import 'dart:async';

import 'package:get/get.dart';

import 'package:pj_supermarket_cloud/common/index.dart';

/// Load 页控制器：只读取 AppControl 发布的真实启动步骤状态，
/// 业务初始化由应用入口微任务统一驱动，页面不重复打开数据库或设备。
class LoadController extends GetxController {
  static const String _tag = "load Controller";

  AppControl get appControl => Get.find<AppControl>();

  /// 虹软整库注册的最新进度文案；装载人脸库期间展示在步骤列表下方。
  final faceRegistrationMessage = ''.obs;

  StreamSubscription<FaceRegistrationProgress>? _registrationSubscription;

  @override
  void onInit() {
    super.onInit();
    // 注册进度事件通道订阅即回放最近一次进度，
    // 启动装载人脸库时给收银员实时反馈，避免最长的步骤只有静态“进行中”。
    _registrationSubscription = FaceDiscernPlugs.registrationStream.listen(
      (progress) {
        faceRegistrationMessage.value =
            progress.inProgress && progress.message.trim().isNotEmpty
                ? progress.message.trim()
                : '';
      },
      onError: (Object error, StackTrace stack) {
        logger.w('|$_tag|注册进度监听失败error:$error|stack:$stack|');
      },
    );
  }

  @override
  void onClose() {
    _registrationSubscription?.cancel();
    super.onClose();
  }

  List<AppStartupStepState> get startupSteps => appControl.startupSteps;

  int get completedCount => appControl.startupCompletedCount;

  double get progress => appControl.startupProgress;

  /// 失败后重新执行启动链路；进行中的初始化会被 AppControl 自身防重入拦截。
  Future<void> retry() => appControl.initAsync(force: true);
}