import { Task } from './taskbuffer.classes.task.js';
import { logger } from './taskbuffer.logging.js';

export class BufferRunner {
  public task: Task;
  // initialize by default
  public bufferCounter: number = 0;

  constructor(taskArg: Task<any>) {
    this.task = taskArg;
  }

  public trigger(x: any): Promise<any> {
    if (!(this.bufferCounter >= this.task.bufferMax)) {
      this.bufferCounter++;
    }
    const returnPromise: Promise<any> =
      this.task.cycleCounter.getPromiseForCycle(this.bufferCounter);
    if (!this.task.running) {
      this._run(x);
    }
    return returnPromise;
  }

  private async _run(x: any) {
    this.task.running = true;
    while (this.bufferCounter > 0) {
      try {
        const result = await Task.runTask(this.task, { x: x });
        this.bufferCounter--;
        this.task.cycleCounter.informOfCycle(result);
      } catch (err) {
        logger.log('error', `BufferRunner: task "${this.task.name || 'unnamed'}" failed: ${err instanceof Error ? err.message : String(err)}`);
        this.bufferCounter--;
        if (this.task.catchErrors) {
          this.task.cycleCounter.informOfCycle(undefined);
        } else {
          this.task.cycleCounter.informOfCycleError(err instanceof Error ? err : new Error(String(err)));
        }
      }
    }
    this.task.running = false;
  }
}