import { Injectable, Logger } from '@nestjs/common';
import nano from 'nano';
import configuration from '../configs/app';

const config = configuration();

@Injectable()
export class CouchDb {
  private static logger = new Logger(CouchDb.name);
  private static couchdb: nano.ServerScope | null = null;

  static getCouchDb(): nano.ServerScope {
    if (CouchDb.couchdb) {
      return CouchDb.couchdb;
    }
    const n = nano(config.couchDbUrl);
    CouchDb.logger.log(`CouchDb connected by url ${config.couchDbUrl} ...`);
    CouchDb.couchdb = n;
    return CouchDb.couchdb;
  }
}