import Phaser from 'phaser';
import { effect, type ReadonlySignal } from '@preact/signals-core';
import type { GameHost } from 'boardgame-core';
import { DisposableBag, type IDisposable } from '../utils';

type CleanupFn = void | (() => void);

export interface GameHostSceneOptions<TState extends Record<string, unknown>> {
    gameHost: GameHost<TState>;
}

export abstract class GameHostScene<TState extends Record<string, unknown>>
    extends Phaser.Scene
    implements IDisposable
{
    protected disposables = new DisposableBag();
    protected gameHost!: GameHost<TState>;
    
    addInterruption(promise: Promise<void>){
        this.gameHost?.addInterruption(promise);
    }

    init(data: GameHostSceneOptions<TState>): void {
        this.gameHost = data.gameHost;
    }

    create(): void {
        this.events.on('shutdown', this.dispose, this);
    }

    dispose(): void {
        this.disposables.dispose();
    }

    /** 获取当前状态的只读快照 */
    public get state(): TState {
        return this.gameHost.state.value;
    }

    /** 注册响应式监听（场景关闭时自动清理） */
    protected watch(fn: () => CleanupFn): void {
        this.disposables.add(effect(fn));
    }
}