#!/bin/bash

clear

# When cloned, Debian switches to eth1 instead of eth0 for some reason
if ! ping -c 1 google.com &>/dev/null; then
	cat >> /etc/network/interfaces <<-EOF
		auto eth1
		iface eth1 inet dhcp
		EOF
	ifup eth1 &>/dev/null
fi

echo "Updating Debian in the background..."
apt-get update &>/dev/null && apt-get -y upgrade &>/dev/null &
sleep 1

pattern="^[a-z][-a-z0-9]*$"

echo; echo "Changing hostname..."
read -p "Hostname: " hostname
while [[ ! $hostname =~ $pattern ]]; do
	echo "Invalid hostname."
	read -p "Hostname: " hostname
done
echo $hostname > /etc/hostname
sed -i 's/127.0.1.1.*/127.0.1.1\t'"$hostname"'/' /etc/hosts
echo "...done."

echo; echo "Adding new user..."
read -p "Username: " username
while [[ ! $username =~ $pattern ]]; do
	echo "Invalid username."
	read -p "Username: " username
done
adduser --gecos "" --quiet $username
adduser $username sudo
sleep 2

clear
echo "The machine will be ready soon."

if [[ -n $(jobs -r) ]]; then
	echo; echo -n "Waiting for updates to finish. This will take a while."
	sleep 2
	i=0
	while [[ -n $(jobs -r) ]]; do
		echo -n "."
		sleep 2
	done
	echo "done."
fi

echo; echo -n "Enabling Hyper-V Virtual Guest Services..."
cat >> /etc/initramfs-tools/modules <<-EOF
	hv_vmbus
	hv_storvsc
	hv_blkvsc
	hv_netvsc
	EOF
update-initramfs -u &>/dev/null &
sleep 2
while [[ -n $(jobs -r) ]]; do
	echo -n "."
	sleep 2
done
echo "done."

echo; echo -n "Installing OpenSSH server..."
apt-get -y install openssh-server &>/dev/null &
sleep 2
while [[ -n $(jobs -r) ]]; do
	echo -n "."
	sleep 2
done
echo "done."

echo; echo "Setup complete. Rebooting..."
mv /etc/inittab.orig /etc/inittab
mv .profile-orig .profile
shutdown -r now