux_slot { 1 } else { tower_height };
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if Some(s) != exclude {
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if not_too_tall && accepts(setup, slots[s].last().cloned(), card) {
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acceptors.push(s)
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}
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if not_too_tall {
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not_full.push(s);
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}
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}
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}
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fn peek2(stack: &Vec<Card>) -> (Option<Card>, Option<Card>) {
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let mut iter = stack.iter().rev();
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let top = iter.next().cloned();
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let second_to_top = iter.next().cloned();
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return (second_to_top, top);
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}
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acceptors.shuffle(rng);
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not_full.shuffle(rng);
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if rng.gen_bool(0.5) && acceptors.len() > 0 {
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let a = acceptors.first().unwrap();
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slots[*a].push(card);
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} else if let Some(a) = not_full.first() {
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slots[*a].push(card);
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} else if let Some(e) = exclude {
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slots[e].push(card)
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fn find_home(setup: &Setup, rng: &mut impl Rng, acceptor_odds: f64, card: Card, source: Option<usize>, exclude: Option<usize>, slots: &mut [Vec<Card>], max_height: &[usize]) {
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// if a card is sitting on an acceptor, it could have been moved there
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// from somewhere else
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let mut acceptors = vec![];
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// if a card is sitting on a start point, it could not have been moved
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// there from somewhere else
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let mut start_points = vec![];
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for s in 0..slots.len() {
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if Some(s) == exclude {
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// don't place it here, ever
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} else {
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panic!("should not ever happen")
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}
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}
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if accepts(setup, slots[s].last().cloned(), card) {
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acceptors.push(s);
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}
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while let Some(w) = pops.pop() {
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let card = virtual_wells[w].pop().expect("card must be present");
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find_home(card, None, setup, &mut slots, aux_slot, tower_height, rng);
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// move any card that is on an acceptor to a random slot
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for _ in 0..15 {
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let mut sources: Vec<usize> = (0..slots.len()).collect();
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sources.shuffle(rng);
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for src in sources {
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let mut iter = slots[src].iter().rev();
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let top = iter.next().cloned();
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let second_to_top = iter.next().cloned();
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if let Some(t) = top {
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if accepts(&setup, second_to_top, t) {
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slots[src].pop();
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find_home(t, Some(src), setup, &mut slots, aux_slot, tower_height, rng);
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}
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}
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if slots[s].len() < max_height[s] {
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start_points.push(s);
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}
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}
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}
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if let Some(top) = slots[n_slots].pop() {
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assert!(slots[n_slots].len() == 0);
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find_home(top, Some(n_slots), setup, &mut slots, aux_slot, tower_height, rng);
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assert!(slots[n_slots].len() == 0);
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let mut acceptor = acceptors.choose(rng).cloned();
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let start_point = start_points.choose(rng).cloned();
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if !rng.gen_bool(acceptor_odds) {
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// don't use an acceptor even though we could
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acceptor = None;
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}
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if let Some(a) = acceptor.or(start_point).or(source) {
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slots[a].push(card);
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} else {
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panic!("should not ever happen");
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}
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}
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fn fix_instantly_accepted(setup: &Setup, slots: &mut [Vec<Card>]) -> bool {
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let first_arcana = setup.ruleset.n_suits * setup.ruleset.n_cards_per_suit;
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let mut instantly_accepted = vec![];
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for &a in &setup.deck.aces {
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instantly_accepted.push(Card(a.0 + 1)) // twos
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@ -119,38 +178,39 @@ impl Deal {
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instantly_accepted.push(Card(first_arcana));
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instantly_accepted.push(Card(first_arcana + setup.ruleset.n_arcana - 1));
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for s in 0..n_slots {
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let mut iter = slots[s].iter().rev();
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let last = iter.next().cloned();
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let second_to_last = iter.next().cloned();
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for s in 0..slots.len() {
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let (second_to_last, last) = Self::peek2(&slots[s]);
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if let Some(last) = last {
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if instantly_accepted.contains(&last) {
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if let Some(c) = second_to_last {
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if instantly_accepted.contains(&c) {
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return None
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return false
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}
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let n = slots[s].len();
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(slots[s][n-2],slots[s][n-1]) = (last, c);
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}
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else {
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return None;
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return false; // confusing nonsense situation
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}
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}
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}
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}
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for s in 0..n_slots {
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assert!(slots[s].len() == tower_height)
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}
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slots.pop(); // get rid of aux slot
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return Some(Deal { slots });
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return true;
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}
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fn pop_accepted_card(setup: &Setup, src: usize, slots: &mut [Vec<Card>]) -> Option<Card> {
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let (card0, card1) = Self::peek2(&slots[src]);
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if let Some(c1) = card1 {
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if accepts(&setup, card0, c1) {
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slots[src].pop().expect("we just peeked at this");
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return Some(c1);
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}
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}
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None
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}
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}
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fn accepts(setup: &Setup, prev: Option<Card>, next: Card) -> bool {
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