#!/bin/bash
#set -x
OS_KEYPAIR_NAME=ovh_$(hostname -s)
OS_MACHINE_NAME=gbv
SERVER_RUNNING=false

function int_hdl(){
if $SERVER_RUNNING; then
echo "Deleting machine..."
OPENSTACK_RESPONSE="$(openstack server delete --wait $OS_MACHINE_NAME)"
until [ "$OPENSTACK_TERMINATION_RESPONSE" = '[]' ]
do
echo "Waiting for termination..."
sleep 10
OPENSTACK_TERMINATION_RESPONSE="$(openstack server list -f json)"
echo "OpenStack said:"
jq <<< $OPENSTACK_TERMINATION_RESPONSE
done
fi
}

trap int_hdl SIGINT
source openrc.sh

#
# Prerequisites
#
#if ! command -v ipcalc-ng &>/dev/null
#then
#echo >&2 "ipcalc-ng is required. Exiting."
#exit 1
#fi
if ! command -v openstack &>/dev/null
then
echo >&2 "openstack is required. Exiting."
exit 1
fi
if ! command -v nova &>/dev/null
then
echo >&2 "nova is required. Exiting."
exit 1
fi
if ! command -v ssh &>/dev/null
then
echo >&2 "ssh is required. Exiting."
exit 1
fi
if ! command -v ssh-keygen &>/dev/null
then
echo >&2 "ssh-keygen is required. Exiting."
exit 1
fi
if ! command -v jq &>/dev/null
then
echo >&2 "jq is required. Exiting."
exit 1
fi

#
# Upload key material
#
if [ ! -e ~/.ssh/id_ovh ]
then
echo "Generating SSH key..."
ssh-keygen -f ~/.ssh/id_ovh
fi
echo "Checking for SSH key in OpenStack..."
openstack keypair list|grep -q $OS_KEYPAIR_NAME
RESULT=$?
if [ $RESULT -eq 1 ]; then
echo "Uploading SSH key to OpenStack..."
nova keypair-add --pub-key ~/.ssh/id_ovh.pub $OS_KEYPAIR_NAME
fi
#
# Get flavor and image
#
echo "Gathering image and flavor information..."
FLAVOR_PRESEL="$(openstack flavor list -f json|jq -r '.[]|select(.Name=="s1-2")')"
echo "Selected this flavor:"
jq <<< $FLAVOR_PRESEL
FLAVOR="$(jq  -r '.ID' <<< $FLAVOR_PRESEL)"
IMAGE_PRESEL="$(openstack image list -f json|jq -r '.[]|select(.Name=="Debian 10")')"
echo "Selected this image:"
jq <<< $IMAGE_PRESEL
IMAGE="$(jq -r '.ID' <<< $IMAGE_PRESEL)"
echo "Creating server..."
openstack server create --image $IMAGE --flavor $FLAVOR --wait --key-name $OS_KEYPAIR_NAME $OS_MACHINE_NAME
SERVER_RUNNING=true

#
# Extract IPv4 address
#
SERVER_IPS="$(openstack server show gbv -f json|jq -r .addresses)"
SERVER_IPS="${SERVER_IPS##Ext-Net=}"
read -a SERVER_IPS <<< $SERVER_IPS
SERVER_IPS[0]="${SERVER_IPS[0]%%,}"
#ipcalc-ng -c4 ${SERVER_IPS[0]} &>/dev/null
grep -q '\.' <<< ${SERVER_IPS[0]}
IS_IPV4=$?
if [ $IS_IPV4 -eq 0 ]
then
SERVER_IP=${SERVER_IPS[0]}
else
SERVER_IP=${SERVER_IPS[1]}
fi
echo "Server reachable on $SERVER_IP."
#
# Open tunnel
#
echo "Waiting 30 seconds for setup completion..."
sleep 30
echo "Opening tunnel on socks://localhost:23406..."

trap - SIGINT
ssh -D 23406 -i ~/.ssh/id_ovh -o StrictHostKeyChecking=no -o GlobalKnownHostsFile=/dev/null -o UserKnownHostsFile=/dev/null -N debian@$SERVER_IP
echo "Tunnel closed. Destroying server..."
int_hdl