95 lines
2.6 KiB
TypeScript
95 lines
2.6 KiB
TypeScript
/** 주사위판 위를 이동하는 말. */
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export class Chessman {
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private index: number;
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private readonly boardLength: number;
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/** 1: 시계방향, -1: 반시계방향 */
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private direction: 1 | -1 = 1;
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/** 무인도: 남은 대기 턴, 탈출 가능 눈 */
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private island: { turnsLeft: number; escapeOn: number } | null = null;
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constructor(boardLength: number, startIndex = 0) {
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if (boardLength <= 0) {
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throw new Error('Chessman boardLength must be positive');
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}
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this.boardLength = boardLength;
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this.index = ((startIndex % boardLength) + boardLength) % boardLength;
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}
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get position(): number {
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return this.index;
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}
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get facing(): 1 | -1 {
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return this.direction;
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}
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get isOnIsland(): boolean {
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return this.island != null;
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}
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get islandTurnsLeft(): number {
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return this.island?.turnsLeft ?? 0;
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}
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reverseDirection(): 1 | -1 {
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this.direction = this.direction === 1 ? -1 : 1;
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return this.direction;
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}
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enterIsland(turns: number, escapeOn = 6) {
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this.island = { turnsLeft: Math.max(1, Math.trunc(turns)), escapeOn };
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}
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clearIsland() {
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this.island = null;
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}
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/**
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* 무인도 상태에서의 주사위 처리.
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* - escape: escapeOn(기본 6)이 한 면이라도 나오면 탈출 → 이후 정상 이동
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* - wait: 턴 소모 후 대기 (turnsLeft 0이면 자동 해제, 이번 턴은 이동 없음)
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* - free: 이미 무인도 아님
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*/
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resolveIslandRoll(roll: number, faces?: number[]): 'escape' | 'wait' | 'free' {
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if (!this.island) return 'free';
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const values = faces && faces.length > 0 ? faces : [roll];
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if (values.some((value) => value === this.island!.escapeOn)) {
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this.island = null;
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return 'escape';
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}
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this.island.turnsLeft -= 1;
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if (this.island.turnsLeft <= 0) {
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this.island = null;
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}
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return 'wait';
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}
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teleport(index: number): number {
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this.index = ((index % this.boardLength) + this.boardLength) % this.boardLength;
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return this.index;
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}
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moveOne(): number {
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return this.move(1);
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}
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/** steps칸만큼 현재 방향으로 이동 */
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move(steps: number): number {
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const amount = Math.trunc(steps);
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if (amount === 0) return this.index;
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const delta = amount * this.direction;
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this.index = (this.index + delta) % this.boardLength;
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if (this.index < 0) this.index += this.boardLength;
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return this.index;
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}
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reset(startIndex = 0): number {
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this.index = ((startIndex % this.boardLength) + this.boardLength) % this.boardLength;
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this.direction = 1;
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this.island = null;
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return this.index;
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}
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}
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