import { common } from '@kit.AbilityKit';
import { StartupOrchestrator, StartupResult, StartupStage } from 'domain_resource';
import { RouteName, BridgeGameParams } from '../routes/AppRoutes';
import { KEY_SPLASH_VISIBLE, KEY_SPLASH_PERCENT, KEY_SPLASH_LABEL, KEY_SPLASH_BLOCKED } from './Index';

/**
 * 启动引导页（对应 weclomeactivity1，框架 §4/§8.1）——**纯启动逻辑载体，无可见 UI**。
 * 进入即跑 StartupOrchestrator（本地配置→远程配置→资源准备→app_data 注入），进度/文案/阻断写入
 * AppStorage，由 Index 根层启动页覆盖层统一呈现；完成后 replace 进大厅容器（覆盖层在大厅首帧后撤）。
 *
 * 视觉放在 Index 根层而非本页：使 splash→大厅的页面切换发生在覆盖层之下，彻底消除导航空隙白闪。
 */
@Component
export struct SplashPage {
  pathStack: NavPathStack = new NavPathStack();

  aboutToAppear(): void {
    this.runStartup();
  }

  private async runStartup(): Promise<void> {
    const ctx: common.UIAbilityContext = this.getUIContext().getHostContext() as common.UIAbilityContext;
    const orchestrator = new StartupOrchestrator(ctx, (stage: StartupStage, percent: number) => {
      AppStorage.setOrCreate(KEY_SPLASH_PERCENT, percent);
      AppStorage.setOrCreate(KEY_SPLASH_LABEL, SplashPage.stageLabel(stage, percent));
    });
    try {
      const result: StartupResult = await orchestrator.run();
      if (result.enter) {
        // 切到大厅：保持 splashVisible=true，根层覆盖层持续盖住，由大厅首帧 onPageEnd 撤除。
        const params: BridgeGameParams = { entryUrl: result.entryUrl, launchType: '0' };
        this.pathStack.replacePathByName(RouteName.BRIDGE_GAME, params, false);
      } else {
        AppStorage.setOrCreate(KEY_SPLASH_BLOCKED, result.message);
      }
    } catch (e) {
      const err = e as Error;
      AppStorage.setOrCreate(KEY_SPLASH_BLOCKED, `启动失败：${err.message}`);
    }
  }

  /** 阶段 → 用户可读中文文案（PREPARE_RESOURCE 按进度区分"准备资源/下载更新"）。 */
  private static stageLabel(stage: StartupStage, percent: number): string {
    switch (stage) {
      case StartupStage.INIT:
        return '正在启动…';
      case StartupStage.LOAD_LOCAL_CONFIG:
        return '读取本地配置…';
      case StartupStage.REQUEST_PERMISSIONS:
        return '检测网络权限…';
      case StartupStage.FETCH_REMOTE_CONFIG:
        return '获取配置文件…';
      case StartupStage.RESOLVE_VERSION:
        return '检测升级版本…';
      case StartupStage.PREPARE_RESOURCE:
        // 35% 为内置资源准备；55%~85% 为远程 zip 下载
        return percent >= 55 ? '正在下载更新…' : '准备游戏资源…';
      case StartupStage.INJECT_APP_DATA:
        return '即将进入大厅…';
      case StartupStage.ENTER_HALL:
        return '进入大厅';
      default:
        return '正在启动…';
    }
  }

  build() {
    // 视觉由 Index 根层启动页覆盖层呈现；本页仅承载启动逻辑（透明、无内容）
    NavDestination() {
    }
    .hideTitleBar(true)
    .backgroundColor(Color.Transparent)
  }
}