import { NgModuleRef, ApplicationRef } from '@angular/core'
import { createNewHosts } from '@angularclass/hmr'

export const hmrBootstrap = (module: any, bootstrap: () => Promise<NgModuleRef<any>>) => {
  let ngModule: NgModuleRef<any>
  module.hot.accept()
  bootstrap()
    .then(mod => ngModule = mod)
  module.hot.dispose(() => {
    const appRef: ApplicationRef = ngModule.injector.get(ApplicationRef)
    const elements = appRef.components.map(c => c.location.nativeElement)
    const makeVisible = createNewHosts(elements)
    ngModule.destroy()
    makeVisible()
  })
}