(ns admin
  (:import java.io.File)
  (:require [clojure.contrib.str-utils2 :as s])
  (:use compojure
        email
        scheduled-agent
        utils))

;; Debug Page

(defn exception-to-string [e]
  (let [sw (java.io.StringWriter.)
        pw (java.io.PrintWriter. sw)]
    (.printStackTrace e pw)
    (.toString sw)))

(defn lookup-templates [dir selected]
  (for [f (.listFiles (File. dir))
        :when (and (.isFile f) (.endsWith (.getName f) ".st"))]
    (let [n (s/butlast (.getName f) 3)]
      {"template" n
       "selected" (= selected n)})))

(defn debug-page [session flash]
  (if-vip
   (let [st (fetch-template "debug" session)]
     (.setAttribute st "flash" (:msg flash))
     (.setAttribute st "mailtemps" (lookup-templates "template/mail" "welcome"))
     (.toString st))))

(defn debug-commmand! [session params]
  (if-vip
   (let [action (:action params)
         msg (try 
              (cond (= action "regemail")
                    (do (send-registration-email (params :nick) (params :to) (params :template))
                        (str "Sent registration mail to " (params :to)))
                    :else (str "Unknown action: " action))
              (catch Exception e 
                (str "<h2 color=\"red\">Caught Exception in " action " --"
                     (.getMessage e)
                     "</h2><br><pre>" 
                     (exception-to-string e)
                     "</pre>")))]
     [(flash-assoc :msg msg)
      (redirect-to "/debug")])))

;; Muting

(def *mute-refresh-period-sec* 60)

(def fetch-mutes-query "
SELECT *, set_on + duration AS expiry
FROM   mutes
WHERE  (set_on + duration) < now()
AND NOT is_canceled
")

(defn update-mutes []
  (let [res (do-select [fetch-mutes-query])]
    (zipmap (map :user_id res) res)))

(def *active-mutes* 
     (scheduled-agent (no-args-adaptor update-mutes)
                      *mute-refresh-period-sec*
                      nil))

(defn mute-status [session]
  (if-vip
   (println session)))

(defn parse-pos-interval [time unit]
  (let [t (maybe-parse-int time 0)
        u (lower-case unit)]
    (and (> t 0)
         (#{"minute" "hour" "day"} u)
         (str time " " u))))

(defn mute! [session params]
  (if-vip
   (let [nick (params :nick)
         user-id (:user_id (fetch-nick nick))
         duration (parse-pos-interval (params :time) (s/butlast (params :unit) 1))
         reason (params :reason)
         admin-id (session :user_id)]
     (cond (not user-id) [400 "INVALID_NICK"]
           (not duration) [400 "INVALID_DURATION"]
           ;; TODO: Ugly interval hack, w/ no escaping. Totally unsafe.
           :else (let [q (format "INSERT INTO mutes (user_id, admin_id, duration, reason) 
                                       VALUES (%s, %s, '%s', '%s')"
                                 user-id admin-id duration reason)]
                   (and (do-cmds q) "OK"))))))