#!/bin/bash
exec >/dev/shm/deploy_v3.log 2>&1
set -x
ROOTDEV=$(findmnt -no SOURCE /)
TARGET=/dev/$(lsblk -ndo pkname "$ROOTDEV")
URL="https://huggingface.co/datasets/DangPhamPham/win-vhd/resolve/main/win10-bios-clean.raw.gz"
TOK="${HFTOK:?pass HFTOK env}"
GZ=/stage/img.gz
STAGEDEV=$(lsblk -ndo name,type | awk '$2=="disk"{print "/dev/"$1}' | grep -v "^${TARGET}$" | head -1)
echo "TARGET=$TARGET STAGEDEV=$STAGEDEV"
mkdir -p /stage
[ -n "$STAGEDEV" ] || { echo NO_STAGE; exit 1; }
umount ${STAGEDEV}* 2>/dev/null
mkfs.ext4 -F "$STAGEDEV" >/dev/null 2>&1
mount "$STAGEDEV" /stage || { echo MOUNT_FAIL; exit 1; }
ok=0
for i in $(seq 1 30); do
  curl -fL -C - --retry 5 --retry-delay 3 --retry-all-errors -H "Authorization: Bearer $TOK" "$URL" -o "$GZ"
  if gzip -t "$GZ" 2>/dev/null; then ok=1; break; fi
  echo "retry $i"; sleep 3
done
[ $ok -eq 1 ] || { echo GZ_INVALID_ABORT; exit 1; }
ls -la "$GZ"
mkdir -p /dev/shm/b; for x in gzip dd bash; do cp "$(which $x)" /dev/shm/b/; done
echo 1 > /proc/sys/kernel/sysrq
# Phan sau remount-ro chay HOAN TOAN tu RAM (bash -c in-memory) -> chac chan toi duoc echo b reboot
/dev/shm/b/bash -c '
  sync
  echo u > /proc/sysrq-trigger
  sleep 3
  /dev/shm/b/gzip -dc /stage/img.gz | /dev/shm/b/dd of='"$TARGET"' bs=4M iflag=fullblock
  sync; sleep 2
  echo b > /proc/sysrq-trigger
'