import 'dart:convert';
import 'dart:typed_data';

import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:selfprivacy/logic/models/hive/backblaze_bucket.dart';
import 'package:selfprivacy/logic/models/hive/backups_credential.dart';
import 'package:selfprivacy/logic/models/hive/dns_provider_credential.dart';
import 'package:selfprivacy/logic/models/hive/server.dart';
import 'package:selfprivacy/logic/models/hive/server_details.dart';
import 'package:selfprivacy/logic/models/hive/server_domain.dart';
import 'package:selfprivacy/logic/models/hive/server_provider_credential.dart';
import 'package:selfprivacy/logic/models/hive/user.dart';
import 'package:selfprivacy/logic/models/hive/wizards_data/server_installation_wizard_data.dart';
import 'package:selfprivacy/utils/platform_adapter.dart';

class HiveConfig {
  static Future<void> init() async {
    final String? storagePath = PlatformAdapter.storagePath;
    print('HiveConfig: Custom storage path: $storagePath');
    await Hive.initFlutter(storagePath);
    Hive.registerAdapter(UserAdapter());
    Hive.registerAdapter(ServerHostingDetailsAdapter());
    Hive.registerAdapter(ServerDomainAdapter());
    Hive.registerAdapter(BackupsCredentialAdapter());
    Hive.registerAdapter(ServerProviderVolumeAdapter());
    Hive.registerAdapter(BackblazeBucketAdapter());
    Hive.registerAdapter(ServerProviderCredentialAdapter());
    Hive.registerAdapter(DnsProviderCredentialAdapter());
    Hive.registerAdapter(ServerAdapter());
    Hive.registerAdapter(DnsProviderTypeAdapter());
    Hive.registerAdapter(ServerProviderTypeAdapter());
    Hive.registerAdapter(UserTypeAdapter());
    Hive.registerAdapter(BackupsProviderTypeAdapter());
    Hive.registerAdapter(ServerInstallationWizardDataAdapter());

    await Hive.openBox(BNames.appSettingsBox);

    final HiveAesCipher cipher = HiveAesCipher(
      await getEncryptedKey(BNames.serverInstallationEncryptionKey),
    );

    await Hive.openBox(BNames.serverInstallationBox, encryptionCipher: cipher);
    await Hive.openBox(BNames.resourcesBox, encryptionCipher: cipher);
    await Hive.openBox(BNames.wizardDataBox, encryptionCipher: cipher);

    final Box resourcesBox = Hive.box(BNames.resourcesBox);
    if (resourcesBox.isEmpty) {
      final Box serverInstallationBox = Hive.box(BNames.serverInstallationBox);

      final String? serverProviderKey =
          serverInstallationBox.get(BNames.hetznerKey);
      final String? serverLocation =
          serverInstallationBox.get(BNames.serverLocation);
      final String? dnsProviderKey =
          serverInstallationBox.get(BNames.cloudFlareKey);
      final BackupsCredential? backblazeCredential =
          serverInstallationBox.get(BNames.backblazeCredential);
      final ServerDomain? serverDomain =
          serverInstallationBox.get(BNames.serverDomain);
      final ServerHostingDetails? serverDetails =
          serverInstallationBox.get(BNames.serverDetails);
      final BackblazeBucket? backblazeBucket =
          serverInstallationBox.get(BNames.backblazeBucket);
      final String? serverType =
          serverInstallationBox.get(BNames.serverTypeIdentifier);
      final ServerProviderType? serverProvider =
          serverInstallationBox.get(BNames.serverProvider);
      final DnsProviderType? dnsProvider =
          serverInstallationBox.get(BNames.dnsProvider);

      if (serverProviderKey != null &&
          (serverProvider != null ||
              (serverDetails != null &&
                  serverDetails.provider != ServerProviderType.unknown))) {
        final ServerProviderCredential serverProviderCredential =
            ServerProviderCredential(
          tokenId: null,
          token: serverProviderKey,
          provider: serverProvider ?? serverDetails!.provider,
          associatedServerIds: serverDetails != null ? [serverDetails.id] : [],
        );

        await resourcesBox
            .put(BNames.serverProviderTokens, [serverProviderCredential]);
      }

      if (dnsProviderKey != null &&
          (dnsProvider != null ||
              (serverDomain != null &&
                  serverDomain.provider != DnsProviderType.unknown))) {
        final DnsProviderCredential dnsProviderCredential =
            DnsProviderCredential(
          tokenId: null,
          token: dnsProviderKey,
          provider: dnsProvider ?? serverDomain!.provider,
          associatedDomainNames:
              serverDomain != null ? [serverDomain.domainName] : [],
        );

        await resourcesBox
            .put(BNames.dnsProviderTokens, [dnsProviderCredential]);
      }

      if (backblazeCredential != null) {
        await resourcesBox
            .put(BNames.backupsProviderTokens, [backblazeCredential]);
      }

      if (backblazeBucket != null) {
        await resourcesBox.put(BNames.backblazeBucket, backblazeBucket);
      }

      if (serverDetails != null && serverDomain != null) {
        await resourcesBox.put(BNames.servers, [
          Server(
            domain: serverDomain,
            hostingDetails: serverDetails.copyWith(
              serverLocation: serverLocation,
              serverType: serverType,
            ),
          ),
        ]);
      }
    }
  }

  static Future<Uint8List> getEncryptedKey(final String encKey) async {
    const FlutterSecureStorage secureStorage = FlutterSecureStorage();
    final bool hasEncryptionKey = await secureStorage.containsKey(key: encKey);
    if (!hasEncryptionKey) {
      final List<int> key = Hive.generateSecureKey();
      await secureStorage.write(key: encKey, value: base64UrlEncode(key));
    }

    final String? string = await secureStorage.read(key: encKey);
    return base64Url.decode(string!);
  }
}

/// Mappings for the different boxes and their keys
class BNames {
  /// App settings box. Contains app settings like [isDarkModeOn], [isOnboardingShowing]
  static String appSettingsBox = 'appSettings';

  /// A boolean field of [appSettingsBox] box.
  static String isDarkModeOn = 'isDarkModeOn';

  /// A boolean field of [appSettingsBox] box.
  static String isAutoDarkModeOn = 'isAutoDarkModeOn';

  /// A boolean field of [appSettingsBox] box.
  static String isOnboardingShowing = 'isOnboardingShowing';

  /// Encryption key to decrypt [serverInstallationBox] box.
  static String serverInstallationEncryptionKey = 'key';

  /// Server installation box. Contains server details and provider tokens.
  static String serverInstallationBox = 'appConfig';

  /// A List<String> field of [serverInstallationBox] box.
  static String rootKeys = 'rootKeys';

  /// A boolean field of [serverInstallationBox] box.
  static String hasFinalChecked = 'hasFinalChecked';

  /// A boolean field of [serverInstallationBox] box.
  static String isServerStarted = 'isServerStarted';

  /// A [ServerDomain] field of [serverInstallationBox] box.
  static String serverDomain = 'cloudFlareDomain';

  /// A String field of [serverInstallationBox] box.
  static String hetznerKey = 'hetznerKey';

  /// A String field of [serverInstallationBox] box.
  static String serverProvider = 'serverProvider';

  /// A String field of [serverInstallationBox] box.
  static String dnsProvider = 'dnsProvider';

  /// A String field of [serverLocation] box.
  static String serverLocation = 'serverLocation';

  /// A String field of [serverInstallationBox] box.
  static String cloudFlareKey = 'cloudFlareKey';

  /// A String field of [serverInstallationBox] box.
  static String serverTypeIdentifier = 'serverTypeIdentifier';

  /// A [User] field of [serverInstallationBox] box.
  static String rootUser = 'rootUser';

  /// A [ServerHostingDetails] field of [serverInstallationBox] box.
  static String serverDetails = 'hetznerServer';

  /// A [BackupsCredential] field of [serverInstallationBox] box.
  static String backblazeCredential = 'backblazeKey';

  /// A [BackblazeBucket] field of [serverInstallationBox] box.
  static String backblazeBucket = 'backblazeBucket';

  /// A boolean field of [serverInstallationBox] box.
  static String isLoading = 'isLoading';

  /// A boolean field of [serverInstallationBox] box.
  static String isServerResetedFirstTime = 'isServerResetedFirstTime';

  /// A boolean field of [serverInstallationBox] box.
  static String isServerResetedSecondTime = 'isServerResetedSecondTime';

  /// A boolean field of [serverInstallationBox] box.
  static String isRecoveringServer = 'isRecoveringServer';

  /// Resources and provider tokens box,
  static String resourcesBox = 'resourcesBox';

  /// Server Provider Tokens of [resourcesBox] box.
  static String serverProviderTokens = 'serverProviderTokens';

  /// DNS Provider Tokens of [resourcesBox] box.
  static String dnsProviderTokens = 'dnsProviderTokens';

  /// Backups Provider Tokens of [resourcesBox] box.
  static String backupsProviderTokens = 'backupsProviderTokens';

  /// Servers of [resourcesBox] box.
  static String servers = 'servers';

  /// Wizard data box
  static String wizardDataBox = 'wizardDataBox';

  /// Server installation wizard data of [wizardDataBox] box.
  static String serverInstallationWizardData = 'serverInstallationWizardData';
}