import { joinURL } from 'ufo'

const UNPKG_API = 'https://unpkg.com'
const ALIYUN_API = 'https://registry.npmmirror.com'

export type CDN = 'aliyun' | 'unpkg'
export interface CdnApi {
  path: string
  pkg: string
  proxy?: CDN
  version?: string
}

export function genCdnUrl({
  pkg,
  version = 'latest',
  path,
  proxy,
}: CdnApi): string {
  switch (proxy) {
    case 'unpkg': {
      return joinURL(UNPKG_API, `${pkg}@${version}`, path)
    }
    default: {
      return joinURL(ALIYUN_API, pkg, version, 'files', path)
    }
  }
}