;;; exwm.el -*- lexical-binding: t; -*-

(defun follie/run-in-background (command)
  (let ((command-parts (split-string command "[ ]+")))
    (apply #'call-process `(,(car command-parts) nil 0 nil ,@(cdr command-parts)))))

(defun follie/set-wallpaper ()
  (interactive)
  (start-process-shell-command
   "feh" nil "feh --no-fehbg --bg-fill --randomize ~/Pictures/Wallpapers/*"))

(defun follie/exwm-init-hook ()
  ;; Make workspace 1 the default at startup
  ;;(exwm-workspace-switch-create 1)

  ;; Open eshell at startup
  ;;(eshell)

  ;; Additional status info on modeline
  (setq display-time-day-and-date t)
  (display-time-mode 1)
  (if (not (equal "Battery status not available" (battery)))
        (display-battery-mode 1))

  ;; Startup apps
  (follie/run-in-background "pipewire")
  (follie/run-in-background "dunst")
  (follie/run-in-background "mpDris2")
  (start-process-shell-command "xsetroot" nil "xsetroot -cursor_name left_ptr"))
  (follie/run-in-background "greenclip daemon")

(defun follie/configure-window-by-class ()
  (interactive)
  (pcase exwm-class-name
    ("Komikku" (exwm-floating-toggle-floating)
               (exwm-layout-hide-mode-line))))

(defun follie/update-displays ()
  (lambda ()
    (start-process-shell-command
     "xrandr" nil "xrandr --output eDP-1 --mode 1920x1080 --pos 0x0 --rotate normal --output HDMI-1 --mode 1920x1080 --pos 1920x0 --rotate normal"))
  (follie/set-wallpaper)
  (message "Updated displays: %s"
           (string-trim (shell-command-to-string "xrandr | grep \" connected\" | awk '{print $1}' | sed '$!N;s/\\n/ /'"))))

(defun follie/exwm-rename-buffer ()
  (interactive)
  (exwm-workspace-rename-buffer
   (concat exwm-class-name ":"
           (if (<= (length exwm-title) 30) exwm-title
             (concat (substring exwm-title 0 29))))))

(use-package! exwm
  :config
  ;; Number of workspaces
  (setq exwm-workspace-number 6)

  ;; Extra stuff at startup
  (add-hook 'exwm-init-hook #'follie/exwm-init-hook)

  ;; Update buffer name
  (add-hook 'exwm-update-class-hook #'follie/exwm-rename-buffer)
  (add-hook 'exwm-update-title-hook #'follie/exwm-rename-buffer)

  ;; Force tiling by default
  ;;(setq exwm-manage-force-tiling t)
  ;; Window rules
  (add-hook 'exwm-manage-finish-hook #'follie/configure-window-by-class)

  ;; Automatically move EXWM buffer to current workspace
  (setq exwm-layout-show-all-buffers t)
  ;; Display all buffers in every workspace buffer list
  (setq exwm-workspace-show-all-buffers t)

  ;; Multi monitor
  (require 'exwm-randr)
  (setq exwm-randr-workspace-monitor-plist '(1 "HDMI-1"))
  (add-hook 'exwm-randr-screen-change-hook #'follie/update-displays)
  (exwm-randr-enable)

  ;; Set wallpapers after changing resolution
  ;;(follie/set-wallpaper)

  ;; System tray on minibuffer
  (require 'exwm-systemtray)
  (setq exwm-systemtray-height 20)
  (exwm-systemtray-enable)

  ;; Automatically send cursor to the selected display
  (setq exwm-workspace-warp-cursor t)
  ;; Focus follows cursor
  (setq mouse-autoselect-window t
        focus-follows-mouse t)

  ;; Keys that always pass through to Emacs in line-mode
  (setq exwm-input-prefix-keys
        '(?\C-x
          ?\C-u
          ?\C-g ;; keyboard-quit
          ?\C-h
          ?\M-x
          ?\M-`
          ?\M-&
          ?\M-:
          ?\C-\M-j))  ;; Buffer list

  ;; Ctrl+q to enable next key to be sent directly
  (define-key exwm-mode-map [?\C-q] 'exwm-input-send-next-key)

  ;; Global key bindings
  (setq exwm-input-global-keys
        `(
        ;; Reset to line-mode (C-c C-k switches to char-mode via exwm-input-release-keyboard)
        ([?\s-r] . exwm-reset)

        ;; Move between windows with arrow keys
        ([s-left] . windmove-left)
        ([s-right] . windmove-right)
        ([s-up] . windmove-up)
        ([s-down] . windmove-down)
        ;; or with vim keys
        ([?\s-h] . windmove-left)
        ([?\s-l] . windmove-right)
        ([?\s-k] . windmove-up)
        ([?\s-j] . windmove-down)

        ;; Launch applications via shell command
        ([?\s-&] . (lambda (command)
                (interactive (list (read-shell-command "$ ")))
                (start-process-shell-command command nil command)))

        ;; Switch workspace
        ([?\s-w] . exwm-workspace-switch)
        ([?\s-`] . (lambda () (interactive) (exwm-workspace-switch-create 0)))

        ;; 's-N': Switch to certain workspace with Super (Win) plus a number key (0 - 9)
        ,@(mapcar (lambda (i)
                `(,(kbd (format "s-%d" i)) .
                (lambda ()
                        (interactive)
                        (exwm-workspace-switch-create ,i))))
                (number-sequence 0 9))))
  (exwm-input-set-key (kbd "s-SPC") 'counsel-linux-app)
  (exwm-input-set-key (kbd "s-t") 'exwm-floating-toggle-floating)
  (exwm-input-set-key (kbd "s-f") 'exwm-layout-toggle-fullscreen)

  ;; Enable EXWM
  (exwm-enable)
  ;; Work around ido frame
  (require 'exwm-config)
  (exwm-config-ido)
  (ido-mode nil))

;; Edit everything in X windows with Emacs
(use-package! exwm-edit
  :after exwm
  :config
  (exwm-input-set-key (kbd "s-e") #'exwm-edit--compose))

;; xbps but with Emacs
;;(use-package! system-packages
;;  :config
;;  (setq system-packages-use-sudo t))

;; EMMS
;;(use-package! emms
;;  :init
;;  (setq emms-seek-seconds 10)
;;  :config
;;  (require 'emms-setup)
;;  (emms-all)
;;  (emms-default-players)
;;  ;; Play music with emms directly
;;  (setq emms-source-file-default-directory "~/Music/"
;;        emms-info-asynchronously 1
;;        emms-playlist-buffer-name "*EMMS-Music*"
;;        emms-source-file-directory-tree-function 'emms-source-file-directory-tree-find
;;        emms-browser-covers 'emms-browser-cache-thumbnail-async)
;;  ;; Or use mpd backend
;;  ;;(require 'emms-player-mpd)
;;  ;;(setq emms-player-mpd-server-name "localhost"
;;  ;;      emms-player-mpd-server-port "6600"
;;  ;;      emms-player-mpd-music-directory "~/Music")
;;  ;;(add-to-list 'emms-player-list 'emms-player-mpd)
;;  (add-to-list 'emms-info-functions
;;               ;;'emms-info-mpd
;;               'emms-info-exiftool))
;; Key maps for emms
;;(map! :leader
;;      :desc "Emms playlist"
;;      "e a" #'emms-playlist-mode-go
;;      :leader
;;      :desc "Emms browse by album"
;;      "e b" #'emms-browse-by-album
;;      :leader
;;      :desc "Emms pause track"
;;      "e x" #'emms-pause
;;      :leader
;;      :desc "Emms stop track"
;;      "e s" #'emms-stop
;;      :leader
;;      :desc "Emms previous track"
;;      "e p" #'emms-previous
;;      :leader
;;      :desc "Emms next track"
;;      "e n" #'emms-next)
;; Truncate emms module on mode line
;;(use-package! emms-mode-line-cycle
;;  :after emms
;;  :config
;;  (emms-playing-time 1)
;;  (emms-mode-line 1)
;;  (emms-mode-line-cycle 1))

;; Function keys
(use-package! desktop-environment
  :after exwm
  :diminish desktop-environment-mode
  :config
  ;; Give me back Super+l
  (progn
      (setf
       (alist-get (elt (kbd "s-l") 0) desktop-environment-mode-map nil t)
       nil)
      (desktop-environment-mode))
  (exwm-input-set-key (kbd "s-x") #'desktop-environment-lock-screen)
  :custom
  ;; Brightness
  (desktop-environment-brightness-get-command "brightnessctl")
  (desktop-environment-brightness-get-regexp "\\([0-9]+%\\)")
  (desktop-environment-brightness-set-command "brightnessctl set %s")
  (desktop-environment-brightness-small-increment "2%+")
  (desktop-environment-brightness-small-decrement "2%-")
  (desktop-environment-brightness-normal-increment "5%+")
  (desktop-environment-brightness-normal-decrement "5%-")
  ;; Volume
  (desktop-environment-volume-get-command "pulsemixer --get-volume")
  (desktop-environment-volume-get-regexp "\\([0-9]+ \\)")
  (desktop-environment-volume-toggle-command "pulsemixer --toggle-mute")
  (desktop-environment-volume-toggle-microphone-command nil)
  (desktop-environment-volume-set-command "pulsemixer --change-volume %s")
  (desktop-environment-volume-small-increment "+2")
  (desktop-environment-volume-small-decrement "-2")
  (desktop-environment-volume-normal-increment "+5")
  (desktop-environment-volume-normal-decrement "-5")
  ;; Screenshot
  (desktop-environment-screenshot-directory "~/Screenshots")
  (desktop-environment-screenshot-command "scrot -m -q 100 '%Y-%m-%d-%T_$wx$h.png'")
  (desktop-environment-screenshot-partial-command
   "scrot -s -f -l style=solid,width=2,color=\"red\" -q 100 '%Y-%m-%d-%T_$wx$h.png'")
  ;; Screenlock
  (desktop-environment-screenlock-command "~/.local/bin/X11/i3lock.sh"))

;; Control dunst
(defun follie/disable-desktop-notifications ()
  (interactive)
  (start-process-shell-command "notify-send" nil "notify-send \"DUNST_COMMAND_PAUSE\""))
(defun follie/enable-desktop-notifications ()
  (interactive)
  (start-process-shell-command "notify-send" nil "notify-send \"DUNST_COMMAND_RESUME\""))
(defun follie/toggle-desktop-notifications ()
  (interactive)
  (start-process-shell-command "notify-send" nil "notify-send \"DUNST_COMMAND_TOGGLE\""))

;; DuckDuckGo
(defun ddgr ()
  "Duck the web inside Emacs with `ddgr'"
  (interactive)
  (let* ((query (read-from-minibuffer "Search query: "))
         (results (shell-command-to-string (concat "ddgr -x --np --noua -C " query)))
         (buffer "*DuckDuckGo*"))
    (when (get-buffer buffer)
      (kill-buffer buffer))
    (with-current-buffer (generate-new-buffer buffer)
      (insert "** Search results:\n\n")
      (insert results))
    (switch-to-buffer buffer)
    (org-mode)
    (evil-goto-first-line)))