/**
 * 定义基础配置
 * 官方文档 https://tongji.baidu.com/open/api/more?p=guide_overview
 */
class BAIDU {
  siteId: string
  isDebug: boolean

  constructor(siteId: string = '', isDebug: boolean = false) {
    this.siteId = siteId
    this.isDebug = isDebug
  }

  /**
   * 初始化
   */
  init() {
    window._hmt = window._hmt ? window._hmt : []
    const SCRIPT = document.createElement('script')
    SCRIPT['async'] = true
    SCRIPT['src'] = `https://hm.baidu.com/hm.js?${this.siteId}`
    document.querySelector('head')?.appendChild(SCRIPT)

    if (this.isDebug) {
      console.log(
        `[vue-baidu-analytics] siteId load done.\nsiteId:    ${this.siteId}`
      )
    }
  }

  /**
   * 设置要响应的站点
   */
  setAccount() {
    window._hmt.push(['_setAccount', this.siteId])
  }

  /**
   * 提交PV、UV
   */
  trackPageview(pageUrl: string) {
    // 如果页面链接没传或者无效链接，则默认为根域名
    if (!pageUrl || typeof pageUrl !== 'string') {
      pageUrl = '/'
    }

    // 如果页面链接带上了域名，则需要过滤掉
    if (pageUrl.startsWith('http')) {
      const PAGE_CUT = pageUrl.split('/')
      const HOST_NAME = `${PAGE_CUT[0]}//${PAGE_CUT[2]}`
      pageUrl = pageUrl.replace(HOST_NAME, '')
    }

    // 设置响应 id 并提交数据
    this.setAccount()
    window._hmt.push(['_trackPageview', pageUrl])

    if (this.isDebug) {
      console.log(
        `[vue-baidu-analytics] track pv done.\nsiteId:    ${this.siteId}\npageUrl:   ${pageUrl}`
      )
    }
  }

  /**
   * 提交点击事件
   */
  trackEvent(category: string, action: string, label: string, value: number) {
    // 前两个是必填项
    if (
      typeof category !== 'string' ||
      typeof action !== 'string' ||
      !category ||
      !action
    ) {
      throw new Error(
        '[vue-baidu-analytics] Missing necessary category and operation information, and must be of type string.'
      )
    }

    // 重置一些无效的默认值
    if (!label || typeof label !== 'string') {
      label = ''
    }

    if (!Number(value)) {
      value = 1
    }

    // 设置响应id并提交数据
    this.setAccount()
    window._hmt.push(['_trackEvent', category, action, label, value])

    if (this.isDebug) {
      console.log(
        `[vue-baidu-analytics] track event done.\nsiteId:   ${this.siteId}\ncategory: ${category}\naction:   ${action}\nlabel:    ${label}\nvalue:    ${value}`
      )
    }
  }
}

export default BAIDU