import posthog from 'posthog-js'

const POSTHOG_KEY = process.env.NEXT_PUBLIC_POSTHOG_KEY
const POSTHOG_HOST = process.env.NEXT_PUBLIC_POSTHOG_HOST ?? 'https://eu.i.posthog.com'
const COOKIE_CONSENT_KEY = 'innungsapp_cookie_consent'
const COOKIE_CONSENT_EVENT = 'innungsapp:cookie-consent-granted'

declare global {
  interface Window {
    __innungsappPosthogInitialized?: boolean
  }
}

export function initPosthog() {
  if (typeof window === 'undefined' || !POSTHOG_KEY) return false
  if (window.__innungsappPosthogInitialized) return true

  posthog.init(POSTHOG_KEY, {
    api_host: POSTHOG_HOST,
    defaults: '2026-01-30',
    capture_pageview: false,
    respect_dnt: true,
  })

  window.__innungsappPosthogInitialized = true
  return true
}

if (typeof window !== 'undefined' && POSTHOG_KEY) {
  const consent = window.localStorage.getItem(COOKIE_CONSENT_KEY)
  if (consent === 'accepted') {
    initPosthog()
  }

  window.addEventListener(COOKIE_CONSENT_EVENT, initPosthog)
}