#!/bin/bash -e

ROOK_VERSION=${ROOK_VERSION:-"v1.1.7"}
ROOK_DEPLOY_TIMEOUT=${ROOK_DEPLOY_TIMEOUT:-300}
ROOK_URL="https://raw.githubusercontent.com/rook/rook/${ROOK_VERSION}/cluster/examples/kubernetes/ceph"

function deploy_rook() {
	kubectl create -f "${ROOK_URL}/common.yaml"
	kubectl create -f "${ROOK_URL}/operator.yaml"
	kubectl create -f "${ROOK_URL}/cluster-test.yaml"
	kubectl create -f "${ROOK_URL}/toolbox.yaml"
	kubectl create -f "${ROOK_URL}/filesystem-test.yaml"
	kubectl create -f "${ROOK_URL}/pool-test.yaml"

	# Check if CephCluster is empty
	if ! kubectl -n rook-ceph get cephclusters -oyaml | grep 'items: \[\]' &>/dev/null; then
		check_ceph_cluster_health
	fi

	# Check if CephFileSystem is empty
	if ! kubectl -n rook-ceph get cephfilesystems -oyaml | grep 'items: \[\]' &>/dev/null; then
		check_mds_stat
	fi

	# Check if CephBlockPool is empty
	if ! kubectl -n rook-ceph get cephblockpools -oyaml | grep 'items: \[\]' &>/dev/null; then
		check_rbd_stat
	fi
}

function teardown_rook() {
	kubectl delete -f "${ROOK_URL}/pool-test.yaml"
	kubectl delete -f "${ROOK_URL}/filesystem-test.yaml"
	kubectl delete -f "${ROOK_URL}/toolbox.yaml"
	kubectl delete -f "${ROOK_URL}/cluster-test.yaml"
	kubectl delete -f "${ROOK_URL}/operator.yaml"
	kubectl delete -f "${ROOK_URL}/common.yaml"
}

function check_ceph_cluster_health() {
	for ((retry = 0; retry <= ROOK_DEPLOY_TIMEOUT; retry = retry + 5)); do
		echo "Wait for rook deploy... ${retry}s" && sleep 5

		CEPH_STATE=$(kubectl -n rook-ceph get cephclusters -o jsonpath='{.items[0].status.state}')
		CEPH_HEALTH=$(kubectl -n rook-ceph get cephclusters -o jsonpath='{.items[0].status.ceph.health}')
		echo "Checking CEPH cluster state: [$CEPH_STATE]"
		if [ "$CEPH_STATE" = "Created" ]; then
			if [ "$CEPH_HEALTH" = "HEALTH_OK" ]; then
				echo "Creating CEPH cluster is done. [$CEPH_HEALTH]"
				break
			fi
		fi
	done

	if [ "$retry" -gt "$ROOK_DEPLOY_TIMEOUT" ]; then
		echo "[Timeout] CEPH cluster not in a healthy state (timeout)"
		exit 1
	fi
	echo ""
}

function check_mds_stat() {
	for ((retry = 0; retry <= ROOK_DEPLOY_TIMEOUT; retry = retry + 5)); do
		FS_NAME=$(kubectl -n rook-ceph get cephfilesystems.ceph.rook.io -ojsonpath='{.items[0].metadata.name}')
		echo "Checking MDS ($FS_NAME) stats... ${retry}s" && sleep 5

		ACTIVE_COUNT=$(kubectl -n rook-ceph get cephfilesystems myfs -ojsonpath='{.spec.metadataServer.activeCount}')

		ACTIVE_COUNT_NUM=$((ACTIVE_COUNT + 0))
		echo "MDS ($FS_NAME) active_count: [$ACTIVE_COUNT_NUM]"
		if ((ACTIVE_COUNT_NUM < 1)); then
			continue
		else
			if kubectl -n rook-ceph get pod -l rook_file_system=myfs | grep Running &>/dev/null; then
				echo "Filesystem ($FS_NAME) is successfully created..."
				break
			fi
		fi
	done

	if [ "$retry" -gt "$ROOK_DEPLOY_TIMEOUT" ]; then
		echo "[Timeout] Failed to get ceph filesystem pods"
		exit 1
	fi
	echo ""
}

function check_rbd_stat() {
	for ((retry = 0; retry <= ROOK_DEPLOY_TIMEOUT; retry = retry + 5)); do
		RBD_POOL_NAME=$(kubectl -n rook-ceph get cephblockpools -ojsonpath='{.items[0].metadata.name}')
		echo "Checking RBD ($RBD_POOL_NAME) stats... ${retry}s" && sleep 5

		TOOLBOX_POD=$(kubectl -n rook-ceph get pods -l app=rook-ceph-tools -o jsonpath='{.items[0].metadata.name}')
		TOOLBOX_POD_STATUS=$(kubectl -n rook-ceph get pod "$TOOLBOX_POD" -ojsonpath='{.status.phase}')
		[[ "$TOOLBOX_POD_STATUS" != "Running" ]] && \
			{ echo "Toolbox POD ($TOOLBOX_POD) status: [$TOOLBOX_POD_STATUS]"; continue; }

		if kubectl exec -n rook-ceph "$TOOLBOX_POD" -it -- rbd pool stats "$RBD_POOL_NAME" &>/dev/null; then
			echo "RBD ($RBD_POOL_NAME) is successfully created..."
			break
		fi
	done

	if [ "$retry" -gt "$ROOK_DEPLOY_TIMEOUT" ]; then
		echo "[Timeout] Failed to get RBD pool stats"
		exit 1
	fi
	echo ""
}

case "${1:-}" in
deploy)
	deploy_rook
	;;
teardown)
	teardown_rook
	;;
*)
	echo " $0 [command]
Available Commands:
  deploy         Deploy a rook
  teardown       Teardown a rook
" >&2
	;;
esac