(define-module (tw services desktop)
  #:use-module (gnu)
  #:use-module (gnu home services)
  #:use-module (gnu home services mail)
  #:use-module (gnu home services mcron)
  #:use-module (gnu home services shepherd)
  #:use-module (gnu home services sound)
  #:use-module ((gnu packages admin) #:select (ansible shepherd))
  #:use-module ((gnu packages aidc) #:select (qrencode))
  #:use-module ((gnu packages bittorrent) #:select (transmission-remote-gtk))
  #:use-module ((gnu packages calendar) #:select (khal))
  #:use-module ((gnu packages check) #:select (actionlint))
  #:use-module ((gnu packages chromium) #:select (ungoogled-chromium))
  #:use-module ((gnu packages compton) #:select (picom))
  #:use-module ((gnu packages dav) #:select (vdirsyncer))
  #:use-module ((gnu packages fonts) #:select (font-fira-code font-fira-sans font-google-noto font-google-noto-emoji font-google-noto-sans-cjk font-google-noto-serif-cjk font-hermit font-inconsolata font-libertinus font-openmoji))
  #:use-module ((gnu packages freedesktop) #:select (elogind wev wtype xdg-utils xdg-desktop-portal xdg-desktop-portal-wlr))
  #:use-module ((gnu packages games) #:select (bsd-games))
  #:use-module ((gnu packages gimp) #:select (gimp))
  #:use-module ((gnu packages gl) #:select (mesa))
  #:use-module ((gnu packages gnome) #:select (dconf dconf-editor network-manager-applet vinagre))
  #:use-module ((gnu packages gnome-xyz) #:select (papirus-icon-theme))
  #:use-module ((gnu packages gnuzilla) #:select (icecat))
  #:use-module ((gnu packages graphviz) #:select (xdot))
  #:use-module ((gnu packages image) #:select (grim slurp))
  #:use-module ((gnu packages image-viewers) #:select (imv))
  #:use-module ((gnu packages inkscape) #:select (inkscape))
  #:use-module ((gnu packages libreoffice) #:select (libreoffice))
  #:use-module ((gnu packages linux) #:select (acpilight procps powertop radeontop))
  #:use-module ((gnu packages mail) #:select (aerc khard))
  #:use-module ((gnu packages maths) #:select (qalculate-gtk))
  #:use-module ((gnu packages messaging) #:select (nheko))
  #:use-module ((gnu packages networking) #:select (blueman))
  #:use-module ((gnu packages package-management) #:select (modules))
  #:use-module ((gnu packages pdf) #:select (zathura zathura-pdf-poppler zathura-ps poppler-qt6))
  #:use-module ((gnu packages pulseaudio) #:select (pulsemixer))
  #:use-module ((gnu packages python-build) #:select (python-setuptools-scm))
  #:use-module ((gnu packages python-check) #:select (python-mypy python-tox))
  #:use-module ((gnu packages ssh) #:select (pdsh))
  #:use-module ((gnu packages syndication) #:select (newsboat))
  #:use-module ((gnu packages tcl) #:select (tk))
  #:use-module ((gnu packages terminals) #:select (foot kitty))
  #:use-module ((gnu packages tex) #:select (texlive-scheme-small texlive-latexmk texlive-moderncv texlive-fontawesome5 texlive-multirow texlive-arydshln texlive-libertine texlive-inconsolata texlive-newtx texlive-babel texlive-csquotes texlive-siunitx texlive-minted texlive-svg texlive-hyperref texlive-capt-of texlive-ulem texlive-trimspaces texlive-transparent texlive-graphics texlive-tools texlive-wrapfig texlive-amsmath texlive-amsfonts texlive-txfonts))
  #:use-module ((gnu packages version-control) #:select (git))
  #:use-module ((gnu packages video) #:select (mpv obs obs-pipewire-audio-capture))
  #:use-module ((gnu packages web-browsers) #:select (lynx))
  #:use-module ((gnu packages wm) #:select (i3lock dunst polybar swaybg swayfx swayidle swaylock waybar))
  #:use-module ((gnu packages xdisorg) #:select (arandr numlockx hsetroot rofi rofi-calc rofi-wayland wl-clipboard wob xclip xdotool xsel))
  #:use-module ((gnu packages xfce) #:select (xfce4-screenshooter))
  #:use-module ((gnu packages xorg) #:select (xdpyinfo xev xfd xfontsel xinput xkill xprop xrandr xset xrdb xwininfo setxkbmap))
  #:use-module ((games packages minecraft) #:select (prismlauncher))
  #:use-module ((nongnu packages nvidia) #:select (nvda))
  #:use-module ((nongnu packages nvidia) #:select (nvidia-system-monitor))
  #:use-module (gnu services configuration)
  #:use-module (guix gexp)
  #:use-module (guix packages)
  #:use-module ((guix records) #:select (match-record))
  #:use-module ((nongnu packages game-client) #:select (steam steam-nvidia))
  #:use-module ((nongnu packages messaging) #:select (signal-desktop))
  #:use-module ((nongnu packages nvidia) #:select (nvda nvidia-system-monitor))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (tw gexp)
  #:use-module ((tw packages alice) #:select (python-alibuild python-alidistlint))
  #:use-module (tw packages catppuccin)
  #:use-module ((tw packages ci) #:select (hashicorp-packer-bin))
  #:use-module ((tw packages games) #:select (szio-solitaire))
  #:use-module ((tw packages mail) #:select (mutt_oauth2.py))
  #:use-module ((tw packages scanner) #:select (simple-scan/airscan))
  #:use-module ((tw packages xorg) #:select (xcwd))
  #:use-module ((tw packages zoom) #:select (zoom/wayland))
  #:use-module (tw theme)
  #:export (home-desktop-configuration
            home-monitor-configuration
            home-desktop-service-type
            home-wayland-desktop-configuration
            home-wayland-desktop-service-type
            home-gaming-configuration
            home-gaming-service-type
            home-pim-configuration
            home-pim-service-type))

(define common-desktop-packages
  (list
   ;; CLI tools
   bsd-games powertop (list git "send-email") pdsh qrencode
   texlive-scheme-small texlive-latexmk
   ;; For CV:
   texlive-moderncv texlive-fontawesome5 texlive-multirow texlive-arydshln
   texlive-libertine texlive-inconsolata texlive-newtx texlive-babel
   texlive-csquotes texlive-siunitx
   ;; For org-mode export:
   texlive-minted texlive-svg texlive-hyperref texlive-capt-of texlive-ulem
   texlive-trimspaces texlive-transparent texlive-graphics texlive-tools
   texlive-wrapfig texlive-amsmath texlive-amsfonts texlive-libertine
   texlive-newtx texlive-txfonts texlive-inconsolata

   ;; Work
   actionlint ansible hashicorp-packer-bin modules vinagre
   python-tox python-setuptools-scm python-mypy

   ;; Fonts
   font-hermit font-inconsolata font-fira-code font-fira-sans font-libertinus
   ;; Base Noto doesn't include CJK, so install those separately.
   font-google-noto font-google-noto-sans-cjk font-google-noto-serif-cjk
   font-google-noto-emoji font-openmoji ; for polybar
   ;; Theming
   papirus-icon-theme catppuccin-gtk-theme catppuccin-mocha-dark-cursors
   ;; Games (larger games installed in ~/.guix-profile to avoid frequent huge downloads).
   szio-solitaire
   ;; 0ad flightgear freeciv simutrans/pak128 warzone2100 widelands pioneer

   ;; GUI applications common to X11 and Wayland
   ;; acpilight is a drop-in xbacklight replacement, as xbacklight doesn't work on my system.
   acpilight blueman gimp inkscape icecat imv libreoffice mpv pulsemixer
   simple-scan/airscan transmission-remote-gtk tk xdg-utils xdot zoom/wayland
   zathura zathura-ps zathura-pdf-poppler
   poppler-qt6                 ; for pdfunite, pdfseparate etc
   ungoogled-chromium          ; needed e.g. for Interrail site & DRM video
   dconf dconf-editor))        ; required for config by blueman, cozy, ...

(define common-xdg-configs
  `(("alibuild/disable-analytics"    ; All alibuild needs is an empty file.
     ,(plain-file "alibuild-disable-analytics" ""))
    ("gtk-2.0/gtkrc" ,(local-file "files/gtk2.ini"))
    ("gtk-3.0/settings.ini" ,(local-file "files/gtk3.ini"))
    ("kdeglobals" ,catppuccin-kdeglobals)
    ("mimeapps.list" ,(local-file "files/mimeapps.list"))
    ("zathura/zathurarc" ,(local-file "files/zathurarc"))
    ("zathura/catppuccin" ,catppuccin-zathura)))

(define common-home-files
  `((".icons/default/index.theme" ,(local-file "files/cursors.ini"))
    ;; With #:recursive? #t, Guix keeps the files' permission bits, i.e. makes them executable.
    (".local/bin/sessionmenu" ,(local-file "files/sessionmenu" #:recursive? #t))
    (".local/bin/passmenu" ,(local-file "files/passmenu" #:recursive? #t))
    (".local/bin/volume" ,(local-file "files/volume" #:recursive? #t))))


;; Desktop services, including monitor layout

(define-maybe/no-serialization string)

(define (list-of-strings? thing)
  (and (list? thing) (every string? thing)))

(define-configuration/no-serialization home-monitor-configuration
  (name string "The monitor's name in X11.")
  (xrandr-options (list-of-strings '()) "Options to pass to xrandr to
configure this monitor."))

(define (list-of-monitors? thing)
  (and (list? thing) (every home-monitor-configuration? thing)))

(define-configuration/no-serialization home-desktop-configuration
  (nvidia-driver? (boolean #f) "Adapt the X11 desktop for the proprietary
NVIDIA driver?")
  (desktop-background
   (file-like (file-append tw-background "/share/backgrounds/tw/blobs.png"))
   "An image that will be set as the desktop background.")
  (battery-name maybe-string "The device name of the system's battery, if any.
See @code{/sys/class/power_supply}.")
  (ac-adapter-name maybe-string "The device name of the system's mains power
supply, if any.  See @code{/sys/class/power_supply}.")
  ;; The default mirrors the previously hard-coded value from polybar.ini, for
  ;; compatibility.  It is probably not a great default; "0" might be better.
  (thermal-zone (string "1") "The number of the thermal sensor used to show
the system temperature.  Run @code{grep '^' /sys/class/thermal/thermal_zone*/type}
to list zones and their types.")
  (monitors list-of-monitors "List of monitor declarations to apply."))

(define polybar-wrapper
  (program-file "polybar-wrapper"
    #~(begin
        ;; This wrapper program checks that the monitor we want to start
        ;; polybar on is actually connected.
        (use-modules (ice-9 popen)
                     (ice-9 rdelim))
        (let* ((connected-str (string-append (getenv "POLYBAR_MONITOR") " connected"))
               (xrandr (open-pipe* OPEN_READ #$(file-append xrandr "/bin/xrandr") "-q"))
               (monitor-connected?
                (let loop ((line (read-line xrandr)))
                  (cond
                   ((eof-object? line) #f)                   ; we didn't find our monitor connected
                   ((string-prefix? connected-str line) #t)  ; the monitor we want is connected
                   (else (loop (read-line xrandr)))))))      ; keep looking
          (close-pipe xrandr)
          (when monitor-connected?
            (execl #$(file-append polybar "/bin/polybar") "polybar"))))))

(define (polybar-service monitor battery-name ac-adapter-name thermal-zone)
  (shepherd-service
   (documentation (string-append "Polybar desktop bar for monitor " monitor "."))
   (provision (list (symbol-append 'polybar- (string->symbol monitor))))
   (requirement '(xorg-setup))
   (start #~(make-forkexec-constructor
             (list #$polybar-wrapper)
             #:environment-variables
             (cons* #$(string-append "POLYBAR_MONITOR=" monitor)
                    #$(string-append "POLYBAR_BATTERY=" (maybe-value battery-name ""))
                    #$(string-append "POLYBAR_AC_ADAPTER=" (maybe-value ac-adapter-name ""))
                    #$(string-append "POLYBAR_THERMAL_ZONE=" thermal-zone)
                    (default-environment-variables))))
   (stop #~(make-kill-destructor))))

(define (home-packages config)
  "Install packages I use frequently."
  (cons*
   ;; i3 and Xorg. i3 itself must be installed system-wide for gdm to pick it up.
   arandr dunst hsetroot kitty polybar rofi rofi-calc xclip xcwd xdotool
   xdpyinfo xev xfd xfontsel xinput xkill xprop xrandr xrdb xsel xset xwininfo
   xfce4-screenshooter  ; only supports X11 for now: https://gitlab.xfce.org/apps/xfce4-screenshooter/-/merge_requests/52

   common-desktop-packages))

(define xfce4-screenshooter.conf
  (mixed-text-file "xfce4-screenshooter.conf" "\
app=" imv "/bin/imv
custom_action_command=none
last_user=
last_extension=png
screenshot_dir=file:/home/timo/pictures
enable_imgur_upload=false
show_in_folder=false
action=1
delay=0
region=3
show_mouse=0
show_border=1
"))

(define (home-xdg-configs config)
  "Configuration files that follow the XDG basedir spec."
  `(;; X11 environment configuration.
    ("X11/XCompose" ,(local-file "files/XCompose")) ; see also: $XCOMPOSEFILE variable
    ;; Configuration files for GUI programs in $XDG_CONFIG_HOME.  Some
    ;; of these may also work under Wayland, but some are X11-specific.
    ("dunst/dunstrc" ,(local-file "files/dunstrc"))
    ("dunst/dunstrc.d/50-catppuccin.conf" ,catppuccin-dunstrc)
    ("i3/config" ,(local-file "files/i3.conf"))
    ;; TODO: "kdeglobals" works for some programs (e.g. kdeconnect-app),
    ;; but not for others (e.g. nheko, kdeconnect-settings)...
    ("kitty/diff.conf"
     ,(combined-text-file "kitty-diff.conf"
        (plain-file "kitty-diff-custom.conf"
          "pygments_style bw\n")
        catppuccin-kitty-diff))
    ("kitty/kitty.conf"
     ,(combined-text-file "kitty.conf"
        (local-file "files/kitty.conf")
        catppuccin-kitty))
    ("polybar/config.ini" ,(local-file "files/polybar.ini"))
    ("polybar/catppuccin.ini" ,catppuccin-polybar)
    ("rofi/config.rasi" ,(local-file "files/rofi.rasi"))
    ("rofi/themes/catppuccin.rasi" ,catppuccin-rofi)
    ("xfce4/xfce4-screenshooter" ,xfce4-screenshooter.conf)
    ,@common-xdg-configs))

(define (home-files config)
  "Extra configuration files and binaries that don't follow the XDG spec."
  `(;; https://sw.kovidgoyal.net/kitty/kittens/diff/
    (".local/bin/kdiff"                 ; show a diff
     ,(program-file "kdiff"
        #~(apply execl #$(file-append kitty "/bin/kitty") "kitty"
                 "+kitten" "diff" (cdr (command-line)))))
    (".local/bin/icat"                  ; kitty's "catimg" equivalent
     ,(program-file "icat"
        #~(apply execl #$(file-append kitty "/bin/kitty") "kitty"
                 "+kitten" "icat" (cdr (command-line)))))
    (".local/bin/screenlock"
     ,(program-file "screenlock"
        #~(begin ; Wrapper around i3lock to turn off the screen and pause notifications.
            (system* #$(file-append dunst "/bin/dunstctl") "set-paused" "true")
            (system* #$(file-append xset "/bin/xset") "dpms" "0" "0" "5")
            ;; i3lock needs to have a `pam-root-service-type' entry or be
            ;; installed as a setuid binary for this to work.
            (system* #$(file-append i3lock "/bin/i3lock") "-nc" #$catppuccin-background-color)
            (system* #$(file-append xset "/bin/xset") "dpms" "600" "600" "600")
            (system* #$(file-append dunst "/bin/dunstctl") "set-paused" "false"))))
    ,@common-home-files))

(define (home-environment config)
  `(("TERMINAL" . "kitty")
    ("QT_X11_NO_MITSHM" . "1")  ; fixes a Steam issue: https://gitlab.com/nonguix/nonguix/-/issues/267
    ;; Smooth trackpad scrolling in Firefox/Icecat.
    ;; https://wiki.archlinux.org/index.php/Firefox/Tweaks#Pixel-perfect_trackpad_scrolling
    ("MOZ_USE_XINPUT2" . "1")
    ("_JAVA_OPTIONS" .
     ,(string-append
       "$_JAVA_OPTIONS${_JAVA_OPTIONS:+ }"
       "-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true "
       "-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel "
       "-Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel"))))

(define (home-shepherd-services config)
  "Run various daemons in my user profile."
  (match-record config <home-desktop-configuration>
                (nvidia-driver? desktop-background battery-name ac-adapter-name thermal-zone monitors)
    `(,(shepherd-service
        (documentation "NetworkManager applet; provides a GUI for network connections.")
        (provision '(nm-applet))
        (requirement '(x11-display))
        (start #~(make-forkexec-constructor
                  (list #$(file-append network-manager-applet "/bin/nm-applet"))))
        (stop #~(make-kill-destructor)))

      ,(shepherd-service
        (documentation "Blueman applet; provides a GUI for connection to bluetooth devices.")
        (provision '(blueman-applet))
        (requirement '(x11-display))
        (start #~(make-forkexec-constructor
                  (list #$(file-append blueman "/bin/blueman-applet"))))
        (stop #~(make-kill-destructor)))

      ,(shepherd-service
        (documentation "Dunst notification daemon; displays desktop notifications.")
        (provision '(dunst))
        (requirement '(x11-display))
        (start #~(make-forkexec-constructor
                  (list #$(file-append dunst "/bin/dunst"))))
        (stop #~(make-kill-destructor)))

      ;; Picom needs to use the proprietary nvidia driver's libgl if that
      ;; driver is used for Xorg; plain Mesa won't work then.
      ,(let ((grafter
              (if nvidia-driver?
                  (package-input-rewriting
                   `((,mesa . ,(package (inherit mesa) (replacement nvda)))))
                  identity)))
         (shepherd-service
          (documentation "Picom compositor; enables transparent windows in X.")
          (provision '(picom))
          (requirement '(x11-display))
          (start #~(make-forkexec-constructor
                    (list #$(file-append (grafter picom) "/bin/picom")
                          "--config" #$(local-file "files/picom.conf"))))
          (stop #~(make-kill-destructor))))

      ,(shepherd-service
        (documentation "Source Xresources on login.")
        (provision '(xrdb))
        (requirement '(x11-display))
        (one-shot? #t)
        (start #~(lambda _
                   (invoke #$(file-append xrdb "/bin/xrdb") "-merge"
                           #$(local-file "files/Xresources")))))

      ;; By default, xdotool gets most of "#@\|~()<>[]{} wrong.  Make
      ;; it use the correct keymap by re-setting the same one again.
      ,(shepherd-service
        (documentation "Fix X keyboard map on login; passmenu needs this.")
        (provision '(fix-xdotool))
        (requirement '(x11-display))
        (one-shot? #t)
        (modules '((ice-9 rdelim)
                   (ice-9 regex)
                   (ice-9 popen)))
        (start #~(lambda _
                   (let ((port (open-pipe* OPEN_READ #$(file-append setxkbmap "/bin/setxkbmap")
                                           "-query")))
                     (let loop ((line (read-line port)))
                       (unless (eof-object? line)
                         (let ((mtch (string-match "^layout:[[:space:]]*" line)))
                           (if mtch
                               (system* #$(file-append setxkbmap "/bin/setxkbmap")
                                        (match:suffix mtch))
                               (loop (read-line port))))))))))

      ,(shepherd-service
        (documentation "Set up X displays on login.")
        (provision '(xorg-setup))
        (one-shot? #t)
        (start #~(lambda _
                   (define (replace-home path)
                     (if (string-prefix? "~/" path)
                         (string-replace path (getenv "HOME") 0 1)
                         path))
                   (system* #$(file-append numlockx "/bin/numlockx") "on")
                   ;; Turn off the monitors if there is no input for 10 minutes.
                   (system* #$(file-append xset "/bin/xset") "dpms" "600" "600" "600")
                   (system* #$(file-append xrandr "/bin/xrandr")
                            #$@(append-map (lambda (monitor)
                                             (match-record monitor <home-monitor-configuration>
                                                           (name xrandr-options)
                                               `("--output" ,name ,@xrandr-options)))
                                           monitors))
                   ;; Set the desktop background picture. Hopefully doing this just after
                   ;; xrandr works and sets it for both screens.
                   (system* #$(file-append hsetroot "/bin/hsetroot")
                            "-cover" (replace-home #$desktop-background)))))

      ,@(map (compose (cut polybar-service <> battery-name ac-adapter-name thermal-zone)
                      home-monitor-configuration-name)
             monitors))))

(define home-desktop-service-type
  (service-type
   (name 'desktop)
   (description "Configure the desktop environment.")
   (extensions
    (list (service-extension home-profile-service-type home-packages)
          (service-extension home-xdg-configuration-files-service-type home-xdg-configs)
          (service-extension home-files-service-type home-files)
          (service-extension home-environment-variables-service-type home-environment)
          (service-extension home-shepherd-service-type home-shepherd-services)))))


;;; Wayland-based desktop services

(define-configuration/no-serialization home-wayland-desktop-configuration
  (num-cores integer "Number of cores on the system.  Used for waybar CPU
display."))

(define (home-wayland-packages config)
  "Install packages I use frequently."
  ;; Wayland-specific desktop tools
  (cons* swayfx dunst foot grim rofi-wayland slurp swaybg wev wob wtype wl-clipboard qalculate-gtk
         obs obs-pipewire-audio-capture              ; to hack screen sharing
         xdg-desktop-portal xdg-desktop-portal-wlr   ; to set XDG_DESKTOP_PORTAL_DIR search path
         common-desktop-packages))

(define %waybar-dunst-signal 13)

(define (waybar-configuration num-cores)
  ;; For documentation, see:
  ;; https://github.com/Alexays/Waybar/wiki/Configuration
  (json-file "waybar.json"
    `((reload_style_on_change . #t)
      (layer . "top")   ; put top bar above other windows' shadows

      (modules-left . #("sway/mode" "sway/workspaces" "custom/separator"
                        "sway/window"))
      (modules-center . #())
      (modules-right . #("network" "custom/separator"
                         "memory" "custom/separator"
                         "cpu" "custom/separator"
                         "temperature" "custom/separator"
                         "pulseaudio" "custom/separator"
                         "battery" "custom/separator"
                         "clock" "custom/dunst" "custom/separator"
                         "tray"))

      (custom/separator (format . "·") (interval . "once") (tooltip . #f))

      (sway/workspaces (all-outputs . #t) (format . "{name}"))
      (sway/window (max-length . 80) (icon . #t) (icon-size . 16))

      (network
       (interval . 10)
       (format . "<span color='#f9e2af'>??</span> {ifname}")
       (format-linked . "<span face='OpenMoji' fallback='false' color='#f38ba8'>🌐</span>")
       (format-disconnected . "<span face='OpenMoji' fallback='false' color='#f38ba8'>🌐</span>")
       (format-disabled . "<span face='OpenMoji' fallback='false' color='#f38ba8'>🌐</span>")
       (format-ethernet . "<span face='OpenMoji' fallback='false' color='#a6e3a1'>🌐</span> <span color='#a6adc8'>⇅ {bandwidthTotalBytes}</span>")
       (format-wifi . "{icon} {essid} <span color='#a6adc8'>⇅ {bandwidthTotalBytes}</span>")
       (format-icons . #("<span face='OpenMoji' fallback='false' color='#f38ba8'>📶</span>"
                         "<span face='OpenMoji' fallback='false' color='#f9e2af'>📶</span>"
                         "<span face='OpenMoji' fallback='false' color='#a6e3a1'>📶</span>"))
       (tooltip-format . "{ifname}")
       (tooltip-format-wifi . "{ifname}: {ipaddr} ({signalStrength}%, {frequency}GHz)")
       (tooltip-format-ethernet . "{ifname}: {ipaddr} ({bandwidthTotalBytes})"))

      (cpu
       (interval . 2)
       (format . ,(apply string-append "<span color='#a6adc8'>CPU</span> "
                         (map (cut format #f "{icon~d}" <>)
                              (iota num-cores))))
       (format-icons . #("<span color='#585b70'>▁</span>"
                         "<span color='#cdd6f4'>▂</span>"
                         "<span color='#cdd6f4'>▃</span>"
                         "<span color='#cdd6f4'>▄</span>"
                         "<span color='#cdd6f4'>▅</span>"
                         "<span color='#cdd6f4'>▆</span>"
                         "<span color='#f9e2af'>▇</span>"
                         "<span color='#f9e2af'>█</span>")))

      (temperature
       (format . "<span color='#a6e3a1'>🌡</span> {temperatureC}°C")
       (format-critical . "<span color='#f38ba8'>🌡</span> {temperatureC}°C"))

      (memory
       (interval . 5)
       (format . "<span color='#a6adc8'>RAM</span> {used} GiB"))

      (battery
       (states (medium . 80) (critical . 20))
       (format-discharging . "{icon} {capacity}% {power:.1f}W {time}")
       (format-charging . "<span face='OpenMoji' fallback='false' color='#a6e3a1'>🔌</span> {capacity}% {power:.1f}W {time}")
       (format-full . "")
       (format-icons . #("<span face='OpenMoji' fallback='false' color='#f38ba8'>🔋</span>"
                         "<span face='OpenMoji' fallback='false' color='#f9e2af'>🔋</span>"
                         "<span face='OpenMoji' fallback='false' color='#f9e2af'>🔋</span>"
                         "<span face='OpenMoji' fallback='false' color='#f9e2af'>🔋</span>"
                         "<span face='OpenMoji' fallback='false' color='#a6e3a1'>🔋</span>")))

      (pulseaudio
       (scroll-step . 1)
       (format . "<span color='#f9e2af'>{icon}</span> {volume}%")
       (format-bluetooth . "<span color='#89b4fa'>{icon}</span> {volume}%")
       (format-muted . "<span face='OpenMoji' fallback='false' color='#a6adc8'>🔇</span>")
       (format-icons (default . #("<span face='OpenMoji' fallback='false'>🔈</span>"
                                  "<span face='OpenMoji' fallback='false'>🔉</span>"
                                  "<span face='OpenMoji' fallback='false'>🔊</span>")))
       (tooltip-format . "{desc}: {volume}%")
       (on-click . "volume toggle-mute")
       (on-click-right . "foot pulsemixer"))

      (custom/dunst
       (exec . "echo '{\"alt\": \"'$(dunstctl is-paused)'\"}'")
       (return-type . "json")
       (interval . 10)
       (signal . ,%waybar-dunst-signal)  ; SIGRTMIN + %waybar-dunst-signal
       (format-icons (true . "<span face='OpenMoji' fallback='false'>🔕</span>") (false . ""))
       (format . "{icon}"))

      (clock
       (format . "{:%a, %e %b %H:%M}")
       (tooltip-format . "<tt><small>{calendar}</small></tt>")
       (calendar
        (mode . "year")
        (mode-mon-col . 3)
        (on-scroll . 1)
        (format (months   . "<span color='#f9e2af'><b>{}</b></span>")
                (days     . "<span color='#cdd6f4'>{}</span>")
                (weekdays . "<span color='#fab387'><b>{}</b></span>")
                (today    . "<span color='#f38ba8'><b><u>{}</u></b></span>"))))

      (tray (icon-size . 16) (spacing . 4)))))

(define-public %sway-common-configuration
  (mixed-text-file "sway-greetd.conf" "\
font pango:Fira Sans 10

input type:keyboard {
    xkb_layout \"gb\"
    xkb_options \"caps:swapescape,parens:swap_brackets,terminate:ctrl_alt_bksp,compose:rctrl,keypad:oss,kpdl:kposs\"
    xkb_numlock enabled
}

input type:touchpad {
    # libinput configuration for touchpad
    dwt enabled   # 'disabled while typing'
    middle_emulation enabled
    natural_scroll enabled
    click_method clickfinger
    scroll_method two_finger
    tap enabled
    tap_button_map lrm
    drag enabled
    drag_lock disabled
}

output * background " tw-background "/share/backgrounds/tw/blobs.png fill

# swayfx effects
blur enable
shadows enable
corner_radius 6
"))

(define (home-wayland-xdg-configs config)
  ;; Wayland also uses the XCompose file.
  (match-record config <home-wayland-desktop-configuration> (num-cores)
    `(("X11/XCompose" ,(local-file "files/XCompose")) ; see also: $XCOMPOSEFILE variable
      ("dunst/dunstrc" ,(local-file "files/dunstrc"))
      ("dunst/dunstrc.d/50-catppuccin.conf" ,catppuccin-dunstrc)
      ("foot/foot.ini" ,(local-file "files/foot.ini"))
      ("foot/catppuccin.ini" ,catppuccin-foot)
      ("rofi/config.rasi" ,(local-file "files/rofi.rasi"))
      ("rofi/themes/catppuccin.rasi" ,catppuccin-rofi)
      ("sway/config"
       ,(combined-text-file "sway.conf"
          %sway-common-configuration
          (local-file "files/sway.conf")))
      ("swaylock/config"
       ,(combined-text-file "swaylock.conf"
          (mixed-text-file "swaylock-settings.conf"
            "image=" tw-background "/share/backgrounds/tw/blobs.png\n"
            "scaling=fill\n"
            "font=Fira Sans\n"
            "font-size=12\n"
            "indicator-idle-visible\n"
            "show-keyboard-layout\n"
            "show-failed-attempts\n")
          catppuccin-swaylock))
      ("waybar/config.jsonc" ,(waybar-configuration num-cores))
      ("waybar/style.css" ,(local-file "files/waybar.css"))
      ("waybar/catppuccin.css" ,catppuccin-waybar)
      ,@common-xdg-configs)))

(define (home-wayland-files config)
  `((".local/bin/wlprop" ,(local-file "files/wlprop" #:recursive? #t))
    ,@common-home-files))

(define (home-wayland-environment config)
  `(;; Smooth trackpad scrolling in Firefox/Icecat.
    ;; https://wiki.archlinux.org/index.php/Firefox/Tweaks#Pixel-perfect_trackpad_scrolling
    ("MOZ_ENABLE_WAYLAND" . "1")
    ("TERMINAL" . "foot")             ; needed for rofi-sensible-terminal
    ("QT_QPA_PLATFORM" . "wayland")   ; needed for Qt apps, e.g. obs
    ("ELECTRON_OZONE_PLATFORM_HINT" . "wayland")  ; for Electron apps, e.g. signal-desktop
    ("SDL_VIDEODRIVER" . "wayland")   ; needed by SDL2 games, e.g. szio-solitaire
    ("XDG_CURRENT_DESKTOP" . "sway")  ; not sure why this isn't set by default
    ("_JAVA_OPTIONS" .
     ,(string-append
       "$_JAVA_OPTIONS${_JAVA_OPTIONS:+ }"
       "-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true "
       "-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel "
       "-Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel"))))

(define wayland-screenlock-program
  ;; Wrapper around swaylock to turn off the screen and pause notifications.
  (program-file "wayland-screenlock"
    ;; If swaylock is already running, don't lock again.
    #~(unless (zero? (status:exit-val
                      (system* #$(file-append procps "/bin/pgrep")
                               "-xU" (number->string (getuid)) "swaylock")))
        ;; Rely on swayidle to turn off the screen after a timeout.
        (system* #$(file-append dunst "/bin/dunstctl") "set-paused" "true")
        (system* #$(file-append shepherd "/bin/herd") "kick-dunst" "waybar")
        (system* #$(file-append swaylock "/bin/swaylock"))
        (system* #$(file-append dunst "/bin/dunstctl") "set-paused" "false")
        (system* #$(file-append shepherd "/bin/herd") "kick-dunst" "waybar"))))

(define (home-wayland-shepherd-services config)
  (define wayland-environment-variables
    (let ((vars '("XDG_RUNTIME_DIR" "WAYLAND_DISPLAY" "SWAYSOCK")))
      #~(cons*
         #$@(map (lambda (var) #~(string-append #$var "=" (getenv #$var))) vars)
         (filter (lambda (assignment)
                   (not (or #$@(map (lambda (var)
                                      #~(string-prefix? #$(string-append var "=") assignment))
                                    vars))))
                 (default-environment-variables)))))

  (list
   (shepherd-service   ; adjusted from Guix x11-display service
    (provision '(wayland-display))
    (modules '((ice-9 ftw)
               (ice-9 match)
               (ice-9 receive)
               (srfi srfi-1)))
    (start
     #~(lambda* (#:optional
                 (display (getenv "WAYLAND_DISPLAY"))
                 (swaysock (getenv "SWAYSOCK")))
         (define runtime-directory
           (or (getenv "XDG_RUNTIME_DIR")
               (format #f "/run/user/~d" (getuid))))

         (define (correct-socket? prefix)
           (lambda (name)
             (let ((path (in-vicinity runtime-directory name)))
               (and (string-prefix? prefix name)
                    (eq? 'socket (stat:type (stat path)))
                    (access? path O_RDWR)))))

         (define (find-display delay)
           ;; Wait for an accessible socket to show up in RUNTIME-DIRECTORY,
           ;; up to DELAY seconds.
           (let loop ((attempts delay))
             (define wayland-socket
               (find (correct-socket? "wayland-")
                     (or (scandir runtime-directory) '())))
             (define sway-socket
               (find (correct-socket? "sway-ipc.")
                     (or (scandir runtime-directory) '())))

             (cond
              ((and wayland-socket sway-socket)
               (let ((swaysock (in-vicinity runtime-directory sway-socket)))
                 (format #t "Wayland server found at ~s. Sway socket found at ~s.~%"
                         wayland-socket swaysock)
                 (values wayland-socket swaysock)))
              ((zero? attempts)
               (format (current-error-port)
                       "Wayland server or Sway socket did not show up; giving up.~%")
               (values #f #f))
              (else (sleep 1) (loop (- attempts 1))))))

         (receive (wayland-socket sway-socket) (find-display 10)
           (let ((display (or display wayland-socket))
                 (swaysock (or swaysock sway-socket)))
             (setenv "XDG_RUNTIME_DIR" runtime-directory)
             (when display
               (setenv "WAYLAND_DISPLAY" display))
             (when swaysock
               (setenv "SWAYSOCK" swaysock))
             display))))
    (stop #~(lambda _
              (unsetenv "WAYLAND_DISPLAY")
              (unsetenv "SWAYSOCK")
              #f))
    (respawn? #f))

   ;; Using `make-forkexec-constructor' does not work because we need to
   ;; inherit the variables from `wayland-display' at start time, not at
   ;; definition time.
   (shepherd-service
    (documentation "NetworkManager applet; provides a GUI for network connections.")
    (provision '(nm-applet))
    (requirement '(wayland-display))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append network-manager-applet "/bin/nm-applet"))
                #:environment-variables #$wayland-environment-variables)))
    (stop #~(make-kill-destructor)))

   (shepherd-service
    (documentation "Blueman applet; provides a GUI for connection to bluetooth devices.")
    (provision '(blueman-applet))
    (requirement '(wayland-display))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append blueman "/bin/blueman-applet"))
                #:environment-variables #$wayland-environment-variables)))
    (stop #~(make-kill-destructor)))

   (shepherd-service
    (documentation "Dunst notification daemon; displays desktop notifications.")
    (provision '(dunst))
    (requirement '(wayland-display))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append dunst "/bin/dunst"))
                #:environment-variables #$wayland-environment-variables)))
    (stop #~(make-kill-destructor)))

   (shepherd-service
    (documentation "XDG desktop portal dispatcher.")
    (provision '(xdg-desktop-portal))
    (requirement '(wayland-display dbus))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append xdg-desktop-portal
                                     "/libexec/xdg-desktop-portal") "-rv")
                #:environment-variables
                (cons* "XDG_CURRENT_DESKTOP=sway"
                       #;(string-append "XDG_DESKTOP_PORTAL_DIR=" #$xdg-desktop-portal-wlr
                       "/share/xdg-desktop-portal/portals")
                       #$wayland-environment-variables))))
    (stop #~(make-kill-destructor)))

   (shepherd-service
    (documentation "Screen sharing support for wlroots-based compositors.")
    (provision '(xdg-desktop-portal-wlr))
    (requirement '(xdg-desktop-portal wayland-display dbus))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append xdg-desktop-portal-wlr
                                     "/libexec/xdg-desktop-portal-wlr") "-rl" "DEBUG")
                #:environment-variables
                (cons* "XDG_CURRENT_DESKTOP=sway"
                       #$wayland-environment-variables))))
    (stop #~(make-kill-destructor)))

   (shepherd-service
    (documentation "Waybar desktop status bar daemon.")
    (provision '(waybar))
    (requirement '(wayland-display))
    (start #~(lambda _
               (fork+exec-command
                (list #$(file-append waybar "/bin/waybar"))
                #:environment-variables #$wayland-environment-variables)))
    (stop #~(make-kill-destructor))
    (actions
     (list (shepherd-action
            (name 'kick-dunst)
            (documentation "Tell waybar to update its Dunst status.")
            (procedure #~(lambda (waybar-pid . args)
                           ;; See magic constant defined in waybar.jsonc.
                           (kill waybar-pid (+ SIGRTMIN #$%waybar-dunst-signal))
                           #t))))))

   (let ((swayidle.conf
          (mixed-text-file "swayidle.conf"
            "lock '" wayland-screenlock-program "' \n"
            "unlock '" procps "/bin/pkill -x -USR1 swaylock'\n"
            "before-sleep '" elogind "/bin/loginctl lock-session'\n"
            "timeout 300 '" elogind "/bin/loginctl lock-session && "
            swayfx "/bin/swaymsg \"output * power off\"' "  ; no newline!
            "resume '" swayfx "/bin/swaymsg \"output * power on\"'\n"
            "timeout 600 '" elogind "/bin/loginctl suspend'\n")))
     (shepherd-service
      (documentation "Manage the screen when idle or locked.")
      (provision '(swayidle))
      (requirement '(wayland-display))
      (start #~(lambda _
                 (fork+exec-command
                  (list #$(file-append swayidle "/bin/swayidle") "-C" #$swayidle.conf)
                  #:environment-variables #$wayland-environment-variables)))
      (stop #~(make-kill-destructor))
      (actions
       (list (shepherd-configuration-action swayidle.conf)
             (shepherd-action
              (name 'idle)
              (documentation "Immediately enter idle state.")
              (procedure #~(lambda (swayidle-pid . args)
                             (kill swayidle-pid SIGUSR1)
                             #t)))))))))

(define home-wayland-desktop-service-type
  (service-type
   (name 'wayland-desktop)
   (description "Configure a Wayland-based desktop environment.")
   (extensions
    (list (service-extension home-profile-service-type home-wayland-packages)
          (service-extension home-xdg-configuration-files-service-type home-wayland-xdg-configs)
          (service-extension home-files-service-type home-wayland-files)
          (service-extension home-environment-variables-service-type home-wayland-environment)
          (service-extension home-pipewire-service-type (const #t))
          (service-extension home-shepherd-service-type home-wayland-shepherd-services)))))


;;; Gaming servicse

(define-configuration/no-serialization home-gaming-configuration
  (nvidia-driver? (boolean #f) "Adapt the installed packages for the
proprietary NVIDIA driver?"))

(define (gaming-packages config)
  (match-record config <home-gaming-configuration> (nvidia-driver?)
    (cons*
     prismlauncher
     (if nvidia-driver?
         ;; nvidia-system-monitor: Qt; installs "qnvsm" binary, but no .desktop file
         (list steam-nvidia nvidia-system-monitor)
         (list steam radeontop)))))

(define (gaming-xdg-configs config)
  `(("guix-gaming-channels/games.scm"
     ,(scheme-file "guix-gaming-credentials.scm"
        #~(begin
            (use-modules (ice-9 rdelim) (ice-9 popen))
            (define gog-credentials
              (let* ((pass (open-pipe* OPEN_READ "pass" "show" "software/games/gog"))
                     (password (read-line pass))
                     (username
                      (let loop ((line (read-line pass)))
                        (cond
                         ((eof-object? line)
                          (error "Could not find username in pass output"))
                         ((string-prefix? "username: " line)
                          (string-trim
                           (substring line (string-length "username:"))))
                         (else (loop (read-line pass)))))))
                (close-pipe pass)
                `((email ,username)
                  (password ,password))))
            (make-gaming-config
             `((gog ,gog-credentials))))))))

(define (gaming-environment config)
  `(("GUIX_SANDBOX_EXTRA_SHARES" .   ; mount savegame locations inside Steam container
     ,(string-join
       '("$HOME/savegames/banished=$HOME/.local/share/Steam/steamapps/compatdata/242920/pfx/drive_c/users/steamuser/Documents/Banished/Save"
         "$HOME/savegames/planetbase=$HOME/.local/share/Steam/steamapps/compatdata/403190/pfx/drive_c/users/steamuser/Documents/Planetbase"
         "$HOME/savegames/cities-skylines=$HOME/.local/share/Colossal Order/Cities_Skylines/Saves"
         "$HOME/savegames/surviving-mars=$HOME/.local/share/Surviving Mars/76561198130982912"
         "$HOME/savegames/colony-survival=$HOME/.local/share/Steam/steamapps/common/Colony Survival/gamedata/savegames"
         "$HOME/savegames/portal=$HOME/.local/share/Steam/steamapps/common/Portal/portal/save"
         "$HOME/savegames/spacechem=$HOME/.local/share/Zachtronics Industries/SpaceChem/save"
         "$HOME/savegames/tis-100=$HOME/.local/share/TIS-100/76561198130982912")
       ":"))))

(define home-gaming-service-type
  (service-type
   (name 'gaming)
   (description "Configure games and gaming platforms.")
   (default-value (home-gaming-configuration))
   (extensions
    (list (service-extension home-profile-service-type gaming-packages)
          (service-extension home-xdg-configuration-files-service-type gaming-xdg-configs)
          (service-extension home-environment-variables-service-type gaming-environment)))))


;; Personal Information Management (mail, calendar, contacts, etc)

(define-configuration/no-serialization home-pim-configuration
  (work? (boolean #f) "Configure only programs relevant for work?"))

(define (pim-packages config)
  "PIM programs and utilities."
  (match-record config <home-pim-configuration> (work?)
    (cons* vdirsyncer khal khard aerc lynx mutt_oauth2.py   ; lynx for HTML mail
           (if work? '() (list nheko signal-desktop newsboat)))))

(define (pim-xdg-configs config)
  "Configuration files for PIM programs."
  (match-record config <home-pim-configuration> (work?)
    `(("khal/config" ,(local-file "files/khal.conf"))
      ("khard/khard.conf" ,(local-file "files/khard.conf"))
      ("aerc/accounts.conf" ,(if work?
                                 (local-file "files/aerc/accounts.work.conf")
                                 (local-file "files/aerc/accounts.conf")))
      ("aerc/aerc.conf" ,(local-file "files/aerc/aerc.conf"))
      ("aerc/binds.conf" ,(local-file "files/aerc/binds.conf"))
      ("aerc/filters" ,(local-file "files/aerc/filters" #:recursive? #t))
      ;; I could also use the upstream catppuccin/aerc theme here (packaged as
      ;; catppuccin-aerc), but it's a bit too colourless for me.
      ("aerc/stylesets/catppuccin" ,(local-file "files/aerc/catppuccin.conf"))
      ("aerc/templates" ,(local-file "files/aerc/templates" #:recursive? #t))
      ("vdirsyncer/config" ,(if work?
                                (local-file "files/vdirsyncer.work.conf")
                                (local-file "files/vdirsyncer.conf")))
      ,@(if work? '()
            `(("newsboat/config" ,(local-file "files/newsboat.conf"))
              ("newsboat/config.catppuccin" ,catppuccin-newsboat))))))

(define (pim-cron-jobs config)
  "Periodic jobs to sync calendars and contacts."
  ;; To avoid popping up a password prompt every time these run,
  ;; gpg-agent needs a long-enough default-cache-ttl.
  (list #~(job "15 */4 * * *" #$(file-append vdirsyncer "/bin/vdirsyncer metasync"))
        #~(job "0,30 * * * *" #$(file-append vdirsyncer "/bin/vdirsyncer sync"))))

(define-public home-pim-service-type
  (service-type
   (name 'pim)
   (description "Install and configure Personal Information Management software.")
   (default-value (home-pim-configuration))
   (extensions
    (list (service-extension home-profile-service-type pim-packages)
          (service-extension home-xdg-configuration-files-service-type pim-xdg-configs)
          (service-extension home-mcron-service-type pim-cron-jobs)))))