// TaskChain chains tasks
// and extends Task

import * as plugins from './taskbuffer.plugins'
import { Task } from './taskbuffer.classes.task'
import helpers = require('./taskbuffer.classes.helpers')

export class Taskchain extends Task {
  taskArray: Task[]
  private _oraObject
  constructor(optionsArg: {
    taskArray: Task[],
    name?: string,
    log?: boolean,
    buffered?: boolean,
    bufferMax?: number
  }) {
    let options = plugins.lodash.merge(
      {
        name: 'unnamed Taskchain',
        log: false
      },
      optionsArg,
      {
        taskFunction: (x: any) => { // this is the function that gets executed when TaskChain is triggered
          let done = plugins.q.defer() // this is the starting Deferred object
          let taskCounter = 0 // counter for iterating async over the taskArray
          let iterateTasks = (x) => {
            if (typeof this.taskArray[ taskCounter ] !== 'undefined') {
              this._oraObject.text(this.name + ' running: Task' + this.taskArray[ taskCounter ].name)
              this.taskArray[ taskCounter ].trigger(x)
                .then((x) => {
                  plugins.beautylog.ok(this.taskArray[ taskCounter ].name)
                  taskCounter++
                  iterateTasks(x)
                })
            } else {
              this._oraObject.endOk('Taskchain "' + this.name + '" completed successfully')
              done.resolve(x)
            }
          }
          iterateTasks(x)
          return done.promise
        }
      }
    )
    super(options)
    this.taskArray = optionsArg.taskArray
    this._oraObject = plugins.beautylog.ora
    if (optionsArg.log === true) {
      this._oraObject.start()
    }
  }
  addTask (taskArg: Task) {
    this.taskArray.push(taskArg)
  }
  removeTask (taskArg: Task) {
    // TODO:
  }
  shiftTask () {
    // TODO:
  }
}