{ lib, config, pkgs, flakeRoot, ... }:

let
  # --- Program definition ---
  programName = "stylix";

  # Assets (theme + wallpaper)
  programAssets = "${flakeRoot}/assets/system/theming/${programName}";
  programFiles =
    if builtins.pathExists programAssets
    then builtins.readDir programAssets
    else {};
  files = lib.genAttrs (builtins.attrNames programFiles) (name: {
    src = "${programAssets}/${name}";
  });

  # Enable toggle (must match option)
  enableProgram = config.enableStylix or true;

  # Resolve user safely (outside mkIf)
  user = config.defaultUser or "henrov";

  # --- Stylix configuration (self-contained) ---
  stylixCfg = {
    enable = true;

    base16Scheme =
      "${flakeRoot}/assets/system/theming/stylix/catppuccin-mocha.yaml";

    image =
      "${flakeRoot}/assets/hyprland/wallpaperstuff/pictures/wall1.jpg";

    polarity = "dark";

    cursor = {
      package = pkgs.phinger-cursors;
      name = "phinger-cursors-light";
      size = 24;
    };

    fonts = {
      monospace = {
        package = pkgs.nerd-fonts.fira-code;
        name = "Fira Code Nerd Font";
      };
      sansSerif = {
        package = pkgs.lato;
        name = "Lato";
      };
    };

    icons = {
      enable = true;
      package = pkgs.papirus-icon-theme;
      dark = "Papirus-Dark";
      light = "Papirus-Light";
    };
  };
in
{
  # --- Option ---
  options.enableStylix =
    lib.mkEnableOption "Enable Stylix system theming";

  # --- Config ---
  config = lib.mkIf enableProgram {

    # --- Dendritic app definition ---
    myApps.${programName} = {
      enable = true;
      assetsDir = programAssets;
      files = files;
      inherit user;

      theme = "catppuccin-mocha";
      polarity = "dark";
    };

    # --- Stylix theming ---
    stylix = stylixCfg;

    # --- Optional: wallpaper helper (kept dendritic) ---
    myApps.wallpaper = {
      enable = true;
      packages = [ "feh" "st" ];
    };

    # --- Cursor environment variables ---
    home-manager.users.${user}.home.sessionVariables = {
      XCURSOR_THEME    = stylixCfg.cursor.name;
      XCURSOR_SIZE     = toString stylixCfg.cursor.size;
      HYPRCURSOR_THEME = stylixCfg.cursor.name;
      HYPRCURSOR_SIZE  = toString stylixCfg.cursor.size;
    };
  };
}