(ns org.domaindrivenarchitecture.activity-pub-poc.activitystreams2-legacy
  (:require [clojure.spec.alpha :as s]
            [org.domaindrivenarchitecture.activity-pub-poc.owl :as owl]
            [org.domaindrivenarchitecture.activity-pub-poc.core :as core]))

; TODO: We could do these with multispec, but that is too much for a POC
(def objectAndLinkTypes #{; Object Types
                          "Article"
                          "Audio"
                          "Collection"
                          "Document"
                          "Event"
                          "Image"
                          "Note"
                          "Object"
                          "OrderedCollection"
                          "Page"
                          "Place"
                          "Profile"
                          "Relationship"
                          "Tombstone"
                          "Video"
                          "Link"
                         ; Link Types
                          "Mention"})

(defn match-type
  [type]
  #(= (:type %) type))

(s/def ::Object (s/or
                 :uri core/uri-string?
                 :map (s/and (s/keys
                              :req-un [::id ::type]
                              :opt-un [::attributedTo ::und-mehr])
                                 (match-type "Object"))))

;http://www.w3.org/ns/activitystreams#id
;TODO: how do we translate this? rdfs:domain [a owl:Class ;    owl:unionOf (as:Link as:Object)]
;TODO evtl sind ::owl/FunctionalProperty, ::owl/DatatypeProperty, ::owl/DeprecatedProperty nur meta informationen?
(s/def ::id (s/and ::owl/FunctionalProperty
                   ::owl/DatatypeProperty
                   ::owl/DeprecatedProperty
                   core/uri-string?))

;TODO: we will need such a predicate ...
;(defn-spec isFunctional? bool?
;  [spec keyword?]
;  (search-in-meta spec))

; TODO: type can have multiple values!! Affects also the fct match-type and all specs that uses it!
(s/def ::type #(or (core/uri-string? %) (contains? objectAndLinkTypes %)))

(s/def ::Link (s/and (s/keys
                      :req-un [::type]
                      :opt-un [::attributedTo ::und-mehr])
                     (match-type "Link")))

(s/def ::Relationship (s/keys :req-un [::object ::und-mehr]))

; #### Collection ####
(s/def ::Collection (s/and ::Object
                           (s/keys
                            :opt-un [::totalItems ::current ::first ::last ; FUNCTIONAL properties!
                                     ::items]) ;"items" is not a FUNCTIONAL property!
                           (match-type "Collection")))
; Side note: A property marked as FUNCTIONAL does not mean that this property is required for the respective Object.
;   Example: The property "replies" is FUNCTIONAL for "Object" but is an optional property for "Object".

(s/def ::OrderedCollection (s/and ::Collection
                                  (match-type "OrderedCollection")))

; #### NOTE ####
; Specialities of mastodon statuses: https://docs.joinmastodon.org/spec/activitypub/#status
(s/def ::Note (s/and ::Object
                     ;(match-type "Note")
                     (s/keys
                      :opt-un [::likes])))

(s/def ::likes (s/or :collection ::Collection
                     :ordered-collection ::OrderedCollection))

; #### ACTIVITY ####
(s/def ::Activity (s/and
                   ::Object
                   (s/keys
                    :req-un [::actor ::object]
                    :opt-un [::result ::target ::origin ::instrument
                             ::verb])))
; "IntransitiveActivity" erbt von Activity, aber ohne ::object

(s/def ::Property (s/or :object ::Object
                        :link ::Link
                        :collection (s/coll-of (s/or :object ::Object :link ::Link))))

(s/def ::attributedTo ::Property)
(s/def ::actor ::attributedTo)

(s/def ::object
  ::Property)

(s/def ::result
  ::Property)

(s/def ::target
  ::Property)

(s/def ::origin
  ::Property)

(s/def ::instrument
  ::Property)

(s/def ::verb core/uri-string?)

; #### LIKE ####
(s/def ::Like (s/and ::Activity
                     (match-type "Like")))

; Was beim Type Activity optional und required ist, ist abhängig vom Aktivitätstyp.
; Bspw brauch ein Like einen actor und den type "Like" und (xor) target/object.
; Aber die "IntransitiveActivity" (die alles von Activity erbt außer "object") vom Type "Question" besitzt keinen "actor".

(def maybeLike?
  {:id "https://social.bla/alyssa#likes/RANDOMHASH",
   :type "Like",
   :actor "https://social.bla/alyssa",
   :object "https://chatty.bla/ben/posts/234s23-2g34234-2hhj536"})

(def testLink
  {:context "https://www.w3.org/ns/activitystreams",
   :type "Link",
   :href "http://example.org/abc",
   :hreflang "en",
   :mediaType "text/html",
   :name "An example link"})

(def testObject
  {:context "https://www.w3.org/ns/activitystreams",
   :type "Note",
   :id "https://social.bla/alyssa",
   :href "http://example.org/abc",
   :hreflang "en",
   :mediaType "text/html",
   :name "An example object"})