package com.moral.api.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.moral.api.entity.CityAqiDaily;
import com.moral.api.mapper.CityAqiDailyMapper;
import com.moral.api.pojo.dto.dataDisplay.PollutionLevelProportionDTO;
import com.moral.api.service.CityAqiDailyService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.moral.util.AQIUtils;
import com.moral.util.DateUtils;
import com.moral.util.MathUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * <p>
 * 城市aqi日数据表 服务实现类
 * </p>
 *
 * @author moral
 * @since 2021-11-01
 */
@Service
public class CityAqiDailyServiceImpl extends ServiceImpl<CityAqiDailyMapper, CityAqiDaily> implements CityAqiDailyService {

    @Autowired
    CityAqiDailyMapper cityAqiDailyMapper;

    @Override
    public PollutionLevelProportionDTO queryPollutionLevelsForThisYear(Integer regionCode) {
        //获取时间  今年第一天 至
        Date startDate = DateUtils.getFirstDayOfCurrYear();
        Date endDate = DateUtils.getYesterdayDate();
        //查询数据
        QueryWrapper<CityAqiDaily> wrapper = new QueryWrapper<>();
        wrapper.eq("city_code",regionCode);
        wrapper.between("time",startDate,endDate);
        List<CityAqiDaily> cityAqiDailies = cityAqiDailyMapper.selectList(wrapper);
        //取开始结束时间,拼装返回time
        if(cityAqiDailies.size()==0)
            return null;
        String startTime = DateUtils.dateToDateString(cityAqiDailies.get(0).getTime(),"yyyy-MM-dd");
        String endTime = DateUtils.dateToDateString(cityAqiDailies.get(cityAqiDailies.size()-1).getTime(),"yyyy-MM-dd");
        String time = startTime+" 至 "+endTime;
        //如果时间有重复则去重
        Map<String,CityAqiDaily> tmpMap = new HashMap<>();
        for (CityAqiDaily cityAqiDaily : cityAqiDailies) {
            String tmpTime = DateUtils.dateToDateString(cityAqiDaily.getTime(),"yyyy-MM-dd");
            tmpMap.put(tmpTime,cityAqiDaily);
        }
        cityAqiDailies = new ArrayList<CityAqiDaily>(tmpMap.values());
        //统计各污染等级的天数
        Map<String,Integer> pollutionDaysMap = new HashMap<>();
        for (CityAqiDaily cityAqiDaily : cityAqiDailies) {
            Map<String,Object> valueMap = JSON.parseObject(cityAqiDaily.getValue(),Map.class);
            if(valueMap.get("AQI")==null)
                continue;
            Integer aqi = Integer.valueOf(valueMap.get("AQI").toString());
            //计算AQI污染等级
            String pollutionClass = AQIUtils.classOfPollutionByAqi(aqi);
            Integer days = pollutionDaysMap.get(pollutionClass);
            if(days==null){
                pollutionDaysMap.put(pollutionClass,1);
            }else{
                pollutionDaysMap.put(pollutionClass,days+1);
            }
        }
        //计算比例
        List<Map<String,Object>> valueMap = new ArrayList<>();
        Set<Map.Entry<String, Integer>> entries = pollutionDaysMap.entrySet();
        Iterator<Map.Entry<String, Integer>> iterator = entries.iterator();
        while(iterator.hasNext()){
            Map.Entry<String, Integer> entry = iterator.next();
            Map<String,Object> pollutionMap = new HashMap<>();
            String pollution = entry.getKey();
            Integer days = entry.getValue();
            Double proportionTmp = MathUtils.division(Double.valueOf(days),Double.valueOf(cityAqiDailies.size()),3);
            Double proprtionD = MathUtils.mul(proportionTmp,100);
            String proportion = proprtionD.toString()+"%";
            pollutionMap.put("proportion",proportion);
            pollutionMap.put("pollution",pollution);
            pollutionMap.put("days",days);
            valueMap.add(pollutionMap);
        }
        //封装返回对象
        PollutionLevelProportionDTO dto = new PollutionLevelProportionDTO();
        dto.setTime(time);
        dto.setValues(valueMap);
        return dto;
    }
}