/*
 * 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.acl;

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.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.AclConfig;
import org.apache.rocketmq.common.PlainAccessConfig;
import org.apache.rocketmq.remoting.RPCHook;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.apache.rocketmq.srvutil.ServerUtil;
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;

import java.lang.reflect.Field;
import java.util.List;
import java.util.Set;

public class GetAccessConfigSubCommand implements SubCommand {
    @Override
    public String commandName() {
        return "getAclConfig";
    }

    @Override
    public String commandAlias() {
        return "getAccessConfigSubCommand";
    }

    @Override
    public String commandDesc() {
        return "List all of acl config information in cluster.";
    }

    @Override
    public Options buildCommandlineOptions(Options options) {
        OptionGroup optionGroup = new OptionGroup();

        Option opt = new Option("b", "brokerAddr", true, "query acl config version for which broker");
        optionGroup.addOption(opt);

        opt = new Option("c", "clusterName", true, "query acl config version for specified cluster");
        optionGroup.addOption(opt);

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

        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 {

            if (commandLine.hasOption('b')) {
                String addr = commandLine.getOptionValue('b').trim();
                defaultMQAdminExt.start();
                printClusterBaseInfo(defaultMQAdminExt, addr);
                return;

            } else if (commandLine.hasOption('c')) {
                String clusterName = commandLine.getOptionValue('c').trim();

                defaultMQAdminExt.start();

                Set<String> masterSet =
                        CommandUtil.fetchMasterAddrByClusterName(defaultMQAdminExt, clusterName);
                for (String addr : masterSet) {
                    printClusterBaseInfo(defaultMQAdminExt, addr);
                }
                return;
            }

            ServerUtil.printCommandLineHelp("mqadmin " + this.commandName(), options);
        } catch (Exception e) {
            throw new SubCommandException(this.getClass().getSimpleName() + " command failed", e);
        } finally {
            defaultMQAdminExt.shutdown();
        }
    }

    private void printClusterBaseInfo(
            final DefaultMQAdminExt defaultMQAdminExt, final String addr) throws
            InterruptedException, MQBrokerException, RemotingException, MQClientException, IllegalAccessException {
        AclConfig aclConfig = defaultMQAdminExt.examineBrokerClusterAclConfig(addr);
        List<PlainAccessConfig> configs = aclConfig.getPlainAccessConfigs();
        List<String> globalWhiteAddrs = aclConfig.getGlobalWhiteAddrs();
        System.out.printf("\n");
        System.out.printf("%-20s: %s\n", "globalWhiteRemoteAddresses", globalWhiteAddrs.toString());
        System.out.printf("\n");
        System.out.printf("accounts:\n");
        if (configs != null && configs.size() > 0) {
            for (PlainAccessConfig config : configs) {
                Field[] fields = config.getClass().getDeclaredFields();
                for (Field field : fields) {
                    field.setAccessible(true);
                    if (field.get(config) != null) {
                        System.out.printf("%-1s %-18s: %s\n", "", field.getName(), field.get(config).toString());
                    } else {
                        System.out.printf("%-1s %-18s: %s\n", "", field.getName(), "");
                    }
                }
                System.out.printf("\n");
            }
        }
    }
}
