#!/bin/sh
echo "[AUTO-INSTALL] Starting headless Ubuntu network install..."

SERVER="http://192.168.x.x"  # replace with your LAN IP
IMG_URL="$SERVER/ubuntu/noble-preinstalled-server-arm64+raspi.img.xz"
USERDATA_URL="$SERVER/ubuntu/autoinstall/user-data"
METADATA_URL="$SERVER/ubuntu/autoinstall/meta-data"
DEVICE="/dev/mmcblk0"

echo "[AUTO-INSTALL] Waiting for network..."
for i in $(seq 1 30); do
  ping -c1 1.1.1.1 >/dev/null 2>&1 && break
  sleep 2
done

echo "[AUTO-INSTALL] Downloading Ubuntu image..."
mkdir -p /mnt/work
cd /mnt/work
wget -q "$IMG_URL" -O ubuntu.img.xz

echo "[AUTO-INSTALL] Writing image to SD card..."
xz -d < ubuntu.img.xz | dd of=$DEVICE bs=4M status=progress conv=fsync

sync
sleep 3

BOOT_PART="${DEVICE}p1"
mkdir -p /mnt/boot
mount $BOOT_PART /mnt/boot || mount ${DEVICE}1 /mnt/boot
mkdir -p /mnt/boot/autoinstall
wget -q "$USERDATA_URL" -O /mnt/boot/autoinstall/user-data
wget -q "$METADATA_URL" -O /mnt/boot/autoinstall/meta-data

sync
umount /mnt/boot
echo "[AUTO-INSTALL] Install complete. Powering off."
poweroff -f