/*
 * 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 meshwatcher

import (
	"github.com/apache/dubbo-kubernetes/pkg/config/mesh"
	"github.com/apache/dubbo-kubernetes/pkg/kube/krt"
	meshconfig "istio.io/api/mesh/v1alpha1"
)

type networksAdapter struct {
	krt.Singleton[MeshNetworksResource]
}

func (n networksAdapter) Networks() *meshconfig.MeshNetworks {
	v := n.Singleton.Get()
	return v.MeshNetworks
}

// AddNetworksHandler registers a callback handler for changes to the networks config.
func (n networksAdapter) AddNetworksHandler(h func()) *mesh.WatcherHandlerRegistration {
	colReg := n.Singleton.AsCollection().RegisterBatch(func(o []krt.Event[MeshNetworksResource]) {
		h()
	}, false)

	reg := mesh.NewWatcherHandlerRegistration(func() {
		colReg.UnregisterHandler()
	})
	return reg
}

func (n networksAdapter) DeleteNetworksHandler(registration *mesh.WatcherHandlerRegistration) {
	registration.Remove()
}

var _ mesh.NetworksWatcher = networksAdapter{}
