#!/usr/bin/env bash

TOP="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )/.."

case $1 in
    --reboot) reboot=1; shift ;;
esac

if [ $# != 1 ]; then
    echo "usage: teardown.sh [--reboot] name"
    exit 1
fi

d=$1
f=$TOP/clusters/$d/.$d.$$

teardown () {
    sed -s 's/cluster.\(apiserver\|worker\)/cluster.host/' $TOP/clusters/$d/default.nix > $f
    nixops modify -d $d $f
    nixops deploy -d $d
    [ ! -z $reboot ] && nixops reboot -d $d
    nixops ssh-for-each -d $d "rm -rf /var/run/kubernetes /var/lib/kubernetes /var/lib/etcd /var/lib/kubelet /var/lib/cfssl"
    rm $f
}
cat << EOF

************************************************************************
***                                                                  ***
*** WARNING: This will irrevokably destroy the running cluster!      ***
***                                                                  ***
************************************************************************

EOF

echo "Are you sure you want to tear down $d? (YES/no)"
read a
case $a in
    YES) teardown ;;
    *) echo "Bailing out." ;;
esac