#!/bin/bash

__find_esp__() {
  local parttype
  local fstype
  local device

  while read -r device; do
    read -r parttype fstype ESP <<<"$(lsblk -o "PARTTYPE,FSTYPE,MOUNTPOINT" "$device" 2>/dev/null | awk 'NR==2')"

    [[ "${parttype,,}" != "c12a7328-f81f-11d2-ba4b-00a0c93ec93b" ]] && continue
    [[ "${fstype,,}" != "vfat" ]] && continue
    [[ -z $(findmnt -sn "$ESP") ]] && continue

  done <<<"$(fdisk -l 2>/dev/null | grep -i efi | cut -d " " -f 1)"

  if [ -z "${ESP}" ]; then
    ESP=$(grep -i "/efi" /etc/fstab | awk '{print $2}')
    if [ -z "${ESP}" ]; then
      ESP=$(grep -i "/boot" /etc/fstab | awk '{print $2}')
      if [ -z "${ESP}" ]; then
        ESP=$(bootctl --print-esp-path)
        if [ -z "${ESP}" ]; then
          exit 1
        fi
      fi
    fi
  fi

  echo "Found ${ESP}"
  readonly ESP
}


__has_esp__() {
  __find_esp__

  mount "$ESP" &>/dev/null
  [[ -d "$ESP/EFI" ]] && return 0 || return 1
}


THEME_NAME="melawy-nier-a2"
install_dir="/usr/share/refind/themes"


echo "Searching rEFInd installation in EFI partition..."
if ! __has_esp__; then
  echo "EFI partition not found" >&2
  exit 1
fi


REFIND_DIR=$(find "${ESP}" -type d -iname refind)
if ! [[ -d "${REFIND_DIR}" ]]; then
  echo "rEFInd not installed in $ESP" >&2
  exit 1
fi
echo "Found rEFInd in ${REFIND_DIR}"


EFI_BOOT_DIR=$(find "$ESP" -type d -iname boot)
if ! [[ -d "${EFI_BOOT_DIR}" ]]; then
  EFI_BOOT_DIR=$(find "$ESP" -type d -iname Boot)
  if ! [[ -d "${EFI_BOOT_DIR}" ]]; then
    EFI_BOOT_DIR=$(find "$ESP" -type d -iname BOOT)
    if ! [[ -d "${EFI_BOOT_DIR}" ]]; then
      mkdir -p "$(dirname ${REFIND_DIR})/boot"
      EFI_BOOT_DIR="$(dirname ${REFIND_DIR})/boot"
    fi
  fi
fi


echo "Installing themes in ${REFIND_DIR}"

mkdir -p "${REFIND_DIR}/themes"
mkdir -p "${EFI_BOOT_DIR}/themes"

cp -vrf "${install_dir}/." "${REFIND_DIR}/themes/."
cp -vrf "${install_dir}/." "${EFI_BOOT_DIR}/themes/."

if [ -f "${REFIND_DIR}/refind_x64.efi" ]; then
  # Remove all from "${EFI_BOOT_DIR}" except "themes"
#   f_list=$(ls -1 "${EFI_BOOT_DIR}" | grep -v "themes")
#
#   for i in ${f_list[@]}
#   do
#     rm -vr "${EFI_BOOT_DIR}/${i}"
#   done
#
#   unset f_list

  # Copy all from "${REFIND_DIR}" to "${EFI_BOOT_DIR}" except "themes"
  f_list=$(ls -1 "${REFIND_DIR}" | grep -v "themes")

  for i in "${f_list[@]}"
  do
    if [ -f "${REFIND_DIR}/${i}" ]; then
      cp -vf "${REFIND_DIR}/${i}" "${EFI_BOOT_DIR}/${i}"
    fi

    if [ -d "${REFIND_DIR}/${i}" ]; then
      cp -vrf "${REFIND_DIR}/${i}" "${EFI_BOOT_DIR}/${i}"
    fi
  done

  unset f_list

  cp -vf "${REFIND_DIR}/refind_x64.efi" "${EFI_BOOT_DIR}/bootx64.efi"
fi


REFIND_CONF_PATH="${REFIND_DIR}/refind.conf"

cp -vf "/etc/refind-menu-generator/refind.conf" "${REFIND_DIR}/refind.conf"

RESULT=$(grep "theme" "${REFIND_CONF_PATH}")

if [[ "$?" = "0" ]]; then
  CURRENT_THEME=$(echo "${RESULT}" | cut -d"/" -f2)
  if [[ "$?" == "0" ]]; then
    sed -e "s/${CURRENT_THEME}/${THEME_NAME}/g" -i "${REFIND_CONF_PATH}"
  fi
else
  if [[ -z "$(tail -n 1 -c 1 ${REFIND_CONF_PATH})" ]];then
    echo "include themes/${THEME_NAME}/theme.conf" >> "${REFIND_CONF_PATH}"
  else
    echo -e "\ninclude themes/${THEME_NAME}/theme.conf" >> "${REFIND_CONF_PATH}"
  fi
fi

cp -vf "${REFIND_DIR}/refind.conf" "${EFI_BOOT_DIR}/refind.conf"