import 'package:flutter/foundation.dart';

import 'market_history_admin_api.dart';

enum AdminAccessStatus {
  unknown,
  loading,
  authorized,
  forbidden,
  unauthorized,
  error,
}

/// Probes admin API access for home-screen discovery (allowlist-backed).
class AdminAccessService {
  AdminAccessService._();

  static final AdminAccessService instance = AdminAccessService._();

  final ValueNotifier<AdminAccessStatus> status =
      ValueNotifier<AdminAccessStatus>(AdminAccessStatus.unknown);

  Future<void> refresh({MarketHistoryAdminApi? api}) async {
    status.value = AdminAccessStatus.loading;
    try {
      await (api ?? MarketHistoryAdminApi()).fetchSyncRuns(limit: 1);
      status.value = AdminAccessStatus.authorized;
    } on MarketHistoryAdminApiException catch (e) {
      status.value = switch (e.statusCode) {
        401 => AdminAccessStatus.unauthorized,
        403 => AdminAccessStatus.forbidden,
        _ => AdminAccessStatus.error,
      };
    } catch (_) {
      status.value = AdminAccessStatus.error;
    }
  }

  void reset() {
    status.value = AdminAccessStatus.unknown;
  }
}