import { Injectable } from '@angular/core';
import { catchError, exhaustMap, map, tap } from 'rxjs/operators';

import { RPCSubscriber } from '@loafer/ng-rpc';
import { LoggerService } from '@loafer/ng-logger';

import { DiscoverSelector } from '../store';
import * as DiscoverStore from '../store/discover';

import {
  Zone,
  Host,
  Port,
  Service,
} from '@overflow/commons-typescript/model/discovery';
import { DiscoverySubject } from '../core/discovery-subject';

@Injectable()
export class DiscoverySubscriber {
  discoverySubject: DiscoverySubject | null;

  public constructor(
    private loggerService: LoggerService,
  ) {
  }

  /**
   * name
   */
  public setDiscoverySubject(discoverySubject: DiscoverySubject) {
    this.discoverySubject = discoverySubject;
  }

  private publish(method: string, params: any): void {
    if (null !== this.discoverySubject) {
      this.discoverySubject.next({method: method, params: params});
    }
  }

  @RPCSubscriber({method: 'DiscoveryService.discoveryStart'})
  public discoveryStart(startDate: Date): void {
    this.loggerService.debug('DiscoverySubscriber.discoveryStart startDate:', startDate);

    this.publish('DiscoveryService.discoveryStart', startDate);
  }

  @RPCSubscriber({method: 'DiscoveryService.discoveryStop'})
  public discoveryStop(stopDate: Date): void {
    this.loggerService.debug('DiscoverySubscriber.discoveryStop stopDate:', stopDate);

    this.publish('DiscoveryService.discoveryStop', stopDate);
    this.setDiscoverySubject(null);
  }


  @RPCSubscriber({method: 'DiscoveryService.discoveredZone'})
  public discoveredZone(zone: Zone): void {
    this.loggerService.debug('DiscoverySubscriber.discoveredZone zone:', zone);

    this.publish('DiscoveryService.discoveredZone', zone);
  }
  @RPCSubscriber({method: 'DiscoveryService.discoveredHost'})
  public discoveredHost(host: Host): void {
    this.loggerService.debug('DiscoverySubscriber.discoveredHost host:', host);

    this.publish('DiscoveryService.discoveredHost', host);
  }
  @RPCSubscriber({method: 'DiscoveryService.discoveredPort'})
  public discoveredPort(port: Port): void {
    this.publish('DiscoveryService.discoveredPort', port);
  }
  @RPCSubscriber({method: 'DiscoveryService.discoveredService'})
  public discoveredService(service: Service): void {
    this.loggerService.debug('DiscoverySubscriber.discoveredService service:', service);
    this.publish('DiscoveryService.discoveredService', service);
  }
}