import * as plugins from './taskbuffer.plugins'
import * as helpers from './taskbuffer.classes.helpers'

export interface ITaskFunction {
  (x?: any): PromiseLike<any>
}

export class Task {
  name: string
  taskFunction: ITaskFunction
  buffered: boolean
  preTask: Task
  afterTask: Task

  // initialize by default
  running: boolean = false
  bufferRunner = new helpers.BufferRunner(this)
  cycleCounter = new helpers.CycleCounter(this)
  idle: boolean = true
  private _state: string = 'ready'

  constructor(optionsArg: {
    taskFunction: ITaskFunction,
    preTask?: Task,
    afterTask?: Task,
    buffered?: boolean,
    bufferMax?: number,
    name?: string
  }) {
    let options = optionsArg
    this.taskFunction = optionsArg.taskFunction
    this.preTask = options.preTask
    this.afterTask = options.afterTask
    this.idle = !this.running
    this.buffered = options.buffered
    this.bufferRunner.setBufferMax(options.bufferMax)
    this.name = options.name
  }

  /**
   * trigger the task. Will trigger buffered if this.buffered is true
   */
  trigger (x?): Promise<any> {
    if (this.buffered) {
      return this.triggerBuffered(x)
    } else {
      return this.triggerUnBuffered(x)
    }
  }

  /**
   * trigger task unbuffered.
   */
  triggerUnBuffered (x?): Promise<any> {
    return helpers.runTask(this, { x: x })
  }

  /**
   * trigger task buffered.
   */
  triggerBuffered (x?): Promise<any> {
    return this.bufferRunner.trigger(x)
  }

  get state (): string {
    return this._state
  }
  set state (stateArg: string) {
    if (stateArg === 'locked') {
      this._state = 'locked'
    } else {
      plugins.beautylog.error('state type ' + stateArg + ' could not be set')
    }
  }
}