(defpackage aoc
  (:use :cl)
  (:export
   #:split-lines
   #:test-input
   #:clear-data-cache))

(in-package :aoc)

(defun load-ql-dependencies ()
  ())


(defvar *aoc-url* "https://adventofcode.com")


(defvar *cookie-jar*
  (cl-cookie:make-cookie-jar
   :cookies (list
             (cl-cookie:make-cookie
              :name "session"
              :value (uiop:getenv "AOC_SESSION")
              :origin-host "adventofcode.com"
              :path "/"
              :domain ".adventofcode.com"
              :secure-p t))))

(setf *cookie-jar*
      (cl-cookie:make-cookie-jar
       :cookies (list
                 (cl-cookie:make-cookie
                  :name "session"
                  :value (uiop:getenv "AOC_SESSION")
                  :origin-host "adventofcode.com"
                  :path "/"
                  :domain ".adventofcode.com"
                  :secure-p t))))


(defun split-lines (s)
  (cl-ppcre:split "\\n" s))


(defun fetch-input-data (year day)
  (let ((url (format nil "~A/~D/day/~D/input" *aoc-url* year day)))
    (multiple-value-bind
	  (body)
	(dex:get url :cookie-jar *cookie-jar* :verbose t)
      (split-lines body))))


(defvar *input-data-cache* (make-hash-table))

(defun clear-data-cache ()
  (setf *input-data-cache* (make-hash-table)))

(defun test-input (year day)
  "Return input data for the given challenge. Use a cached value if already fetched"
  (let* ((key (+  (* year 100) day))
	 (val (gethash key *input-data-cache*)))
    (if val
	val
	(setf (gethash key *input-data-cache*) (fetch-input-data year day)))))