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* @author Timo lehnertz
*/
import { AllPlayerStates } from "./AllPlayerStates";
import { Board } from "./Board";
import { GameState } from "./GameState";
import { Heading } from "./Heading";
import { Move } from "./Move";
import { PathTile, TileType } from "./PathTile";
import { PlayerState } from "./PlayerState";
import { RandomNumberGenerator } from "./RandomNumberGenerator";
import { ShiftPosition } from "./ShiftPosition";
import { Treasure } from "./Treasure";
export interface CardRatios {
lCards: number;
streightCards: number;
tCards: number;
}
export interface TreasureCardChances {
lCardTreasureChance: number;
streightCardTreasureChance: number;
tCardTreasureChance: number;
fixCardTreasureChance: number;
}
export interface GameSetup {
seed: string;
playerCount: number;
boardWidth: number;
boardHeight: number;
cardsRatio: CardRatios;
treasureCardChances: TreasureCardChances;
}
export type GameTileType = "fix" | "homePoint" | TileType;
export interface PlayerListener {
yourTurn: (gameState: GameState, move: (move: Move) => boolean) => void;
}
export interface WinListener {
gameEnded: (winnerIndex: number) => void;
}
/**
* Game class representing a game
*/
export class Game {
// Game state
private _gameState: GameState;
// stuff
private redoHistory: Move[] = [];
private constructor(gameState: GameState) {
this._gameState = gameState;
}
/**
* Game Logic -------------------
*/
public move(move: Move) {
Iif (this.redoHistory.length > 0) {
throw new Error("redo all moves before moving a new move");
}
Iif (this._gameState.getWinnerIndex() !== null) {
throw new Error("cant move after game has ended");
}
this._gameState.validateMove(move); // throws on error
this._gameState = this._gameState.move(move);
this.redoHistory = [];
}
public undoLastMove() {
const result = this._gameState.undoMove();
this._gameState = result.newGameState;
this.redoHistory.push(result.undoneMove);
}
public redoLastMove() {
const redoMove = this.redoHistory.pop();
Iif (redoMove === undefined) {
throw new Error("no move to redo");
}
this._gameState = this._gameState.move(redoMove);
}
public get gameState(): GameState {
return this._gameState;
}
/**
* Setup logic
*/
public static getDefaultSetup(): GameSetup {
return {
playerCount: 4,
seed: "seed",
boardHeight: 7,
boardWidth: 7,
cardsRatio: {
lCards: 15 / 34,
streightCards: 13 / 34,
tCards: 6 / 34,
},
treasureCardChances: {
lCardTreasureChance: 6 / 15,
streightCardTreasureChance: 0,
tCardTreasureChance: 1,
fixCardTreasureChance: 1,
},
};
}
public static finalizeSetup(setup?: Partial<GameSetup>): GameSetup {
const defaultSetup = Game.getDefaultSetup();
const finalSetup = {
boardHeight: setup?.boardHeight ?? defaultSetup.boardHeight,
boardWidth: setup?.boardWidth ?? defaultSetup.boardWidth,
cardsRatio: setup?.cardsRatio ?? defaultSetup.cardsRatio,
playerCount: setup?.playerCount ?? defaultSetup.playerCount,
seed: setup?.seed ?? defaultSetup.seed,
treasureCardChances:
setup?.treasureCardChances ?? defaultSetup.treasureCardChances,
};
Iif (
!Board.isSizeValid(finalSetup.boardWidth) ||
!Board.isSizeValid(finalSetup.boardHeight)
) {
throw new Error(`Invalid board size`);
}
const maxPlayers = Board.getMaxPlayerCount(
finalSetup.boardWidth,
finalSetup.boardHeight
);
Iif (finalSetup.playerCount > maxPlayers) {
throw new Error(`Too many players. Max ${maxPlayers}`);
}
Iif (finalSetup.playerCount < 2) {
throw new Error("Too few players. Min 2");
}
return finalSetup;
}
public static buildFromSetup(partialSetup?: Partial<GameSetup>): Game {
// apply defaults
const setup = Game.finalizeSetup(partialSetup);
const generator = new RandomNumberGenerator(setup.seed);
const treasures = Game.generateTreasures(
Game.getTreasureCount(setup.playerCount)
);
const allPlayerStates = Game.generatePlayerStates(
generator,
setup.playerCount,
treasures,
setup.boardWidth,
setup.boardHeight
);
const board = Game.generateRandomBoard(
generator,
treasures,
setup.boardWidth,
setup.boardHeight,
setup.cardsRatio,
setup.treasureCardChances
);
const gameState = new GameState(board, allPlayerStates, []);
return new Game(gameState);
}
private static getTreasureCount(playerCount: number): number {
if (playerCount <= 4) {
return 24;
} else E{
return playerCount * 6;
}
}
private static generateRandomBoard(
generator: RandomNumberGenerator,
treasures: Treasure[],
width: number,
height: number,
cardsRatios: CardRatios,
treasureCardChances: TreasureCardChances
) {
// create board tile placeholders
const tiles: (PathTile | null)[][] = [];
for (let x = 0; x < width; x++) {
const column: (PathTile | null)[] = [];
for (let y = 0; y < height; y++) {
column[y] = null;
}
tiles.push(column);
}
// fill corners
tiles[0][0] = new PathTile(TileType.L, null, 0, null);
tiles[width - 1][0] = new PathTile(TileType.L, null, 1, null);
tiles[width - 1][height - 1] = new PathTile(TileType.L, null, 2, null);
tiles[0][height - 1] = new PathTile(TileType.L, null, 3, null);
// get generator
const getRandomTreasure = Game.getRandomTreasureProvider(
generator,
treasures,
treasureCardChances
);
const homePoints = Board.generatePlayerHomePositions(width, height);
function isHome(x: number, y: number): boolean {
for (const homePoint of homePoints) {
Iif (homePoint.x === x && homePoint.y === y) {
return true;
}
}
return false;
}
//
// fill fix edges
// NORTH
for (let x = 2; x < width - 2; x += 2) {
tiles[x][0] = new PathTile(
TileType.T,
getRandomTreasure(isHome(x, 0) ? "homePoint" : "fix"),
2,
null
);
}
// EAST
for (let y = 2; y < height - 2; y += 2) {
tiles[width - 1][y] = new PathTile(
TileType.T,
getRandomTreasure(isHome(width - 1, y) ? "homePoint" : "fix"),
3,
null
);
}
// SOUTH
for (let x = 2; x < width - 2; x += 2) {
tiles[x][height - 1] = new PathTile(
TileType.T,
getRandomTreasure(isHome(x, height - 1) ? "homePoint" : "fix"),
0,
null
);
}
// WEST
for (let y = 2; y < height - 2; y += 2) {
tiles[0][y] = new PathTile(
TileType.T,
getRandomTreasure(isHome(0, y) ? "homePoint" : "fix"),
1,
null
);
}
// fill fix center
for (let x = 2; x < width - 2; x += 2) {
for (let y = 2; y < height - 2; y += 2) {
tiles[x][y] = new PathTile(
TileType.T,
getRandomTreasure(isHome(x, y) ? "homePoint" : "fix"),
Math.floor(generator.rand() * 4),
null
);
}
}
// fill remaining
const treasureCandidates: ({ x: number; y: number } | "loose-tile")[][] = [
[], // T cards
[], // L cards
[], // Streight cards
];
const tileTypes = [TileType.T, TileType.L, TileType.STREIGHT];
function idxFromTileType(tileType: TileType): number {
switch (tileType) {
case TileType.T:
return 0;
case TileType.L:
return 1;
case TileType.STREIGHT:
return 2;
}
}
for (let x = 0; x < width; x++) {
for (let y = 0; y < height; y++) {
if (tiles[x][y] === null) {
const pathTile = new PathTile(
Game.generateRandomTileType(generator),
null,
Math.floor(generator.rand() * 4),
null
);
tiles[x][y] = pathTile;
treasureCandidates[idxFromTileType(pathTile.tileType)].push({ x, y });
}
}
}
let looseTile = new PathTile(
Game.generateRandomTileType(generator),
null,
Math.floor(generator.rand() * 4),
null
);
treasureCandidates[idxFromTileType(looseTile.tileType)].push("loose-tile");
// distribute remaining treasures
for (let i = 0; i < treasureCandidates.length; i++) {
const treasureCandidatesOfType = treasureCandidates[i];
for (const chosenCandidate of treasureCandidatesOfType) {
const treasure = getRandomTreasure(tileTypes[i]);
if (chosenCandidate === "loose-tile") {
looseTile = looseTile.setTreasure(treasure);
} else {
tiles[chosenCandidate.x][chosenCandidate.y] =
tiles[chosenCandidate.x][chosenCandidate.y]?.setTreasure(
treasure
) ?? null;
}
}
}
// set homePoints
for (let i = 0; i < homePoints.length; i++) {
const homePoint = homePoints[i];
tiles[homePoint.x][homePoint.y] =
tiles[homePoint.x][homePoint.y]?.setHomeOfPlayerIndex(i) ?? null;
}
const startingShiftPosition = new ShiftPosition(Heading.NORTH, 0);
return new Board(tiles as PathTile[][], looseTile, startingShiftPosition);
}
private static generateRandomTileType(
generator: RandomNumberGenerator
): TileType {
const rand = generator.rand() * 3;
if (rand < 1) {
return TileType.L;
} else if (rand < 2) {
return TileType.T;
} else {
return TileType.STREIGHT;
}
}
public static getRandomTreasureProvider(
generator: RandomNumberGenerator,
treasures: Treasure[],
treasureCardChances?: TreasureCardChances
): (cardType?: GameTileType) => Treasure | null {
const remainingTreasures: Treasure[] = [];
for (const treasure of treasures) {
remainingTreasures.push(treasure);
}
function getRandomTreasure(cardType?: GameTileType): Treasure | null {
let skipChance = 0;
if (treasureCardChances !== undefined && cardType !== undefined) {
switch (cardType) {
case TileType.L:
skipChance = 1 - treasureCardChances.lCardTreasureChance;
break;
case TileType.T:
skipChance = 1 - treasureCardChances.tCardTreasureChance;
break;
case TileType.STREIGHT:
skipChance = 1 - treasureCardChances.streightCardTreasureChance;
break;
case "fix":
skipChance = 1 - treasureCardChances.fixCardTreasureChance;
break;
case "homePoint":
skipChance = 1;
break;
}
}
const rand = generator.rand();
if (rand < skipChance) {
return null;
}
const index = Math.floor(
Math.min(0.99, rand) * remainingTreasures.length
);
if (index >= remainingTreasures.length) {
return null;
}
const randomTreasure = remainingTreasures[index];
remainingTreasures.splice(index, 1);
return randomTreasure;
}
return getRandomTreasure;
}
/**
* @param numberOfPlayers Has to be either 2, 3 or 4
*/
private static generatePlayerStates(
generator: RandomNumberGenerator,
numberOfPlayers: number,
treasures: Treasure[],
boardWidth: number,
boardHeight: number
): AllPlayerStates {
// generate treasures
const getRandomTreasure = Game.getRandomTreasureProvider(
generator,
treasures
);
const treasuresPerPlayer = treasures.length / numberOfPlayers;
// distribute all treasures evenly to all players
const allPlayersTreasures: Treasure[][] = [];
for (let i = 0; i < numberOfPlayers; i++) {
const playerTreasures: Treasure[] = [];
for (let i = 0; i < treasuresPerPlayer; i++) {
const treasure = getRandomTreasure();
if (treasure) {
playerTreasures.push(treasure);
}
}
allPlayersTreasures.push(playerTreasures);
}
// create playerStates
const playerStates: PlayerState[] = [];
for (let i = 0; i < allPlayersTreasures.length; i++) {
const playersTreasures = allPlayersTreasures[i];
const currentTreasure = playersTreasures.pop() ?? null;
const playerStartPosition = Board.getPlayerHomePosition(
i,
boardWidth,
boardHeight
);
playerStates.push(
new PlayerState(
[],
playersTreasures,
currentTreasure,
playerStartPosition
)
);
}
return new AllPlayerStates(playerStates, 0);
}
public static generateTreasures(amount: number): Treasure[] {
const treasures: Treasure[] = [];
for (let i = 0; i < amount; i++) {
treasures.push(new Treasure(i));
}
return treasures;
}
public static buildFromString(str: string): Game {
const obj = JSON.parse(str);
Iif (!("gameState" in obj)) {
throw new Error("Invalid game string");
}
return new Game(GameState.create(obj.gameState));
}
public stringify(): string {
return JSON.stringify({
gameState: this._gameState,
});
}
}
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