import { ElsSmartlogDestination, type IStandardLogParams } from './els.classes.smartlogdestination.js';

export class ElasticScheduler {
  elasticSearchRef: ElsSmartlogDestination<any>;
  docsScheduled = false;
  docsStorage: any[] = [];

  // maximum size of the buffer
  maxBufferSize = 500;

  constructor(elasticLogRefArg: ElsSmartlogDestination<any>) {
    this.elasticSearchRef = elasticLogRefArg;
  }

  public addFailedDoc(objectArg: any | IStandardLogParams) {
    this.addToStorage(objectArg);
    this.setRetry();
  }
  
  public scheduleDoc(logObject: any) {
    this.addToStorage(logObject);
  }

  private addToStorage(logObject: any) {
    this.docsStorage.push(logObject);
    
    // if buffer is full, send logs immediately
    if (this.docsStorage.length >= this.maxBufferSize) {
      this.flushLogsToElasticSearch();
    }
  }

  private flushLogsToElasticSearch() {
    const oldStorage = this.docsStorage;
    this.docsStorage = [];
    
    for (let logObject of oldStorage) {
      this.elasticSearchRef.log(logObject, true);
    }
  }

  public setRetry() {
    setTimeout(() => {
      this.flushLogsToElasticSearch();

      if (this.docsStorage.length === 0) {
        console.log('ElasticLog retry success!!!');
        this.docsScheduled = false;
      } else {
        console.log('ElasticLog retry failed');
        this.setRetry();
      }
    }, 5000);
  }

  public deferSend() {
    if (!this.docsScheduled) {
      console.log('Retry ElasticLog in 5 seconds!');
      this.docsScheduled = true;
      this.setRetry();
    }
  }
}