#!/usr/bin/env bash

# Copy this along with .not_logged_in_yet to armbian root dir, then run after successful login

# Refresh: extract MAC address of wlan0
MAC=$(netplan status -f json | jq -r '.wlan0.macaddress')

# Check that we actually got a MAC address
if [[ -z "$MAC" ]]; then
  echo "Error: Could not retrieve MAC address from netplan." >&2
  exit 1
fi

echo "Detected MAC address: $MAC"

# Assign cheese hostname based on MAC address
case "$MAC" in
38:9c:80:46:26:c8) # ← Replace with your first real MAC
  HOSTNAME="brie"
  ;;
68:f8:ea:22:e1:3d) # ← Replace with your second real MAC
  HOSTNAME="gouda"
  ;;
99:88:77:66:55:44) # ← Replace with your third real MAC
  HOSTNAME="camembert"
  ;;
*)
  echo "Unknown MAC address: $MAC ... hostname not changed." >&2
  exit 1
  ;;
esac

echo "Setting hostname to: $HOSTNAME"
sudo hostnamectl set-hostname "$HOSTNAME"

# Optional: also update /etc/hostname (hostnamectl usually does this, but to be safe)
echo "$HOSTNAME" | sudo tee /etc/hostname >/dev/null

echo "Hostname changed. Reboot or start a new shell to see the change."