import { _decorator, Component, Node } from 'cc';

const { ccclass, property } = _decorator;

/**
 * SceneStart: 端到端联调脚本(真机验证响应式链路)。
 *
 * 工作流:
 * 1. onLoad/start 时构造一个 mock playerState(自包含 signal)
 * 2. 找到场景里的 PlayerInfoView 节点(通过 property)
 * 3. 调用 view.bindTo(mockSession),bind 会立即触发一次 applyPlayer(首次同步)
 * 4. 3 秒后改变 playerState.value,验证 view 自动更新 Label.string
 *
 * 这模拟完整的「login 事件 → PlatformSession 填 Store → view 自动刷新」链路,
 * 不依赖真 WS,但能让 cocos 编辑器运行时验证响应式模式正确。
 */
@ccclass('SceneStart')
export class SceneStart extends Component {
  @property(Node)
  playerInfoView: Node = null!;

  start(): void {
    if (!this.playerInfoView) {
      console.error('[SceneStart] playerInfoView 未设置');
      return;
    }

    // mock session:playerState 是自包含 signal(模拟 ReadonlyReactive)
    const playerState: any = {
      value: { nickname: '初始玩家', bean: 0, avatar: '' },
      subscribe(cb: (v: any, p: any) => void) {
        const subs: Array<(v: any, p: any) => void> = ((playerState as any).__subs ??= []);
        subs.push(cb);
        return () => {
          const i = subs.indexOf(cb);
          if (i >= 0) subs.splice(i, 1);
        };
      },
    };
    // 触发 setter 时调用所有订阅
    Object.defineProperty(playerState, 'value', {
      get() { return (playerState as any).__value; },
      set(v: any) {
        const prev = (playerState as any).__value;
        (playerState as any).__value = v;
        for (const fn of ((playerState as any).__subs ?? [])) {
          try { fn(v, prev); } catch (e) { console.error(e); }
        }
      },
    });
    (playerState as any).__value = { nickname: '初始玩家', bean: 0, avatar: '' };

    const mockSession: any = { player: { state: playerState } };

    const view: any = this.playerInfoView.getComponent('PlayerInfoView');
    if (!view || typeof view.bindTo !== 'function') {
      console.error('[SceneStart] PlayerInfoView 组件未挂或无 bindTo');
      return;
    }

    view.bindTo(mockSession);
    console.log('[SceneStart] bindTo 已触发,nickname 应为「初始玩家」');

    this.scheduleOnce(() => {
      playerState.value = { nickname: '更新后玩家', bean: 100, avatar: '' };
      console.log('[SceneStart] 改变 playerState,nickname 应自动变为「更新后玩家」');
    }, 3);
  }
}