626 lines
23 KiB
Rust
626 lines
23 KiB
Rust
//! # Play a TricTrac Game
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use crate::board::{Board, CheckerMove, Field, EMPTY_MOVE};
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use crate::dice::Dice;
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use crate::game::GameState;
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use crate::player::Color;
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use std::cmp;
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#[derive(std::cmp::PartialEq, Debug)]
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pub enum MoveError {
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// 2 checkers must go at the same time on an empty corner
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// & the last 2 checkers of a corner must leave at the same time
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CornerNeedsTwoCheckers,
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// Prise de coin de repos par puissance alors qu'il est possible
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// de le prendre directement (par "effet")
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CornerByEffectPossible,
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// toutes les dames doivent être dans le jan de retour
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ExitNeedsAllCheckersOnLastQuarter,
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// mouvement avec nombre en exédant alors qu'une séquence de mouvements
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// sans nombre en excédant est possible
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ExitByEffectPossible,
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// Sortie avec nombre en excédant d'une dame qui n'est pas la plus éloignée
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ExitNotFasthest,
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// Jeu dans un cadran que l'adversaire peut encore remplir
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OpponentCanFillQuarter,
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// remplir cadran si possible & conserver cadran rempli si possible ----
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MustFillQuarter,
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}
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pub trait MoveRules {
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fn board(&self) -> &Board;
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fn dice(&self) -> &Dice;
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fn moves_possible(&self, color: &Color, moves: &(CheckerMove, CheckerMove)) -> bool {
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// Check move is physically possible
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if !self.board().move_possible(color, &moves.0) {
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return false;
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}
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// Chained_move : "Tout d'une"
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if let Ok(chained_move) = moves.0.chain(moves.1) {
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if !self.board().move_possible(color, &chained_move) {
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return false;
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}
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} else if !self.board().move_possible(color, &moves.1) {
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return false;
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}
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true
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}
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fn get_move_compatible_dices(&self, color: &Color, cmove: &CheckerMove) -> Vec<u8> {
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let (dice1, dice2) = self.dice().values;
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let mut move_dices = Vec::new();
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if cmove.get_to() == 0 {
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// handle empty move (0, 0) only one checker left, exiting with the first die.
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if cmove.get_from() == 0 {
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move_dices.push(dice1);
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move_dices.push(dice2);
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return move_dices;
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}
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// Exits
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let min_dist = match color {
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Color::White => 25 - cmove.get_from(),
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Color::Black => cmove.get_from(),
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};
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if dice1 as usize >= min_dist {
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move_dices.push(dice1);
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}
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if dice2 as usize >= min_dist {
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move_dices.push(dice2);
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}
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} else {
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let dist = (cmove.get_to() as i8 - cmove.get_from() as i8).unsigned_abs();
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if dice1 == dist {
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move_dices.push(dice1);
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}
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if dice2 == dist {
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move_dices.push(dice2);
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}
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}
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move_dices
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}
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fn moves_follows_dices(&self, color: &Color, moves: &(CheckerMove, CheckerMove)) -> bool {
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// Prise de coin par puissance
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if self.is_move_by_puissance(color, moves) {
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return true;
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}
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let (dice1, dice2) = self.dice().values;
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let (move1, move2): &(CheckerMove, CheckerMove) = moves;
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let move1_dices = self.get_move_compatible_dices(color, move1);
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if move1_dices.is_empty() {
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return false;
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}
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let move2_dices = self.get_move_compatible_dices(color, move2);
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if move2_dices.is_empty() {
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return false;
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}
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if move1_dices.len() == 1
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&& move2_dices.len() == 1
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&& move1_dices[0] == move2_dices[0]
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&& dice1 != dice2
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{
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return false;
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}
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// no rule was broken
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true
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}
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fn moves_allowed(
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&self,
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color: &Color,
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moves: &(CheckerMove, CheckerMove),
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) -> Result<(), MoveError> {
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// ------- corner rules ----------
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let corner_field: Field = self.board().get_color_corner(color);
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let (corner_count, _color) = self.board().get_field_checkers(corner_field).unwrap();
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let (from0, to0, from1, to1) = (
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moves.0.get_from(),
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moves.0.get_to(),
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moves.1.get_from(),
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moves.1.get_to(),
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);
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// 2 checkers must go at the same time on an empty corner
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if (to0 == corner_field || to1 == corner_field) && (to0 != to1) && corner_count == 0 {
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return Err(MoveError::CornerNeedsTwoCheckers);
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}
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// the last 2 checkers of a corner must leave at the same time
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if (from0 == corner_field || from1 == corner_field) && (from0 != from1) && corner_count == 2
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{
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return Err(MoveError::CornerNeedsTwoCheckers);
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}
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if self.is_move_by_puissance(color, moves) && self.can_take_corner_by_effect(color) {
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return Err(MoveError::CornerByEffectPossible);
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}
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// check exit rules
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if moves.0.get_to() == 0 || moves.1.get_to() == 0 {
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// toutes les dames doivent être dans le jan de retour
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let has_outsiders = !self
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.board()
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.get_color_fields(*color)
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.iter()
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.filter(|(field, _count)| {
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(*color == Color::White && *field < 19)
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|| (*color == Color::Black && *field > 6)
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})
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.collect::<Vec<&(usize, i8)>>()
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.is_empty();
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if has_outsiders {
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return Err(MoveError::ExitNeedsAllCheckersOnLastQuarter);
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}
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// toutes les sorties directes sont autorisées, ainsi que les nombre défaillants
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let possible_moves_sequences = self.get_possible_moves_sequences(color);
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if !possible_moves_sequences.contains(moves) {
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// À ce stade au moins un des déplacements concerne un nombre en excédant
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// - si d'autres séquences de mouvements sans nombre en excédant étaient possibles, on
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// refuse cette séquence
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if !possible_moves_sequences.is_empty() {
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return Err(MoveError::ExitByEffectPossible);
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}
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// - la dame choisie doit être la plus éloignée de la sortie
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let mut checkers = self.board().get_color_fields(*color);
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checkers.sort_by(|a, b| {
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if *color == Color::White {
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b.0.cmp(&a.0)
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} else {
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a.0.cmp(&b.0)
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}
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});
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let mut farthest = if *color == Color::White { 24 } else { 1 };
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let mut next_farthest = if *color == Color::White { 24 } else { 1 };
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let mut has_two_checkers = false;
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if let Some((field, count)) = checkers.first() {
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farthest = *field;
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if *count > 1 {
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next_farthest = *field;
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has_two_checkers = true;
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} else if let Some((field, _count)) = checkers.get(1) {
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next_farthest = *field;
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has_two_checkers = true;
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}
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}
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// s'il reste au moins deux dames, on vérifie que les plus éloignées soint choisies
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if has_two_checkers {
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if moves.0.get_to() == 0 && moves.1.get_to() == 0 {
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// Deux coups sortants en excédant
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if *color == Color::White {
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if cmp::max(moves.0.get_from(), moves.1.get_from()) > next_farthest {
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return Err(MoveError::ExitNotFasthest);
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}
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} else if cmp::min(moves.0.get_from(), moves.1.get_from()) < next_farthest {
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return Err(MoveError::ExitNotFasthest);
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}
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} else {
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// Un seul coup sortant en excédant le coup sortant doit concerner la plus éloignée du bord
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let exit_move_field = if moves.0.get_to() == 0 {
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moves.0.get_from()
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} else {
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moves.1.get_from()
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};
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if exit_move_field != farthest {
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return Err(MoveError::ExitNotFasthest);
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}
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}
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}
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}
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}
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// --- interdit de jouer dans cadran que l'adversaire peut encore remplir ----
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let farthest = if *color == Color::White {
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cmp::max(moves.0.get_to(), moves.1.get_to())
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} else {
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cmp::min(moves.0.get_to(), moves.1.get_to())
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};
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let in_opponent_side = if *color == Color::White {
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farthest > 12
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} else {
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farthest < 13
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};
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if in_opponent_side
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&& self
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.board()
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.is_quarter_fillable(color.opponent_color(), farthest)
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{
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return Err(MoveError::OpponentCanFillQuarter);
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}
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// --- remplir cadran si possible & conserver cadran rempli si possible ----
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let filling_moves_sequences = self.get_quarter_filling_moves_sequences(color);
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if !filling_moves_sequences.contains(moves) && !filling_moves_sequences.is_empty() {
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return Err(MoveError::MustFillQuarter);
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}
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// no rule was broken
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Ok(())
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}
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fn get_possible_moves_sequences(&self, color: &Color) -> Vec<(CheckerMove, CheckerMove)> {
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let (dice1, dice2) = self.dice().values;
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let mut moves_seqs = self.get_possible_moves_sequences_by_dices(color, dice1, dice2);
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let mut moves_seqs_order2 = self.get_possible_moves_sequences_by_dices(color, dice1, dice2);
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moves_seqs.append(&mut moves_seqs_order2);
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moves_seqs
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}
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fn get_quarter_filling_moves_sequences(
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&self,
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color: &Color,
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) -> Vec<(CheckerMove, CheckerMove)> {
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let mut moves_seqs = Vec::new();
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for moves in self.get_possible_moves_sequences(color) {
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let mut board = self.board().clone();
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board.move_checker(color, moves.0).unwrap();
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board.move_checker(color, moves.1).unwrap();
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if board.any_quarter_filled(*color) {
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moves_seqs.push(moves);
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}
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}
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moves_seqs
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}
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fn get_possible_moves_sequences_by_dices(
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&self,
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color: &Color,
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dice1: u8,
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dice2: u8,
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) -> Vec<(CheckerMove, CheckerMove)> {
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let mut moves_seqs = Vec::new();
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for first_move in self.board().get_possible_moves(*color, dice1, false) {
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let mut board2 = self.board().clone();
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if board2.move_checker(color, first_move).is_err() {
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println!("err move");
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continue;
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}
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if board2.get_color_fields(*color).is_empty() {
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// no checkers left : empty move
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println!("empty move");
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moves_seqs.push((first_move, EMPTY_MOVE));
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} else {
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for second_move in board2.get_possible_moves(*color, dice2, false) {
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moves_seqs.push((first_move, second_move));
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}
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}
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}
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moves_seqs
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}
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fn get_direct_exit_moves(&self, state: &GameState, color: &Color) -> Vec<CheckerMove> {
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let mut moves = Vec::new();
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let (dice1, dice2) = state.dice.values;
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// sorties directes simples
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let (field1_candidate, field2_candidate) = if color == &Color::White {
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(25 - dice1 as usize, 25 - dice2 as usize)
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} else {
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(dice1 as usize, dice2 as usize)
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};
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let (count1, col1) = state.board.get_field_checkers(field1_candidate).unwrap();
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let (count2, col2) = state.board.get_field_checkers(field2_candidate).unwrap();
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if count1 > 0 {
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moves.push(CheckerMove::new(field1_candidate, 0).unwrap());
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}
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if dice2 != dice1 {
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if count2 > 0 {
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moves.push(CheckerMove::new(field2_candidate, 0).unwrap());
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}
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} else if count1 > 1 {
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// doublet et deux dames disponibles
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moves.push(CheckerMove::new(field1_candidate, 0).unwrap());
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}
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// sortie directe tout d'une
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let fieldall_candidate = if color == &Color::White {
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25 - dice1 - dice2
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} else {
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dice1 + dice2
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} as usize;
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let (countall, _col) = state.board.get_field_checkers(fieldall_candidate).unwrap();
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if countall > 0 {
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if col1.is_none() || col1 == Some(color) {
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moves.push(CheckerMove::new(fieldall_candidate, field1_candidate).unwrap());
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moves.push(CheckerMove::new(field1_candidate, 0).unwrap());
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}
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if col2.is_none() || col2 == Some(color) {
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moves.push(CheckerMove::new(fieldall_candidate, field2_candidate).unwrap());
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moves.push(CheckerMove::new(field2_candidate, 0).unwrap());
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}
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}
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moves
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}
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fn is_move_by_puissance(&self, color: &Color, moves: &(CheckerMove, CheckerMove)) -> bool {
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let (dice1, dice2) = self.dice().values;
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let (move1, move2): &(CheckerMove, CheckerMove) = moves;
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let dist1 = (move1.get_to() as i8 - move1.get_from() as i8).unsigned_abs();
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let dist2 = (move2.get_to() as i8 - move2.get_from() as i8).unsigned_abs();
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// Both corners must be empty
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let (count1, _color) = self.board().get_field_checkers(12).unwrap();
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let (count2, _color2) = self.board().get_field_checkers(13).unwrap();
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if count1 > 0 || count2 > 0 {
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return false;
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}
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move1.get_to() == move2.get_to()
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&& move1.get_to() == self.board().get_color_corner(color)
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&& ((*color == Color::White
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&& cmp::min(dist1, dist2) == cmp::min(dice1, dice2) - 1
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&& cmp::max(dist1, dist2) == cmp::max(dice1, dice2) - 1)
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|| (*color == Color::Black
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&& cmp::min(dist1, dist2) == cmp::min(dice1, dice2) + 1
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&& cmp::max(dist1, dist2) == cmp::max(dice1, dice2) + 1))
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}
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fn can_take_corner_by_effect(&self, color: &Color) -> bool {
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// return false if corner already taken
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let corner_field: Field = self.board().get_color_corner(color);
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let (count, _col) = self.board().get_field_checkers(corner_field).unwrap();
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if count > 0 {
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return false;
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}
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let (dice1, dice2) = self.dice().values;
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let (field1, field2) = match color {
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Color::White => (12 - dice1, 12 - dice2),
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Color::Black => (13 + dice1, 13 + dice2),
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};
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let res1 = self.board().get_field_checkers(field1.into());
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let res2 = self.board().get_field_checkers(field2.into());
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if res1.is_err() || res2.is_err() {
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return false;
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}
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let (count1, opt_color1) = res1.unwrap();
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let (count2, opt_color2) = res2.unwrap();
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count1 > 0 && count2 > 0 && opt_color1 == Some(color) && opt_color2 == Some(color)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn can_take_corner_by_effect() {
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let mut state = GameState::default();
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state.board.set_positions([
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10, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -15,
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]);
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state.dice.values = (4, 4);
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assert!(state.can_take_corner_by_effect(&Color::White));
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state.dice.values = (5, 5);
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assert!(!state.can_take_corner_by_effect(&Color::White));
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state.board.set_positions([
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10, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -15,
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]);
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state.dice.values = (4, 4);
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assert!(!state.can_take_corner_by_effect(&Color::White));
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state.board.set_positions([
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10, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, -13,
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]);
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state.dice.values = (1, 1);
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assert!(state.can_take_corner_by_effect(&Color::Black));
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}
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#[test]
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fn prise_en_puissance() {
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let mut state = GameState::default();
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// prise par puissance ok
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state.board.set_positions([
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10, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -15,
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]);
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state.dice.values = (5, 5);
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let moves = (
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CheckerMove::new(8, 12).unwrap(),
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CheckerMove::new(8, 12).unwrap(),
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);
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assert!(state.is_move_by_puissance(&Color::White, &moves));
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assert!(state.moves_follows_dices(&Color::White, &moves));
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assert!(state.moves_allowed(&Color::White, &moves).is_ok());
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// opponent corner must be empty
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state.board.set_positions([
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10, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -13,
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]);
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assert!(!state.is_move_by_puissance(&Color::White, &moves));
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assert!(!state.moves_follows_dices(&Color::White, &moves));
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// Si on a la possibilité de prendre son coin à la fois par effet, c'est à dire naturellement, et aussi par puissance, on doit le prendre par effet
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state.board.set_positions([
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5, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -15,
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]);
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assert_eq!(
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Err(MoveError::CornerByEffectPossible),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
|
|
// on a déjà pris son coin : on ne peux plus y deplacer des dames par puissance
|
|
state.board.set_positions([
|
|
8, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -15,
|
|
]);
|
|
assert!(!state.is_move_by_puissance(&Color::White, &moves));
|
|
assert!(!state.moves_follows_dices(&Color::White, &moves));
|
|
}
|
|
|
|
#[test]
|
|
fn exit() {
|
|
let mut state = GameState::default();
|
|
// exit ok
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
);
|
|
assert!(state.moves_follows_dices(&Color::White, &moves));
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
|
|
// toutes les dames doivent être dans le jan de retour
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::ExitNeedsAllCheckersOnLastQuarter),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
|
|
// on ne peut pas sortir une dame avec un nombre excédant si on peut en jouer une avec un nombre défaillant
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 0, 0, 2, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
CheckerMove::new(23, 0).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::ExitByEffectPossible),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
|
|
// on doit jouer le nombre excédant le plus éloigné
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
CheckerMove::new(23, 0).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::ExitNotFasthest),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
let moves = (
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
CheckerMove::new(20, 0).unwrap(),
|
|
);
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
|
|
// Cas de la dernière dame
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(23, 0).unwrap(),
|
|
CheckerMove::new(0, 0).unwrap(),
|
|
);
|
|
assert!(state.moves_follows_dices(&Color::White, &moves));
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
}
|
|
|
|
#[test]
|
|
fn move_check_opponent_fillable_quarter() {
|
|
let mut state = GameState::default();
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(11, 16).unwrap(),
|
|
CheckerMove::new(11, 16).unwrap(),
|
|
);
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
|
|
state.board.set_positions([
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, -12, 0, 0, 0, 0, 1, 0,
|
|
]);
|
|
state.dice.values = (5, 5);
|
|
let moves = (
|
|
CheckerMove::new(11, 16).unwrap(),
|
|
CheckerMove::new(11, 16).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::OpponentCanFillQuarter),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn move_check_fillable_quarter() {
|
|
let mut state = GameState::default();
|
|
state.board.set_positions([
|
|
3, 3, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0,
|
|
]);
|
|
state.dice.values = (5, 4);
|
|
let moves = (
|
|
CheckerMove::new(1, 6).unwrap(),
|
|
CheckerMove::new(2, 6).unwrap(),
|
|
);
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
let moves = (
|
|
CheckerMove::new(1, 5).unwrap(),
|
|
CheckerMove::new(2, 7).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::MustFillQuarter),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
|
|
state.board.set_positions([
|
|
2, 3, 2, 2, 3, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
]);
|
|
state.dice.values = (2, 3);
|
|
let moves = (
|
|
CheckerMove::new(6, 8).unwrap(),
|
|
CheckerMove::new(6, 9).unwrap(),
|
|
);
|
|
assert_eq!(
|
|
Err(MoveError::MustFillQuarter),
|
|
state.moves_allowed(&Color::White, &moves)
|
|
);
|
|
let moves = (
|
|
CheckerMove::new(2, 4).unwrap(),
|
|
CheckerMove::new(5, 8).unwrap(),
|
|
);
|
|
assert!(state.moves_allowed(&Color::White, &moves).is_ok());
|
|
}
|
|
|
|
#[test]
|
|
fn moves_possible() {
|
|
let state = GameState::default();
|
|
|
|
// Chained moves
|
|
let moves = (
|
|
CheckerMove::new(1, 5).unwrap(),
|
|
CheckerMove::new(5, 9).unwrap(),
|
|
);
|
|
assert!(state.moves_possible(&Color::White, &moves));
|
|
|
|
// not chained moves
|
|
let moves = (
|
|
CheckerMove::new(1, 5).unwrap(),
|
|
CheckerMove::new(6, 9).unwrap(),
|
|
);
|
|
assert!(!state.moves_possible(&Color::White, &moves));
|
|
|
|
// black moves
|
|
let moves = (
|
|
CheckerMove::new(24, 20).unwrap(),
|
|
CheckerMove::new(20, 19).unwrap(),
|
|
);
|
|
assert!(state.moves_possible(&Color::Black, &moves));
|
|
}
|
|
}
|