#!/bin/sh
sync_theme() {
	# Get the current system theme
	theme=$(xfconf-query -c xsettings -p /Net/ThemeName)
	# Find the best match for the xfwm4 theme that corresponds with the current system theme
	xfwm4_theme=$(find /usr/share/themes/ /usr/local/share/themes/ "$HOME"/.themes/ "$HOME"/.local/share/themes/ -mindepth 2 -maxdepth 2 -type d -name xfwm4 -printf '%h\n' 2>/dev/null | grep -o "/${theme}[^/]*$" | sort | head -n1)
	# If a match is not found then use the Default theme
	[ -z "$xfwm4_theme" ] && xfwm4_theme='Default'
	# Apply the xfwm4 theme
	xfconf-query -c xfwm4 -p /general/theme -n -t string -s "${xfwm4_theme#/}"
	# Apply the current theme with gsettings
	gsettings set org.gnome.desktop.interface gtk-theme "$theme"
}

sync_icon_theme() {
	# Get the current icon theme
	icon_theme=$(xfconf-query -c xsettings -p /Net/IconThemeName)
	# Apply the same theme in qt5ct and qt6ct configuration
	sed -i "s/^icon_theme=.*$/icon_theme=$icon_theme/" "$HOME"/.config/qt5ct/qt5ct.conf
	sed -i "s/^icon_theme=.*$/icon_theme=$icon_theme/" "$HOME"/.config/qt6ct/qt6ct.conf
}

pidof -sq -o %PPID -x "$(basename "$0")" && exit
while :; do
	# Get the current system theme
	theme_new=$(xfconf-query -c xsettings -p /Net/ThemeName)
	# Get the current icon theme
	icon_theme_new=$(xfconf-query -c xsettings -p /Net/IconThemeName)
	# Get the current font name
	font_new=$(xfconf-query -c xsettings -p /Gtk/FontName)

	# Run sync_theme if the new system theme doesn't match the previous one
	[ "$theme_new" != "$theme_prev" ] && sync_theme
	# Run sync_icon_theme if the new icon theme doesn't match the previous one
	[ "$icon_theme_new" != "$icon_theme_prev" ] && sync_icon_theme
	# If the new font doesn't match the previous one, apply the new font for the title of xfce windows
	[ "$font_new" != "$font_prev" ] && xfconf-query -c xfwm4 -p /general/title_font -n -t string -s "$font_new"

	# The new values become the previous values
	theme_prev=$theme_new
	icon_theme_prev=$icon_theme_new
	font_prev=$font_new

	sleep 3
done