import { EventEmitter } from "events";
import { ICommunicationInterface, requestTaskMsg, responseTaskMsg, availableServices } from "../dispatcher/nopeDispatcher";
import { getLogger } from "../logger/getLogger";

/**
 * A Communication Layer for the Dispatchers.
 * Here, only a Events are used.
 *
 * @export
 * @class EventLayer
 * @implements {ICommunicationInterface}
 */
export class EventLayer implements ICommunicationInterface {
  emitRpcRequest(name: string, request: requestTaskMsg): void {
    this._emitter.emit(name, request);
  }
  emitRpcResult(result: responseTaskMsg): void {
    this._emitter.emit('result',result);
  }
  onRpcResult(name: string, cb: (result: responseTaskMsg) => void): void {
    this._emitter.on(name, cb);
  }
  offRpcResult(name: string, cb: (result: responseTaskMsg) => void): void {
    this._emitter.off(name, cb);
  }
  onRpcRequest(name: string, cb: (data: requestTaskMsg) => void): void {
    this._emitter.on(name, cb);
  }
  offRpcRequest(name: string, cb: (data: requestTaskMsg) => void): void {
    this._emitter.off(name, cb);
  }
  emitNewServicesAvailable(services: availableServices): void {
    this._emitter.emit('services', services)
  }
  onNewServicesAvailable(cb: (services: availableServices) => void) {
    this._emitter.on('services', cb);
  }

  protected _emitter = new EventEmitter();
  protected _logger = getLogger('info', 'Event-Layer');
}