const SCRIPT_ID = 'activity-flow-script'
const SCRIPT_URL = 'https://activity-flow.vtex.com/af/bridges/af.js'

let isScriptLoaded = false

/**
 * Loads the Activity Flow script into the document head.
 * This function is idempotent - calling it multiple times will only load the script once.
 */
export function loadActivityFlowScript() {
  if (isScriptLoaded) return

  if (document.getElementById(SCRIPT_ID)) {
    isScriptLoaded = true
    return
  }

  const script = document.createElement('script')
  script.id = SCRIPT_ID
  script.src = SCRIPT_URL
  script.async = true
  document.head.appendChild(script)

  isScriptLoaded = true
}