/**
 * 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 com.alibaba.jstorm.batch.util;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import backtype.storm.Config;

import com.alibaba.jstorm.cluster.ClusterState;
import com.alibaba.jstorm.cluster.DistributedClusterState;
import com.alibaba.jstorm.utils.JStormUtils;

public class BatchCommon {
    private static final Logger LOG = LoggerFactory.getLogger(BatchCommon.class);

    private static ClusterState zkClient = null;

    public static ClusterState getZkClient(Map conf) throws Exception {
        synchronized (BatchCommon.class) {
            if (zkClient != null) {
                return zkClient;
            }

            List<String> zkServers;
            if (conf.get(Config.TRANSACTIONAL_ZOOKEEPER_SERVERS) != null) {
                zkServers = (List<String>) conf.get(Config.TRANSACTIONAL_ZOOKEEPER_SERVERS);
            } else if (conf.get(Config.STORM_ZOOKEEPER_SERVERS) != null) {
                zkServers = (List<String>) conf.get(Config.STORM_ZOOKEEPER_SERVERS);
            } else {
                throw new RuntimeException("No setting zk");
            }

            int port = 2181;
            if (conf.get(Config.TRANSACTIONAL_ZOOKEEPER_PORT) != null) {
                port = JStormUtils.parseInt(conf.get(Config.TRANSACTIONAL_ZOOKEEPER_PORT), 2181);
            } else if (conf.get(Config.STORM_ZOOKEEPER_PORT) != null) {
                port = JStormUtils.parseInt(conf.get(Config.STORM_ZOOKEEPER_PORT), 2181);
            }

            String root = BatchDef.BATCH_ZK_ROOT;
            if (conf.get(Config.TRANSACTIONAL_ZOOKEEPER_ROOT) != null) {
                root = (String) conf.get(Config.TRANSACTIONAL_ZOOKEEPER_ROOT);
            }

            root = root + BatchDef.ZK_SEPERATOR + conf.get(Config.TOPOLOGY_NAME);

            Map<Object, Object> tmpConf = new HashMap<>();
            tmpConf.putAll(conf);
            tmpConf.put(Config.STORM_ZOOKEEPER_SERVERS, zkServers);
            tmpConf.put(Config.STORM_ZOOKEEPER_ROOT, root);
            zkClient = new DistributedClusterState(tmpConf);

            LOG.info("Successfully connect ZK");
            return zkClient;
        }

    }
}