import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { exec } from 'child_process';

@Injectable()
export class RNDCService {
  private host = this.config.get<string>('rndc.host');
  private port = this.config.get<number>('rndc.port');
  private keyFile = this.config.get<string>('rndc.keyFile');

  constructor(private config: ConfigService) {}

  private async rndc(command: string, data: string): Promise<string> {
    return new Promise((resolve, reject) => {
      exec(
        `rndc -k ${this.keyFile} -s ${this.host} -p ${this.port} ${command} ${data}`,
        (error, stdout) => {
          if (error) {
            reject(error);
            return;
          }
          resolve(stdout);
        },
      );
    });
  }

  public async reload(domain: string): Promise<string> {
    return this.rndc('reload', domain);
  }
}