{ lib, ... }:
let
  inherit (lib) mkEnableOption 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));
        };
      };
    });

  commonOptions = {
    enable = mkEnableOption "Oh My Posh";
  };

  userOptions = commonOptions // {
    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 = {
      programs.oh-my-posh = commonOptions;

      users = mkOption {
        type = types.attrsOf (types.submodule (
          { ... }: {
            options = {
              programs.oh-my-posh = userOptions;
            };
          }));
      };
    };
  };
}