(ns cljdoc.pathom3
  (:require [com.wsscode.pathom.core :as p]
            [com.wsscode.pathom.connect :as pc]
            [clojure.core.async :as async]
            [clojure.set]
            [cljdoc.util.repositories :as repos]
            [cljdoc.util.pom :as pom]
            [cljdoc.config :as config]
            [cljdoc.storage.sqlite-impl :as cljdoc-sqlite]))

;; {::pc/sym     `some-resolver ; this is important! we need to name each resolver, prefer qualified symbols
;;  ::pc/input   #{:customer/id}
;;  ::pc/output  [:customer/id :customer/name :customer/email]
;;  ::pc/resolve (fn [env input] ...)}

(def +db+ (config/db (config/config)))

(def namespaces-resolver
  {::pc/sym     `namespaces-resolver
   ::pc/input   #{:cljdoc.artifact/sql-id}
   ::pc/output  [:cljdoc.artifact/namespaces]
   ::pc/resolve (fn [env input]
                  {:cljdoc.artifact/namespaces []})})

(def artifact-id-resolver
  {::pc/sym     `artifact-id-resolver
   ::pc/input   #{:cljdoc/artifact}
   ::pc/output  [:cljdoc.artifact/sql-id]
   ::pc/resolve (fn [env {:keys [group name version] :as in}]
                  (println "in reader:" in)
                  (try (#'cljdoc-sqlite/get-version-id +db+ group name version)
                       (catch Throwable e
                         (.printStacktrace e)))
                  (println in (#'cljdoc-sqlite/get-version-id +db+ group name version))
                  {:cljdoc.artifact/sql-id (#'cljdoc-sqlite/get-version-id +db+ group name version)})})

(defmulti resolver-fn pc/resolver-dispatch)

(def indexes (atom {}))
(def defresolver (pc/resolver-factory resolver-fn indexes))

(def reg-config {::pc/defresolver defresolver})

; register the resolver we created previously
(pc/register reg-config [namespaces-resolver artifact-id-resolver])

;; Create a parser that uses the resolvers:
(def parser (p/parallel-parser {::p/env (fn [env]
                                          (merge
                                           {::p/reader               [p/map-reader
                                                                      pc/parallel-reader
                                                                      pc/open-ident-reader
                                                                      p/env-placeholder-reader]
                                            ::p/placeholder-prefixes #{">"}
                                            ::pc/resolver-dispatch   resolver-fn
                                            ::pc/indexes             @indexes}
                                           env))
                                #_{::p/reader [p/map-reader
                                                     pc/parallel-reader
                                                     pc/open-ident-reader
                                                     p/env-placeholder-reader]
                                         ::p/placeholder-prefixes #{">"}
                                         ::pc/resolver-dispatch resolver-fn
                                         ::pc/indexes-fn        #(deref indexes)}}))

(comment
  (def a {:group "compojure" :name "compojure" :version "1.6.1"})

   (let [{:keys [group name version]} a]
     (println (#'cljdoc-sqlite/get-version-id +db+ group name version))
     {:cljdoc.artifact/sql-id (#'cljdoc-sqlite/get-version-id +db+ group name version)})

  (async/<!!
   (parser {} [{[:cljdoc/artifact {:group "compojure" :name "compojure" :version "1.6.1"}]
                [:cljdoc.artifact/sql-id]}]))

  (def artifact #:artifact{:group "org.martinklepsch" :name "derivatives" :version "0.3.0"})

  (cljdoc-parser {::p/entity artifact
                  :db (config/db (config/config))}
                 '[:artifact/pom-url
                   :artifact/sql-id
                   {:artifact/dependencies [* :artifact/sql-id]}])

  )