import { Metadata } from '@grpc/grpc-js';
import { Inject, Injectable } from '@nestjs/common';
import { ClientGrpc } from '@nestjs/microservices';
import { NetworkConfig } from '@dadosfera/protospack-v2';
import { lastValueFrom } from 'rxjs';
import {
  CreateNetworkConfigReq,
  CreateNetworkConfigRes,
  DeleteNetworkConfigRes,
  FindAllNetworkConfigsRes,
  FindNetworkConfigByidDetailsRes,
  FindNetworkConfigByidRes,
  UpdateNetworkConfigReq,
  UpdateNetworkConfigRes,
} from './dto/network-config';
import { NetworkConfigGrpcClient } from './network-config-client.config';

@Injectable()
export class NetworkConfigService {
  private networkConfigReadClient: NetworkConfig.ReadService.NetworkConfigReadService;
  private networkConfigWriteClient: NetworkConfig.WriteService.NetworkConfigWriteService;
  constructor(
    @Inject(NetworkConfigGrpcClient.name)
    private readonly grpcClient: ClientGrpc,
  ) {
    this.networkConfigReadClient =
      grpcClient.getService<NetworkConfig.ReadService.NetworkConfigReadService>(
        NetworkConfig.ProtoServices.NetworkConfigReadService,
      );
    this.networkConfigWriteClient =
      grpcClient.getService<NetworkConfig.WriteService.NetworkConfigWriteService>(
        NetworkConfig.ProtoServices.NetworkConfigWriteService,
      );
  }
  async findAllNetworkConfigs({
    body,
    info,
  }): Promise<FindAllNetworkConfigsRes> {
    const { search, page, size, filters } = body;
    const { language, customer_id, customer_name, user_id } = info;

    const meta = new Metadata();

    meta.add('language', language);
    meta.add('customer_id', customer_id);
    meta.add('customer_name', customer_name);
    meta.add('user_id', user_id);

    return lastValueFrom(
      this.networkConfigReadClient.NetworkConfigFindAll(
        { search, filters: JSON.stringify(filters), page, size },
        meta,
      ),
    );
  }

  async findNetworkConfigById(id: string): Promise<FindNetworkConfigByidRes> {
    const { network_config } = await lastValueFrom(
      this.networkConfigReadClient.NetworkConfigFindOneById({
        id,
      }),
    );
    return { network_config };
  }

  async findNetworkConfigByIdDetails(
    id: string,
    info?,
  ): Promise<FindNetworkConfigByidDetailsRes> {
    const { customer_name, customer_id, language } = info;

    const meta = new Metadata();

    meta.add('customer_name', customer_name);
    meta.add('customer_id', customer_id);
    meta.add('language', language);

    const { network_config } = await lastValueFrom(
      this.networkConfigReadClient.NetworkConfigFindOneDetailsById(
        { id },
        meta,
      ),
    );

    Object.assign(network_config, {
      properties: JSON.parse(network_config.properties),
    });
    return { network_config };
  }

  async createNetworkConfig(
    body: CreateNetworkConfigReq,
    file: Express.Multer.File,
    { customer_name, customer_id, user_id },
  ): Promise<CreateNetworkConfigRes> {
    const { description, name, network_type_id, network_type_name } = body;

    const type = 'vpn';
    const plugin = 'openvpn';

    const OVPN_FILE_STRING = Buffer.from(file.buffer).toString();

    const meta = new Metadata();

    meta.add('customer_id', customer_id);
    meta.add('customer_name', customer_name);
    meta.add('user_id', user_id);

    const { network_config } = await lastValueFrom(
      this.networkConfigWriteClient.NetworkConfigCreate(
        {
          description,
          name,
          properties: JSON.stringify({
            OVPN_FILE: OVPN_FILE_STRING,
            plugin,
          }),
          type,
          network_type_id,
          network_type_name,
          plugin,
        },
        meta,
      ),
    );
    return { network_config };
  }

  async updateNetworkConfig(
    body: UpdateNetworkConfigReq,
    network_config_id: string,
  ): Promise<UpdateNetworkConfigRes> {
    const { description, name } = body;
    const { network_config } = await lastValueFrom(
      this.networkConfigWriteClient.NetworkConfigUpdate({
        id: network_config_id,
        description,
        name,
      }),
    );
    return { network_config };
  }

  async deleteNetworkConfig(
    network_config_id: string,
    { customer_name, customer_id },
  ): Promise<DeleteNetworkConfigRes> {
    const meta = new Metadata();
    meta.add('customer_id', customer_id);
    meta.add('customer_name', customer_name);
    return lastValueFrom(
      this.networkConfigWriteClient.NetworkConfigDelete(
        { id: network_config_id },
        meta,
      ),
    );
  }
}