{ config, lib, pkgs, ... }:

with lib;
let
  # Nixvim
  nixvim = import (builtins.fetchGit {
    url = "https://github.com/nix-community/nixvim";
  });

  # Stylix
  stylix = import (pkgs.fetchFromGitHub {
    owner = "danth";
    repo = "stylix";
    rev = "1ff9d37d27377bfe8994c24a8d6c6c1734ffa116";
    sha256 = "0dz8h1ga8lnfvvmvsf6iqvnbvxrvx3qxi0y8s8b72066mqgvy8y5";
  });

  # User configuration
  userModule = types.submodule {
    options = {
      sudo = mkOption {
        type = types.bool;
        default = false;
        example = true;
        description = "Whether the user is allowed sudo access.";
      };
      configuration = mkOption {
        type = types.path;
        default = ./users/base.nix;
        description = "What home manager configuration to use for this user.";
      };
      desktopInit = mkOption {
        type = types.lines;
        default = "";
        description = "Bash script to execute after initial log in.";
      };
    };
  };
in {
  imports = [
    # Import home manager
    <home-manager/nixos>

    # Import system configuration setup
    # ./system.nix
  ];

  options = {
    machine.users = mkOption {
      type = types.attrsOf userModule;
      default = {};
      description = "Users configured on this system.";
    };
  };

  config = {
    # Add required home manager modules
    home-manager.sharedModules = [
      # Stylix for theming
      stylix.homeManagerModules.stylix

      # Nixvim for neovim
      nixvim.homeManagerModules.nixvim

      # Modules
      ./modules/default.nix
    ];

    # Create users
    users.users = attrsets.concatMapAttrs (name: value: {
      ${name} = {
        isNormalUser = true;
        extraGroups = mkIf value.sudo [ "wheel" ];
      };
    }) config.machine.users;

    # Create home manager configuration for users
    home-manager.users = attrsets.concatMapAttrs (name: value: {
      ${name} = value.configuration;
    }) config.machine.users;
  };
}