import { version } from '../package.json'
import { addClass, errorHandle, isMobile, query, replaceElement, supportsFlex } from './utils'

export default class Template {
  constructor(art) {
    this.art = art
    const { option, constructor } = art

    if (option.container instanceof Element) {
      this.$container = option.container
    }
    else {
      this.$container = query(option.container)
      errorHandle(this.$container, `No container element found by ${option.container}`)
    }

    errorHandle(supportsFlex(), 'The current browser does not support flex layout')

    const type = this.$container.tagName.toLowerCase()
    errorHandle(type === 'div', `Unsupported container element type, only support 'div' but got '${type}'`)

    errorHandle(
      constructor.instances.every(ins => ins.template.$container !== this.$container),
      'Cannot mount multiple instances on the same dom element',
    )

    this.query = this.query.bind(this)
    this.$container.dataset.artId = art.id
    this.init()
  }

  static get html() {
    return `
          <div class="art-video-player art-subtitle-show art-layer-show art-control-show art-mask-show">
            <video class="art-video">
              <track default kind="metadata" src=""></track>
            </video>
            <div class="art-poster"></div>
            <div class="art-subtitle"></div>
            <div class="art-danmuku"></div>
            <div class="art-layers"></div>
            <div class="art-mask">
              <div class="art-state"></div>
            </div>
            <div class="art-bottom">
              <div class="art-progress"></div>
              <div class="art-controls">
                <div class="art-controls-left"></div>
                <div class="art-controls-center"></div>
                <div class="art-controls-right"></div>
              </div>
            </div>
            <div class="art-loading"></div>
            <div class="art-notice">
              <div class="art-notice-inner"></div>
            </div>
            <div class="art-settings"></div>
            <div class="art-info">
              <div class="art-info-panel">
                <div class="art-info-item">
                  <div class="art-info-title">Player version:</div>
                  <div class="art-info-content">${version}</div>
                </div>
                <div class="art-info-item">
                  <div class="art-info-title">Video url:</div>
                  <div class="art-info-content" data-video="src"></div>
                </div>
                <div class="art-info-item">
                  <div class="art-info-title">Video volume:</div>
                  <div class="art-info-content" data-video="volume"></div>
                </div>
                <div class="art-info-item">
                  <div class="art-info-title">Video time:</div>
                  <div class="art-info-content" data-video="currentTime"></div>
                </div>
                <div class="art-info-item">
                  <div class="art-info-title">Video duration:</div>
                  <div class="art-info-content" data-video="duration"></div>
                </div>
                <div class="art-info-item">
                  <div class="art-info-title">Video resolution:</div>
                  <div class="art-info-content">
                    <span data-video="videoWidth"></span> x <span data-video="videoHeight"></span>
                  </div>
                </div>
              </div>
              <div class="art-info-close">[x]</div>
            </div>
            <div class="art-contextmenus"></div>
          </div>
        `
  }

  query(className) {
    return query(className, this.$container)
  }

  init() {
    const { option } = this.art

    if (!option.useSSR) {
      this.$container.innerHTML = Template.html
    }

    this.$player = this.query('.art-video-player')
    this.$video = this.query('.art-video')
    this.$track = this.query('track')
    this.$poster = this.query('.art-poster')
    this.$subtitle = this.query('.art-subtitle')
    this.$danmuku = this.query('.art-danmuku')
    this.$bottom = this.query('.art-bottom')
    this.$progress = this.query('.art-progress')
    this.$controls = this.query('.art-controls')
    this.$controlsLeft = this.query('.art-controls-left')
    this.$controlsCenter = this.query('.art-controls-center')
    this.$controlsRight = this.query('.art-controls-right')
    this.$layer = this.query('.art-layers')
    this.$loading = this.query('.art-loading')
    this.$notice = this.query('.art-notice')
    this.$noticeInner = this.query('.art-notice-inner')
    this.$mask = this.query('.art-mask')
    this.$state = this.query('.art-state')
    this.$setting = this.query('.art-settings')
    this.$info = this.query('.art-info')
    this.$infoPanel = this.query('.art-info-panel')
    this.$infoClose = this.query('.art-info-close')
    this.$contextmenu = this.query('.art-contextmenus')

    if (option.proxy) {
      const video = option.proxy.call(this.art, this.art)
      errorHandle(
        video instanceof HTMLVideoElement || video instanceof HTMLCanvasElement,
        `Function 'option.proxy' needs to return 'HTMLVideoElement' or 'HTMLCanvasElement'`,
      )
      replaceElement(video, this.$video)
      video.className = 'art-video'
      this.$video = video
    }

    if (option.backdrop) {
      addClass(this.$player, 'art-backdrop')
    }

    if (isMobile) {
      addClass(this.$player, 'art-mobile')
    }
  }

  destroy(removeHtml) {
    this.$video.src = ''
    if (removeHtml) {
      this.$container.innerHTML = ''
    }
    else {
      addClass(this.$player, 'art-destroy')
    }
  }
}