{ config, lib, pkgs, flakeRoot, ... }:
let
  cfg = config.programs.hyprscrolling;
  defaultPluginPkg = (pkgs.hyprlandPlugins.hyprscrolling or null);
  # Stable paths (avoid pinning /nix/store/... in your hyprland.conf)
  stableSoPath = "/etc/hypr/plugins/libhyprscrolling.so";
  dropInConfPath = "/etc/hypr/conf.d/90-hyprscrolling.conf";
  # Read drop-in config from your repo (flake root)
  dropInConfSourcePath = flakeRoot + "/assets/conf/desktop/hypr/hyprscrolling.conf";
  dropInConf = builtins.readFile dropInConfSourcePath;
in
{
  options.programs.hyprscrolling = {
    enable = lib.mkEnableOption "Hyprland hyprscrolling (scrolling layout) plugin (NixOS-friendly)";
    pluginPackage = lib.mkOption {
      type = lib.types.nullOr lib.types.package;
      default = defaultPluginPkg;
      description = ''
        Package that provides the hyprscrolling plugin.
        Defaults to pkgs.hyprlandPlugins.hyprscrolling when available.
      '';
    };
    # Where we install the generated config snippet (so you can `source = ...` it)
    dropInPath = lib.mkOption {
      type = lib.types.str;
      default = dropInConfPath;
      description = "Path to the Hyprland drop-in config file (needs to be sourced by your hyprland.conf).";
    };
    # Where we install a stable symlink to the plugin .so
    stablePluginSoPath = lib.mkOption {
      type = lib.types.str;
      default = stableSoPath;
      description = "Stable path for the plugin shared object (symlinked to the Nix store).";
    };
  };
  config = lib.mkIf cfg.enable {
    assertions = [
      {
        assertion = cfg.pluginPackage != null;
        message = ''
          Could not find hyprscrolling plugin package in this nixpkgs.
          Set programs.hyprscrolling.pluginPackage explicitly (e.g. pkgs.hyprlandPlugins.hyprscrolling).
        '';
      }
    ];
    environment.systemPackages = [ cfg.pluginPackage ];
    environment.etc."hypr/plugins/libhyprscrolling.so".source =
      "${cfg.pluginPackage}/lib/libhyprscrolling.so";
    # Now /etc/hypr/conf.d/90-hyprscrolling.conf is exactly your file’s contents
    environment.etc."hypr/conf.d/90-hyprscrolling.conf".text = dropInConf;
  };
}