more robust logic for stylix theme picking

stylix.nix

@@ -5,27 +5,63 @@
   ...
 }:
 let
-  cfg = config.my.stylix;
-  mkScheme = color: name: polarity: image: {
-    inherit name polarity image;
-    iconPackage = pkgs.papirus-icon-theme.override { inherit color; };
-    base16Scheme = "${pkgs.base16-schemes}/share/themes/${name}.yaml";
-  };
-  schemes = {
-    who = mkScheme "orange" "catppuccin-frappe" "dark" ./wallpapers/Nikolay_Kasatkin_Who.jpeg;
-    jesus = mkScheme "red" "equilibrium-light" "light" ./wallpapers/jesus.png;
-    ballerinas = mkScheme "brown" "mocha" "dark" ./wallpapers/Waay-Ballerinas.jpeg;
-  };
   scheme = schemes.ballerinas;
+  cfg = config.my.stylix;
+  mkScheme =
+    {
+      color ? null,
+      name ? null,
+      polarity,
+      image,
+      iconPackage ? pkgs.papirus-icon-theme.override { inherit color; },
+    }:
+    {
+      inherit
+        name
+        polarity
+        image
+        iconPackage
+        ;
+      base16Scheme = if name != null then "${pkgs.base16-schemes}/share/themes/${name}.yaml" else null;
+    };
+  schemes = {
+    who = mkScheme {
+      name = "catppuccin-frappe";
+      polarity = "dark";
+      image = ./wallpapers/Nikolay_Kasatkin_Who.jpeg;
+      iconPackage = pkgs.catppuccin-papirus-folders.override {
+        flavor = "frappe";
+        accent = "peach";
+      };
+    };
+    space = mkScheme {
+      name = "solarflare";
+      color = "carmine";
+      polarity = "dark";
+      image = ./wallpapers/space.jpg;
+    };
+    jesus = mkScheme {
+      color = "red";
+      name = "equilibrium-light";
+      polarity = "light";
+      image = ./wallpapers/jesus.png;
+    };
+    ballerinas = mkScheme {
+      color = "brown";
+      name = "mocha";
+      polarity = "dark";
+      image = ./wallpapers/Waay-Ballerinas.jpeg;
+    };
+  };
 in
 {
   options.my.stylix.enable = lib.mkEnableOption "enable";
   config = {
     stylix = {
-      inherit (scheme) image polarity base16Scheme;
+      inherit (scheme) image polarity;
       enable = cfg.enable;
       targets.qt.platform = lib.mkForce "qtct";
-    };
+    } // lib.optionalAttrs (scheme ? base16Scheme) { inherit (scheme) base16Scheme; };
     home-manager.users.jawz = {
       gtk = lib.mkIf (!cfg.enable) {
         iconTheme = scheme.iconPackage;