;;;; vampire.lisp

(in-package #:vampire)

;;; SYSTEM CONFIG COMPONENT

(defvar *config* nil)

(defclass/std config ()
  ((datastore-directory :ir :std #P"/srv/parasite/store/")
   (static-directory :ir :std #P"/srv/parasite/static/")
   (port :ir :std 4919)
   (downloader-threads :ir :std 5)))

(defun config-from-file (path)
  "PATH should be a path to a file containing a PLIST suitable for
   passing as the keyword arguments to (MAKE-INSTANCE 'CONFIG ...)"
  (apply #'make-instance 'config (read-from-file path)))

;;; RESOURCE MODEL

(defclass/bknr user (keyed)
  ((name :with :std "")
   (playlists :with :std (list))
   (pw pwhash :with)))

;;; TRANSACTIONS

(defun new-user (&key name)
  (with-transaction ()
    (make-instance 'user :name name)))

;;; CLIENT

(defparameter +user-key+ "vampire.userkey")

(defun user-key (window)
  (jonathan:parse (storage-element window :local +user-key+)))

(defun (setf user-key) (val window)
  (setf (storage-element window :local +user-key+) (jonathan:to-json val)))

(defun session-user (clog-obj)
  (object-with-key (user-key (window (connection-body clog-obj)))))

(defun create-new-playlist-form (parent &rest args)
  (declare (ignorable args))
  (with-clog-create parent
      (div ()
           (section (:h2 :content "Create New Playlist"))
           (label (:content "Playlist Title:"))
           (form-element (:text :bind pl-title))
           (button (:content "Create" :bind btn)))
    (set-on-click
     btn
     (alambda
       (new-playlist (session-user parent) :title (value pl-title))
       (reload (location (connection-body parent)))))))

(defun url-to-playlist (pl location)
  (format nil "~a//~a/playlist/~a"
          (protocol location)
          (host location)
          (key pl)))

(defun create-playlist-listing (parent &rest args)
  (declare (ignorable args))
  (dolist (pl (user-playlists (session-user parent)))
    (let ((url
            (url-to-playlist pl (location (connection-body parent)))))
      (with-clog-create parent
          (div ()
               (section (:h4)
                        (a (:link url :content (playlist-title pl) :bind pl-link))))
        (set-on-click
         pl-link
         (alambda
           (setf (url (location (connection-body parent)))
                 url)))))))






;; (defun create-track-form (parent playlist &rest args)
;;   (declare (ignorable args))
;;   (with-clog-create parent
;;       (div ()
;;            (section (:h3 :content "Add Track"))
;;            (label (:content "Paste URL: " :bind url-label))
;;            (form-element (:text :bind url-input))
;;            (button (:content "Fetch Track" :bind submit-button))
;;            (div (:bind notice-area)))
;;     (label-for url-label url-input)
;;     (setf (place-holder url-input) "https://www.youtube.com/watch?v=dQw4w9WgXcQ")
;;     (set-on-click
;;      submit-button
;;      (alambda
;;          (let* ((url
;;                   (value url-input))
;;                 (notice
;;                   (create-p notice-area :content (format nil "... Fetching ~a" url))))
;;            (setf (value url-input) "")
;;            (add-fetch-track-job
;;             url
;;             (lambda (track)
;;               (remove-from-dom notice)
;;               (append-track playlist track)
;;               (add-track-to-listing parent track))
;;             (lambda (err)
;;               (remove-from-dom notice)
;;               (format t "Error: ~a~%" err)
;;               (alert (window (connection-body parent))
;;                      (format nil "Error while fetching track at: ~a~%"
;;                              url)))))))))



(defun user-page (body)
  (if-let (user (session-user body)) 
    (with-clog-create body
        (div ()
             (p (:content (format nil "Welcome ~a" (user-name user))))
             (new-playlist-form ())
             (playlist-listing ())))
    (setf (url (location body)) "/")))

(defun login-page (body)
  (with-clog-create body
      (div ()
           (p (:content "LOGIN"))
           (form-element (:text :bind name))
           (button (:bind btn :content "Click here to log in")))
    (set-on-click
     btn
     (lambda (obj)
       (declare (ignore obj))
       (let ((u (new-user :name (value name))))
         (setf (user-key (window body)) (key u))
         (setf (url (location body)) "/"))))))

(defun main (body)
  (if (session-user body)
      (setf (url (location body)) "/user")
      (setf (url (location body)) "/login")))

;;; STARTUP

(defun initialize-database (config)
  (ensure-directories-exist (datastore-directory config))
  (make-instance
   'bknr.datastore:mp-store
   :directory (datastore-directory config)
   :subsystems (list (make-instance 'bknr.datastore:store-object-subsystem))))

(defun start (config)
  (setf *config* config)
  (initialize-database config )
  (start-downloader-service config)
  (initialize 'main
              :extended-routing t
              :static-root (static-directory config))
  (set-on-new-window 'user-page :path "/user")
  (set-on-new-window 'login-page :path "/login")
  (set-on-new-window 'playlist-page :path "/playlist")
  (open-browser))

(defun hacking-start ()
  (start (make-instance
          'config
          :static-directory (merge-pathnames "vampire-static/" (user-homedir-pathname))
          :datastore-directory (merge-pathnames "vampire-store/" (user-homedir-pathname)))))