package com.zy.influxdb.service;

import com.influxdb.annotations.Column;
import com.influxdb.annotations.Measurement;
import com.influxdb.client.InfluxDBClient;
import com.influxdb.client.WriteApiBlocking;
import com.influxdb.client.domain.WritePrecision;
import com.influxdb.client.write.Point;
import com.influxdb.query.FluxTable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.Instant;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;


@Service
public class InfluxDBService  {

    private static final Logger logger = LoggerFactory.getLogger(InfluxDBService.class);

    @Autowired
    private InfluxDBClient influxDBClient;

    // 构造函数注入客户端



    /**
     * 写入数据
     * @param measurement 表名
     * @param tags 标签
     * @param fields 字段
     */
    public void writeData(String measurement, Map<String,String> tags,Map<String,Object> fields) {
        WriteApiBlocking writeApiBlocking = influxDBClient.getWriteApiBlocking();
        Point point = Point.measurement(measurement)
                .addTags(tags)
                .addFields(fields)
                .time(Instant.now().toEpochMilli(), WritePrecision.MS);
        try {
            writeApiBlocking.writePoint(point);
            System.out.println("Data written to the database.");
        }
        catch (Exception e) {
            System.err.println("Failed to write data to the database.");
            e.printStackTrace();
        }
    }
    /**
     * 查询数据
     * @param sql sql语句
     * @return 查询结果列表
     */
    public  List<FluxTable> queryData(String sql) {
        try {
            // 执行查询
            return influxDBClient.getQueryApi().query(sql);
        } catch (Exception e) {
            System.err.println("Failed to query data from the database.");
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 查询数据
     * @param sql sql语句
     * @return 查询结果列表
     */
    public  <T>  List<T> queryData(String sql,T t) {
        try {
            // 执行查询
            List<T> temperatures = influxDBClient.getQueryApi().q(sql, t.getClass());


        } catch (Exception e) {
            System.err.println("Failed to query data from the database.");
            e.printStackTrace();
        }
        return null;
    }

    //POJO类定义如下：
    @Measurement(name = "temperature")//表名
    public static class Temperature {

        @Column(tag = true)//tag
        String location;

        @Column//field
        Double value;

        @Column(timestamp = true)//timestamp
        Instant time;

    }
}