{
  lib,
  config,
  pkgs,
  ...
}:
with lib;
let
  fhsEnv =
    let
      base = pkgs.appimageTools.defaultFhsEnvArgs;
    in
    pkgs.buildFHSEnv (
      base
      // {
        name = "fhs";
        targetPkgs =
          pkgs:
          (base.targetPkgs pkgs)
          ++ (with pkgs; [
            pkg-config
            ncurses
            icu
          ]);
        profile = "export FHS=1";
        runScript = "bash";
        extraOutputsToInstall = [ "dev" ];
      }
    );
in
{
  options.features.base = {
    enable = mkEnableOption "enable shared base programs";
    preset = mkOption {
      type = types.enum [
        "minimal"
        "standard"
        "full"
      ];
      default = "standard";
      description = "Preset for desktop package groups.";
    };
    udevEnable = mkOption {
      type = types.bool;
      default = true;
      description = "Enable custom udev rules and device packages.";
    };
    mimeEnable = mkOption {
      type = types.bool;
      default = true;
      description = "Enable Home Manager MIME defaults.";
    };
    packages = {
      communicationEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install communication desktop apps.";
      };
      mediaEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install media apps.";
      };
      browsersEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install browsers.";
      };
      captureEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install screen capture tools.";
      };
      creativeEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install conversion/creative tools.";
      };
      devDesktopEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install desktop dev helper tools and VMs.";
      };
      dbeaverEnable = mkOption {
        type = types.bool;
        default = true;
        description = "Install dbeaver and FHS shell.";
      };
    };
  };

  config = mkMerge [
    (mkIf (config.features.base.preset == "minimal") {
      features.base.packages.communicationEnable = mkDefault false;
      features.base.packages.mediaEnable = mkDefault false;
      features.base.packages.browsersEnable = mkDefault true;
      features.base.packages.captureEnable = mkDefault false;
      features.base.packages.creativeEnable = mkDefault false;
      features.base.packages.devDesktopEnable = mkDefault false;
      features.base.packages.dbeaverEnable = mkDefault false;
    })

    (mkIf (config.features.base.preset == "full") {
      features.base.packages.communicationEnable = mkDefault true;
      features.base.packages.mediaEnable = mkDefault true;
      features.base.packages.browsersEnable = mkDefault true;
      features.base.packages.captureEnable = mkDefault true;
      features.base.packages.creativeEnable = mkDefault true;
      features.base.packages.devDesktopEnable = mkDefault true;
      features.base.packages.dbeaverEnable = mkDefault true;
    })

    (mkIf config.features.base.enable {
      services.udev = mkIf config.features.base.udevEnable {
        extraRules = ''
          KERNEL=="ttyACM0", MODE:="666"
          ACTION=="add", KERNEL=="sd[a-e][0-9]", ENV{ID_FS_UUID}=="3039-3932", RUN+="${pkgs.systemd}/bin/systemd-mount --no-block -A -G -o gid=users,fmask=113,dmask=002 /dev/%k /mnt/sdcard"
          ACTION=="add", KERNEL=="sd[a-e]", ENV{ID_FS_UUID}=="66BA-4EBA", RUN+="${pkgs.systemd}/bin/systemd-mount --no-block -A -G -o gid=users,fmask=113,dmask=002 /dev/%k /mnt/kobo"
          KERNEL=="uinput", GROUP="input", MODE="0660", OPTIONS+="static_node=uinput"
        '';
        packages = with pkgs; [
          vial
          via
        ];
      };

      home-manager.users.fw = mkIf config.features.base.mimeEnable {
        xdg.mimeApps = {
          enable = true;
          defaultApplications = {
            "text/html" = "librewolf.desktop";
            "x-scheme-handler/http" = "librewolf.desktop";
            "x-scheme-handler/https" = "librewolf.desktop";
            "x-scheme-handler/about" = "librewolf.desktop";
            "x-scheme-handler/unknown" = "librewolf.desktop";
            "text/plain" = "nvim.desktop";
            "text/markdown" = "nvim.desktop";
            "text/x-markdown" = "nvim.desktop";
            "application/json" = "nvim.desktop";
            "application/x-ndjson" = "nvim.desktop";
            "application/x-yaml" = "nvim.desktop";
            "text/yaml" = "nvim.desktop";
            "text/x-shellscript" = "nvim.desktop";
            "text/x-python" = "nvim.desktop";
            "text/x-csrc" = "nvim.desktop";
            "text/x-c++src" = "nvim.desktop";
            "application/x-sql" = "nvim.desktop";
            "text/xml" = "nvim.desktop";
            "application/xml" = "nvim.desktop";
            "application/pdf" = "org.gnome.Evince.desktop";
            "image/jpeg" = "feh.desktop";
            "image/png" = "feh.desktop";
            "image/gif" = "feh.desktop";
            "image/webp" = "feh.desktop";
            "image/tiff" = "feh.desktop";
            "image/bmp" = "feh.desktop";
            "image/svg+xml" = "feh.desktop";
          };
        };
      };

      environment.sessionVariables.DEFAULT_BROWSER = "${pkgs.librewolf}/bin/librewolf";

      environment.systemPackages =
        (with pkgs; [
          codex
          ipcalc
          remmina
          brightnessctl
          speedcrunch
          lagrange
          jujutsu
          rclone
          zathura
          feh
          pavucontrol
          pulseaudio
          devour
          caligula
          ptouch-print
        ])
        ++ optionals config.features.base.packages.communicationEnable (
          with pkgs;
          [
            signal-desktop
            thunderbird
            discord
            slack
          ]
        )
        ++ optionals config.features.base.packages.mediaEnable (
          with pkgs;
          [
            feishin
            spotify
            mpv
          ]
        )
        ++ optionals config.features.base.packages.browsersEnable (
          with pkgs;
          [
            librewolf
            firefox
          ]
        )
        ++ optionals config.features.base.packages.captureEnable (
          with pkgs;
          [
            wf-recorder
            slurp
          ]
        )
        ++ optionals config.features.base.packages.creativeEnable (
          with pkgs;
          [
            yt-dlp
            imagemagick
            pandoc
            pinta
            pastel
            ffmpeg
          ]
        )
        ++ optionals config.features.base.packages.devDesktopEnable (
          with pkgs;
          [
            vscode
            opencode
            quickemu
            virt-viewer
            go-passbolt-cli
            bitwarden-desktop
            bitwarden-cli
          ]
        )
        ++ optionals config.features.base.packages.dbeaverEnable (
          with pkgs;
          [
            dbeaver-bin
            fhsEnv
          ]
        );
    })
  ];
}