package com.njcn.influx.utils;


import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import okhttp3.OkHttpClient;
import org.influxdb.InfluxDB;
import org.influxdb.InfluxDB.ConsistencyLevel;
import org.influxdb.InfluxDBFactory;
import org.influxdb.dto.*;
import org.influxdb.dto.Point.Builder;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.temporal.ChronoField;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 类的介绍：
 *
 * @author xuyang
 * @version 1.0.0
 * @createTime 2021/11/16 10:20
 */
@Slf4j
@Data
public class InfluxDbUtils {
    public static OkHttpClient.Builder client = new OkHttpClient.Builder()
            .connectTimeout(1000, TimeUnit.SECONDS)
            .readTimeout(1000, TimeUnit.SECONDS)
            .writeTimeout(1000, TimeUnit.SECONDS);
    private static final int FRACTION_MIN_WIDTH = 0;
    private static final int FRACTION_MAX_WIDTH = 9;
    private static final boolean ADD_DECIMAL_POINT = true;
    private static final DateTimeFormatter RFC3339_FORMATTER = new DateTimeFormatterBuilder()
            .appendPattern("yyyy-MM-dd'T'HH:mm:ss")
            .appendFraction(ChronoField.NANO_OF_SECOND, FRACTION_MIN_WIDTH, FRACTION_MAX_WIDTH, ADD_DECIMAL_POINT)
            .appendZoneOrOffsetId()
            .toFormatter();

    /**
     * 用户名
     */
    private String username;
    /**
     * 密码
     */
    private String password;
    /**
     * 链接地址
     */
    private String openurl;
    /**
     * 数据库
     */
    private String dbName;
    /**
     * 保留策略
     */
    private String retentionPolicy;

    private InfluxDB influxDB;

    public InfluxDbUtils(String username, String password, String url, String dbName, String retentionPolicy) {
        this.username = username;
        this.password = password;
        this.openurl = url;
        this.dbName = dbName;
        this.retentionPolicy = retentionPolicy == null || retentionPolicy.equals("") ? "autogen" : retentionPolicy;
        influxDbBuild();
    }


    /**
     * 连接时序数据库 ，若不存在则创建
     *
     * @return
     */
    public InfluxDB influxDbBuild() {
        if (influxDB == null) {
            influxDB = InfluxDBFactory.connect(openurl, username, password, client);
        }
        try {
            // if (!influxDB.databaseExists(database)) {
            // influxDB.createDatabase(database);
            // }
        } catch (Exception e) {
            // 该数据库可能设置动态代理，不支持创建数据库
            // e.printStackTrace();
        } finally {
            influxDB.setRetentionPolicy(retentionPolicy);
        }
        influxDB.setLogLevel(InfluxDB.LogLevel.NONE);
        return influxDB;
    }


    /**
     * 创建数据库
     *
     * @param dbName
     */
    @SuppressWarnings("deprecation")
    public void createDB(String dbName) {
        influxDB.createDatabase(dbName);
    }

    /**
     * 删除数据库
     *
     * @param dbName
     */
    @SuppressWarnings("deprecation")
    public void deleteDB(String dbName) {
        influxDB.deleteDatabase(dbName);
    }

    /**
     * 测试连接是否正常
     *
     * @return true 正常
     */
    public boolean ping() {
        boolean isConnected = false;
        Pong pong;
        try {
            pong = influxDB.ping();
            if (pong != null) {
                isConnected = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return isConnected;
    }

    /**
     * 创建自定义保留策略
     *
     * @param policyName  策略名
     * @param days        保存天数
     * @param replication 保存副本数量
     * @param isDefault   是否设为默认保留策略
     */
    public void createRetentionPolicy(String dataBaseName, String policyName, int days, int replication,
                                      Boolean isDefault) {
        String sql = String.format("CREATE RETENTION POLICY \"%s\" ON \"%s\" DURATION %sd REPLICATION %s ", policyName,
                dataBaseName, days, replication);
        if (isDefault) {
            sql = sql + " DEFAULT";
        }
        query(sql);
    }

    /**
     * 创建默认的保留策略
     * <p>
     * 策略名：hour，保存天数：30天，保存副本数量：1,设为默认保留策略
     */
    public void createDefaultRetentionPolicy() {
        String command = String
                .format("CREATE RETENTION POLICY \"%s\" ON \"%s\" DURATION %s REPLICATION %s DEFAULT", "hour", dbName,
                        "30d", 1);
        this.query(command);
    }

    /**
     * 查询
     *
     * @param command 查询语句
     * @return
     */
    public QueryResult query(String command) {
        return influxDB.query(new Query(command, dbName));
    }

    /**
     * 插入
     *
     * @param measurement 表
     * @param tags        标签
     * @param fields      字段
     */
    public void insert(String measurement, Map<String, String> tags, Map<String, Object> fields, long time,
                       TimeUnit timeUnit) {
        Builder builder = Point.measurement(measurement);
        builder.tag(tags);
        builder.fields(fields);
        if (0 != time) {
            builder.time(time, timeUnit);
        }
        influxDB.write(dbName, retentionPolicy, builder.build());
    }


    /**
     * 批量写入测点
     *
     * @param batchPoints
     */
    public void batchInsert(BatchPoints batchPoints, TimeUnit timeUnit) {
        influxDB.write(batchPoints);
        // influxDB.enableGzip();
        // influxDB.enableBatch(2000,100,timeUnit);
        // influxDB.disableGzip();
        // influxDB.disableBatch();
    }

    /**
     * 批量写入数据
     *
     * @param database        数据库
     * @param retentionPolicy 保存策略
     * @param consistency     一致性
     * @param records         要保存的数据（调用BatchPoints.lineProtocol()可得到一条record）
     */
    public void batchInsert(final String database, final String retentionPolicy, final ConsistencyLevel consistency, TimeUnit timeUnit, final List<String> records) {
        influxDB.write(database, retentionPolicy, consistency, records);
    }

    /**
     * 批量写入数据
     *
     * @param database        数据库
     * @param retentionPolicy 保存策略
     * @param consistency     一致性
     * @param records         要保存的数据（调用BatchPoints.lineProtocol()可得到一条record）
     */
    public void batchInsert(final String database, final String retentionPolicy, final ConsistencyLevel consistency, final List<String> records) {
        influxDB.write(database, retentionPolicy, consistency, records);
    }


    /**
     * 删除
     *
     * @param command 删除语句
     * @return 返回错误信息
     */
    public String deleteMeasurementData(String command) {
        QueryResult result = influxDB.query(new Query(command, dbName));
        return result.getError();
    }

    /**
     * 关闭数据库
     */
    public void close() {
        influxDB.close();
    }

    /**
     * 构建Point
     *
     * @param measurement
     * @param time
     * @param fields
     * @return
     */
    public Point pointBuilder(String measurement, long time, TimeUnit timeUnit, Map<String, String> tags,
                              Map<String, Object> fields) {
        Point point = Point.measurement(measurement).time(time, timeUnit).tag(tags).fields(fields).build();
        return point;
    }


    //单条查询语句封装

    /**
     * 查询结果封装到map
     *
     * @param commond 单条sql语句
     * @return 查询结果
     */
    @Deprecated
    public List<Map<String, Object>> getResult(String commond) {
        List<Map<String, Object>> retList = new ArrayList<>();
        QueryResult queryResult = influxDB.query(new Query(commond, dbName));
        List<QueryResult.Result> results = queryResult.getResults();
        if (results == null || results.isEmpty()) {
            return retList;
        }
        QueryResult.Result result = results.get(0);
        List<QueryResult.Series> seriess = result.getSeries();
        if (seriess == null || seriess.isEmpty()) {
            return retList;
        }
        QueryResult.Series series = seriess.get(0);
        List<String> columns = series.getColumns();
        List<List<Object>> values = series.getValues();
        for (List<Object> columnValue : values) {
            Map<String, Object> map = new HashMap<>(1);
            for (int i = 0; i < columnValue.size(); i++) {
                if (columns.get(i).equals("time")) {
                    long aa = Instant.parse(columnValue.get(i).toString()).minusMillis(TimeUnit.HOURS.toMillis(8)).getEpochSecond();
                    map.put(columns.get(i), aa);
                } else {
                    map.put(columns.get(i), columnValue.get(i));
                }
            }
            retList.add(map);
        }
        return retList;
    }

    @Deprecated
    public List<Map<String, Object>> getResult(String commond, String type) {

        List<Map<String, Object>> retList = new ArrayList<>();
        QueryResult queryResult = influxDB.query(new Query(commond, dbName));
        List<QueryResult.Result> results = queryResult.getResults();
        if (results == null || results.isEmpty()) {
            return retList;
        }
        QueryResult.Result result = results.get(0);
        List<QueryResult.Series> seriess = result.getSeries();
        if (seriess == null || seriess.isEmpty()) {
            return retList;
        }
        QueryResult.Series series = seriess.get(0);
        List<String> columns = series.getColumns();
        List<List<Object>> values = series.getValues();
        for (List<Object> columnValue : values) {
            Map<String, Object> map = new HashMap<>(1);
            for (int i = 0; i < columnValue.size(); i++) {
                if (columns.get(i).equals("time")) {
                    Instant aa = Instant.parse(columnValue.get(i).toString()).minusMillis(TimeUnit.HOURS.toMillis(8));
                    LocalDateTime localDateTime = LocalDateTime.ofInstant(aa, ZoneId.systemDefault());
                    String time = localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
                    map.put(columns.get(i), time);
                } else {
                    map.put(columns.get(i), columnValue.get(i));
                }
            }
            retList.add(map);
        }
        return retList;
    }


    public List<Map<String, Object>> getMapResult(String commond) {

        List<Map<String, Object>> retList = new ArrayList<>();
        QueryResult queryResult = influxDB.query(new Query(commond, dbName));
        List<QueryResult.Result> results = queryResult.getResults();
        if (results == null || results.isEmpty()) {
            return retList;
        }
        QueryResult.Result result = results.get(0);
        List<QueryResult.Series> seriess = result.getSeries();
        if (seriess == null || seriess.isEmpty()) {
            return retList;
        }
        QueryResult.Series series = seriess.get(0);
        List<String> columns = series.getColumns();
        List<List<Object>> values = series.getValues();
        for (List<Object> columnValue : values) {
            Map<String, Object> map = new HashMap<>(1);
            for (int i = 0; i < columnValue.size(); i++) {
                if (columns.get(i).equals("time")) {
                    Instant instant = Instant.from(RFC3339_FORMATTER.parse(String.valueOf(columnValue.get(i))));
                    LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
                    String time = localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
                    map.put(columns.get(i), time);
                } else {
                    map.put(columns.get(i), columnValue.get(i));
                }
            }
            retList.add(map);
        }
        return retList;
    }


}