/*
 * Copyright 2014-2019 the original author or authors.
 *
 * 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.
 */

package de.codecentric.boot.admin.server.config;

import java.util.List;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import org.reactivestreams.Publisher;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
import org.springframework.boot.autoconfigure.hazelcast.HazelcastAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import de.codecentric.boot.admin.server.domain.events.InstanceEvent;
import de.codecentric.boot.admin.server.domain.values.InstanceId;
import de.codecentric.boot.admin.server.eventstore.HazelcastEventStore;
import de.codecentric.boot.admin.server.eventstore.InstanceEventStore;
import de.codecentric.boot.admin.server.notify.HazelcastNotificationTrigger;
import de.codecentric.boot.admin.server.notify.NotificationTrigger;
import de.codecentric.boot.admin.server.notify.Notifier;

@Configuration(proxyBeanMethods = false)
@ConditionalOnBean(AdminServerMarkerConfiguration.Marker.class)
@ConditionalOnSingleCandidate(HazelcastInstance.class)
@ConditionalOnProperty(prefix = "spring.boot.admin.hazelcast", name = "enabled", matchIfMissing = true)
@AutoConfigureBefore({ AdminServerAutoConfiguration.class, AdminServerNotifierAutoConfiguration.class })
@AutoConfigureAfter(HazelcastAutoConfiguration.class)
public class AdminServerHazelcastAutoConfiguration {

	public static final String DEFAULT_NAME_EVENT_STORE_MAP = "spring-boot-admin-event-store";

	public static final String DEFAULT_NAME_SENT_NOTIFICATIONS_MAP = "spring-boot-admin-sent-notifications";

	@Value("${spring.boot.admin.hazelcast.event-store:" + DEFAULT_NAME_EVENT_STORE_MAP + "}")
	private String nameEventStoreMap = DEFAULT_NAME_EVENT_STORE_MAP;

	@Bean
	@ConditionalOnMissingBean(InstanceEventStore.class)
	public HazelcastEventStore eventStore(HazelcastInstance hazelcastInstance) {
		IMap<InstanceId, List<InstanceEvent>> map = hazelcastInstance.getMap(this.nameEventStoreMap);
		return new HazelcastEventStore(map);
	}

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnBean(Notifier.class)
	public static class NotifierTriggerConfiguration {

		@Value("${spring.boot.admin.hazelcast.sent-notifications:" + DEFAULT_NAME_SENT_NOTIFICATIONS_MAP + "}")
		private String nameSentNotificationsMap = DEFAULT_NAME_SENT_NOTIFICATIONS_MAP;

		@Bean(initMethod = "start", destroyMethod = "stop")
		@ConditionalOnMissingBean(NotificationTrigger.class)
		public NotificationTrigger notificationTrigger(HazelcastInstance hazelcastInstance, Notifier notifier,
				Publisher<InstanceEvent> events) {
			return new HazelcastNotificationTrigger(notifier, events,
					hazelcastInstance.getMap(this.nameSentNotificationsMap));
		}

	}

}
