#!/usr/bin/env bash

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

reboot=no
case $1 in
    --reboot) reboot=yes; shift ;;
esac

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

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

teardown () {
    mkdir -p $tmp
    cp -r $TOP/clusters/$d/* $tmp
    sed -i '/k8s *= *{/,+1 s/enable *= *true/enable = false/' $tmp/cluster.nix
    nixops modify -d $d $tmp
    nixops deploy -d $d
    [ $reboot = yes ] && 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 -rf $tmp
}
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