{pkgs, ...}: let
  # 1. The Brain: Logic to find a window or launch a new one
  hakase-launch-or-focus = pkgs.writeShellScriptBin "hakase-launch-or-focus" ''
    if (($# == 0)); then
      echo "Usage: hakase-launch-or-focus [window-pattern] [launch-command]"
      exit 1
    fi

    WINDOW_PATTERN="$1"
    # Escaped Nix interpolation for shell default value logic
    LAUNCH_COMMAND="''${2:-"uwsm-app -- $WINDOW_PATTERN"}"

    # Locate window address via hyprctl and jq
    WINDOW_ADDRESS=$(${pkgs.hyprland}/bin/hyprctl clients -j | ${pkgs.jq}/bin/jq -r --arg p "$WINDOW_PATTERN" \
      '.[] | select((.class | test("\\b" + $p + "\\b"; "i")) or (.title | test("\\b" + $p + "\\b"; "i"))) | .address' | head -n1)

    if [[ -n $WINDOW_ADDRESS ]]; then
      # If found, focus the existing window
      ${pkgs.hyprland}/bin/hyprctl dispatch focuswindow "address:$WINDOW_ADDRESS"
    else
      # If not found, execute the launch command
      eval exec setsid $LAUNCH_COMMAND
    fi
  '';

  hakase-launch-tui = pkgs.writeShellScriptBin "hakase-launch-tui" ''
    APP_NAME=$(basename "$1")
    # Using org.hakase prefix so the focus script can find it via class name
    exec setsid uwsm-app -- xdg-terminal-exec --app-id=org.hakase."$APP_NAME" -e "$@"
  '';

  hakase-focus-wrapper = pkgs.writeShellScriptBin "hakase-focus-wrapper" ''
    APP_NAME=$(basename "$1")
    WINDOW_PATTERN="org.hakase.$APP_NAME"
    LAUNCH_CMD="hakase-launch-tui $*"

    exec hakase-launch-or-focus "$WINDOW_PATTERN" "$LAUNCH_CMD"
  '';

  hakase-launch-wifi = pkgs.writeShellScriptBin "hakase-launch-wifi" ''
    # Unblock the WiFi radio (requires appropriate user groups/permissions)
    ${pkgs.util-linux}/bin/rfkill unblock wifi

    # Use the focus wrapper to launch or switch to Impala
    exec hakase-focus-wrapper impala
  '';

  hakase-launch-bluetooth =
    pkgs.writeShellScriptBin "hakase-launch-bluetooth"
    ''
      ${pkgs.util-linux}/bin/rfkill unblock wifi
        exec hakase-focus-wrapper bluetui
    '';
in {
  environment.systemPackages = [
    pkgs.jq
    pkgs.util-linux # Provides rfkill
    pkgs.bluetui
    pkgs.impala
    pkgs.wiremix
    pkgs.pamixer
    hakase-launch-or-focus
    hakase-launch-tui
    hakase-focus-wrapper
    hakase-launch-wifi
    hakase-launch-bluetooth
  ];
}