import 'dart:io';

import 'package:dio/dio.dart';
import 'package:selfprivacy/config/get_it_config.dart';
import 'package:selfprivacy/logic/api_maps/rest_maps/server_providers/volume_provider.dart';
import 'package:selfprivacy/logic/api_maps/rest_maps/server_providers/server_provider.dart';
import 'package:selfprivacy/logic/api_maps/staging_options.dart';
import 'package:selfprivacy/logic/models/disk_size.dart';
import 'package:selfprivacy/logic/models/json/hetzner_server_info.dart';
import 'package:selfprivacy/logic/models/hive/server_details.dart';
import 'package:selfprivacy/logic/models/hive/user.dart';
import 'package:selfprivacy/logic/models/price.dart';
import 'package:selfprivacy/utils/password_generator.dart';

class HetznerApi extends ServerProviderApi with VolumeProviderApi {
  HetznerApi({
    this.region,
    this.hasLogger = true,
    this.isWithToken = true,
  });
  @override
  bool hasLogger;
  @override
  bool isWithToken;

  final String? region;

  @override
  BaseOptions get options {
    final BaseOptions options = BaseOptions(
      baseUrl: rootAddress,
      contentType: Headers.jsonContentType,
      responseType: ResponseType.json,
    );
    if (isWithToken) {
      final String? token = getIt<ApiConfigModel>().serverProviderKey;
      assert(token != null);
      options.headers = {'Authorization': 'Bearer $token'};
    }

    if (validateStatus != null) {
      options.validateStatus = validateStatus!;
    }

    return options;
  }

  @override
  String get rootAddress => 'https://api.hetzner.cloud/v1';

  @override
  String get infectProviderName => 'hetzner';

  @override
  String get displayProviderName => 'Hetzner';

  Future<GenericResult<bool>> isApiTokenValid(final String token) async {
    bool isValid = false;
    Response? response;
    String message = '';
    final Dio client = await getClient();
    try {
      response = await client.get(
        '/servers',
        options: Options(
          followRedirects: false,
          validateStatus: (final status) =>
              status != null && (status >= 200 || status == 401),
          headers: {'Authorization': 'Bearer $token'},
        ),
      );
    } catch (e) {
      print(e);
      isValid = false;
      message = e.toString();
    } finally {
      close(client);
    }

    if (response == null) {
      return GenericResult(
        data: isValid,
        success: false,
        message: message,
      );
    }

    if (response.statusCode == HttpStatus.ok) {
      isValid = true;
    } else if (response.statusCode == HttpStatus.unauthorized) {
      isValid = false;
    } else {
      throw Exception('code: ${response.statusCode}');
    }

    return GenericResult(
      data: isValid,
      success: true,
      message: response.statusMessage,
    );
  }

  ProviderApiTokenValidation getApiTokenValidation() =>
      ProviderApiTokenValidation(
        regexp: RegExp(r'\s+|[-!$%^&*()@+|~=`{}\[\]:<>?,.\/]'),
        length: 64,
      );

  Future<Price?> getPricePerGb() async {
    double? price;

    final Response pricingResponse;
    final Dio client = await getClient();
    try {
      pricingResponse = await client.get('/pricing');

      final volume = pricingResponse.data['pricing']['volume'];
      final volumePrice = volume['price_per_gb_month']['gross'];
      price = double.parse(volumePrice);
    } catch (e) {
      print(e);
    } finally {
      client.close();
    }

    return price == null
        ? null
        : Price(
            value: price,
            currency: 'EUR',
          );
  }

  Future<GenericResult> createVolume() async {
    Response? createVolumeResponse;
    final Dio client = await getClient();
    try {
      createVolumeResponse = await client.post(
        '/volumes',
        data: {
          'size': 10,
          'name': StringGenerators.storageName(),
          'labels': {'labelkey': 'value'},
          'location': region,
          'automount': false,
          'format': 'ext4'
        },
      );
    } catch (e) {
      print(e);
      return GenericResult(
        data: null,
        success: false,
        message: e.toString(),
      );
    } finally {
      client.close();
    }

    return GenericResult(
      data: createVolumeResponse.data,
      success: true,
      code: createVolumeResponse.statusCode,
      message: createVolumeResponse.statusMessage,
    );
  }

  Future<GenericResult<List>> getVolumes({final String? status}) async {
    List volumes = [];

    Response? getVolumesResonse;
    final Dio client = await getClient();
    try {
      getVolumesResonse = await client.get(
        '/volumes',
        queryParameters: {
          'status': status,
        },
      );
      volumes = getVolumesResonse.data['volumes'];
    } catch (e) {
      print(e);
      return GenericResult(
        data: [],
        success: false,
        message: e.toString(),
      );
    } finally {
      client.close();
    }

    return GenericResult(
      data: volumes,
      success: true,
      code: getVolumesResonse.statusCode,
      message: getVolumesResonse.statusMessage,
    );
  }

  Future<ServerVolume?> getVolume(
    final String volumeId,
  ) async {
    ServerVolume? volume;

    final Response getVolumeResponse;
    final Dio client = await getClient();
    try {
      getVolumeResponse = await client.get('/volumes/$volumeId');
      final int responseVolumeId = getVolumeResponse.data['volume']['id'];
      final int volumeSize = getVolumeResponse.data['volume']['size'];
      final int volumeServer = getVolumeResponse.data['volume']['server'];
      final String volumeName = getVolumeResponse.data['volume']['name'];
      final volumeDevice = getVolumeResponse.data['volume']['linux_device'];
      volume = ServerVolume(
        id: responseVolumeId,
        name: volumeName,
        sizeByte: volumeSize,
        serverId: volumeServer,
        linuxDevice: volumeDevice,
      );
    } catch (e) {
      print(e);
    } finally {
      client.close();
    }

    return volume;
  }

  Future<GenericResult<bool>> deleteVolume(final int volumeId) async {
    final Dio client = await getClient();
    try {
      await client.delete('/volumes/$volumeId');
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: false,
        message: e.toString(),
      );
    } finally {
      client.close();
    }

    return GenericResult(
      success: true,
      data: true,
    );
  }

  Future<GenericResult<bool>> attachVolume(
    final ServerVolume volume,
    final int serverId,
  ) async {
    bool success = false;

    Response? attachVolumeResponse;
    final Dio client = await getClient();
    try {
      attachVolumeResponse = await client.post(
        '/volumes/${volume.id}/actions/attach',
        data: {
          'automount': true,
          'server': serverId,
        },
      );
      success =
          attachVolumeResponse.data['action']['status'].toString() != 'error';
    } catch (e) {
      print(e);
    } finally {
      client.close();
    }

    return GenericResult(
      data: success,
      success: true,
      code: attachVolumeResponse?.statusCode,
      message: attachVolumeResponse?.statusMessage,
    );
  }

  Future<GenericResult<bool>> detachVolume(final int volumeId) async {
    bool success = false;

    final Response detachVolumeResponse;
    final Dio client = await getClient();
    try {
      detachVolumeResponse = await client.post(
        '/volumes/$volumeId/actions/detach',
      );
      success =
          detachVolumeResponse.data['action']['status'].toString() != 'error';
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: false,
        message: e.toString(),
      );
    } finally {
      client.close();
    }

    return GenericResult(
      success: false,
      data: success,
    );
  }

  Future<GenericResult<bool>> resizeVolume(
    final ServerVolume volume,
    final DiskSize size,
  ) async {
    bool success = false;

    final Response resizeVolumeResponse;
    final Dio client = await getClient();
    try {
      resizeVolumeResponse = await client.post(
        '/volumes/${volume.id}/actions/resize',
        data: {
          'size': size.gibibyte,
        },
      );
      success =
          resizeVolumeResponse.data['action']['status'].toString() != 'error';
    } catch (e) {
      print(e);
      return GenericResult(
        data: false,
        success: false,
        message: e.toString(),
      );
    } finally {
      client.close();
    }

    return GenericResult(
      data: success,
      success: true,
    );
  }

  Future<GenericResult> createServer({
    required final String dnsApiToken,
    required final String dnsProviderType,
    required final String serverApiToken,
    required final User rootUser,
    required final String base64Password,
    required final String databasePassword,
    required final String domainName,
    required final String hostName,
    required final int volumeId,
    required final String serverType,
  }) async {
    final String stagingAcme = StagingOptions.stagingAcme ? 'true' : 'false';
    Response? serverCreateResponse;
    DioError? hetznerError;
    bool success = false;

    final Dio client = await getClient();
    try {
      final Map<String, Object> data = {
        'name': hostName,
        'server_type': serverType,
        'start_after_create': false,
        'image': 'ubuntu-20.04',
        'volumes': [volumeId],
        'networks': [],
        'user_data': '#cloud-config\n'
            'runcmd:\n'
            '- curl https://git.selfprivacy.org/SelfPrivacy/selfprivacy-nixos-infect/raw/branch/providers/hetzner/nixos-infect | '
            "STAGING_ACME='$stagingAcme' PROVIDER=$infectProviderName DNS_PROVIDER_TYPE=$dnsProviderType "
            "NIX_CHANNEL=nixos-21.05 DOMAIN='$domainName' LUSER='${rootUser.login}' ENCODED_PASSWORD='$base64Password' "
            'CF_TOKEN=$dnsApiToken DB_PASSWORD=$databasePassword API_TOKEN=$serverApiToken HOSTNAME=$hostName bash 2>&1 | '
            'tee /tmp/infect.log',
        'labels': {},
        'automount': true,
        'location': region!,
      };
      print('Decoded data: $data');

      serverCreateResponse = await client.post('/servers', data: data);
      success = true;
    } on DioError catch (e) {
      print(e);
      hetznerError = e;
    } catch (e) {
      print(e);
    } finally {
      close(client);
    }

    String? apiResultMessage = serverCreateResponse?.statusMessage;
    if (hetznerError != null &&
        hetznerError.response!.data['error']['code'] == 'uniqueness_error') {
      apiResultMessage = 'uniqueness_error';
    }

    return GenericResult(
      data: serverCreateResponse?.data,
      success: success && hetznerError == null,
      code: serverCreateResponse?.statusCode ??
          hetznerError?.response?.statusCode,
      message: apiResultMessage,
    );
  }

  Future<GenericResult<void>> deleteServer({
    required final int serverId,
  }) async {
    final Dio client = await getClient();
    try {
      await client.delete('/servers/$serverId');
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: null,
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(success: true, data: null);
  }

  Future<GenericResult<void>> restart(final int serverId) async {
    final Dio client = await getClient();
    try {
      await client.post('/servers/$serverId/actions/reset');
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: null,
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(success: true, data: null);
  }

  Future<GenericResult<void>> powerOn(final int serverId) async {
    final Dio client = await getClient();
    try {
      await client.post('/servers/$serverId/actions/poweron');
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: null,
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(success: true, data: null);
  }

  Future<GenericResult<Map<String, dynamic>>> getMetrics(
    final int serverId,
    final DateTime start,
    final DateTime end,
    final String type,
  ) async {
    Map<String, dynamic> metrics = {};
    final Dio client = await getClient();
    try {
      final Map<String, dynamic> queryParameters = {
        'start': start.toUtc().toIso8601String(),
        'end': end.toUtc().toIso8601String(),
        'type': type
      };
      final Response res = await client.get(
        '/servers/$serverId/metrics',
        queryParameters: queryParameters,
      );
      metrics = res.data['metrics'];
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: {},
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(data: metrics, success: true);
  }

  Future<GenericResult<List<HetznerServerInfo>>> getServers() async {
    List<HetznerServerInfo> servers = [];

    final Dio client = await getClient();
    try {
      final Response response = await client.get('/servers');
      servers = response.data!['servers']
          .map<HetznerServerInfo>(
            (final e) => HetznerServerInfo.fromJson(e),
          )
          .toList();
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: [],
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(data: servers, success: true);
  }

  Future<GenericResult<List>> getAvailableLocations() async {
    List locations = [];

    final Dio client = await getClient();
    try {
      final Response response = await client.get(
        '/locations',
      );

      locations = response.data!['locations'];
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: [],
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(success: true, data: locations);
  }

  Future<GenericResult<List>> getAvailableServerTypes() async {
    List types = [];

    final Dio client = await getClient();
    try {
      final Response response = await client.get(
        '/server_types',
      );
      types = response.data!['server_types'];
    } catch (e) {
      print(e);
      return GenericResult(
        data: [],
        success: false,
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(data: types, success: true);
  }

  Future<GenericResult<void>> createReverseDns({
    required final int serverId,
    required final String ip4,
    required final String dnsPtr,
  }) async {
    final Dio client = await getClient();
    try {
      await client.post(
        '/servers/$serverId/actions/change_dns_ptr',
        data: {
          'ip': ip4,
          'dns_ptr': dnsPtr,
        },
      );
    } catch (e) {
      print(e);
      return GenericResult(
        success: false,
        data: null,
        message: e.toString(),
      );
    } finally {
      close(client);
    }

    return GenericResult(success: true, data: null);
  }
}