export interface Scheduler {
  setTimeout(f: Function, d: number): number
  setInterval(f: Function, i: number): number
  clearInterval(id: number): any
  clearTimeout(id: number): any
  now(): number
}

/** @hidden */
export const defaultScheduler: Scheduler = {
  setTimeout(f, d) {
    return setTimeout(f, d)
  },
  setInterval(f, i) {
    return setInterval(f, i)
  },
  clearInterval(id) {
    return clearInterval(id)
  },
  clearTimeout(id) {
    return clearTimeout(id)
  },
  now() {
    return new Date().getTime()
  },
}

const GlobalScheduler = {
  scheduler: defaultScheduler,
}

export function getScheduler(): Scheduler {
  return GlobalScheduler.scheduler
}

export function setScheduler(newScheduler: Scheduler) {
  GlobalScheduler.scheduler = newScheduler
}

export default GlobalScheduler