;;;; seanut.lisp

(in-package #:seanut)

(defun prompt-and-download (domain auth item opts &optional assume-yes)
  "prompt the user with y-or-n-p and download ITEM"
  ;; debug print statements lol
  (format t "~A~%" auth)
  (y-or-n-p)

  
  (labels ((generate-root-name (&optional add-trailing)
             (format nil "~A (~A)~@[ Season ~A~]~@[/~]"
                     (gethash "Name" item)
                     (gethash "ProductionYear" item)
                     (getf opts :season-number)
                     add-trailing))
           
           (ensure-download-dir (&optional new-path)
             (ensure-directories-exist
              (merge-pathnames (or new-path "")
                               (merge-pathnames (generate-root-name 'add-slash)
                                                (getf opts :output #P"./")))))
           
           (download-item-or-children (item &optional parents)
             ;; PARENTS is a list of all parent names with FIRST being 
             ;; the oldest grandparent (for building complete download path)
             (let ((children (if (string= (gethash "Type" item) "Season")
                                 (json-request (format-url domain "Shows/~A/Episodes?fields=Path~@[&season=~A~]"
                                                           (gethash "Id" item)
                                                           (getf opts :season-number))
                                               auth)
                                 (json-request (format-url domain "Items?fields=Path&parentId=~A"
                                                           (gethash "Id" item))
                                               auth))))
               (if (zerop (length children))
                   ;; download single file
                   ;; to get the extension type i think we may need to include
                   ;; "Path" field in the api request, then use that to get the extension
                   (download-media (format nil "~A~A~{~A~^/~}~A.~A"
                                           (getf opts :output #P"./")
                                           (generate-root-name 'trailing)
                                           parents (gethash "Name" item)
                                           (pathname-type (gethash "Path" item)))
                                   (format-url domain "Items/~A/Download"
                                               (gethash "Id" item))
                                   auth)

                   ;; if the item has children we need to download them.
                   ;; to accomplish this we get the list of children
                   ;; and loop over them, recursing for each one
                   ;; ensure that a directory exists for Parent
                   ;; then recurse with children
                   (progn
                     (ensure-download-dir (format nil "~A~A~{~A/~}~A"
                                                  (getf opts :output #P"./")
                                                  (generate-root-name 'trailing)
                                                  parents (gethash "Name" item)))
                     (loop :for child :in children
                           :do (apply #'download-item-or-children
                                      `(,child (,@parents ,(gethash "Name" item))))))))))
    (when (or assume-yes
              (y-or-n-p "Download ~A" (generate-root-name)))
      (ensure-download-dir)
      (download-item-or-children item))))


(defun main ()
  "binary entry point"
  (handle-user-abort
   (multiple-value-bind (opts args) (get-opts)
     (when (or (getf opts :help)
               (and (every #'null args)
                    (every #'null opts)))
       (opts:describe :usage-of "seanut"
                      :args "DOMAIN MEDIA-NAME")
       (uiop:quit 0))
     
     (when (getf opts :version)
       (quit-with-message 0 "seanut v~A" (seanut-version)))

     (unless (or (and (getf opts :username)
                      (getf opts :password))
                 (getf opts :quick-connect-p)
                 (getf opts :token))
       (quit-with-message 1 "please provide an access token, username & password, or use quick connect"))

     (unless (getf opts :media-type)
       (quit-with-message 1 "Please specify media type to download.~%~A ~{~A~^, ~}"
                          "Supported media types are:"
                          *valid-media-types*))
     
     (when (some #'null args)
       (quit-with-message 1 "domain and/or media name not provided"))

     (destructuring-bind (domain search-term) args
       (let* ((authorization (or (getf opts :token)
                                 (generate-authorization (get-access-token domain opts))))
              (results (run-search-query domain authorization
                                         (getf opts :media-type)
                                         (url-encode search-term))))
         (if (< 0 (length results))
             ;; FIXME: for some reason this access token is not "valid" enough to get
             ;;        certain info? when we run the parentID search it craps out on us?
             ;; maybe its not something wrong with the token, but the auth string as a
             ;; whole? look into this more tomorrow
             (loop :for item :across results
                   :do (prompt-and-download domain authorization
                                            item (getf opts :assume-yes)))
             (quit-with-message 0 "No results found for ~A" search-term)))))
   
   (error (e)
     (quit-with-message 1 "encountered error: ~A" e))))