import { getGaMeasurementId } from '../config/site.js'

export function initAnalytics() {
  const measurementId = getGaMeasurementId()
  if (!measurementId) return

  window.dataLayer = window.dataLayer || []
  window.gtag = function gtag() {
    window.dataLayer.push(arguments)
  }
  window.gtag('js', new Date())
  window.gtag('config', measurementId)

  const script = document.createElement('script')
  script.async = true
  script.src = `https://www.googletagmanager.com/gtag/js?id=${encodeURIComponent(measurementId)}`
  document.head.appendChild(script)
}