import { Config } from 'config.types'
import ExternalApi from 'lib/external-api'

type ExternalApiArgs = (_config: Partial<Config>) => Partial<Config> | boolean

export default function initializeExternalApi(
  appConfig: Partial<Config> | ExternalApiArgs,
): void {
  if (window.seamly && !Array.isArray(window.seamly)) {
    throw new Error(
      'Seamly UI has already been initialised. Use the window.seamly object to start new instances instead.',
    )
  }
  const seamlyActions = Array.isArray(window.seamly) ? window.seamly : []
  const seamly = new ExternalApi(appConfig)
  // @ts-ignore
  window.seamly = { push: seamly.push.bind(seamly) }

  seamly.push(...seamlyActions)
}