/*
 *   Famedly Matrix SDK
 *   Copyright (C) 2020 Famedly GmbH
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as
 *   published by the Free Software Foundation, either version 3 of the
 *   License, or (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

import 'package:matrix/matrix.dart';

import 'package:test/test.dart';
import 'package:olm/olm.dart' as olm;

import '../fake_client.dart';
import '../fake_database.dart';
import '../fake_matrix_api.dart';

void main() {
  // key @othertest:fakeServer.notExisting
  const otherPickledOlmAccount =
      'VWhVApbkcilKAEGppsPDf9nNVjaK8/IxT3asSR0sYg0S5KgbfE8vXEPwoiKBX2cEvwX3OessOBOkk+ZE7TTbjlrh/KEd31p8Wo+47qj0AP+Ky+pabnhi+/rTBvZy+gfzTqUfCxZrkzfXI9Op4JnP6gYmy7dVX2lMYIIs9WCO1jcmIXiXum5jnfXu1WLfc7PZtO2hH+k9CDKosOFaXRBmsu8k/BGXPSoWqUpvu6WpEG9t5STk4FeAzA';

  group('Encrypt/Decrypt to-device messages', () {
    Logs().level = Level.error;
    var olmEnabled = true;

    late Client client;
    final otherClient = Client('othertestclient',
        httpClient: FakeMatrixApi(), databaseBuilder: getDatabase);
    late DeviceKeys device;
    late Map<String, dynamic> payload;

    test('setupClient', () async {
      try {
        await olm.init();
        olm.get_library_version();
      } catch (e) {
        olmEnabled = false;
        Logs().w('[LibOlm] Failed to load LibOlm', e);
      }
      Logs().i('[LibOlm] Enabled: $olmEnabled');
      if (!olmEnabled) return;

      client = await getClient();
      await client.abortSync();
      await otherClient.checkHomeserver('https://fakeserver.notexisting',
          checkWellKnown: false);
      await otherClient.init(
        newToken: 'abc',
        newUserID: '@othertest:fakeServer.notExisting',
        newHomeserver: otherClient.homeserver,
        newDeviceName: 'Text Matrix Client',
        newDeviceID: 'FOXDEVICE',
        newOlmAccount: otherPickledOlmAccount,
      );
      await otherClient.abortSync();

      await Future.delayed(Duration(milliseconds: 10));
      device = DeviceKeys.fromJson({
        'user_id': client.userID,
        'device_id': client.deviceID,
        'algorithms': [
          AlgorithmTypes.olmV1Curve25519AesSha2,
          AlgorithmTypes.megolmV1AesSha2
        ],
        'keys': {
          'curve25519:${client.deviceID}': client.identityKey,
          'ed25519:${client.deviceID}': client.fingerprintKey,
        },
      }, client);
    });

    test('encryptToDeviceMessage', () async {
      if (!olmEnabled) return;
      payload = await otherClient.encryption!
          .encryptToDeviceMessage([device], 'm.to_device', {'hello': 'foxies'});
    });

    test('decryptToDeviceEvent', () async {
      if (!olmEnabled) return;
      final encryptedEvent = ToDeviceEvent(
        sender: '@othertest:fakeServer.notExisting',
        type: EventTypes.Encrypted,
        content: payload[client.userID][client.deviceID],
      );
      final decryptedEvent =
          await client.encryption!.decryptToDeviceEvent(encryptedEvent);
      expect(decryptedEvent.type, 'm.to_device');
      expect(decryptedEvent.content['hello'], 'foxies');
    });

    test('decryptToDeviceEvent nocache', () async {
      if (!olmEnabled) return;
      client.encryption!.olmManager.olmSessions.clear();
      payload = await otherClient.encryption!.encryptToDeviceMessage(
          [device], 'm.to_device', {'hello': 'superfoxies'});
      final encryptedEvent = ToDeviceEvent(
        sender: '@othertest:fakeServer.notExisting',
        type: EventTypes.Encrypted,
        content: payload[client.userID][client.deviceID],
      );
      final decryptedEvent =
          await client.encryption!.decryptToDeviceEvent(encryptedEvent);
      expect(decryptedEvent.type, 'm.to_device');
      expect(decryptedEvent.content['hello'], 'superfoxies');
    });

    test('dispose client', () async {
      if (!olmEnabled) return;
      await client.dispose(closeDatabase: true);
      await otherClient.dispose(closeDatabase: true);
    });
  });
}