import { isPromise } from './is'

export type Interceptor = (...args: any[]) => Promise<boolean> | boolean | undefined | void

export function funInterceptor(interceptor: Interceptor | undefined, {
  args = [],
  done,
  canceled,
}: {
  args?: unknown[]
  done: (val?: any) => void
  canceled?: () => void
}) {
  if (interceptor) {
    const returnVal = interceptor(null, ...args)

    if (isPromise(returnVal)) {
      returnVal
        .then((value) => {
          if (value)
            done(value)
          else if (canceled)
            canceled()
        })
        .catch(() => {})
    }
    else if (returnVal) {
      done()
    }
    else if (canceled) {
      canceled()
    }
  }
  else {
    done()
  }
}