package com.gkhy.fourierSpecialGasMonitor.repository;


import com.gkhy.fourierSpecialGasMonitor.entity.GasCategory;
import com.gkhy.fourierSpecialGasMonitor.entity.GasConcentration;
import com.gkhy.fourierSpecialGasMonitor.entity.SummaryStats;
import com.gkhy.fourierSpecialGasMonitor.entity.req.SummaryStatsReqDTO;
import com.gkhy.fourierSpecialGasMonitor.entity.resp.SummaryStatsPageRespDTO;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.security.core.parameters.P;
import org.springframework.stereotype.Repository;

import javax.persistence.OrderBy;
import java.time.LocalDateTime;
import java.util.List;

@Repository
public interface GasConcentrationRepository extends JpaRepository<GasConcentration,Long>, JpaSpecificationExecutor<GasConcentration> {

    @OrderBy("dataReceivingTime desc")
    GasConcentration findTopByOrderByDataReceivingTimeDesc();

    List<GasConcentration> findAllByDataReceivingTimeBetweenOrderByDataReceivingTimeDesc(LocalDateTime startTime, LocalDateTime endTime);

    //分别查询temp,humidity,windSpeed,windDirection,pressure的平均值，最小值，最大值
    @Query("SELECT new com.gkhy.fourierSpecialGasMonitor.entity.SummaryStats(MIN(g.temp), MAX(g.temp), FUNCTION('ROUND', AVG(g.temp), 2)," +
            "MIN(g.humidity), MAX(g.humidity), FUNCTION('ROUND', AVG(g.humidity), 2), " +
            "MIN(g.windSpeed), MAX(g.windSpeed), FUNCTION('ROUND', AVG(g.windSpeed), 2), " +
            "MIN(g.windDirection), MAX(g.windDirection), FUNCTION('ROUND', AVG(g.windDirection), 2), " +
            "MIN(g.pressure), MAX(g.pressure), FUNCTION('ROUND', AVG(g.pressure), 2) " +
            ") FROM GasConcentration g WHERE g.time BETWEEN :startTime AND :endTime")
    SummaryStats findStats(@Param("startTime") LocalDateTime startTime,@Param("endTime") LocalDateTime endTime);


    @Query("SELECT new com.gkhy.fourierSpecialGasMonitor.entity.resp.SummaryStatsPageRespDTO( " +
            "MAX(CASE WHEN :type = 'temp' THEN g.temp " +
            "WHEN :type = 'humidity' THEN g.humidity " +
            "WHEN :type = 'windSpeed' THEN g.windSpeed " +
            "WHEN :type = 'windDirection' THEN g.windDirection " +
            "WHEN :type = 'pressure' THEN g.pressure END), " +
            "MIN(CASE WHEN :type = 'temp' THEN g.temp " +
            "WHEN :type = 'humidity' THEN g.humidity " +
            "WHEN :type = 'windSpeed' THEN g.windSpeed " +
            "WHEN :type = 'windDirection' THEN g.windDirection " +
            "WHEN :type = 'pressure' THEN g.pressure END), " +
            "FUNCTION('ROUND', AVG(CASE WHEN :type = 'temp' THEN g.temp " +
            "WHEN :type = 'humidity' THEN g.humidity " +
            "WHEN :type = 'windSpeed' THEN g.windSpeed " +
            "WHEN :type = 'windDirection' THEN g.windDirection " +
            "WHEN :type = 'pressure' THEN g.pressure END), 2) " +
            ") FROM GasConcentration g " +
            "WHERE g.time BETWEEN :startTime AND :endTime")
    SummaryStatsPageRespDTO findSummaryStatsByTypeAndTimeRange(@Param("type")String type,@Param("startTime") LocalDateTime startTime,@Param("endTime") LocalDateTime endTime);
}