import 'dart:async';

import 'package:flutter_test/flutter_test.dart';

import 'package:pj_supermarket_cloud/common/index.dart';
import 'package:pj_supermarket_cloud/pages/terminal/menu_query/controller.dart';
import 'package:pj_supermarket_cloud/pages/terminal/menu_query/reservation_menu_repository.dart';
import 'package:pj_supermarket_cloud/pages/terminal/menu_query/reservation_recognition_gateway.dart';
import 'package:pj_supermarket_cloud/pages/terminal/menu_query/reservation_sub_screen_gateway.dart';

void main() {
  testWidgets('重复识别只查询一次，旧响应不能覆盖新身份', (tester) async {
    final repository = _CompleterRepository();
    final recognition = _FakeRecognitionGateway();
    final subScreen = _FakeSubScreenGateway();
    final controller = ReservationMenuQueryController(
      repository: repository,
      recognitionGateway: recognition,
      subScreenGateway: subScreen,
      networkAvailable: () => true,
    );
    addTearDown(controller.onClose);

    controller.onInit();
    await tester.pump();
    expect(recognition.cardCallbacks, hasLength(1));

    final first = recognition.emitCardAt(0, 'old-card');
    final duplicate = recognition.emitCardAt(0, 'old-card');
    await tester.pump();
    expect(repository.calls, hasLength(1));
    await duplicate;

    await controller.startRecognition();
    expect(recognition.cardCallbacks, hasLength(2));
    final second = recognition.emitCardAt(1, 'new-card');
    await tester.pump();
    expect(repository.calls, hasLength(2));

    repository.completers[1].complete(_result('李*华', 1));
    await second;
    expect(controller.result.value?.maskedName, '李*华');

    repository.completers[0].complete(_result('张*明', 1));
    await first;
    expect(controller.result.value?.maskedName, '李*华');
    expect(controller.status.value, ReservationMenuQueryStatus.success);
    await controller.clearForPrivacy();
  });

  testWidgets('11 天本地分页、翻页续时并在到期后主副屏清空', (tester) async {
    var now = DateTime(2026, 7, 24, 8);
    final repository = _ImmediateRepository(_result('张*明', 11));
    final recognition = _FakeRecognitionGateway();
    final subScreen = _FakeSubScreenGateway();
    final controller = ReservationMenuQueryController(
      repository: repository,
      recognitionGateway: recognition,
      subScreenGateway: subScreen,
      networkAvailable: () => true,
      privacyDuration: const Duration(seconds: 3),
      now: () => now,
    );
    addTearDown(controller.onClose);

    controller.onInit();
    await tester.pump();
    await recognition.emitCardAt(0, 'card-1');
    expect(controller.totalPages, 2);
    expect(controller.currentDays, hasLength(10));
    expect(controller.remainingSeconds.value, 3);

    now = now.add(const Duration(seconds: 2));
    await tester.pump(const Duration(seconds: 1));
    expect(controller.remainingSeconds.value, 1);

    await controller.changePage(2);
    expect(controller.currentDays, hasLength(1));
    expect(controller.remainingSeconds.value, 3);
    expect(subScreen.updates.last.currentPage, 2);
    expect(subScreen.updates.last.days, hasLength(1));

    now = now.add(const Duration(seconds: 3));
    await tester.pump(const Duration(seconds: 1));
    await tester.pump();
    expect(controller.status.value, ReservationMenuQueryStatus.expired);
    expect(controller.result.value, isNull);
    expect(subScreen.clearCalls, 1);
  });

  testWidgets('断网时不调用预约接口，单屏不可用不影响主屏查询', (tester) async {
    final offlineRepository = _ImmediateRepository(_result('张*明', 1));
    final offlineRecognition = _FakeRecognitionGateway();
    final offlineController = ReservationMenuQueryController(
      repository: offlineRepository,
      recognitionGateway: offlineRecognition,
      subScreenGateway: _FakeSubScreenGateway(available: false),
      networkAvailable: () => false,
    );
    addTearDown(offlineController.onClose);
    offlineController.onInit();
    await tester.pump();
    await offlineRecognition.emitCardAt(0, 'card-offline');
    expect(offlineRepository.calls, isEmpty);
    expect(offlineController.status.value,
        ReservationMenuQueryStatus.networkError);

    final onlineRepository = _ImmediateRepository(_result('李*华', 1));
    final onlineRecognition = _FakeRecognitionGateway();
    final onlineController = ReservationMenuQueryController(
      repository: onlineRepository,
      recognitionGateway: onlineRecognition,
      subScreenGateway: _FakeSubScreenGateway(available: false),
      networkAvailable: () => true,
    );
    addTearDown(onlineController.onClose);
    onlineController.onInit();
    await tester.pump();
    await onlineRecognition.emitCardAt(0, 'card-online');
    expect(onlineController.status.value, ReservationMenuQueryStatus.success);
    expect(onlineController.result.value?.maskedName, '李*华');
    await onlineController.clearForPrivacy();
  });

  testWidgets('人脸方式先显示识别页，识别成功后才发送预约查询状态', (tester) async {
    final repository = _ImmediateRepository(_result('张*明', 1));
    final recognition = _FakeRecognitionGateway();
    final subScreen = _FakeSubScreenGateway();
    final controller = ReservationMenuQueryController(
      repository: repository,
      recognitionGateway: recognition,
      subScreenGateway: subScreen,
      networkAvailable: () => true,
    );
    addTearDown(controller.onClose);

    controller.onInit();
    await tester.pump();
    subScreen.updates.clear();

    await controller.selectMethod(ReservationRecognitionMethod.face);
    expect(recognition.faceCallbacks, hasLength(1));
    expect(
      subScreen.updates,
      isEmpty,
      reason: '人脸识别开始后由统一人脸协议接管副屏，不能提前发送预约 loading',
    );

    await recognition.emitFaceAt(0, '1001');
    expect(repository.calls, ['1001']);
    expect(
      subScreen.updates.map((event) => event.scenario),
      ['loading', 'success'],
    );
    await controller.clearForPrivacy();
  });

  test('预约日期模型按 5、10、11 天正确分页', () {
    for (final entry in const {5: 1, 10: 1, 11: 2}.entries) {
      final display = ReservationMenuDisplayData.fromService(
        _result('张*明', entry.key),
      );
      expect(display.totalPages, entry.value);
      expect(display.pageDays(1), hasLength(entry.key.clamp(0, 10)));
      if (entry.key == 11) expect(display.pageDays(2), hasLength(1));
    }
  });
}

class _CompleterRepository implements ReservationMenuRepository {
  final calls = <String>[];
  final completers = <Completer<ServiceReservationMenuQuery?>>[];

  @override
  Future<ServiceReservationMenuQuery?> query({
    required ReservationRecognitionMethod method,
    required String identityValue,
  }) {
    calls.add(identityValue);
    final completer = Completer<ServiceReservationMenuQuery?>();
    completers.add(completer);
    return completer.future;
  }
}

class _ImmediateRepository implements ReservationMenuRepository {
  _ImmediateRepository(this.value);

  final ServiceReservationMenuQuery value;
  final calls = <String>[];

  @override
  Future<ServiceReservationMenuQuery?> query({
    required ReservationRecognitionMethod method,
    required String identityValue,
  }) async {
    calls.add(identityValue);
    return value;
  }
}

class _FakeRecognitionGateway implements ReservationRecognitionGateway {
  final cardCallbacks = <Future<void> Function(String)>[];
  final cardFailures = <void Function(ReservationRecognitionFailure failure)>[];
  final faceCallbacks = <Future<void> Function(String)>[];
  final faceFailures = <void Function(ReservationRecognitionFailure failure)>[];
  int stopAllCalls = 0;

  Future<void> emitCardAt(int index, String value) {
    return cardCallbacks[index](value);
  }

  Future<void> emitFaceAt(int index, String value) {
    return faceCallbacks[index](value);
  }

  @override
  Future<void> startCard({
    required Future<void> Function(String cardNumber) onRecognized,
    required void Function(ReservationRecognitionFailure failure) onFailure,
  }) async {
    cardCallbacks.add(onRecognized);
    cardFailures.add(onFailure);
  }

  @override
  Future<void> startFace({
    required Future<void> Function(String userId) onRecognized,
    required void Function(ReservationRecognitionFailure failure) onFailure,
  }) async {
    faceCallbacks.add(onRecognized);
    faceFailures.add(onFailure);
  }

  @override
  Future<void> stopAll() async {
    stopAllCalls++;
  }

  @override
  Future<void> stopCard() async {}

  @override
  Future<void> stopFace() async {}
}

class _FakeSubScreenGateway implements ReservationSubScreenGateway {
  _FakeSubScreenGateway({this.available = true});

  final bool available;
  final updates = <SubScreenReservationQueryEvent>[];
  int showCalls = 0;
  int clearCalls = 0;

  @override
  bool get isAvailable => available;

  @override
  Future<void> show() async {
    showCalls++;
  }

  @override
  Future<void> update(SubScreenReservationQueryEvent event) async {
    updates.add(event);
  }

  @override
  Future<void> clear({
    required String sessionId,
    required int revision,
  }) async {
    clearCalls++;
  }
}

ServiceReservationMenuQuery _result(String maskedName, int dayCount) {
  final start = DateTime(2026, 7, 24);
  final days = List<ServiceReservationDay>.generate(dayCount, (index) {
    final date = start.add(Duration(days: index));
    return ServiceReservationDay(
      date:
          '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}',
      meals: const [
        ServiceReservationMeal(
          hourType: 'LUNCH',
          mealTitle: '午餐',
          items: ['香菇滑鸡', '清炒时蔬'],
        ),
      ],
    );
  });
  return ServiceReservationMenuQuery(
    maskedName: maskedName,
    deptName: '三年级二班',
    merchantName: '第一食堂',
    totalDayCount: dayCount,
    totalMealCount: dayCount,
    days: days,
  );
}