{ config, lib, pkgs, ... }:
with lib;
let
  cfg = config.programs.musicutil;
  yamlFormat = pkgs.formats.yaml { };
  optionalPackage = opt:
    optional (opt != null && opt.package != null) opt.package;

in {
  options = {
    programs.musicutil = {
      enable = mkOption {
        type = types.bool;
        default = false;
      };

      package = mkOption {
        type = types.nullOr types.package;
        default = null;
      };

      settings = {
        logLevel = mkOption {
          type = types.str;
          default = "info";
        };
      };
    };
  };

  config = mkIf cfg.enable {
    home.packages = optionalPackage cfg.package;

    xdg.configFile."musicutil.yaml".source =
      yamlFormat.generate "musicutil-config" cfg.settings;
  };
}