{
  pkgs,
  lib,
  config,
  ...
}:
with lib;
let
  cfg = config.home.steam;
  persist = [
    ".steam"
    ".local/share/Steam"
  ];
in
{
  imports = [ ./config.nix ];

  options.home.steam = {
    enable = mkEnableOption "steam software and environment";
    package = mkOption {
      type = with types; package;
      default = config.programs.steam.package;
      description = "steam package";
    };
    allUsers = mkEnableOption "set up for all users";
  };

  config = {
    users.homeModules = [
      # this module passes steam configuration to home-manager
      { passthrough.steam = cfg; }
    ];

    users.home.persist.directories = with cfg; mkIf (enable && allUsers) persist;
    users.home.persistApp.directories = with cfg; mkIf (enable && !allUsers) persist;
  };
}