import 'package:flutter_test/flutter_test.dart';
import 'package:marianum_mobile/push/direct_push_registration.dart';
import 'package:marianum_mobile/push/push_secure_storage.dart';

class _MemoryStorage implements FlutterSecureStorageLike {
  final Map<String, String> values = {};

  @override
  Future<String?> read({required String key}) async => values[key];

  @override
  Future<void> write({required String key, required String? value}) async {
    if (value == null) {
      values.remove(key);
    } else {
      values[key] = value;
    }
  }

  @override
  Future<void> delete({required String key}) async => values.remove(key);
}

void main() {
  test('device identifier is generated once and then reused', () async {
    final storage = _MemoryStorage();
    final registration = DirectPushRegistration(storage: storage);
    final first = await registration.deviceIdentifier();
    expect(first, matches(RegExp(r'^[0-9a-f]{32}$')));
    expect(await registration.deviceIdentifier(), first);
    expect(
      await DirectPushRegistration(storage: storage).deviceIdentifier(),
      first,
    );
  });

  test('separate installs get different identifiers', () async {
    final a = await DirectPushRegistration(
      storage: _MemoryStorage(),
    ).deviceIdentifier();
    final b = await DirectPushRegistration(
      storage: _MemoryStorage(),
    ).deviceIdentifier();
    expect(a, isNot(b));
  });
}