{
  modules,
  self,
  getHelpers,
}:
{
  pkgs,
  config,
  lib,
  ...
}@args:
let
  inherit (lib)
    mkEnableOption
    mkOption
    mkOptionType
    mkForce
    mkMerge
    mkIf
    types
    ;
  helpers = getHelpers pkgs false;
  shared = import ./_shared.nix { inherit modules helpers; } args;
  cfg = config.programs.nixvim;
  files = shared.configFiles // {
    "nvim/sysinit.lua".text = cfg.initContent;
  };
in
{
  options = {
    programs.nixvim = mkOption {
      default = { };
      type = types.submoduleWith {
        shorthandOnlyDefinesConfig = true;
        specialArgs = {
          nixosConfig = config;
          inherit helpers;
        };
        modules = [
          {
            options = {
              enable = mkEnableOption "nixvim";
              defaultEditor = mkEnableOption "nixvim as the default editor";
            };
            config.wrapRc = mkForce true;
          }
        ] ++ shared.topLevelModules;
      };
    };
    nixvim.helpers = shared.helpers;
  };

  config = mkIf cfg.enable (mkMerge [
    {
      environment.systemPackages = [
        cfg.finalPackage
        cfg.printInitPackage
      ] ++ (lib.optional cfg.enableMan self.packages.${pkgs.stdenv.hostPlatform.system}.man-docs);
    }
    (mkIf (!cfg.wrapRc) {
      environment.etc = files;
      environment.variables."VIM" = "/etc/nvim";
    })
    {
      inherit (cfg) warnings assertions;
      programs.neovim.defaultEditor = cfg.defaultEditor;
      environment.variables.EDITOR = mkIf cfg.defaultEditor (lib.mkOverride 900 "nvim");
    }
  ]);
}