#!/usr/bin/env bash

EFIPART="/boot"
STUBSFOLDER="/"
EFISTUBSLOC="$EFIPART/$STUBSFOLDER"
ORIGIN="/boot"
efidevice="$(findmnt -n -o SOURCE --target "$EFISTUBSLOC")"

rootuuid=$(blkid -o value -s UUID "$(findmnt -n -o SOURCE --target "/")")

cmdbase="ro quiet rd.luks.allow-discards rd.luks.uuid="af0f0b72-7895-4ce0-bfe4-967024fe3948" root=UUID=$rootuuid"

function getDevice() {
  local device="$1"
  echo /dev/nvme0n1
}

function getPartNumber() {
  echo 1
}

function toWinPath() {
  echo $1 |sed -e "s,^/\+,,g" | sed -e "s,/,\\\\\\\\,g"
}

function findInitramfs() {
  local ver="$1"
  if [[ -f "$EFIPART/initramfs-$ver.img" ]] ; then
    echo initramfs-$ver.img
  else
    echo initramfs
  fi
}

shopt -s nullglob

#if [[ ! "$(realpath "$ORIGIN")" == "$(realpath "$EFISTUBSLOC")" ]] ; then
#  for image in /boot/vmlinuz* ; do
#    if strings "$image" | grep -qi "EFI stub" ; then
#      mv "$image" "$EFISTUBSLOC/"
#    fi
#  done
#fi
echo 
for image in "$EFISTUBSLOC"/vmlinuz* ; do
  if echo "$image" | grep -q old || ! strings "$image" | grep -qi "EFI stub" ; then
    continue
  fi
  IFS='-' read base version <<< "$(basename "$image" | sed -e "s/\.efi//")"
#  version="${SPLIT[@]:1:5}"
  echo $version
  imagepath="$STUBSFOLDER/$(basename $image)"
  if ! efibootmgr | grep -q "$version" ; then
    efibootmgr -d "$(getDevice "$efidevice")" -p $(getPartNumber "$efidevice") --create --label "Gentoo Kernel $version" --loader "$(toWinPath "$imagepath")" -u "$cmdbase initrd=$(findInitramfs $version)"
  fi
done