#! /bin/bash

###
# ============LICENSE_START=======================================================
# policy-management
# ================================================================================
# Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
# ================================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#      http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============LICENSE_END=========================================================
###

function usage() {
	echo -n "Usage: $(basename $0) "
	echo -n "[(-d|--debug)] "
	echo -n "(-h|--host) <bus-host> "
	echo -n "[(-p|--port) <bus-port>] "
	echo -n "(-k|--key) <api-key> "
	echo -n "(-s|--secret) <api-secret> "
	echo -n "[(-P|--partition) <partition-count>] "
	echo -n "[(-R|--replication) <replication-count>] "
	echo "(-t|--topic) <topic> "
	echo ""
}

BUS_PORT=3904
PARTITION_COUNT=1
REPLICATION_COUNT=1

# command line options parsing
until [[ -z "$1" ]]; do
	case $1 in
		-d|--debug) 	set -x
				;;
		-h|--host) 		shift
					BUS_HOST=$1
					;;						
		-p|--port) 		shift
					BUS_PORT=$1
					;;
		-k|--key) 		shift
					API_KEY=$1
					;;	
		-s|--secret) 		shift
					API_SECRET=$1
					;;	
		-t|--topic) 		shift
					TOPIC=$1
					;;							
		-P|--partition-count) 	shift
					PARTITION_COUNT=$1
					;;
		-R|--replication-count) shift
					REPLICATION_COUNT=$1
					;;																	
		*)			usage
					exit 1
					;;
	esac
	shift
done

if [[ -z ${BUS_HOST} ]]; then
	echo "An UEB/DMAAP server must be provided."
	echo
	usage
	exit 1
fi

if [[ -z ${API_KEY} ]]; then
	echo "The API Key must be provided."
	usage
	exit 2
fi

if [[ -z ${API_SECRET} ]]; then
	echo "The API Secret must be provided."
	usage
	exit 3
fi

if [[ -z ${TOPIC} ]]; then
	echo "The Topic Name must be provided."
	usage
	exit 3
fi

if [[ -z ${PARTITION_COUNT} ]]; then
	echo "The Partition Count must be provided."
	usage
	exit 4
fi

if [[ -z ${REPLICATION_COUNT} ]]; then
	echo "The Replication Count must be provided."
	usage
	exit 5
fi

REQUEST_API_KEY_BODY=$(< <(cat <<EOF
{
	"topicName": "${TOPIC}",
	"topicDescription": "Generated by PDP-D $(hostname -f)",
	"partitionCount": ${PARTITION_COUNT},
	"replicationCount": ${REPLICATION_COUNT}
}
EOF
))

DATE=$(date)
DATE_HASH=$(echo -n "${DATE}" | openssl sha1 -hmac "${API_SECRET}" -binary | openssl base64)

unset http_proxy
curl --silent -X POST \
	--header "Accept:" \
	--header "X-CambriaDate: ${DATE}" \
	--header "X-CambriaAuth: ${API_KEY}:${DATE_HASH}" \
	--header "Content-Type: application/json" \
	--data "${REQUEST_API_KEY_BODY}" \
	http://${BUS_HOST}:${BUS_PORT}/topics/create