#!/bin/bash
# 
# This script can be used to manage multiple k8s clusters. (unfinished)

set -o nounset
set -o errexit
#set -o xtrace

function process_cmd {
    echo "$ACTION : $CMD"
    $CMD
    if [[ $? -ne 0 ]]; then
        echo "Command failed $CMD"
        exit 1
    fi
}

function usage {
    cat <<EOF
Usage: $0 COMMAND [args]
Commands:
    backup		To backup the current cluster (data and config)
    checkout <name>	To checkout and to use the chosen cluster context
    create <name>	To create a new cluster and to checkout the new cluster
    delete		To delete the current cluster (keeping backups)
    destroy		To delete the current cluster and its backups
    help		To display usage
    list		To list the existing cluster names
    rename <oldname> <newname>	To rename an existing cluster's name
    restore		To restore the current cluster from backups
    test		To do some smoke tests on the current cluster
    untest		To remove smoke tests on the current cluster
    upgrade             Upgrades the current kubernetes cluster
EOF
}

function cp_role_conf {
    ROLESPATH=$BASEPATH/../roles
    for ROLE in $(ls $ROLESPATH);
    do
        if [ -d "$ROLESPATH/$ROLE/defaults" ]; then
            mkdir -p $BASEPATH/../.cluster/$CLUSTERNAME/$ROLE/defaults/
            cp -rp $ROLESPATH/$ROLE/defaults/* $BASEPATH/../.cluster/$CLUSTERNAME/$ROLE/defaults/
        fi
    done;
}

function init {
    if [ ! -d "$BASEPATH/../.cluster" ]; then
        mkdir -p $BASEPATH/../.cluster
        CLUSTERNAME=default
        cp_role_conf
    fi
}

###############################################################

BASEPATH=$(cd `dirname $0`; pwd)

init

[ "$#" -gt 0 ] || { usage >&2; exit 2; }

case "$1" in

(backup)
        ACTION="action backup"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=precheck"
        ;;
(checkout)
        ACTION="action checkout"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(create)
        ACTION="action create"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=deploy -e common_run=true"
        PLAYBOOK="${BASEDIR}/ansible/mariadb_recovery.yml"
	;;
(delete)
        ACTION="action delete"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(destroy)
        ACTION="action destroy"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(help)
        usage
        ;;
(list)
        ACTION="action list"
        CMD="ls $BASEPATH/../.cluster"
        process_cmd
        ;;
(rename)
        ACTION="action rename"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(restore)
        ACTION="action restore"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(test)
        ACTION="action test"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(untest)
        ACTION="action untest"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(upgrade)
        ACTION="action upgrade"
        EXTRA_OPTS="$EXTRA_OPTS -e kolla_action=check"
        ;;
(*)
        usage
        exit 0
        ;;
esac

#CMD="echo $BASEPATH $ACTION"
#process_cmd