(.module:
  [lux (#- Name)
   [abstract
    ["." hash (#+ Hash)]]
   [data
    ["." text
     ["%" format (#+ format)]]
    [collection
     ["." list ("#@." monoid)]]]
   [world
    [net
     ["." uri]]]])

(type: #export Group
  Text)

(type: #export Name
  Text)

(type: #export Version
  Text)

(type: #export Artifact
  {#group Group
   #name Name
   #version Version})

(def: #export hash
  (Hash Artifact)
  ($_ hash.product
      text.hash
      text.hash
      text.hash
      ))

(def: group-separator
  ".")

(def: version-separator
  "-")

(def: #export (identity artifact)
  (-> Artifact Text)
  (format (get@ #name artifact)
          ..version-separator
          (get@ #version artifact)))

(def: #export (path artifact)
  (-> Artifact Text)
  (let [directory (format (|> artifact
                              (get@ #group)
                              (text.split-all-with ..group-separator)
                              (text.join-with uri.separator))
                          uri.separator
                          (get@ #name artifact)
                          uri.separator
                          (get@ #version artifact))]
    (format directory
            uri.separator
            (..identity artifact))))

(def: #export (local artifact)
  (-> Artifact (List Text))
  (list@compose (|> artifact
                    (get@ #group)
                    (text.split-all-with ..group-separator))
                (list (get@ #name artifact)
                      (get@ #version artifact))))