import 'dart:convert';

import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:social_app/core/notifications/local_notification_service.dart';
import 'package:social_app/core/notifications/reminder_notification_callbacks.dart';
import 'package:social_app/features/calendar/reminders/models/reminder_action.dart';
import 'package:social_app/features/calendar/reminders/models/reminder_payload.dart';

class MockFlutterLocalNotificationsPlugin extends Mock
    implements FlutterLocalNotificationsPlugin {}

void main() {
  setUpAll(() {
    registerFallbackValue(
      const InitializationSettings(
        android: AndroidInitializationSettings('@mipmap/ic_launcher'),
        iOS: DarwinInitializationSettings(),
      ),
    );
  });

  late MockFlutterLocalNotificationsPlugin plugin;
  late LocalNotificationService service;
  late List<ReminderAction> handledActions;
  late List<ReminderPayload> presentedPayloads;
  DidReceiveNotificationResponseCallback? callback;

  setUp(() async {
    SharedPreferences.setMockInitialValues({});
    plugin = MockFlutterLocalNotificationsPlugin();
    service = LocalNotificationService(plugin: plugin);
    handledActions = <ReminderAction>[];
    presentedPayloads = <ReminderPayload>[];

    when(
      () => plugin.initialize(
        any(),
        onDidReceiveNotificationResponse: any(
          named: 'onDidReceiveNotificationResponse',
        ),
        onDidReceiveBackgroundNotificationResponse: any(
          named: 'onDidReceiveBackgroundNotificationResponse',
        ),
      ),
    ).thenAnswer((invocation) async {
      callback =
          invocation.namedArguments[#onDidReceiveNotificationResponse]
              as DidReceiveNotificationResponseCallback?;
      return true;
    });

    when(
      () => plugin
          .resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin
          >(),
    ).thenReturn(null);
    when(
      () => plugin
          .resolvePlatformSpecificImplementation<
            IOSFlutterLocalNotificationsPlugin
          >(),
    ).thenReturn(null);

    service.bindActionHandler(({required action, required payload}) async {
      handledActions.add(action);
    });
    service.bindInAppReminderHandler((payload) async {
      presentedPayloads.add(payload);
    });
    await ReminderNotificationCallbacks.bindResponseHandler(
      service.handleNotificationResponse,
    );

    await service.initialize();
  });

  test('cancel action from system notification maps to archive', () async {
    callback!(
      NotificationResponse(
        notificationResponseType:
            NotificationResponseType.selectedNotificationAction,
        id: 101,
        actionId: 'cancel',
        payload: jsonEncode(
          ReminderPayload(
            eventId: 'evt_1',
            title: 'sync',
            startAt: DateTime.parse('2026-03-19T10:00:00+08:00'),
            timezone: 'Asia/Shanghai',
          ).toJson(),
        ),
      ),
    );
    await Future<void>.delayed(Duration.zero);

    expect(handledActions, [ReminderAction.archive]);
  });

  test('duplicate notification response is handled only once', () async {
    final response = NotificationResponse(
      notificationResponseType:
          NotificationResponseType.selectedNotificationAction,
      id: 201,
      actionId: 'cancel',
      payload: jsonEncode(
        ReminderPayload(
          eventId: 'evt_2',
          title: 'retro',
          startAt: DateTime.parse('2026-03-19T11:00:00+08:00'),
          timezone: 'Asia/Shanghai',
        ).toJson(),
      ),
    );

    callback!(response);
    callback!(response);
    await Future<void>.delayed(Duration.zero);

    expect(handledActions, [ReminderAction.archive]);
  });

  test('notification body tap forwards payload to in-app presenter', () async {
    callback!(
      NotificationResponse(
        notificationResponseType: NotificationResponseType.selectedNotification,
        id: 301,
        payload: jsonEncode(
          ReminderPayload(
            eventId: 'evt_3',
            title: 'daily sync',
            startAt: DateTime.parse('2026-03-19T12:00:00+08:00'),
            timezone: 'Asia/Shanghai',
          ).toJson(),
        ),
      ),
    );
    await Future<void>.delayed(Duration.zero);

    expect(presentedPayloads.map((item) => item.eventId), ['evt_3']);
    expect(handledActions, isEmpty);
  });
}