;;; terminal.el --- Userland terminal with vterm -*- lexical-binding: t -*-

;; This file is not part of GNU Emacs

;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.


;;; Commentary:

;; commentary

;;; Code:

(require 'transient)

(defcustom theurgy-enable-vterm-windows nil
  "Whether `vterm' should be enabled on Windows sytems."
  :type 'boolean
  :group 'theurgy
  :group 'theurgy-compat)

(when (or (equal system-type 'gnu/linux) theurgy-enable-vterm-windows)
  (use-package vterm
    :ensure t))

(defun theurgy-shell ()
  (interactive)
  (if (fboundp 'vterm)
      'vterm
    'shell))

(defun theurgy-bottom-shell ()
  "Put a shell in the bottom of the frame."
  (interactive)
  (let ((win (car (window-at-side-list nil 'bottom))))
    (if (and win (equal 'bottom (window-parameter win 'window-side)))
	(delete-window win)
      (funcall (theurgy-shell)))))

(defun theurgy-main-shell ()
  "Put a shell in a main window."
  (interactive)
  (if (get-buffer "*Shell Session*")
      (switch-to-buffer "*Shell Session*")
    (funcall (theurgy-shell) "*Shell Session*")))

(defun theurgy-gomuks ()
  "Launch gomuks as it's own buffer."
  (interactive)
  (if (get-buffer "*Gomuks*")
      (switch-to-buffer "*Gomuks*")
    (funcall (theurgy-shell) "*Gomuks*")
    (let ((buf (current-buffer)))
      (vterm-send-string "gomuks")
      (vterm-send-return)
      (rename-buffer "Gomuks"))))

(defun theurgy-gomuks-workspace ()
  "Launch gomuks as a workspace."
  (interactive)
  (theurgy-gomuks)
  (tab-rename "Gomuks")
  (tab-bar-change-tab-group "userland: gomuks"))

(define-key global-map (kbd "C-<return>") 'theurgy-main-shell)

(global-set-key (kbd "M-RET") 'theurgy-bottom-shell)
(when (fboundp 'vterm)
  (define-key vterm-mode-map (kbd "M-RET") 'theurgy-bottom-shell))

(add-to-list 'display-buffer-alist
             '("\\*vterm\\*\\|\\*shell\\*"
               (display-buffer-in-side-window)
               (side . bottom)
               (slot . 0)
               (window-height . 0.2)))

(use-package restart-emacs)

(use-package system-packages)

(transient-define-prefix system-interactions-transient ()
  "Transient menu for interfacing with the system via system-packages and restart."
  ["Emacs system actions" ("R" "Restart" restart-emacs)]
  ["Package..." ("s" "Search" system-packages-search)
   ("u" "Update" system-packages-update)
   ("i" "Install" system-packages-install)
   ("r" "Uninstall" system-packages-uninstall)
   ("o" "Remove Orphans" system-packages-remove-orphaned)])

(define-key global-map (kbd "C-c o s") #'system-interactions-transient)

(provide 'terminal)

;;; terminal.el ends here