/*******************************************************************************
 * Copyright 2016-2017 ZTE, Inc. and others.
 * 
 * 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 org.onap.msb.apiroute.wrapper.consulextend.expose;

import java.util.ArrayList;
import java.util.List;

import org.onap.msb.apiroute.SyncDataManager;
import org.onap.msb.apiroute.wrapper.consulextend.model.health.ImmutableService;
import org.onap.msb.apiroute.wrapper.consulextend.model.health.ImmutableServiceHealth;
import org.onap.msb.apiroute.wrapper.consulextend.model.health.Service;
import org.onap.msb.apiroute.wrapper.consulextend.model.health.ServiceHealth;
import org.onap.msb.apiroute.wrapper.queue.QueueManager;
import org.onap.msb.apiroute.wrapper.queue.ServiceData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.orbitz.consul.model.ConsulResponse;
import com.orbitz.consul.model.health.ImmutableNode;



public class CheckServiceDataEmptyAndAutoStopWatchFilter implements
		WatchTask.Filter<List<ServiceHealth>> {

	private final static Logger LOGGER = LoggerFactory
			.getLogger(CheckServiceDataEmptyAndAutoStopWatchFilter.class);
	private final String serviceName;

	public CheckServiceDataEmptyAndAutoStopWatchFilter(
			final String serviceName) {
		this.serviceName = serviceName;
	}

	@Override
	public boolean filter(ConsulResponse<List<ServiceHealth>> object) {
		// TODO Auto-generated method stub
		boolean result = check(object);

		if (!result) {
			// create delete
			writeServiceToQueue4Del();
			// stop watch
			SyncDataManager.stopWatchService(serviceName);
		}

		return result;
	}

	// when:
	// 1)service had been deleted
	// 2)service Health check was not passing
	// single service return [],size==0
	// stop this service watching task and create delete event
	private boolean check(ConsulResponse<List<ServiceHealth>> object) {
		boolean result = true;

		if (object == null || object.getResponse() == null
				|| object.getResponse().size() == 0) {
			LOGGER.info("check service-{},its data is empty",
					serviceName);
			return false;
		}

		return result;
	}

	private void writeServiceToQueue4Del() {
		ServiceData<List<ServiceHealth>> data = new ServiceData<List<ServiceHealth>>();
		data.setDataType(ServiceData.DataType.service);
		data.setOperate(ServiceData.Operate.delete);
		
		// tell the subsequent operation the service name which will be deleted
		Service service = ImmutableService.builder().id("").port(0).address("")
				.service(serviceName).addTags("").createIndex(0).modifyIndex(0).build();
		ServiceHealth serviceHealth = ImmutableServiceHealth.builder()
				.service(service)
				.node(ImmutableNode.builder().node("").address("").build())
				.build();
		List<ServiceHealth> serviceHealthList = new ArrayList<ServiceHealth>();
		serviceHealthList.add(serviceHealth);

		data.setData(serviceHealthList);

		LOGGER.info("put delete service["
				+ serviceName
				+ "] to service queue :because of deleted ");

		try {
			QueueManager.getInstance().putIn(data);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			LOGGER.warn(
					"put delete service["
							+ serviceName
							+ "]  to  service queue interrupted because of deleted:",
					e);
		}
	}
}