'use client'

import { isBrowser } from 'common'
import { usePathname } from 'next/navigation'
import { useCallback, useEffect } from 'react'
import { useConsent } from 'ui-patterns/ConsentToast'
import { IS_PLATFORM } from '~/lib/constants'
import { unauthedAllowedPost } from '~/lib/fetch/fetchWrappers'

const useTelemetryWithConsent = () => {
  const pathname = usePathname()
  const { hasAcceptedConsent } = useConsent()

  const sendPageTelemetry = useCallback(() => {
    if (!(IS_PLATFORM && hasAcceptedConsent)) return

    const title = typeof document !== 'undefined' ? document?.title : ''
    const referrer = typeof document !== 'undefined' ? document?.referrer : ''

    unauthedAllowedPost('/platform/telemetry/page', {
      body: {
        pathname,
        page_url: isBrowser ? window.location.href : '',
        page_title: title,
        ph: {
          referrer,
          language: navigator.language ?? 'en-US',
          user_agent: navigator.userAgent,
          search: isBrowser ? window.location.search : '',
          viewport_height: isBrowser ? window.innerHeight : 0,
          viewport_width: isBrowser ? window.innerWidth : 0,
        },
      },
      headers: { Version: '2' },
      credentials: 'include',
    }).catch((e) => {
      console.error('Problem sending telemetry page:', e)
    })
  }, [pathname, hasAcceptedConsent])

  const sendPageLeaveTelemetry = useCallback(() => {
    if (!(IS_PLATFORM && hasAcceptedConsent)) return

    const title = typeof document !== 'undefined' ? document?.title : ''

    unauthedAllowedPost('/platform/telemetry/page-leave', {
      body: {
        pathname,
        page_url: isBrowser ? window.location.href : '',
        page_title: title,
      },
      credentials: 'include',
    }).catch((e) => {
      console.error('Problem sending telemetry page-leave:', e)
    })
  }, [pathname, hasAcceptedConsent])

  return { sendPageTelemetry, sendPageLeaveTelemetry }
}

const PageTelemetry = () => {
  const pathname = usePathname()
  const { sendPageTelemetry, sendPageLeaveTelemetry } = useTelemetryWithConsent()

  useEffect(() => {
    if (pathname) sendPageTelemetry()
  }, [pathname, sendPageTelemetry])

  useEffect(() => {
    if (!pathname) return

    const handleBeforeUnload = () => sendPageLeaveTelemetry()
    window.addEventListener('beforeunload', handleBeforeUnload)
    return () => window.removeEventListener('beforeunload', handleBeforeUnload)
  }, [pathname, sendPageLeaveTelemetry])

  return null
}

export { PageTelemetry }