(in-package #:photo-store)

(eval-when (:compile-toplevel :load-toplevel :execute)
  (restas::register-pkgmodule-traits 'photo-store)
  (restas:reconnect-all-routes))


;; photos: id | album_id | filename | size | taken | width | height | lat | lon
;; albums: id | parent_id | path | date | name | description | cover_id | accessibility

(defstruct photo url title width height)


(defun load-photo (path)
  (let ((info (load-photo-info path)))
    (make-photo :url (map-path path)
                :title (aget :name info)
                :width (first (aget :dim info))
                :height (second (aget :dim info)))))

(defun load-photos-from-dir (directory)
  (mapcar 'load-photo (remove-if-not #'(lambda (p)
                                         (equal (string-downcase (pathname-type p)) "jpg"))
                                     (uiop:directory-files directory))))

(defvar *path-url-mapping* nil "alist of path-2-url mapping")
(defun map-path (path)
  (loop for (base-path . base-url) in *path-url-mapping*
     for rel-path = (uiop:subpathp path base-path)
     when rel-path do (return (concatenate 'string base-url (namestring rel-path)))
     finally (error "Can't map path ~S" path)))

(defmethod yason:encode ((photo photo) &optional (stream *standard-output*))
  (yason:with-output (stream)
    (yason:with-object ()
      (yason:encode-object-element "src" (photo-url photo))
      (yason:encode-object-element "w" (photo-width photo))
      (yason:encode-object-element "h" (photo-height photo))
      (yason:encode-object-element "title" (photo-title photo)))))

(restas:define-route main ("")
  (asdf:system-relative-pathname :photo-store "index.html"))

;; Assets file path
(defparameter *assets-path*
  (asdf:system-relative-pathname :photo-store "assets/"))

(restas:define-route assets/css ("css/:file" :content-type "text/css")  
  (merge-pathnames file *assets-path*))

(restas:define-route assets/js ("js/:file" :content-type "application/x-javascript")
  (merge-pathnames file *assets-path*))


(defvar *incoming-path* nil "Path for incoming photos")
(restas:define-route incoming ("incoming/"
                               :content-type "application/json")
  (with-output-to-string (stream)
    (yason:encode
     (loop for subdir in (uiop:subdirectories *incoming-path*)
        append (load-photos-from-dir subdir))
     stream)))

(defun start (&key (address "0.0.0.0") (port 8800))
  (restas:start '#:photo-store :address address :port port))