#!/bin/bash
set -e

# Add an EFI boot entry for the Nomarchy UKI, allowing the system to boot directly
# without a bootloader like Limine. Requires UEFI firmware and a built UKI.

if [[ ! -d /sys/firmware/efi ]]; then
  echo "Error: System is not booted in UEFI mode" >&2
  exit 1
fi

if ! efibootmgr &>/dev/null; then
  echo "Error: efibootmgr is not available or not functional" >&2
  exit 1
fi

if cat /sys/class/dmi/id/bios_vendor 2>/dev/null | grep -qi "American Megatrends"; then
  echo "Error: American Megatrends firmware may not safely support custom EFI entries" >&2
  exit 1
fi

if cat /sys/class/dmi/id/bios_vendor 2>/dev/null | grep -qi "Apple"; then
  echo "Error: Apple firmware uses its own boot manager" >&2
  exit 1
fi

uki_file=$(find /boot/EFI/Linux/ -name "nomarchy*.efi" -printf "%f\n" 2>/dev/null | head -1)

if [[ -z $uki_file ]]; then
  echo "Error: No Nomarchy UKI found in /boot/EFI/Linux/" >&2
  exit 1
fi

boot_source=$(findmnt -n -o SOURCE /boot)
disk=$(echo "$boot_source" | sed 's/p\?[0-9]*$//')
part=$(echo "$boot_source" | grep -o 'p\?[0-9]*$' | sed 's/^p//')

if gum confirm "Setup direct boot (so snapshot booting must be done via bios)?"; then
  echo "Creating EFI boot entry for $uki_file"

  sudo efibootmgr --create \
    --disk "$disk" \
    --part "$part" \
    --label "Nomarchy" \
    --loader "\\EFI\\Linux\\$uki_file"
fi