;;;; seanut.lisp

(in-package #:seanut)

(defun prompt-and-download (domain auth root opts &optional assume-yes)
  "prompt the user with y-or-n-p and download ITEM"
  (labels ((fetch-user-id ()
             (gethash "Id" (json-request (format-url domain "Users/Me")
                                         :auth auth)))

           (generate-filename (item)
             (make-pathname :name
                            (str:replace-all "/" "-"
                                             (format nil "~A.~A"
                                                     (gethash "Name" item)
                                                     (if (string= (gethash "Type" item) "Season")
                                                         (subseq (gethash "Container" item) 0
                                                                 (search "," (gethash "Container" item)))
                                                         (pathname-type (gethash "Path" item)))))))
           
           (generate-root-name (&optional add-trailing)
             (format nil "~A (~A)~@[ Season ~A~]~@[/~]"
                     (gethash "Name" root)
                     (gethash "ProductionYear" root)
                     (getf opts :season-number)
                     add-trailing))
           
           (create-directory (dir)
             (ensure-directories-exist (uiop:ensure-directory-pathname (make-pathname :name dir))))
           
           (download-item-or-children (item)
             ;; PARENTS is a list of all parent names with FIRST being 
             ;; the oldest grandparent (for building complete download path)
             (let ((children (gethash "Items"
                                      (if (string= (gethash "Type" item) "Season")
                                          (json-request (format-url domain "Shows/~A/Episodes?fields=Path&seasonId=~A~@[&season=~A~]"
                                                                    (gethash "SeriesId" item)
                                                                    (gethash "Id" item)
                                                                    (getf opts :season-number))
                                                        :auth auth)
                                          (json-request (format-url domain "Items?userId=~A&fields=Path,ChildCount&parentId=~A"
                                                                    (fetch-user-id)
                                                                    (gethash "Id" item))
                                                        :auth auth)))))
               ;; DELETE: debug prints lmao
               (loop :for child :across children
                     :do (format t "Name: ~A, Id: ~A~%"
                                 (gethash "Name" child)
                                 (gethash "Id" child)))
               
               
               (loop :for child :across children
                     :if (zerop (gethash "ChildCount" child 0))
                       :do 
                          ;; download single file
                          (download-media (generate-filename child)
                                          (format-url domain "Items/~A/Download"
                                                      (gethash "Id" child))
                                          auth)

                     :else
                       :do 
                          ;; 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
                          (format t "Creating child directory in ~A and recursing: ~A~%"
                                  (uiop:getcwd) (gethash "Name" child))
                          (uiop:with-current-directory ((create-directory (gethash "Name" child)))
                            (download-item-or-children child))))))
    
    (format t "Name: ~A, Id: ~A~%"
            (gethash "Name" root)
            (gethash "Id" root))
    (when (or assume-yes
              (y-or-n-p "Download ~A" (generate-root-name)))

      ;; CD into our output directory
      (uiop:with-current-directory ((getf opts :output #P"./"))
        (let ((grandest-parent (format nil "~A (~A)~@[ Season ~A~]/"
                                       (gethash "Name" root)
                                       (gethash "ProductionYear" root)
                                       (getf opts :season-number))))

          ;; create our folder for our current download
          (ensure-directories-exist grandest-parent)

          ;; CD into it, then download the files
          (uiop:with-current-directory (grandest-parent)
            (download-item-or-children root)))))))


(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 (and (getf opts :token) (generate-authorization (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
             ;;
             ;; after reading more 
             (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))))