import { commitinfo } from './00_commitinfo_data.js';
import * as plugins from './smartmongo.plugins.js';

export class SmartMongo {
  // STATIC
  public static async createAndStart(replCountArg: number = 1) {
    const smartMongoInstance = new SmartMongo();
    await smartMongoInstance.start(replCountArg);
    return smartMongoInstance;
  }

  // INSTANCE
  private _readyDeferred = plugins.smartpromise.defer();
  public readyPromise = this._readyDeferred.promise;
  public mongoReplicaSet: plugins.mongoPlugin.MongoMemoryReplSet;

  constructor() {}

  public async start(countArg: number = 1) {
    this.mongoReplicaSet = await plugins.mongoPlugin.MongoMemoryReplSet.create({
      replSet: { count: countArg },
      instanceOpts: [
        {
          storageEngine: 'wiredTiger',
        },
      ],
    });
    this._readyDeferred.resolve();
    console.log(`mongoReplicaSet with ${countArg} replicas started.`);
    console.log(`@pushrocks/smartmongo version ${commitinfo.version}`);
  }

  public async getMongoDescriptor(): Promise<plugins.smartdata.IMongoDescriptor> {
    await this.readyPromise;
    return {
      mongoDbUrl: this.mongoReplicaSet.getUri(),
    };
  }

  public async stop() {
    await this.mongoReplicaSet.stop();
    await this.mongoReplicaSet.cleanup();
  }

  public async stopAndDumpToDir(dirArg: string) {
    const dumpDir = plugins.smartpath.transform.makeAbsolute(dirArg);
    const mongodumpInstance = new plugins.mongodump.MongoDump();
    const mongodumpTarget = await mongodumpInstance.addMongoTargetByMongoDescriptor(await this.getMongoDescriptor());
    await mongodumpTarget.dumpAllCollectionsToDir(dumpDir);
    await mongodumpInstance.stop();
    await this.stop();
  }
}