#!/bin/bash

MACHINE_CONF_FILE="/root/machine.conf"
if [ ! -f "$MACHINE_CONF_FILE" ]; then
	echo "please checke existance of $MACHINE_CONF_FILE"
	exit 99
fi

source $MACHINE_CONF_FILE

# we should now have the following variables

echo "SERVER_NAME $SERVER_NAME"

echo "NET_IPV4_MAC $NET_IPV4_MAC"
echo "NET_IPV4_ADDRESS $NET_IPV4_ADDRESS"
echo "NET_IPV4_GATEWAY $NET_IPV4_GATEWAY"
echo "NET_IPV4_BROADCAST $NET_IPV4_BROADCAST"
echo "NET_IPV4_NETMASK $NET_IPV4_NETMASK"

read -p "Do you cant to create a machine with this config? " -n 1 -r
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
    exit 1
fi

###########################################
###########################################
###                                     ###
### no customisation below this point   ###
###                                     ###
###########################################
###########################################

# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=740895
#NET_IPV6_ADDRESS="2a01:4f8:141:21a3::3"
#NET_IPV6_NETMASK="64"
#NET_IPV6_GATEWAY="fe80::1"

HOST_NAME=$SERVER_NAME

# create passwd
PASSWORD=$(makepasswd --minchars=10 --maxchars=12)
echo "Generated random password"
echo "ADD TO PASSWORD STORE/KEEP IN SAFE PLACE"
echo $PASSWORD
read -p "Are you reay to continue? " -n 1 -r
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
    exit 1
fi


# helper function to wait until the VM has shut down
wait_for_shutdown()
{
  echo "Waiting for shutdown of $1"
  while true; do
    virsh list | grep -c $1 > /dev/null
    if [ $? -eq 1 ]; then
      echo
      echo "VM stopped: $1"
      return 0
    fi
    sleep 1
    echo -n "."
  done
}

# note on preseeding
# file must be injected in the root/intrd filesysetm
# if file is not named preseed.cfg the file name must be passed to the kerne like preseed/file=/some/whatever.cfg
# see here for the full story:
# https://www.debian.org/releases/stable/amd64/apbs02.html.en#preseed-loading


#VOLUME=$SERVER_NAME
#--network bridge=br0 \
#--network bridge=br-ext,mac=$NET_IPV4_MAC,model=virtio \

virt-install \
--connect qemu:///system \
--name $SERVER_NAME \
--ram 2048 \
--disk pool=vgpool,size=50,bus=ide \
--vcpus 2 \
--os-type linux \
--os-variant generic \
--network bridge=br-int,model=virtio \
--graphics none \
--console pty,target_type=serial \
--location 'http://mirror.hetzner.de/debian/packages/dists/jessie/main/installer-amd64/' \
--initrd-inject '/usr/local/virtinstaller/preseed.cfg' \
--extra-args "auto=true netcfg/get_hostname=$HOST_NAME netcfg/hostname=$HOST_NAME passwd/root-password=$PASSWORD passwd/root-password-again=$PASSWORD netcfg/get_ipaddress=$NET_IPV4_ADDRESS netcfg/get_netmask=$NET_IPV4_NETMASK netcfg/get_gateway=$NET_IPV4_GATEWAY console=ttyS0,115200n8 serial"

echo "Finished with virt-install."

read -p "Did the installation finish and the VM shut down? " -n 1 -r
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
    exit 1
fi

echo "Doing some aftermath..."
# shutdown
virsh destroy $SERVER_NAME

wait_for_shutdown $SERVER_NAME

# copy ssh-keys of admins into machine
# generate ssh-authorized keys so they can be uploaded into the root-account
SCRIPT_PATH=$(dirname $([ -L $0 ] && readlink -f $0 || echo $0))
$SCRIPT_PATH/gatherkeys.sh > $SCRIPT_PATH/authorized_keys
virt-copy-in -d $SERVER_NAME $SCRIPT_PATH/authorized_keys /root/.ssh/

# start again
virsh start $SERVER_NAME

# set domain to autostart
virsh autostart $SERVER_NAME