import * as plugins from './spark.plugins.js';
import * as paths from './spark.paths.js';
import { Spark } from './spark.classes.spark.js';
import { logger } from './spark.logging.js';

/**
 * this class takes care of updating the services that are managed by spark
 */
export class SparkServicesManager {
  public sparkRef: Spark;
  public dockerHost: plugins.docker.DockerHost;
  public smartupdate: plugins.smartupdate.SmartUpdate;
  
  /**
   * the services that are managed by spark
   */
  services: Array<{
    name: string;
    image: string;
    url: string;
    port: string;
    environment: string;
    secretJson: any;
  }> = [];
  
  constructor(sparkrefArg: Spark) {
    this.sparkRef = sparkrefArg;
    this.dockerHost = new plugins.docker.DockerHost({});
    this.smartupdate = new plugins.smartupdate.SmartUpdate();
  }

  /**
   * start the instance
   */
  public async start() {
    await this.dockerHost.activateSwarm();
  }

  public async updateServices() {
    for (const service of this.services) {
      const existingService = await plugins.docker.DockerService.getServiceByName(
        this.dockerHost,
        service.name
      );
      const existingServiceSecret = await plugins.docker.DockerSecret.getSecretByName(
        this.dockerHost,
        `${service.name}Secret`
      );
      if (existingService) {
        const needsUpdate: boolean = await existingService.needsUpdate();
        if (!needsUpdate) {
          logger.log('info', `service >>${service.name}<< not needing update.`);
          // we simply return here to end the functions
          return;
        }
        // continuing here means we need to update the service
        logger.log('ok', `${service.name} needs to be updated!`);
        await existingService.remove();
        await existingServiceSecret.remove();
      }
      if (!existingService && existingServiceSecret) {
        await existingServiceSecret.remove();
      }

      const newServiceImage = await plugins.docker.DockerImage.createFromRegistry(
        this.dockerHost,
        {
          creationObject: {
            imageUrl: service.image,
          },
        }
      );
      const newServiceSecret = await plugins.docker.DockerSecret.createSecret(this.dockerHost, {
        name: `${service.name}Secret`,
        contentArg: plugins.smartjson.stringify(service.secretJson),
        version: await newServiceImage.getVersion(),
        labels: {},
      });

      const newService = await plugins.docker.DockerService.createService(this.dockerHost, {
        image: newServiceImage,
        labels: {},
        name: service.name,
        networkAlias: service.name,
        networks: [],
        secrets: [newServiceSecret],
        ports: [`${service.port}:${service.secretJson.SERVEZONE_PORT}`],
      });
      logger.log('ok', `updated service >>${newService.Spec.Name}<<!`);
    }
    
    logger.log('success', `updated ${this.services.length} services!`);
  }
}