462 lines
11 KiB
TypeScript
462 lines
11 KiB
TypeScript
/**
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* -AI-
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* Botのバックエンド(思考を担当)
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*
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* 対話と思考を同じプロセスで行うと、思考時間が長引いたときにストリームから
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* 切断されてしまうので、別々のプロセスで行うようにします
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*/
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import 'module-alias/register';
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import * as request from 'request-promise-native';
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import Reversi, { Color } from 'misskey-reversi';
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import config from '@/config';
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import serifs from '@/serifs';
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import { User } from '@/misskey/user';
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const db = {};
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function getUserName(user) {
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return user.name || user.username;
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}
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const titles = [
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'さん', 'サン', 'ｻﾝ', '㌠',
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'ちゃん', 'チャン', 'ﾁｬﾝ',
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'君', 'くん', 'クン', 'ｸﾝ',
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'先生', 'せんせい', 'センセイ', 'ｾﾝｾｲ'
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];
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class Session {
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private account: User;
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private game: any;
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private form: any;
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private o: Reversi;
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private botColor: Color;
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/**
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* 各マスの強さ (-1.0 ~ 1.0)
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*/
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private cellWeights: number[];
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/**
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* 対局が開始したことを知らせた投稿
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*/
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private startedNote: any = null;
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private get user(): User {
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return this.game.user1Id == this.account.id ? this.game.user2 : this.game.user1;
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}
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private get userName(): string {
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const name = getUserName(this.user);
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return `?[${name}](${config.host}/@${this.user.username})${titles.some(x => name.endsWith(x)) ? '' : 'さん'}`;
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}
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private get strength(): number {
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return this.form.find(i => i.id == 'strength').value;
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}
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private get isSettai(): boolean {
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return this.strength === 0;
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}
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private get allowPost(): boolean {
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return this.form.find(i => i.id == 'publish').value;
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}
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private get url(): string {
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return `${config.host}/games/reversi/${this.game.id}`;
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}
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constructor() {
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process.on('message', this.onMessage);
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}
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private onMessage = async (msg: any) => {
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switch (msg.type) {
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case '_init_': this.onInit(msg.body); break;
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case 'updateForm': this.onUpdateForn(msg.body); break;
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case 'started': this.onStarted(msg.body); break;
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case 'ended': this.onEnded(msg.body); break;
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case 'set': this.onSet(msg.body); break;
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}
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}
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// 親プロセスからデータをもらう
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private onInit = (msg: any) => {
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this.game = msg.game;
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this.form = msg.form;
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this.account = msg.account;
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}
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/**
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* フォームが更新されたとき
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*/
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private onUpdateForn = (msg: any) => {
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this.form.find(i => i.id == msg.id).value = msg.value;
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}
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/**
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* 対局が始まったとき
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*/
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private onStarted = (msg: any) => {
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this.game = msg;
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// TLに投稿する
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this.postGameStarted().then(note => {
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this.startedNote = note;
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});
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// リバーシエンジン初期化
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this.o = new Reversi(this.game.map, {
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isLlotheo: this.game.isLlotheo,
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canPutEverywhere: this.game.canPutEverywhere,
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loopedBoard: this.game.loopedBoard
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});
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//#region 各マスの価値を計算しておく
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// 標準的な 8*8 のマップなら予め定義した価値マップを使用
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if (this.o.mapWidth == 8 && this.o.mapHeight == 8 && !this.o.map.some(p => p == 'null')) {
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this.cellWeights = [
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1 , -0.4, 0 , -0.1, -0.1, 0 , -0.4, 1 ,
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-0.4, -0.5, -0.2, -0.2, -0.2, -0.2, -0.5, -0.4,
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0 , -0.2, 0 , -0.1, -0.1, 0 , -0.2, 0 ,
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-0.1, -0.2, -0.1, -0.1, -0.1, -0.1, -0.2, -0.1,
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-0.1, -0.2, -0.1, -0.1, -0.1, -0.1, -0.2, -0.1,
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0 , -0.2, 0 , -0.1, -0.1, 0 , -0.2, 0 ,
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-0.4, -0.5, -0.2, -0.2, -0.2, -0.2, -0.5, -0.4,
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1 , -0.4, 0 , -0.1, -0.1, 0 , -0.4, 1
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];
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} else {
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//#region 隅
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this.cellWeights = this.o.map.map((pix, i) => {
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if (pix == 'null') return 0;
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const [x, y] = this.o.transformPosToXy(i);
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let count = 0;
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const get = (x, y) => {
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if (x < 0 || y < 0 || x >= this.o.mapWidth || y >= this.o.mapHeight) return 'null';
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return this.o.mapDataGet(this.o.transformXyToPos(x, y));
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};
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const isNotSumi = (
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// -
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// +
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// -
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(get(x - 1, y - 1) == 'empty' && get(x + 1, y + 1) == 'empty') ||
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// -
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// +
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// -
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(get(x, y - 1) == 'empty' && get(x, y + 1) == 'empty') ||
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// -
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// +
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// -
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(get(x + 1, y - 1) == 'empty' && get(x - 1, y + 1) == 'empty') ||
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//
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// -+-
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//
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(get(x - 1, y) == 'empty' && get(x + 1, y) == 'empty')
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)
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const isSumi = !isNotSumi;
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return isSumi ? 1 : 0;
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});
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//#endregion
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//#region 隅の隣は危険
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this.cellWeights.forEach((cell, i) => {
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const [x, y] = this.o.transformPosToXy(i);
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if (cell === 1) return;
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if (this.o.mapDataGet(this.o.transformXyToPos(x, y)) == 'null') return;
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const get = (x, y) => {
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if (x < 0 || y < 0 || x >= this.o.mapWidth || y >= this.o.mapHeight) return 0;
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return this.cellWeights[this.o.transformXyToPos(x, y)];
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};
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const isSumiNear = (
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(get(x - 1, y - 1) === 1) || // 左上
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(get(x , y - 1) === 1) || // 上
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(get(x + 1, y - 1) === 1) || // 右上
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(get(x + 1, y ) === 1) || // 右
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(get(x + 1, y + 1) === 1) || // 右下
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(get(x , y + 1) === 1) || // 下
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(get(x - 1, y + 1) === 1) || // 左下
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(get(x - 1, y ) === 1) // 左
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)
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if (isSumiNear) this.cellWeights[i] = -0.5;
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});
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//#endregion
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}
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//#endregion
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this.botColor = this.game.user1Id == this.account.id && this.game.black == 1 || this.game.user2Id == this.account.id && this.game.black == 2;
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if (this.botColor) {
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this.think();
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}
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}
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/**
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* 対局が終わったとき
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*/
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private onEnded = async (msg: any) => {
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// ストリームから切断
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process.send!({
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type: 'ended'
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});
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let text: string;
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if (msg.game.surrendered) {
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if (this.isSettai) {
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text = serifs.reversi.settaiButYouSurrendered(this.userName);
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} else {
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text = serifs.reversi.youSurrendered(this.userName);
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}
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} else if (msg.winnerId) {
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if (msg.winnerId == this.account.id) {
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if (this.isSettai) {
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text = serifs.reversi.iWonButSettai(this.userName);
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} else {
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text = serifs.reversi.iWon(this.userName);
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}
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} else {
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if (this.isSettai) {
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text = serifs.reversi.iLoseButSettai(this.userName);
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} else {
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text = serifs.reversi.iLose(this.userName);
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}
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}
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} else {
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if (this.isSettai) {
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text = serifs.reversi.drawnSettai(this.userName);
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} else {
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text = serifs.reversi.drawn(this.userName);
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}
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}
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await this.post(text, this.startedNote);
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process.exit();
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}
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/**
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* 打たれたとき
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*/
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private onSet = (msg: any) => {
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this.o.put(msg.color, msg.pos);
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if (msg.next === this.botColor) {
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this.think();
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}
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}
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/**
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* Botにとってある局面がどれだけ有利か取得する
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*/
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private staticEval = () => {
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let score = this.o.canPutSomewhere(this.botColor).length;
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this.cellWeights.forEach((weight, i) => {
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// 係数
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const coefficient = 30;
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weight = weight * coefficient;
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const stone = this.o.board[i];
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if (stone === this.botColor) {
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// TODO: 価値のあるマスに設置されている自分の石に縦か横に接するマスは価値があると判断する
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score += weight;
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} else if (stone !== null) {
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score -= weight;
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}
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});
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// ロセオならスコアを反転
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if (this.game.isLlotheo) score = -score;
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// 接待ならスコアを反転
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if (this.isSettai) score = -score;
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return score;
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}
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private think = () => {
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console.log('Thinking...');
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console.time('think');
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// 接待モードのときは、全力(5手先読みくらい)で負けるようにする
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const maxDepth = this.isSettai ? 5 : this.strength;
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/**
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* αβ法での探索
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*/
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const dive = (pos: number, alpha = -Infinity, beta = Infinity, depth = 0): number => {
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// 試し打ち
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this.o.put(this.o.turn, pos);
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const key = this.o.board.toString();
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let cache = db[key];
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if (cache) {
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if (alpha >= cache.upper) {
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this.o.undo();
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return cache.upper;
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}
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if (beta <= cache.lower) {
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this.o.undo();
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return cache.lower;
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}
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alpha = Math.max(alpha, cache.lower);
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beta = Math.min(beta, cache.upper);
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} else {
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cache = {
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upper: Infinity,
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lower: -Infinity
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};
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}
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const isBotTurn = this.o.turn === this.botColor;
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// 勝った
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if (this.o.turn === null) {
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const winner = this.o.winner;
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// 勝つことによる基本スコア
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const base = 10000;
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let score;
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if (this.game.isLlotheo) {
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// 勝ちは勝ちでも、より自分の石を少なくした方が美しい勝ちだと判定する
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score = this.o.winner ? base - (this.o.blackCount * 100) : base - (this.o.whiteCount * 100);
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} else {
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// 勝ちは勝ちでも、より相手の石を少なくした方が美しい勝ちだと判定する
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score = this.o.winner ? base + (this.o.blackCount * 100) : base + (this.o.whiteCount * 100);
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}
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// 巻き戻し
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this.o.undo();
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// 接待なら自分が負けた方が高スコア
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return this.isSettai
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? winner !== this.botColor ? score : -score
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: winner === this.botColor ? score : -score;
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}
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if (depth === maxDepth) {
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// 静的に評価
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const score = this.staticEval();
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// 巻き戻し
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this.o.undo();
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return score;
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} else {
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const cans = this.o.canPutSomewhere(this.o.turn);
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let value = isBotTurn ? -Infinity : Infinity;
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let a = alpha;
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let b = beta;
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// 次のターンのプレイヤーにとって最も良い手を取得
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for (const p of cans) {
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if (isBotTurn) {
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const score = dive(p, a, beta, depth + 1);
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value = Math.max(value, score);
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a = Math.max(a, value);
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if (value >= beta) break;
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} else {
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const score = dive(p, alpha, b, depth + 1);
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value = Math.min(value, score);
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b = Math.min(b, value);
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if (value <= alpha) break;
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}
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}
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// 巻き戻し
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this.o.undo();
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if (value <= alpha) {
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cache.upper = value;
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} else if (value >= beta) {
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cache.lower = value;
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} else {
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cache.upper = value;
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cache.lower = value;
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}
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db[key] = cache;
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return value;
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}
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};
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const cans = this.o.canPutSomewhere(this.botColor);
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const scores = cans.map(p => dive(p));
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const pos = cans[scores.indexOf(Math.max(...scores))];
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console.log('Thinked:', pos);
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console.timeEnd('think');
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setTimeout(() => {
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process.send!({
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type: 'put',
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pos
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});
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}, 500);
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}
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/**
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* 対局が始まったことをMisskeyに投稿します
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*/
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private postGameStarted = async () => {
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const text = this.isSettai
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? serifs.reversi.startedSettai(this.userName)
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: serifs.reversi.started(this.userName, this.strength.toString());
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return await this.post(`${text}\n→[観戦する](${this.url})`);
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}
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/**
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* Misskeyに投稿します
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* @param text 投稿内容
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*/
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private post = async (text: string, renote?: any) => {
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if (this.allowPost) {
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const body = {
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i: config.i,
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text: text,
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visibility: 'home'
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} as any;
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if (renote) {
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body.renoteId = renote.id;
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}
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try {
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const res = await request.post(`${config.host}/api/notes/create`, {
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json: body
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});
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return res.createdNote;
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} catch (e) {
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console.error(e);
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return null;
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}
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} else {
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return null;
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}
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}
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}
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new Session();
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