/*
 * Copyright 2017, OpenSkywalking Organization All rights reserved.
 *
 * 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.
 *
 * Project repository: https://github.com/OpenSkywalking/skywalking
 */

package org.skywalking.apm.collector.storage.h2.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import org.skywalking.apm.collector.client.h2.H2Client;
import org.skywalking.apm.collector.client.h2.H2ClientException;
import org.skywalking.apm.collector.core.data.Data;
import org.skywalking.apm.collector.storage.dao.IInstanceDAO;
import org.skywalking.apm.collector.storage.h2.base.dao.H2DAO;
import org.skywalking.apm.collector.storage.base.sql.SqlBuilder;
import org.skywalking.apm.collector.storage.table.register.InstanceDataDefine;
import org.skywalking.apm.collector.storage.table.register.InstanceTable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author peng-yongsheng, clevertension
 */
public class InstanceH2DAO extends H2DAO implements IInstanceDAO {
    private final Logger logger = LoggerFactory.getLogger(InstanceH2DAO.class);

    private static final String GET_INSTANCE_ID_SQL = "select {0} from {1} where {2} = ? and {3} = ?";
    private static final String UPDATE_HEARTBEAT_TIME_SQL = "update {0} set {1} = ? where {2} = ?";

    @Override public int getInstanceId(int applicationId, String agentUUID) {
        logger.info("get the application id with application id = {}, agentUUID = {}", applicationId, agentUUID);
        H2Client client = getClient();
        String sql = SqlBuilder.buildSql(GET_INSTANCE_ID_SQL, InstanceTable.COLUMN_INSTANCE_ID, InstanceTable.TABLE, InstanceTable.COLUMN_APPLICATION_ID,
            InstanceTable.COLUMN_AGENT_UUID);
        Object[] params = new Object[] {applicationId, agentUUID};
        try (ResultSet rs = client.executeQuery(sql, params)) {
            if (rs.next()) {
                return rs.getInt(InstanceTable.COLUMN_INSTANCE_ID);
            }
        } catch (SQLException | H2ClientException e) {
            logger.error(e.getMessage(), e);
        }
        return 0;
    }

    @Override public int getMaxInstanceId() {
        return getMaxId(InstanceTable.TABLE, InstanceTable.COLUMN_INSTANCE_ID);
    }

    @Override public int getMinInstanceId() {
        return getMinId(InstanceTable.TABLE, InstanceTable.COLUMN_INSTANCE_ID);
    }

    @Override public void save(Data data) {
        String id = InstanceDataDefine.Instance.INSTANCE.getId(data);
        int instanceId = InstanceDataDefine.Instance.INSTANCE.getInstanceId(data);
        int applicationId = InstanceDataDefine.Instance.INSTANCE.getApplicationId(data);
        String agentUUID = InstanceDataDefine.Instance.INSTANCE.getAgentUUID(data);
        long registerTime = InstanceDataDefine.Instance.INSTANCE.getRegisterTime(data);
        long heartBeatTime = InstanceDataDefine.Instance.INSTANCE.getHeartBeatTime(data);
        String osInfo = InstanceDataDefine.Instance.INSTANCE.getOsInfo(data);

        H2Client client = getClient();
        Map<String, Object> source = new HashMap<>();
        source.put(InstanceTable.COLUMN_ID, id);
        source.put(InstanceTable.COLUMN_INSTANCE_ID, instanceId);
        source.put(InstanceTable.COLUMN_APPLICATION_ID, applicationId);
        source.put(InstanceTable.COLUMN_AGENT_UUID, agentUUID);
        source.put(InstanceTable.COLUMN_REGISTER_TIME, registerTime);
        source.put(InstanceTable.COLUMN_HEARTBEAT_TIME, heartBeatTime);
        source.put(InstanceTable.COLUMN_OS_INFO, osInfo);
        String sql = SqlBuilder.buildBatchInsertSql(InstanceTable.TABLE, source.keySet());
        Object[] params = source.values().toArray(new Object[0]);
        try {
            client.execute(sql, params);
        } catch (H2ClientException e) {
            logger.error(e.getMessage(), e);
        }
    }

    @Override public void updateHeartbeatTime(int instanceId, long heartbeatTime) {
        H2Client client = getClient();
        String sql = SqlBuilder.buildSql(UPDATE_HEARTBEAT_TIME_SQL, InstanceTable.TABLE, InstanceTable.COLUMN_HEARTBEAT_TIME,
            InstanceTable.COLUMN_ID);
        Object[] params = new Object[] {heartbeatTime, instanceId};
        try {
            client.execute(sql, params);
        } catch (H2ClientException e) {
            logger.error(e.getMessage(), e);
        }
    }
}