{ lib, ... }:
let
  inherit (lib) mkOption types;

  themeType = types.submodule (
    { config, ... }: {
      options = {
        source = mkOption {
          type = types.path;
          description = "The path to the oh-my-posh theme to use.";
        };

        name = mkOption {
          type = types.nullOr types.str;
          description = "The name of the theme.";
          default = lib.strings.removeSuffix ".omp" (lib.strings.removeSuffix ".json" (builtins.baseNameOf config.source));
        };
      };
    });

  ompType = types.submodule (
    { config, ... }: {
      options = {
        theme = mkOption {
          type = types.nullOr (types.either types.str themeType);
          description = "The default theme.";
          default = null;
        };

        additionalThemes = mkOption {
          type = types.listOf themeType;
          description = "A set of additional themes to install.";
          default = [ ];
        };
      };
    });
in {
  options = {
    valhalla.users = mkOption {
      type = types.attrsOf (types.submodule (
        { ... }: {
          options = {
            oh-my-posh = mkOption {
              type = ompType;
              description = "The Oh My Posh configuration to apply.";
              default = { };
            };
          };
        }));
    };
  };
}