// 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.doris.analysis;

import org.apache.doris.common.AnalysisException;
import org.apache.doris.common.Pair;
import org.apache.doris.system.SystemInfoService;

import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.collect.Sets;
import org.apache.commons.lang.NotImplementedException;

import java.util.List;
import java.util.Map;
import java.util.Set;

public class ModifyBrokerClause extends AlterClause {
    public enum ModifyOp {
        OP_ADD,
        OP_DROP,
        OP_DROP_ALL
    }

    private final ModifyOp op;
    private final String brokerName;
    private final List<String> hostPorts;

    protected Set<Pair<String, Integer>> hostPortPairs;

    public ModifyBrokerClause(ModifyOp op, String brokerName, List<String> hostPorts) {
        this.op = op;
        this.brokerName = brokerName;
        this.hostPorts = hostPorts;
    }

    public static ModifyBrokerClause createAddBrokerClause(String brokerName, List<String> hostPorts) {
        return new ModifyBrokerClause(ModifyOp.OP_ADD, brokerName, hostPorts);
    }

    public static ModifyBrokerClause createDropBrokerClause(String brokerName, List<String> hostPorts) {
        return new ModifyBrokerClause(ModifyOp.OP_DROP, brokerName, hostPorts);
    }

    public static ModifyBrokerClause createDropAllBrokerClause(String brokerName) {
        return new ModifyBrokerClause(ModifyOp.OP_DROP_ALL, brokerName, null);
    }

    public ModifyOp getOp() {
        return op;
    }

    public String getBrokerName() {
        return brokerName;
    }

    public Set<Pair<String, Integer>> getHostPortPairs() {
        return hostPortPairs;
    }

    private void validateBrokerName() throws AnalysisException {
        if (Strings.isNullOrEmpty(brokerName)) {
            throw new AnalysisException("Broker's name can't be empty.");
        }
    }

    @Override
    public void analyze(Analyzer analyzer) throws AnalysisException {
        validateBrokerName();

        if (op != ModifyOp.OP_DROP_ALL) {
            hostPortPairs = Sets.newHashSet();
            for (String hostPort : hostPorts) {
                Pair<String, Integer> pair = SystemInfoService.validateHostAndPort(hostPort);
                hostPortPairs.add(pair);
            }
            Preconditions.checkState(!hostPortPairs.isEmpty());
        }
    }

    @Override
    public String toSql() {
        throw new NotImplementedException();
    }

    @Override
    public Map<String, String> getProperties() {
        throw new NotImplementedException();
    }
}
