(ns project.websocket
  (:require
   [taoensso.sente  :as sente]
   [taoensso.encore :as encore]
   [re-frame.core :as rf]))



(defn start-websocket [csrf-token]
  (let [{:keys [chsk ch-recv send-fn state]}
        (sente/make-channel-socket-client! "/chsk" csrf-token {:type :auto})]

    (defonce chsk chsk)
    (defonce ch-chsk ch-recv) ; ChannelSocket's receive channel
    (defonce chsk-send! send-fn) ; ChannelSocket's send API fn
    (defonce chsk-state state)   ; Watchable, read-only atom
    ))



(defmulti -event-msg-handler
  "Multimethod to handle Sente `event-msg`s"
  :id ; Dispatch on event-id
  )


(defn event-msg-handler
  "Wraps `-event-msg-handler` with logging, error catching, etc."
  [{:as ev-msg :keys [id ?data event]}]
  (-event-msg-handler ev-msg))


(defmethod -event-msg-handler
  :default ; Default/fallback case (no other matching handler)
  [{:as ev-msg :keys [event]}]
  (println "Unhandled event: %s" event))


(defmethod -event-msg-handler :chsk/state
  [{:as ev-msg :keys [?data]}]
  (let [[old-state-map new-state-map] (encore/have vector? ?data)]
    (if (:first-open? new-state-map)
      (println "Channel socket successfully established!: %s" new-state-map)
      (println "Channel socket state change: %s"  new-state-map))))


(defmethod -event-msg-handler :chsk/recv
  [{:as ev-msg :keys [?data]}]
  (let [[event msg] ?data
        _ (println "EVENT >>: " event " msg: " msg)]
    (if (= event :chsk/ws-ping)
      (println "Keep Alive")
      (println "here comes eveeent: " event)
      ;; (rf/dispatch [event (:coords msg)])
      )))


(defmethod -event-msg-handler :chsk/handshake
  [{:as ev-msg :keys [?data]}]
  (let [[?uid ?csrf-token ?handshake-data] ?data]
    (println "Handshake: %s" ?data)))


(defn abc []
  (chsk-send! [:test/first {:data (str "abc!!")}]))



(defn start-ws []
  (start-websocket "KgR8xgDnI71Q9EPSL47o1BRiV+YkD++cgGLZpy61wxgEkPAcvH16k3SMeE2ubCeLHuhhfFNzFEuEsfMs")
  (sente/start-client-chsk-router! ch-chsk event-msg-handler))