import './availability.css'
import { AvailabilityInfo } from './availability-info'
import { AvailabilityService } from './availability-service'

declare function waitForKeyElements(selectorOrFunction: any, callback: any, waitOnce: boolean): any;

export class Availability {
  private _service: AvailabilityService
  private _availabilities: AvailabilityInfo[] = []

  constructor(service: AvailabilityService) {
    this._service = service
  }

  public start() {
    this._service.subscribe((avs) => {
      this._availabilities = avs
      this.updateAllIndicators()
    })
    waitForKeyElements('people-tile', (element: HTMLElement) => { this.decorateTile(element) }, false)
  }

  private decorateTile(tile: HTMLElement) {
    if (tile.querySelector('.tapi-availability')) {
      return
    }
    var extEl = tile.querySelector('span[data-id="extPhone"]') as HTMLElement
    if (!extEl) {
      return
    }
    var extension = extEl.textContent.trim()

    var indicator = document.createElement('div')
    indicator.classList.add('tapi-availability')
    indicator.dataset.tapiExtension = extension
    tile.appendChild(indicator)
    this.updateIndicator(indicator)

    var avatarContainer = tile.querySelector('app-avatar .avatar-container') as HTMLElement
    if (avatarContainer) {
      var square = document.createElement('i')
      square.classList.add('tapi-avatar-square')
      square.dataset.tapiExtension = extension
      avatarContainer.appendChild(square)
      this.updateSquare(square)
    }
  }

  private updateAllIndicators() {
    var indicators = document.getElementsByClassName('tapi-availability')
    for (var i of indicators) {
      this.updateIndicator(i as HTMLElement)
    }
    var squares = document.getElementsByClassName('tapi-avatar-square')
    for (var s of squares) {
      this.updateSquare(s as HTMLElement)
    }
  }

  private updateIndicator(indicator: HTMLElement) {
    var extension = indicator.dataset.tapiExtension
    var entry = this._availabilities.find(a => a.extension === extension)
    if (!entry) {
      indicator.innerHTML = ''
      return
    }
    var dotClass = entry.loggedIn ? 'tapi-dot-on' : 'tapi-dot-off'
    var time = ''
    if (entry.lastStamp) {
      var d = new Date(entry.lastStamp)
      var pad = (n: number) => n.toString().padStart(2, '0')
      time = pad(d.getDate()) + '.' + pad(d.getMonth() + 1) + '. ' + pad(d.getHours()) + ':' + pad(d.getMinutes())
    }
    indicator.innerHTML = '<span class="tapi-dot ' + dotClass + '"></span><small>' + time + '</small>'
  }

  private updateSquare(square: HTMLElement) {
    var extension = square.dataset.tapiExtension
    var entry = this._availabilities.find(a => a.extension === extension)
    square.classList.remove('tapi-square-on', 'tapi-square-off')
    if (!entry) {
      square.style.display = 'none'
      return
    }
    square.style.display = ''
    square.classList.add(entry.loggedIn ? 'tapi-square-on' : 'tapi-square-off')
  }
}