{
  config,
  inputs,
  lib,
  pkgs,
  self,
  ...
}: {
  options.ar = {
    apps = {
      firefox.enable = lib.mkOption {
        description = "Firefox Web Browser.";
        default = config.ar.desktop.enable;
        type = lib.types.bool;
      };
      nicotine-plus.enable =
        lib.mkEnableOption "Nicotine+ Soulseek client.";
      podman.enable =
        lib.mkEnableOption "Podman for OCI container support.";
      steam.enable = lib.mkOption {
        description = "Valve's Steam for video games.";
        default = config.ar.desktop.steam.enable;
        type = lib.types.bool;
      };
      virt-manager.enable =
        lib.mkEnableOption "Virt-manager for virtual machines with TPM and EFI support.";
    };

    containers = {
      nixos = {
        audiobookshelf = {
          enable =
            lib.mkEnableOption "audiobookshelf audiobook and podcast server in NixOS container.";
          mediaDirectory = lib.mkOption {
            description = "Media directory for audiobookshelf.";
            default = "/mnt/Media";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for audiobookshelf.";
            default = 13378;
            type = lib.types.int;
          };
        };
        navidrome = {
          enable =
            lib.mkEnableOption "Navidrome music server in NixOS container.";
          musicDirectory = lib.mkOption {
            description = "Music directory for Navidrome.";
            default = "/mnt/Media/Music";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for Navidrome.";
            default = 4533;
            type = lib.types.int;
          };
        };
      };
      oci = {
        audiobookshelf = {
          enable =
            lib.mkEnableOption "audiobookshelf podcast and audiobook server in OCI container.";
          mediaDirectory = lib.mkOption {
            description = "Media directory for audiobookshelf.";
            default = "/mnt/Media";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for audiobookshelf.";
            default = 13378;
            type = lib.types.int;
          };
        };
        freshRSS = {
          enable =
            lib.mkEnableOption "FreshRSS news client in OCI container.";
          port = lib.mkOption {
            description = "Port for FreshRSS.";
            default = 8080;
            type = lib.types.int;
          };
        };
        jellyfin = {
          enable =
            lib.mkEnableOption "Jellyfin media server in OCI container.";
          archiveDirectory = lib.mkOption {
            description = "Archive directory for Jellyfin.";
            default = "/mnt/Archive";
            type = lib.types.str;
          };
          mediaDirectory = lib.mkOption {
            description = "Media directory for Jellyfin.";
            default = "/mnt/Media";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for Jellyfin.";
            default = 8096;
            type = lib.types.int;
          };
        };
        plexMediaServer = {
          enable =
            lib.mkEnableOption "Plex Media Server in OCI container.";
          archiveDirectory = lib.mkOption {
            description = "Archive directory for Plex Media Server.";
            default = "/mnt/Archive";
            type = lib.types.str;
          };
          mediaDirectory = lib.mkOption {
            description = "Media directory for Plex Media Server.";
            default = "/mnt/Media";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for Plex Media Server.";
            default = 32400;
            type = lib.types.int;
          };
        };
        transmission = {
          enable =
            lib.mkEnableOption "Transmission Bittorrent client in OCI container.";
          archiveDirectory = lib.mkOption {
            description = "Archive directory for Transmission.";
            default = "/mnt/Archive";
            type = lib.types.str;
          };
          bitTorrentPort = lib.mkOption {
            description = "Port for BitTorrent p2p services..";
            default = 5143;
            type = lib.types.int;
          };
          mediaDirectory = lib.mkOption {
            description = "Media directory for Transmission.";
            default = "/mnt/Media";
            type = lib.types.str;
          };
          port = lib.mkOption {
            description = "Port for Transmission.";
            default = 9091;
            type = lib.types.int;
          };
        };
      };
    };
    desktop = {
      enable =
        lib.mkEnableOption "Enable basic GUI X11 and Wayland environment.";
      cinnamon.enable =
        lib.mkEnableOption "Cinnamon desktop session.";
      gnome = {
        enable =
          lib.mkEnableOption "GNOME desktop session.";
        fprintdFix.enable =
          lib.mkEnableOption
          "Fix fprintd & pam issues with GNOME Display Manager.";
      };
      greetd = {
        enable =
          lib.mkEnableOption "Greetd display manager.";

        autologin = {
          enable = lib.mkOption {
            description = "Whether to enable autologin.";
            default = false;
            type = lib.types.bool;
          };
          user = lib.mkOption {
            description = "User to autologin.";
            default = "aly";
            type = lib.types.str;
          };
        };
        session = lib.mkOption {
          description = "Default command to execute on login.";
          default = lib.getExe config.programs.hyprland.package;
          type = lib.types.str;
        };
      };
      hyprland.enable =
        lib.mkEnableOption "Hyprland wayland session.";
      lightdm.enable =
        lib.mkEnableOption
        "Lightdm and slick greeter with Catppuccin theme.";
      plasma.enable =
        lib.mkEnableOption "Plasma desktop session.";
      steam.enable =
        lib.mkEnableOption "Steam + Gamescope session.";
      sway.enable =
        lib.mkEnableOption "Sway wayland session.";
    };

    services = {
      binaryCache.enable = lib.mkEnableOption "nixpkgs cache server.";
      flatpak.enable =
        lib.mkEnableOption "Flatpak support with GUI.";
      ollama = {
        enable = lib.mkEnableOption "Ollama interface for LLMs.";
        listenAddress = lib.mkOption {
          description = "Listen Address for Ollama.";
          default = "127.0.0.1:11434";
          type = lib.types.str;
        };
        gpu = lib.mkOption {
          description = "Type of GPU for enabling GPU acceleration.";
          default = null;
          type = lib.types.str;
        };
      };
      syncthing = {
        enable = lib.mkEnableOption "Syncthing sync service.";
        user = lib.mkOption {
          description = "Specify user Syncthing runs as.";
          default = "aly";
          type = lib.types.str;
        };
        syncMusic = lib.mkOption {
          description = "Whether to sync music folder.";
          default = config.ar.services.syncthing.enable;
          type = lib.types.bool;
        };
        musicPath = lib.mkOption {
          description = "Whether to sync music folder.";
          default = "/home/${config.ar.services.syncthing.user}/music";
          type = lib.types.str;
        };
      };
      tailscale.enable = lib.mkEnableOption "Tailscale WireGuard VPN.";
    };
    base = {
      enable =
        lib.mkEnableOption "Basic system configuration and sane defaults.";
      sambaAutoMount = lib.mkOption {
        description = "Automounting of mauville Samba Shares.";
        default =
          config.ar.services.tailscale.enable && !(config.networking.hostName == "mauville");
        type = lib.types.bool;
      };
      plymouth.enable = lib.mkOption {
        description = "Plymouth boot screen with catppuccin theme.";
        default = config.ar.base.enable;
        type = lib.types.bool;
      };
      zramSwap = {
        enable = lib.mkOption {
          description = "zram swap.";
          default = config.ar.base.enable;
          type = lib.types.bool;
        };
        size = lib.mkOption {
          description = "zram swap size relative to RAM.";
          default = 50;
          type = lib.types.int;
        };
      };
    };

    users = {
      aly = {
        enable = lib.mkEnableOption "Aly's user.";

        manageHome = lib.mkOption {
          description = "Whether to enable aly's home directory.";
          type = lib.types.bool;
          default = config.ar.users.aly.enable;
        };

        password = lib.mkOption {
          description = "Hashed password for aly.";
          type = lib.types.str;
        };
      };

      dustin = {
        enable = lib.mkEnableOption "Dustin's user.";

        manageHome = lib.mkOption {
          description = "Whether to manage dustin's home directory.";
          type = lib.types.bool;
          default = config.ar.users.dustin.enable;
        };

        password = lib.mkOption {
          description = "Hashed password for dustin.";
          type = lib.types.str;
        };
      };

      morgan = {
        enable = lib.mkEnableOption "Morgan's user.";

        manageHome = lib.mkOption {
          description = "Whether to manage morgan's home directory.";
          type = lib.types.bool;
          default = config.ar.users.morgan.enable;
        };

        password = lib.mkOption {
          description = "Hashed password for morgan.";
          type = lib.types.str;
        };
      };
    };
  };
}