import type { Transport } from '../../YouleNexus/assets/framework/net/transport.ts';

/** 内存 Transport：模拟服务器。用 microtask 队列异步触发回调，贴近真实 WS 时序。 */
export class FakeTransport implements Transport {
  sent: string[] = [];
  url = '';
  private openCb?: () => void;
  private msgCb?: (f: string) => void;
  private closeCb?: () => void;
  private pending: Array<() => void> = [];
  private closed = false;

  connect(url: string): void { this.url = url; this.pending.push(() => this.openCb?.()); }
  send(frame: string): void { if (!this.closed) this.sent.push(frame); }
  close(): void { if (this.closed) return; this.closed = true; this.pending.push(() => this.closeCb?.()); }
  onOpen(cb: () => void): void { this.openCb = cb; }
  onMessage(cb: (f: string) => void): void { this.msgCb = cb; }
  onClose(cb: () => void): void { this.closeCb = cb; }

  /** 测试侧：模拟服务器推一帧给客户端。 */
  serverPush(frame: string): void { if (!this.closed) this.pending.push(() => this.msgCb?.(frame)); }

  /** 冲刷所有挂起回调（解析微任务）。 */
  async flush(): Promise<void> {
    while (this.pending.length) { const fn = this.pending.shift()!; fn(); await Promise.resolve(); }
  }
}