import { singleton } from '../decorators/singleton'
import Clock from './ClockTimer'
import { Delayed } from './Delayed'

/**
 * 全局定时器
 */
@singleton
export class Schedule {
  clock: Clock = new Clock()
  gameClock: Map<string, Delayed> = new Map()

  public start() {
    this.clock.start()
  }

  beginSchedule(millisecond: number, handler: Function, name: string): void {
    if (this.gameClock.has(name) && this.gameClock.get(name)?.active) {
      console.log(`当前已存在进行中的clock: ${ name }`)
      this.gameClock.get(name).clear()
      this.gameClock.delete(name)
    }
    let timeOverFun = function () {
      handler && handler()
    }
    this.gameClock.set(name, this.clock.setTimeout(timeOverFun, millisecond, name))
  }

  /**
   * 取消某个计时器
   */
  stopSchedule(name: string): number {
    console.log(`manual stop schedule: ${ name }`)
    if (!this.gameClock.has(name)) {
      return -1
    }
    let clock = this.gameClock.get(name)
    if (!clock.active) {
      this.gameClock.delete(name)
      return -1
    }
    let time = clock.elapsedTime
    clock.clear()
    this.gameClock.delete(name)
    return time
  }

  /**
   * 判断某个定时器是否active
   * @param {string} name
   * @return {boolean}
   */
  scheduleActive(name: string): boolean {
    return this.gameClock.has(name) && this.gameClock.get(name).active
  }
}