export default defineNuxtPlugin(() => {
  const router = useRouter()
  const { reportPv } = usePvcv()

  let lastFullPath = ''
  let lastReportedAt = 0

  function track(to, from) {
    if (!to || to.fullPath === lastFullPath) return
    const now = Date.now()
    if (now - lastReportedAt < 300 && to.fullPath === lastFullPath) return

    const referrer = from?.fullPath
      ? `${window.location.origin}${from.fullPath}`
      : document.referrer

    lastFullPath = to.fullPath
    lastReportedAt = now
    reportPv(to, { referrer })
  }

  router.afterEach((to, from) => {
    window.setTimeout(() => track(to, from), 0)
  })

  window.setTimeout(() => {
    track(router.currentRoute.value, null)
  }, 0)
})