(in-package :cl-user)
(defpackage chatikbot.plugins.aoc
  (:use :cl :chatikbot.common))
(in-package :chatikbot.plugins.aoc)

(defparameter +api-uri+ "https://adventofcode.com/2020/leaderboard/private/view/24158.json")
(defparameter +leader-board-link+ "https://adventofcode.com/2020/leaderboard/private/view/24158")
(defparameter +advent-time+ (encode-universal-time 0 0 8 25 12 2020 3))

(defmethod poller-request ((module (eql :aoc)) method &rest params)
  (declare (ignorable params))
  (let ((cookie (format nil "session=~a" *poller-token*)))
    (handler-case
        (agets (json-request +api-uri+ :headers `((:cookie . ,cookie))))
      (dex:http-request-failed (e) e))))

(defmethod poller-validate ((module (eql :aoc)) response)
  (not (typep response 'dex:http-request-failed)))

(defmethod poller-get-token ((module (eql :aoc)) secret)
  (let* ((*poller-token* secret))
    (poller-request :aoc "")
    (format nil "~a" secret)))

(defun leaderboard ()
  (poller-call :aoc ""))

(defun get-advent-days-active ()
  (max 0 (min 25 (- 25 (ceiling (/ (- +advent-time+ (get-universal-time)) 86400))))))

(defun format-stars(completions)
  (format nil "~{~a~^ ~}" (loop for daynum from 1 to (get-advent-days-active)
                            collect (cond ((= 1 (length (agets completions (write-to-string daynum)))) "☆")
                                      ((= 2 (length (agets completions (write-to-string daynum)))) "★")
                                      (:otherwise "•")))))

(defun format-leaderboard (json)
  (let ((sorted (sort (loop for (uid . member) in (agets json "members")
                         collect (list (agets member "name") (agets member "local_score") (format-stars (agets member "completion_day_level"))))
                      #'> :key #'second)))
    (format nil "🏆***Chad AoC Leaderboard***🏆~%~a~%~%~{~a. ~a: ~a ~% ~a~^~%~}" +leader-board-link+
            (apply 'append (mapcar #'cons (alexandria:iota (length sorted) :start 1) sorted)))))

(defun handle-leaderboard ()
  (bot-send-message
   (handler-case
       (format-leaderboard (leaderboard))
     (poller-error ()
       "Надо обновить куки, старые истекли"))
   :parse-mode "markdown"))

(defun handle-set-cookie (cookie)
  (handler-case (progn
                  (poller-authenticate :aoc cookie)
                  (bot-send-message "Кука рабочая, теперь можешь делать запросы."))
    (poller-cant-authenticate ()
      (bot-send-message "Чот не смог, пропробуй другие."))))

(def-message-cmd-handler handle-cmd-aoc (:aoc)
  (cond
    ((= 1 (length *args*))
     (handle-set-cookie (car *args*)))
    (:otherwise (handle-leaderboard))))