import _ from 'lodash'

export default (s3Response, prefix, service, stage) => {
  if (s3Response.Contents.length) {
    const regex = new RegExp(`${prefix}/${service}/${stage}/(.+-.+-.+-.+)/(.+)`)
    const s3Objects = s3Response.Contents.filter((s3Object) =>
      s3Object.Key.match(regex),
    )
    const names = s3Objects.map((s3Object) => {
      const match = s3Object.Key.match(regex)
      return {
        directory: match[1],
        file: match[2],
      }
    })
    const grouped = _.groupBy(names, 'directory')
    return Object.values(grouped)
  }
  return []
}