// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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.

package servicecenter

import (
	"github.com/apache/servicecomb-service-center/server/core/backend"
	"github.com/apache/servicecomb-service-center/server/plugin/pkg/discovery"
)

// ServiceCenterAdaptor is a discovery service adaptor implement of one kubernetes cluster
type ServiceCenterAdaptor struct {
	discovery.Cacher
	discovery.Indexer
}

func (se *ServiceCenterAdaptor) Run() {
	if r, ok := se.Cacher.(discovery.Runnable); ok {
		r.Run()
	}
}

func (se *ServiceCenterAdaptor) Stop() {
	if r, ok := se.Cacher.(discovery.Runnable); ok {
		r.Stop()
	}
}

func (se *ServiceCenterAdaptor) Ready() <-chan struct{} {
	if r, ok := se.Cacher.(discovery.Runnable); ok {
		return r.Ready()
	}
	return closedCh
}

func NewServiceCenterAdaptor(t discovery.Type, cfg *discovery.Config) *ServiceCenterAdaptor {
	if t == backend.SCHEMA {
		return &ServiceCenterAdaptor{
			Indexer: NewClusterIndexer(t, discovery.NullCache),
			Cacher:  discovery.NullCacher,
		}
	} else {
		cache := discovery.NewKvCache(t.String(), cfg)
		return &ServiceCenterAdaptor{
			Indexer: NewClusterIndexer(t, cache),
			Cacher:  BuildCacher(t, cfg, cache),
		}
	}
}