package com.ruoyi.staff.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.framework.web.domain.AjaxResult;
import com.ruoyi.production.bean.dto.UserAccountDto;
import com.ruoyi.production.bean.dto.UserProductionAccountingDto;
import com.ruoyi.production.service.SalesLedgerProductionAccountingService;
import com.ruoyi.project.system.domain.SysDept;
import com.ruoyi.project.system.domain.SysUser;
import com.ruoyi.project.system.mapper.SysDeptMapper;
import com.ruoyi.project.system.mapper.SysUserMapper;
import com.ruoyi.staff.controller.TaxCalculator;
import com.ruoyi.staff.mapper.*;
import com.ruoyi.staff.pojo.*;
import com.ruoyi.staff.service.SchemeApplicableStaffService;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * <p>
 * 社保方案适用人员表 服务实现类
 * </p>
 *
 * @author 芯导软件（江苏）有限公司
 * @since 2026-03-05 11:50:17
 */
@Service
@RequiredArgsConstructor
public class SchemeApplicableStaffServiceImpl extends ServiceImpl<SchemeApplicableStaffMapper, SchemeApplicableStaff> implements SchemeApplicableStaffService {

    private final SchemeApplicableStaffMapper schemeApplicableStaffMapper;
    private final SchemeInsuranceDetailMapper schemeInsuranceDetailMapper;
    private final SysUserMapper sysUserMapper;
    private final SysDeptMapper sysDeptMapper;
    private final StaffOnJobMapper staffOnJobMapper;
    private final PersonalShiftMapper personalShiftMapper;
    private final PersonalAttendanceLocationConfigMapper personalAttendanceLocationConfigMapper;
    private final SalesLedgerProductionAccountingService salesLedgerProductionAccountingService;
    private final SubsidyConfigurationMapper subsidyConfigurationMapper;
    private final StaffSalaryMainMapper staffSalaryMainMapper;
    private final StaffSalaryDetailMapper staffSalaryDetailMapper;


    @Override
    public AjaxResult listPage(Page page, SchemeApplicableStaff schemeApplicableStaff) {
        LambdaQueryWrapper<SchemeApplicableStaff> schemeApplicableStaffLambdaQueryWrapper = new LambdaQueryWrapper<>();
        if(schemeApplicableStaff != null){
            if(StringUtils.isNotEmpty(schemeApplicableStaff.getTitle())){
                schemeApplicableStaffLambdaQueryWrapper.like(SchemeApplicableStaff::getTitle, schemeApplicableStaff.getTitle());
            }
        }
        schemeApplicableStaffLambdaQueryWrapper.orderByDesc(SchemeApplicableStaff::getId);
        Page<SchemeApplicableStaff> page1 = schemeApplicableStaffMapper.selectPage(page, schemeApplicableStaffLambdaQueryWrapper);
        List<Long> collect = page1.getRecords().stream().map(SchemeApplicableStaff::getId).collect(Collectors.toList());
        if(CollectionUtils.isEmpty(collect)){
            return AjaxResult.success(page1);
        }
        List<SchemeInsuranceDetail> schemeInsuranceDetails = schemeInsuranceDetailMapper
                .selectList(new LambdaQueryWrapper<SchemeInsuranceDetail>()
                        .in(SchemeInsuranceDetail::getSchemeId, collect));
        page1.getRecords().forEach(item -> {
            item.setSchemeInsuranceDetailList(schemeInsuranceDetails
                    .stream()
                    .filter(detail -> detail.getSchemeId().equals(item.getId()))
                    .collect(Collectors.toList()));
            SysUser sysUser = sysUserMapper.selectUserById(item.getCreateUser().longValue());
            item.setCreateUserName(sysUser == null ? "未知" : sysUser.getNickName());
            // 获取部门信息
            String[] split = item.getDeptIds().split(",");
            List<SysDept> sysDepts = sysDeptMapper.selectList(new LambdaQueryWrapper<SysDept>()
                    .in(SysDept::getDeptId, Arrays.stream(split).map(Long::valueOf).collect(Collectors.toList())));
            if(!CollectionUtils.isEmpty(sysDepts)){
                item.setDeptNames(sysDepts.stream().map(SysDept::getDeptName).collect(Collectors.joining(",")));
            }
        });
        return AjaxResult.success(page1);
    }

    public void setSchemeApplicableStaffUserInfo(SchemeApplicableStaff schemeApplicableStaff) {
        // 通过部门获取人员id
        String[] split = schemeApplicableStaff.getDeptIds().split(",");
        List<StaffOnJob> staffOnJobs = staffOnJobMapper.selectList(new LambdaQueryWrapper<StaffOnJob>()
                .in(StaffOnJob::getSysDeptId, Arrays.stream(split).map(Long::valueOf).collect(Collectors.toList())));
        if(CollectionUtils.isEmpty(staffOnJobs)){
            throw new IllegalArgumentException("部门下无员工");
        }
        schemeApplicableStaff.setStaffIds(staffOnJobs
                .stream()
                .map(StaffOnJob::getId)
                .filter(Objects::nonNull)         // 过滤掉 null 值
                .map(String::valueOf)
                .collect(Collectors.joining( ",")));
        schemeApplicableStaff.setStaffNames(staffOnJobs.stream().map(StaffOnJob::getStaffName).collect(Collectors.joining(",")));
    }

    @Override
    public AjaxResult add(SchemeApplicableStaff schemeApplicableStaff) {
        if(schemeApplicableStaff == null){
            return AjaxResult.error("参数错误");
        }
        if(CollectionUtils.isEmpty(schemeApplicableStaff.getSchemeInsuranceDetailList())){
            return AjaxResult.error("请选择方案明细");
        }
        setSchemeApplicableStaffUserInfo(schemeApplicableStaff); //根据部门设置用户信息
        int insert = schemeApplicableStaffMapper.insert(schemeApplicableStaff);
        schemeApplicableStaff.getSchemeInsuranceDetailList().forEach(item -> {
            item.setSchemeId(schemeApplicableStaff.getId());
            schemeInsuranceDetailMapper.insert(item);
        });
        return AjaxResult.success(insert);
    }

    @Override
    public AjaxResult updateSchemeApplicableStaff(SchemeApplicableStaff schemeApplicableStaff) {
        if(schemeApplicableStaff == null){
            return AjaxResult.error("参数错误");
        }
        setSchemeApplicableStaffUserInfo(schemeApplicableStaff); //根据部门设置用户信息
        int update = schemeApplicableStaffMapper.updateById(schemeApplicableStaff);
        // 先删，重新绑定
        schemeInsuranceDetailMapper.delete(new LambdaQueryWrapper<SchemeInsuranceDetail>()
                .eq(SchemeInsuranceDetail::getSchemeId, schemeApplicableStaff.getId()));
        schemeApplicableStaff.getSchemeInsuranceDetailList().forEach(item -> {
            item.setSchemeId(schemeApplicableStaff.getId());
            schemeInsuranceDetailMapper.insert(item);
        });
        return AjaxResult.success(update);
    }

    @Override
    public AjaxResult delete(List<Long> ids) {
        if (CollectionUtils.isEmpty(ids)) {
            return AjaxResult.error("参数错误");
        }
        int delete = schemeApplicableStaffMapper.deleteBatchIds(ids);
        schemeInsuranceDetailMapper.delete(new LambdaQueryWrapper<SchemeInsuranceDetail>()
                .in(SchemeInsuranceDetail::getSchemeId, ids));
        return AjaxResult.success(delete);
    }

    /**
     * 通过员工id计算社保方案
     * @param id
     */
    public void calculateByEmployeeId(Integer id,Map<String, Object> map,String date) {
        // 1. 入参校验
        if (id == null) {
            return; // 或返回空列表，根据业务需求调整
        }
        Long staffId = id.longValue();
        // 社保金额
        BigDecimal socialPersonal = new BigDecimal("0.00");
        // 公积金金额
        BigDecimal fundPersonal = new BigDecimal("0.00");
        // 基本工资
        BigDecimal basicSalary = new BigDecimal("0.00");
        map.put("fundPersonal", fundPersonal); // 公积金
        map.put("socialPersonal", socialPersonal); // 社保金额
        map.put("socialSupplementAmount", BigDecimal.ZERO); // 社保补缴金额
        map.put("basicSalary", basicSalary); // 基本工资
        // 个税金额
        BigDecimal salaryTax = new BigDecimal("0.00");
        map.put("salaryTax", salaryTax);
        // 计件工资
        BigDecimal pieceSalary = new BigDecimal("0.00");
        map.put("pieceSalary", pieceSalary);
        // 计时工资
        BigDecimal hourlySalary = new BigDecimal("0.00");
        map.put("hourlySalary", hourlySalary);
        // 其他收入
        BigDecimal otherIncome = new BigDecimal("0.00");
        map.put("otherIncome", otherIncome);
        // 其他支出
        BigDecimal otherDeduct = new BigDecimal("0.00");
        map.put("otherDeduct", otherDeduct);
        // 应发工资
        BigDecimal grossSalary = new BigDecimal("0.00");
        map.put("grossSalary", grossSalary);
        // 应扣工资
        BigDecimal deductSalary = new BigDecimal("0.00");
        map.put("deductSalary", deductSalary);
        // 实发工资
        BigDecimal netSalary = new BigDecimal("0.00");
        map.put("netSalary", netSalary);
        // 根据排班数据计算白班天数和夜班天数
        BigDecimal dayDays = new BigDecimal("0.00");
        BigDecimal nightDays = new BigDecimal("0.00");

        // 查询当月排班记录
        List<PersonalShift> shiftList = personalShiftMapper.selectList(new LambdaQueryWrapper<PersonalShift>()
                .eq(PersonalShift::getStaffOnJobId, staffId)
                .like(PersonalShift::getWorkTime, date));

        if(!CollectionUtils.isEmpty(shiftList)){
            // 收集所有班次配置ID
            List<Integer> configIds = shiftList.stream()
                    .map(PersonalShift::getPersonalAttendanceLocationConfigId)
                    .filter(Objects::nonNull)
                    .collect(Collectors.toList());

            if(!CollectionUtils.isEmpty(configIds)){
                // 查询班次配置信息
                List<PersonalAttendanceLocationConfig> configList = personalAttendanceLocationConfigMapper.selectList(
                        new LambdaQueryWrapper<PersonalAttendanceLocationConfig>()
                                .in(PersonalAttendanceLocationConfig::getId, configIds));

                // 构建班次配置映射
                Map<Integer, String> configMap = configList.stream()
                        .collect(Collectors.toMap(
                                PersonalAttendanceLocationConfig::getId,
                                PersonalAttendanceLocationConfig::getShift,
                                (a, b) -> a));

                // 统计白班和夜班天数
                for (PersonalShift shift : shiftList) {
                    Integer configId = shift.getPersonalAttendanceLocationConfigId();
                    String shiftName = configMap.get(configId);
                    if(shiftName != null){
                        // 根据班次名称判断：包含"白"或"日"为白班，包含"夜"为夜班
                        if(shiftName.contains("白") || shiftName.contains("日")){
                            dayDays = dayDays.add(BigDecimal.ONE);
                        } else if(shiftName.contains("夜")){
                            nightDays = nightDays.add(BigDecimal.ONE);
                        }
                    }
                }
            }
        }
        map.put("dayDays", dayDays); // 白班天数
        map.put("nightDays", nightDays); // 夜班天数

        // 查询餐补和夜班补贴
        // 计算餐补（回族特有）和夜班补助
        BigDecimal mealAmount = new BigDecimal("0.00"); // 餐补
        BigDecimal nightAmount = new BigDecimal("0.00"); // 夜班补助

        // 获取餐补和夜班补贴标准（从补贴配置中获取）
        SubsidyConfiguration subsidyConfig = subsidyConfigurationMapper.selectOne(null);
        BigDecimal mealStandard = new BigDecimal("0.00"); // 餐补标准
        BigDecimal nightStandard = new BigDecimal("0.00"); // 夜班补贴标准
        if(subsidyConfig != null){
            mealStandard = subsidyConfig.getMealAmount() != null ? subsidyConfig.getMealAmount() : new BigDecimal("0.00");
            nightStandard = subsidyConfig.getNightAmount() != null ? subsidyConfig.getNightAmount() : new BigDecimal("0.00");
        }

        // 餐补：民族为回族特有，计算方式为(白班天数+夜班天数)*餐补标准
        StaffOnJob staffOnJobDto = staffOnJobMapper.selectById(staffId);
        if(staffOnJobDto == null){
            return;
        }

        String nation = staffOnJobDto.getNation();
        if("回族".equals(nation)){
            mealAmount = dayDays.add(nightDays).multiply(mealStandard);
        }

        // 夜班补助：夜班天数*夜班补贴标准
        nightAmount = nightDays.multiply(nightStandard);

        map.put("mealAmount", mealAmount); // 餐补
        map.put("nightAmount", nightAmount); // 夜班补助

        // 调用基本工资
        basicSalary = staffOnJobDto.getBasicSalary();
        map.put("basicSalary", basicSalary);
        // 应发工资（基本工资+餐补+夜班补助+其他收入）
        grossSalary = basicSalary.add(mealAmount).add(nightAmount).add(otherIncome);
        map.put("grossSalary", grossSalary);
        // 实发工资初始值
        netSalary = grossSalary;
        map.put("netSalary", netSalary);
        // 个税金额（无社保版）
        BigDecimal bigDecimal = TaxCalculator.calculateMonthlyTax(basicSalary, socialPersonal, fundPersonal);
        map.put("salaryTax", bigDecimal);
        // 计时工资 计件工资
        UserProductionAccountingDto userProductionAccountingDto = new UserProductionAccountingDto();
        userProductionAccountingDto.setUserId(getUidByStaffId(staffId));
        userProductionAccountingDto.setDate(date);
        UserAccountDto byUserId = salesLedgerProductionAccountingService.getByUserId(userProductionAccountingDto);
        if(byUserId != null){
            map.put("pieceSalary", byUserId.getAccountBalance());
            map.put("hourlySalary", byUserId.getAccount());
            // 应发 实发增加
            grossSalary = grossSalary.add(byUserId.getAccountBalance()).add(byUserId.getAccount());
            map.put("grossSalary", grossSalary);
            netSalary = netSalary.add(byUserId.getAccountBalance()).add(byUserId.getAccount());
            map.put("netSalary", netSalary);
        }
        // 2. 查询该人员对应的社保方案
        List<SchemeApplicableStaff> schemeList = schemeApplicableStaffMapper.selectSchemeByStaffId(staffId);
        if (CollectionUtils.isEmpty(schemeList)) {
            return; // 无匹配方案，返回空列表
        }
        YearMonth targetMonth = parseTargetMonth(date);
        SchemeApplicableStaff currentScheme = resolveCurrentScheme(schemeList, targetMonth);
        if (currentScheme == null) {
            return;
        }
        List<SchemeInsuranceDetail> currentDetailList = defaultIfNull(
                schemeApplicableStaffMapper.selectDetailBySchemeId(currentScheme.getId())
        );
        for (SchemeInsuranceDetail detail : currentDetailList) {
            BigDecimal amount = calculateInsuranceAmount(staffOnJobDto, detail);
            if ("公积金".equals(detail.getInsuranceType())) {
                fundPersonal = fundPersonal.add(amount);
            } else {
                socialPersonal = socialPersonal.add(amount);
            }
        }
        BigDecimal socialSupplementAmount = calculateSocialSupplementAmount(
                staffId,
                staffOnJobDto,
                targetMonth,
                currentScheme,
                currentDetailList,
                socialPersonal
        );
        if (socialSupplementAmount.compareTo(BigDecimal.ZERO) > 0) {
            socialPersonal = socialPersonal.add(socialSupplementAmount);
        }
        map.put("socialPersonal", socialPersonal);
        map.put("fundPersonal", fundPersonal);
        map.put("socialSupplementAmount", socialSupplementAmount);
        // 个税金额（社保版）
        bigDecimal = TaxCalculator.calculateMonthlyTax(basicSalary, socialPersonal, fundPersonal);
        map.put("salaryTax", bigDecimal);

        // 应扣工资 = 个税 + 公积金个人 + 社保个人 + 其他支出
        deductSalary = bigDecimal.add(fundPersonal).add(socialPersonal).add(otherDeduct);
        map.put("deductSalary", deductSalary);

        // 实发工资 = 应发工资 - 应扣工资
        netSalary = grossSalary.subtract(deductSalary);
        map.put("netSalary", netSalary);

    }

    /**
     * 通过员工Id获取用户id
     * @param staffId
     * @return
     */
    public Long getUidByStaffId(Long staffId){
        StaffOnJob staffOnJob = staffOnJobMapper.selectById(staffId);
        if(staffOnJob == null){
            return -1L; // 返回不存在Id
        }
        SysUser sysUser = sysUserMapper.selectOne(new LambdaQueryWrapper<SysUser>()
                .eq(SysUser::getUserName, staffOnJob.getStaffNo())
                .eq(SysUser::getDelFlag, "0")
                .last("limit 1"));
        if(sysUser == null){
            return -1L; // 返回不存在Id
        }
        return sysUser.getUserId();
    }

    /**
     * 计算单项保险金额
     */
    public BigDecimal calculateInsuranceAmount(StaffOnJob staffOnJobDto, SchemeInsuranceDetail detail) {
        if (staffOnJobDto == null || detail == null) {
            return BigDecimal.ZERO;
        }
        BigDecimal ratio = detail.getPersonalRatio() == null ? BigDecimal.ZERO : detail.getPersonalRatio();
        BigDecimal fixed = detail.getPersonalFixed() == null ? BigDecimal.ZERO : detail.getPersonalFixed();
        BigDecimal baseAmount;
        if (detail.getUseBasicSalary() == 1) {
            baseAmount = detail.getPaymentBase() == null ? BigDecimal.ZERO : detail.getPaymentBase();
        } else {
            baseAmount = staffOnJobDto.getBasicSalary() == null ? BigDecimal.ZERO : staffOnJobDto.getBasicSalary();
        }
        BigDecimal ratioAmount = baseAmount.multiply(ratio).divide(new BigDecimal("100"), 2, RoundingMode.HALF_UP);
        return ratioAmount.add(fixed);
    }

    private SchemeApplicableStaff resolveCurrentScheme(List<SchemeApplicableStaff> schemeList, YearMonth targetMonth) {
        if (CollectionUtils.isEmpty(schemeList)) {
            return null;
        }
        if (targetMonth == null) {
            return schemeList.get(0);
        }
        for (SchemeApplicableStaff scheme : schemeList) {
            if (scheme.getCreateTime() == null) {
                continue;
            }
            YearMonth schemeMonth = YearMonth.from(scheme.getCreateTime());
            if (!schemeMonth.isAfter(targetMonth)) {
                return scheme;
            }
        }
        return schemeList.get(schemeList.size() - 1);
    }

    /**
     * 计算社保补缴金额
     *
     * 业务逻辑：
     * 1. 只有在社保方案设置新增的当月才计算补缴金额，其余月份返回0
     * 2. 根据最新社保比例计算当月及以后应缴纳的金额标准
     * 3. 统计当年1月到当前月已缴纳的社保总额
     * 4. 用最新标准计算的期望总额与实际已缴纳金额的差额即为补缴金额
     *
     * @param staffId              员工ID
     * @param staffOnJobDto        员工在职信息（用于计算社保金额）
     * @param targetMonth          目标计算月份
     * @param currentScheme        当前社保方案
     * @param currentDetailList    当前社保方案明细列表
     * @param currentMonthSocialPersonal 当前月个人社保金额
     * @return 社保补缴金额（负数或0返回0）
     */
    private BigDecimal calculateSocialSupplementAmount(Long staffId,
                                                       StaffOnJob staffOnJobDto,
                                                       YearMonth targetMonth,
                                                       SchemeApplicableStaff currentScheme,
                                                       List<SchemeInsuranceDetail> currentDetailList,
                                                       BigDecimal currentMonthSocialPersonal) {
        // 1. 参数校验：任一必填参数为空，返回0
        if (staffId == null || staffOnJobDto == null || targetMonth == null || currentScheme == null || currentScheme.getCreateTime() == null) {
            return BigDecimal.ZERO;
        }

        // 2. 判断是否为社保方案新增当月
        //    只有新增社保设置的当月才计算补缴，其余月份返回0
        YearMonth schemeMonth = YearMonth.from(currentScheme.getCreateTime());
        if (!schemeMonth.equals(targetMonth)) {
            return BigDecimal.ZERO;
        }

        // 3. 计算最新月度社保个人金额（排除公积金）
        BigDecimal latestMonthlySocial = defaultIfNull(currentDetailList).stream()
                .filter(Objects::nonNull)
                .filter(detail -> !"公积金".equals(detail.getInsuranceType()))  // 排除公积金
                .map(detail -> calculateInsuranceAmount(staffOnJobDto, detail))   // 计算每项社保金额
                .reduce(BigDecimal.ZERO, BigDecimal::add);  // 累加求和

        // 如果最新月度社保金额为0或负数，无需补缴
        if (latestMonthlySocial.compareTo(BigDecimal.ZERO) <= 0) {
            return BigDecimal.ZERO;
        }

        // 4. 统计当年1月到当前月之前已缴纳的社保总额
        BigDecimal paidYtdSocial = sumPaidSocialPersonalBeforeMonth(staffId, targetMonth);

        // 5. 计算按最新标准应缴纳的年度总额
        //    期望总额 = 最新月度社保 × 当前月份（1-12）
        BigDecimal expectedYtdSocial = latestMonthlySocial.multiply(BigDecimal.valueOf(targetMonth.getMonthValue()));

        // 6. 计算补缴金额
        //    补缴金额 = 期望总额 - 已缴纳总额 - 当前月已计算的社保
        BigDecimal supplement = expectedYtdSocial.subtract(paidYtdSocial).subtract(defaultZero(currentMonthSocialPersonal));

        // 7. 返回结果：负数或0返回0，正数保留两位小数
        return supplement.compareTo(BigDecimal.ZERO) > 0 ? supplement.setScale(2, RoundingMode.HALF_UP) : BigDecimal.ZERO;
    }

    /**
     * 统计员工当年1月到目标月份之前已缴纳的社保个人部分总额
     *
     * 查询逻辑：
     * 1. 根据目标月份获取当年年份前缀（如 "2024-"）
     * 2. 查询该年份下所有早于目标月份的薪资主表记录
     * 3. 根据薪资主表ID查询对应的薪资明细表
     * 4. 按员工ID筛选并累加社保个人部分金额
     *
     * @param staffId      员工ID
     * @param targetMonth  目标月份（统计截止到该月份之前）
     * @return 已缴纳的社保个人部分总额
     */
    private BigDecimal sumPaidSocialPersonalBeforeMonth(Long staffId, YearMonth targetMonth) {
        // 1. 参数校验
        if (staffId == null || targetMonth == null) {
            return BigDecimal.ZERO;
        }

        // 2. 构建查询条件
        String yearPrefix = targetMonth.getYear() + "-";  // 年份前缀，如 "2024-"
        String currentMonthStr = targetMonth.format(DateTimeFormatter.ofPattern("yyyy-MM"));  // 目标月份字符串，如 "2024-03"

        // 3. 查询当年1月到目标月份之前的薪资主表
        List<StaffSalaryMain> salaryMainList = staffSalaryMainMapper.selectList(
                new LambdaQueryWrapper<StaffSalaryMain>()
                        .likeRight(StaffSalaryMain::getSalaryMonth, yearPrefix)  // 匹配当年所有月份
                        .lt(StaffSalaryMain::getSalaryMonth, currentMonthStr)    // 小于目标月份
        );
        if (CollectionUtils.isEmpty(salaryMainList)) {
            return BigDecimal.ZERO;
        }

        // 4. 提取薪资主表ID列表
        List<Long> mainIds = salaryMainList.stream()
                .map(StaffSalaryMain::getId)
                .filter(Objects::nonNull)
                .collect(Collectors.toList());
        if (CollectionUtils.isEmpty(mainIds)) {
            return BigDecimal.ZERO;
        }

        // 5. 查询对应的薪资明细表
        List<StaffSalaryDetail> detailList = staffSalaryDetailMapper.selectList(
                new LambdaQueryWrapper<StaffSalaryDetail>()
                        .in(StaffSalaryDetail::getMainId, mainIds)        // 根据主表ID查询
                        .eq(StaffSalaryDetail::getStaffOnJobId, staffId)  // 按员工ID筛选
        );
        if (CollectionUtils.isEmpty(detailList)) {
            return BigDecimal.ZERO;
        }

        // 6. 累加社保个人部分金额
        return detailList.stream()
                .map(StaffSalaryDetail::getSocialPersonal)  // 获取社保个人部分
                .filter(Objects::nonNull)
                .reduce(BigDecimal.ZERO, BigDecimal::add);  // 累加求和
    }

    private YearMonth parseTargetMonth(String date) {
        if (StringUtils.isEmpty(date)) {
            return null;
        }
        String normalized = date.length() >= 7 ? date.substring(0, 7) : date;
        try {
            return YearMonth.parse(normalized, DateTimeFormatter.ofPattern("yyyy-MM"));
        } catch (DateTimeParseException ex) {
            return null;
        }
    }

    private <T> List<T> defaultIfNull(List<T> list) {
        return list == null ? Collections.emptyList() : list;
    }

    private BigDecimal defaultZero(BigDecimal value) {
        return value == null ? BigDecimal.ZERO : value;
    }
}