;;;; Function-only upgrade; never performs a transfer on the user's desk.
(in-package #:cl-user)

(defun lime-head-send-definitions ()
  ;; Export before reading X11 source so its inherited core symbol resolves
  ;; correctly in a runtime that has not loaded the new package definition.
  (export 'lime.core::move-client-to-presentation :lime.core)
  (let ((manifest
          '((:lime.core "src/membership.lisp"
             "%MOVE-CLIENT-MEMBERSHIP" "MOVE-CLIENT-TO-ACTIVITY" "MOVE-CLIENT-TO-PRESENTATION")
            (:lime.x11 "src/x11/commands.lisp"
             "BACKEND-TRANSFER-FOCUSED-CLIENT-TO-HEAD" "BACKEND-REHOME-CLIENT-TO-HEAD")
            (:lime.x11 "src/x11/ui.lisp"
             "%UI-SEND-CONTEXT-VALID-P" "%UI-REQUEST-CLIENT-SEND"
             "BACKEND-SEND-FOCUSED-CLIENT-TO-HEAD" "BACKEND-SEND-FOCUSED-CLIENT-RELATIVELY"
             "%UI-KEY-PATH")
            (:lime.x11 "src/x11/default-bindings.lisp" "INSTALL-DEFAULT-KEYBINDINGS")))
        (definitions nil))
    (dolist (entry manifest)
      (destructuring-bind (package file &rest names) entry
        (let* ((*package* (find-package package)) (*read-eval* nil)
               (symbols (mapcar (lambda (name) (intern name *package*)) names))
               (found nil))
          (with-open-file (in (merge-pathnames file #p"/home/adan/code/common-lisp/lime/"))
            (loop for form = (read in nil :eof) until (eq form :eof)
                  when (and (consp form) (eq (first form) 'defun) (member (second form) symbols))
                    do (push form found)))
          (assert (= (length symbols) (length found)))
          (dolist (symbol symbols) (assert (find symbol found :key #'second)))
          (setf definitions (append definitions
                                    (mapcar (lambda (symbol) (find symbol found :key #'second)) symbols))))))
    definitions))

(defun lime-upgrade-live-head-send ()
  (unless (= 1578331 (slynk-backend:getpid)) (error "Unexpected Lime process."))
  (lime.dev:with-development-backend (backend)
    (unless (and (lime.dev::development-session-running-p lime.dev:*development-session*)
                 (not (lime.dev::development-session-paused-p lime.dev:*development-session*)))
      (error "Lime is not running normally."))
    (when (or (lime.x11::x11-backend-pointer-drag backend)
              (lime.x11::x11-backend-ui-session backend))
      (error "Close the menu or finish the drag before upgrading."))
    (let* ((world (lime.x11:x11-backend-world backend))
           (before (lime.persistence:snapshot-world world))
           (command (lime.x11:find-configured-command backend 'send-window-to-next-head))
           (old-detail (lime.x11:lime-command-description command))
           (old-action (lime.x11:lime-command-action command))
           (config (lime.x11::x11-backend-configuration backend))
           (bindings (lime.x11:list-keybindings backend))
           (definitions (lime-head-send-definitions))
           (old-functions
             (mapcar (lambda (form)
                       (let ((name (second form)))
                         (cons name (and (fboundp name) (fdefinition name)))))
                     definitions)))
      (assert (equal "/home/adan/.config/lime/config.lisp"
                     (lime.x11::x11-backend-configuration-source backend)))
      (handler-case
          (progn
            (dolist (definition definitions) (eval definition))
            (export '(lime.x11::backend-rehome-client-to-head
                      lime.x11::backend-send-focused-client-to-head
                      lime.x11::backend-send-focused-client-relatively) :lime.x11)
            ;; Existing binding closures resolve the command by id; no key
            ;; regrabs, provider restarts, or session/config reload necessary.
            (setf (lime.x11:lime-command-description command)
                  "Send to next monitor; confirm if its Activity changes"
                  (lime.x11:lime-command-action command)
                  (lambda (backend) (lime.x11::backend-send-focused-client-relatively backend :next)))
            (assert (equalp before (lime.persistence:snapshot-world world)))
            (assert (eq config (lime.x11::x11-backend-configuration backend)))
            (assert (equal bindings (lime.x11:list-keybindings backend)))
            (assert (lime.core:validate-world world))
            (list :upgraded t :world-unchanged t :bindings-unchanged t
                  :function-count (length definitions)
                  :command (lime.x11:lime-command-label command)))
        (error (condition)
          (setf (lime.x11:lime-command-description command) old-detail
                (lime.x11:lime-command-action command) old-action)
          (dolist (entry old-functions)
            (if (cdr entry) (setf (fdefinition (car entry)) (cdr entry)) (fmakunbound (car entry))))
          (error condition))))))