package com.welampiot.service.impl;

import com.welampiot.dao.NetCardInfoLogDao;
import com.welampiot.dto.NetCardInfoLogDTO;
import com.welampiot.service.NetCardInfoLogService;
import com.welampiot.utils.ToolUtils;
import com.welampiot.vo.NetCardLogVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.text.DecimalFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class NetCardInfoLogServiceImpl implements NetCardInfoLogService {

    @Autowired
    private NetCardInfoLogDao netCardInfoLogDao;

    @Override
    public NetCardLogVO getNetCardLogListByLogVO(NetCardLogVO netCardLogVO) {
        String nowDate = ToolUtils.getNowDate();
        String[] split = nowDate.split("-");
        String year = split[0];
        String month = split[1];
        String monthStr = year + "-" + month;
        if (netCardLogVO.getDataType() == 1) {
            return getNetCardLogListByLampIdAndYear(netCardLogVO.getLampId(), year, month);
        }
        return getNetCardLogListByLampIdAndMonth(netCardLogVO.getLampId(), year, monthStr);
    }

    @Override
    public NetCardLogVO getNetCardLogListByLampIdAndMonth(Integer lampId, String year, String month) {
        List<NetCardInfoLogDTO> logs = netCardInfoLogDao.getNetCardLogListByLampIdAndMonth(lampId, month);

        // 按日期分组，取每个日期的最后一笔记录
        Map<LocalDate, NetCardInfoLogDTO> dailyLogs = logs.stream()
                .collect(Collectors.toMap(
                        log -> parseLocalDate(log.getUpdateTime()),
                        log -> log,
                        (existing, replacement) -> existing.getUpdateTime().compareTo(replacement.getUpdateTime()) > 0 ? existing : replacement
                ));

        // 计算每天的流量使用量
        List<Object> dataList = new ArrayList<>();
        List<Object> dateList = new ArrayList<>();

        LocalDate firstDayOfMonth = LocalDate.parse(month + "-01", DateTimeFormatter.ofPattern("yyyy-MM-dd"));
        LocalDate lastDayOfMonth = firstDayOfMonth.withDayOfMonth(firstDayOfMonth.lengthOfMonth());

        DecimalFormat df = new DecimalFormat("0.##");
        for (LocalDate date = firstDayOfMonth; !date.isAfter(lastDayOfMonth); date = date.plusDays(1)) {
            NetCardInfoLogDTO currentLog = dailyLogs.get(date);
            NetCardInfoLogDTO previousLog = dailyLogs.get(date.minusDays(1));

            double usage = 0.0;
            if (currentLog != null) {
                if (previousLog == null) {
                    usage = currentLog.getUseGprs(); // 第一天的流量
                } else {
                    usage = currentLog.getUseGprs() - previousLog.getUseGprs();
                }
            }
            dataList.add(df.format(usage));
            dateList.add(date.toString());
        }

        NetCardLogVO netCardLogVO1 = new NetCardLogVO();
        netCardLogVO1.setDateList(dateList);
        netCardLogVO1.setDataList(dataList);
        return netCardLogVO1;
    }

    @Override
    public NetCardLogVO getNetCardLogListByLampIdAndYear(Integer lampId, String year, String month) {
        List<NetCardInfoLogDTO> logs = netCardInfoLogDao.getNetCardLogListByLampIdAndYear(lampId, year);

        // 创建一个包含所有月份的列表
        List<String> allMonths = new ArrayList<>();
        for (int i = 1; i <= 12; i++) {
            allMonths.add(String.format("%s-%02d", year, i));
        }

        // 将 logs 转换为 Map，键为月份，值为 NetCardInfoLogDTO
        Map<String, NetCardInfoLogDTO> monthlyLogs = logs.stream()
                .collect(Collectors.toMap(
                        log -> log.getUpdateTime().substring(0, 7), // 取前7个字符，即 "YYYY-MM"
                        log -> log,
                        (existing, replacement) -> existing.getUpdateTime().compareTo(replacement.getUpdateTime()) > 0 ? existing : replacement
                ));

        // 初始化 dataList 和 dateList
        List<Object> dataList = new ArrayList<>();
        List<Object> dateList = new ArrayList<>();

        DecimalFormat df = new DecimalFormat("0.##");
        // 遍历所有月份，填充 dataList 和 dateList
        for (String months : allMonths) {
            NetCardInfoLogDTO log = monthlyLogs.get(months);
            double usage = log != null ? log.getUseGprs() : 0.0;
            dataList.add(df.format(usage));
            dateList.add(months);
        }

        NetCardLogVO netCardLogVO = new NetCardLogVO();
        netCardLogVO.setDateList(dateList);
        netCardLogVO.setDataList(dataList);
        return netCardLogVO;
    }

    private LocalDate parseLocalDate(String dateStr) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        return LocalDate.parse(dateStr, formatter);
    }
}