#!/bin/bash
# Reparer GRUB depuis une cle USB live
# Usage: sudo bash fix-grub-live.sh
set -e

DISK=""
for d in /dev/sda /dev/nvme0n1 /dev/sdb /dev/vda; do
  if [ -b "$d" ] && [ "$(cat /sys/block/$(basename $d)/removable 2>/dev/null)" = "0" ]; then
    DISK="$d"
    break
  fi
done
[ -n "$1" ] && DISK="$1"
[ -z "$DISK" ] && { echo "Aucun disque detecte. Usage: $0 /dev/sdX"; exit 1; }

if [[ "$DISK" == *"nvme"* ]]; then
  P="${DISK}p"
else
  P="${DISK}"
fi

echo "=== Reparation GRUB sur $DISK ==="

# Monter
mount "${P}2" /mnt
mount "${P}1" /mnt/boot/efi
for d in dev dev/pts proc sys run; do mount --bind /$d /mnt/$d; done

# Installer git + fonts, cloner le repo, installer theme + GRUB
chroot /mnt bash -c '
  apt update -qq
  apt install -y -qq git grub-efi-amd64 fonts-dejavu-core
  [ -d /home/jules/photobooth ] || git clone https://git.copydev.fr/jules/photobooth.git /home/jules/photobooth
  cd /home/jules/photobooth && git pull
  bash scripts/install-grub-theme.sh
  grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=debian --recheck
'

# Nettoyer
umount -R /mnt

echo ""
echo "=== GRUB repare ! Retirer la cle et rebooter ==="