import { ArgumentsHost, Catch, Logger } from '@nestjs/common';
import { BaseRpcExceptionFilter } from '@nestjs/microservices';
import { Observable } from 'rxjs';

@Catch()
export class LogCauseExceptionFilter extends BaseRpcExceptionFilter {
  private static readonly causeLogger = new Logger('RpcExceptionsHandler');

  catch(exception: any, host: ArgumentsHost): Observable<any> {
    const response = super.catch(exception, host);
    const cause = exception.cause;
    if (cause) {
      if (this.isError(cause)) {
        LogCauseExceptionFilter.causeLogger.error(
          'Caused by: ' + cause.message,
          cause.stack,
        );
      } else {
        LogCauseExceptionFilter.causeLogger.error('Caused by: ' + cause);
      }
    }
    return response;
  }
}