{ lib, config, ... }:

let
  # --- Module variables ---
  moduleName = "stylix";
  username   = config.defaultUser or "henrov";

  # Assets directory for Stylix config
  assetPath = ../../../assets/system/conf/${moduleName};

  # Read all config files
  programFiles = builtins.readDir assetPath;

  files = lib.genAttrs (builtins.attrNames programFiles) (name: {
    src = "${assetPath}/${name}";
  });

  # Top-level toggle for this module
  enableProgram = config.enableStylix or false;

  # Read the main stylix.conf
  stylixConfFile = "${assetPath}/stylix.conf";
  stylixConf     = if builtins.pathExists stylixConfFile
                    then builtins.readFile stylixConfFile
                    else "";

  # Default cursor values
  cursorName = "phinger-cursors-light";
  cursorSize = 24;

in
{
  # --- Top-level toggle ---
  options.enableStylix = lib.mkEnableOption "Enable Stylix system theming";

  # --- Only apply configuration if enabled ---
  config = lib.mkIf enableProgram {

    # Deploy Stylix configuration files to user's XDG config
    home-manager.users.${username}.xdg.configFile =
      lib.mapAttrs' (name: value: {
        name  = "${moduleName}/${name}";
        value.source = value.src;
      }) files;

    # Merge all session variables into a single map
    home-manager.users.${username}.home.sessionVariables = lib.mkMerge [
      {
        STYLIX_CONF = stylixConf;
      }
      {
        XCURSOR_THEME    = cursorName;
        XCURSOR_SIZE     = toString cursorSize;
        HYPRCURSOR_THEME = cursorName;
        HYPRCURSOR_SIZE  = toString cursorSize;
      }
    ];

    # Optional wallpaper helper packages (symbolic, install manually or via packages)
    environment.systemPackages = [
      "feh"
      "st"
    ];
  };
}