import Timeout = NodeJS.Timeout
import { RequestTimeoutError } from '../errors'

export class Timer {
  private readonly duration: number
  private timer: Timeout | null

  constructor (duration: number) {
    this.timer = null
    this.duration = duration
  }

  public run (): Promise<void> {
    return new Promise((resolve, reject) => {
      this.timer = setTimeout(() => {
        reject(new RequestTimeoutError(this.duration))
      }, this.duration)
    })
  }

  public destroy (): void {
    if (!this.timer) {
      return
    }
    clearTimeout(this.timer)
  }

}