//
// DISCLAIMER
//
// Copyright 2016-2024 ArangoDB GmbH, Cologne, Germany
//
// 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.
//
// Copyright holder is ArangoDB GmbH, Cologne, Germany
//

package metric_descriptions

import (
	"sync"
	"github.com/arangodb/kube-arangodb/pkg/util/metrics"
)

var (
	descriptions []metrics.Description
	descriptionsLock sync.Mutex

	collectors []metrics.Collector
	collectorsLock sync.Mutex
)

func registerDescription( d ... metrics.Description) {
	if len(d) == 0 {
		return
	}

	descriptionsLock.Lock()
	defer descriptionsLock.Unlock()

	descriptions = append(descriptions, d...)
}

func registerCollector( d ... metrics.Collector) {
	if len(d) == 0 {
		return
	}

	collectorsLock.Lock()
	defer collectorsLock.Unlock()

	collectors = append(collectors, d...)
}

func Descriptions (c metrics.PushDescription) {
	descriptionsLock.Lock()
	defer descriptionsLock.Unlock()

	c.Push(descriptions...)
}

func Collectors (c metrics.PushMetric) {
	collectorsLock.Lock()
	defer collectorsLock.Unlock()

	for _, collector := range collectors {
		collector.CollectMetrics(c)
	}
}