/*
 * 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 org.apache.rocketmq.tools.command.broker;
import java.util.Set;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;
import org.apache.commons.lang3.StringUtils;
import org.apache.rocketmq.common.message.MessageConst;
import org.apache.rocketmq.remoting.RPCHook;
import org.apache.rocketmq.tools.admin.DefaultMQAdminExt;
import org.apache.rocketmq.tools.command.CommandUtil;
import org.apache.rocketmq.tools.command.SubCommand;
import org.apache.rocketmq.tools.command.SubCommandException;

public class SwitchTimerEngineSubCommand implements SubCommand {
    private static final String ROCKSDB_TIMELINE = "ROCKSDB_TIMELINE";
    private static final String FILE_TIME_WHEEL = "FILE_TIME_WHEEL";

    @Override
    public String commandName() {
        return "switchTimerEngine";
    }

    @Override
    public String commandDesc() {
        return "switch the engine of timer message in broker";
    }

    @Override
    public Options buildCommandlineOptions(Options options) {
        OptionGroup optionGroup = new OptionGroup();
        Option opt = new Option("b", "brokerAddr", true, "update which broker");
        optionGroup.addOption(opt);

        opt = new Option("c", "clusterName", true, "update which cluster");
        optionGroup.addOption(opt);

        optionGroup.setRequired(true);
        options.addOptionGroup(optionGroup);

        opt = new Option("e", "engineType", true, "R/F, R for rocksdb timeline engine, F for file time wheel engine");
        opt.setRequired(true);
        options.addOption(opt);
        return options;
    }

    @Override
    public void execute(CommandLine commandLine, Options options, RPCHook rpcHook) throws SubCommandException {

        DefaultMQAdminExt defaultMQAdminExt = new DefaultMQAdminExt(rpcHook);
        defaultMQAdminExt.setInstanceName(Long.toString(System.currentTimeMillis()));
        try {
            String engineType = commandLine.getOptionValue('e').trim();
            if (StringUtils.isEmpty(engineType) || !MessageConst.TIMER_ENGINE_ROCKSDB_TIMELINE.equals(engineType) && !MessageConst.TIMER_ENGINE_FILE_TIME_WHEEL.equals(engineType)) {
                System.out.print("switchTimerEngine engineType must be R or F\n");
                return;
            }
            String engineName = MessageConst.TIMER_ENGINE_ROCKSDB_TIMELINE.equals(engineType) ? ROCKSDB_TIMELINE : FILE_TIME_WHEEL;
            if (commandLine.hasOption('b')) {
                String brokerAddr = commandLine.getOptionValue('b').trim();
                defaultMQAdminExt.start();
                defaultMQAdminExt.switchTimerEngine(brokerAddr, engineType);
                System.out.printf("switchTimerEngine to %s success, %s\n", engineName, brokerAddr);
                return;
            } else if (commandLine.hasOption('c')) {
                String clusterName = commandLine.getOptionValue('c').trim();
                defaultMQAdminExt.start();
                Set<String> masterSet = CommandUtil.fetchMasterAddrByClusterName(defaultMQAdminExt, clusterName);
                for (String brokerAddr : masterSet) {
                    try {
                        defaultMQAdminExt.switchTimerEngine(brokerAddr, engineType);
                        System.out.printf("switchTimerEngine to %s success, %s\n", engineName, brokerAddr);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                return;
            }
        } catch (Exception e) {
            throw new SubCommandException(this.getClass().getSimpleName() + " command failed", e);
        } finally {
            defaultMQAdminExt.shutdown();
        }

    }
}
