# ncli/commands/switch.nix — Specialization switching
lib:

{}:

{
  switch_case = ''
    current=""
    if [ -f /etc/nixos-tags ]; then
      current=$(cat /etc/nixos-tags)
    fi

    if [ "$#" -ge 2 ]; then
      spec_name="$2"
      if [ -n "$current" ]; then
        echo "Already on specialization: $current. Cannot switch directly to '$spec_name'. Please reboot or return to default first."
      else
        if [ -d "/run/current-system/specialisation/$spec_name" ]; then
          echo "Switching to specialization: $spec_name"
          sudo /run/current-system/specialisation/"$spec_name"/bin/switch-to-configuration test
        else
          echo "Error: Specialization '$spec_name' not found."
          echo "Available specializations:"
          ls /run/current-system/specialisation/
        fi
      fi
    else
      if [ -n "$current" ]; then
        echo "Already on a specialization: $current. To switch, please reboot, or use 'sudo nixos-rebuild switch --flake .' to get back to default, and then switch after."
      else
        specs=$(ls /run/current-system/specialisation/)
        echo "Specializations available:"
        echo "$specs"
        echo ""
        echo "To switch to a specialization, run: 'ncli switch <tag>'"
      fi
    fi
    ;;
  '';
}