/*******************************************************************************
 * 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.math.BigInteger;
import java.util.List;

import org.onap.msb.apiroute.wrapper.consulextend.HealthClient;
import org.onap.msb.apiroute.wrapper.consulextend.cache.ServiceHealthCache;
import org.onap.msb.apiroute.wrapper.consulextend.cache.ConsulCache.Listener;
import org.onap.msb.apiroute.wrapper.consulextend.model.health.ServiceHealth;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.orbitz.consul.option.CatalogOptions;
import com.orbitz.consul.option.QueryOptions;

public class WatchServiceHealthTask extends WatchTask<List<ServiceHealth>> {
	private final static Logger LOGGER = LoggerFactory
			.getLogger(WatchServiceHealthTask.class);
	
	private ServiceHealthCache serviceHealthCache = null;
	private String serviceName="";

	public String getServiceName() {
		return serviceName;
	}

	public WatchServiceHealthTask(final HealthClient healthClient,
			final String serviceName,final boolean passing,
			final CatalogOptions catalogOptions, final int watchSeconds,
			final QueryOptions queryOptions) {
		initCache(healthClient, serviceName, passing, catalogOptions,
				watchSeconds, queryOptions);
	}

	public WatchServiceHealthTask(final HealthClient healthClient,
			final String serviceName,final boolean passing,
			final int watchSeconds)

	{
		initCache(healthClient, serviceName, passing, CatalogOptions.BLANK,
				watchSeconds, QueryOptions.BLANK);
	}

	public WatchServiceHealthTask(final HealthClient healthClient,
			final String serviceName, final int watchSeconds)

	{
		initCache(healthClient, serviceName, true, CatalogOptions.BLANK,
				watchSeconds, QueryOptions.BLANK);
	}

	private ServiceHealthCache initCache(final HealthClient healthClient,
			final String serviceName,final boolean passing,
			final CatalogOptions catalogOptions, final int watchSeconds,
			final QueryOptions queryOptions) {
//		LOGGER.info("************create {} watch task*****************",serviceName);
		this.serviceName = serviceName;		
		serviceHealthCache = ServiceHealthCache.newCache(healthClient,
				serviceName, passing, catalogOptions, watchSeconds,
				queryOptions);

		serviceHealthCache
				.addListener((Listener<List<ServiceHealth>>) new InternalListener());

		return serviceHealthCache;
	}

	public boolean startWatch() {
		
		if(serviceHealthCache!=null)
		{
			try {
				serviceHealthCache.start();
				LOGGER.info("************start {} watch task*****************",serviceName);
				return true;
			} catch (Exception e) {
				// TODO Auto-generated catch block
				LOGGER.warn("start service watch failed:", e);
			}
		}
		
		return false;
		
	}

	public boolean stopWatch(){
		if (serviceHealthCache != null) {
			try {
				serviceHealthCache.stop();
				LOGGER.info("************stop {} watch task*****************",serviceName);
				return true;
			} catch (Exception e) {
				// TODO Auto-generated catch block
				LOGGER.warn("stop service watch failed:", e);
			}
		}
		
		return false;
	}


	public boolean resetIndex()
	{
		if (LOGGER.isDebugEnabled()) {
			LOGGER.debug("reset " + serviceName + " consul index");
		}
		
		//reset consul index
		serviceHealthCache.updateIndex(BigInteger.valueOf(0));
		
		
		//reset modify index
		for (WatchTask.Filter<List<ServiceHealth>> filter : getAllFilters()) {
			if (filter instanceof ServiceModifyIndexFilter) {
				if (LOGGER.isDebugEnabled()) {
					LOGGER.debug("reset " + serviceName + " modify index");
				}
				return ((ServiceModifyIndexFilter) filter).resetModifyIndex();
			}
		}
		
		if (LOGGER.isDebugEnabled()) {
			LOGGER.debug("reset modify index.did not find filter:" + serviceName);
		}
		
		return false;
	}
}