Add zsh completions

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/gui/theme/theme.sh

@@ -10,15 +10,6 @@ set_wallpaper() {
   fi
 }
 
-set_mode() {
-  if [[ "$1" = "light" ]] || [[ "$1" = "dark" ]]; then
-    MODE="$1"
-  else
-    echo "Invalid mode: $1. Use 'light' or 'dark'."
-    exit 1
-  fi
-}
-
 toggle_mode() {
   if [[ "$(cat "${CONFIG}"/mode)" = "light" ]]; then
     MODE="dark"
@@ -28,7 +19,7 @@ toggle_mode() {
 }
 
 show_usage() {
-  echo "Usage: theme {toggle|light|dark|mode <mode>|wallpaper <file> [mode]}"
+  echo "Usage: theme [-m {light|dark|toggle}] [-w <file>]"
 }
 
 finish() {
@@ -39,56 +30,31 @@ finish() {
   "${RELOAD}" > /dev/null
 }
 
-if [[ $# -eq 0 ]]; then
-  finish
-else
-  case "$1" in
-    toggle)
-      if [[ $# -eq 1 ]]; then
-        toggle_mode
-      else
-        show_usage
-        exit 1
-      fi
+# Parse arguments
+while getopts "m:w:" opt; do
+  case "$opt" in
+    m)
+      case "$OPTARG" in
+        light|dark)
+          MODE="$OPTARG"
+          ;;
+        toggle)
+          toggle_mode
+          ;;
+        *)
+          show_usage
+          exit 1
+          ;;
+      esac
       ;;
-    light)
-      if [[ $# -eq 1 ]]; then
-        set_mode "light"
-      else
-        show_usage
-        exit 1
-      fi
-      ;;
-    dark)
-      if [[ $# -eq 1 ]]; then
-        set_mode "dark"
-      else
-        show_usage
-        exit 1
-      fi
-      ;;
-    mode)
-      if [[ $# -eq 2 ]]; then
-        set_mode "$2"
-      else
-        show_usage
-        exit 1
-      fi
-      ;;
-    wallpaper)
-      if [[ $# -ge 2 ]] && [[ $# -le 3 ]]; then
-        set_wallpaper "$2"
-        [[ $# -eq 3 ]] && set_mode "$3"
-      else
-        show_usage
-        exit 1
-      fi
+    w)
+      set_wallpaper "$OPTARG"
       ;;
     *)
       show_usage
       exit 1
       ;;
   esac
+done
 
-  finish
-fi
+finish