package com.ruoyi.cwgl.service.impl;

import java.util.List;

import com.ruoyi.common.utils.DateUtils;
import javax.annotation.Resource;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.stereotype.Service;
import org.springframework.scheduling.annotation.Async;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ruoyi.common.utils.PageUtils;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.annotation.DataSource;
import com.ruoyi.common.enums.DataSourceType;
import com.ruoyi.common.core.service.BaseService;

import com.ruoyi.cwgl.mapper.ReceivableBillSettlementDetailMapper;
import com.ruoyi.cwgl.domain.ReceivableBillSettlementDetail;
import com.ruoyi.cwgl.service.IReceivableBillSettlementDetailService;
import com.ruoyi.cwgl.service.IReceivableBillManagementService;
import com.ruoyi.cwgl.service.IReceivableBillManagementLogService;
import com.ruoyi.cwgl.domain.ReceivableBillManagement;
import com.ruoyi.cwgl.domain.ReceivableBillManagementLog;
import com.ruoyi.common.core.text.Convert;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.SecurityUtils;
import java.math.BigDecimal;
import java.util.Set;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.HashSet;

/**
 * 应收账单结算明细Service业务层处理
 *
 * @author ruoyi
 * @date 2025-12-17
 */
@Service
@Transactional(rollbackFor = Exception.class)
public class ReceivableBillSettlementDetailServiceImpl  extends BaseService<ReceivableBillSettlementDetailMapper, ReceivableBillSettlementDetail> implements IReceivableBillSettlementDetailService
{
    protected final Logger logger = LoggerFactory.getLogger(getClass());
    @Resource
    private ReceivableBillSettlementDetailMapper receivableBillSettlementDetailMapper;
    
    @Resource
    private IReceivableBillManagementService receivableBillManagementService;
    
    @Resource
    private IReceivableBillManagementLogService receivableBillManagementLogService;


    /**
     * 查询应收账单结算明细
     *
     * @param id 应收账单结算明细ID
     * @return 应收账单结算明细
     */
    @DataSource(DataSourceType.SLAVE)
    @Override
    public ReceivableBillSettlementDetail selectReceivableBillSettlementDetailById(Integer id)
    {
        return receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailById(id);
    }

    /**
     * 查询应收账单结算明细 记录数
     *
     * @param receivableBillSettlementDetail 应收账单结算明细
     * @return 应收账单结算明细集合
     */
    @DataSource(DataSourceType.SLAVE)
    @Override
    public int selectReceivableBillSettlementDetailCount(ReceivableBillSettlementDetail receivableBillSettlementDetail)
    {
        return receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailCount(receivableBillSettlementDetail);
    }

    /**
     * 查询应收账单结算明细列表
     *
     * @param receivableBillSettlementDetail 应收账单结算明细
     * @return 应收账单结算明细
     */
    @DataSource(DataSourceType.SLAVE)
    @Override
    public List<ReceivableBillSettlementDetail> selectReceivableBillSettlementDetailList(ReceivableBillSettlementDetail receivableBillSettlementDetail)
    {
        return receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailList(receivableBillSettlementDetail);
    }

    /**
     * 查询应收账单结算明细列表 异步 导出
     *
     * @param receivableBillSettlementDetail 应收账单结算明细
     * @param exportKey 导出功能的唯一标识
     * @return 应收账单结算明细集合
     */
    @DataSource(DataSourceType.SLAVE)
    @Async
    @Override
    public void export(ReceivableBillSettlementDetail receivableBillSettlementDetail,String exportKey) {

        super.export(ReceivableBillSettlementDetail.class,exportKey,"receivableBillSettlementDetailData",(pageNum)->{
            PageUtils.startPage(pageNum, Constants.EXPORT_PATE_SIZE);
            return selectReceivableBillSettlementDetailList(receivableBillSettlementDetail);
        });
    }


    /**
     * 新增应收账单结算明细
     *
     * @param receivableBillSettlementDetail 应收账单结算明细
     * @return 结果
     */
    @Override
    public int insertReceivableBillSettlementDetail(ReceivableBillSettlementDetail receivableBillSettlementDetail)
    {
        // 1. 设置创建时间
        receivableBillSettlementDetail.setCreateTime(DateUtils.getNowDate());
        
        // 2. 插入结算明细记录
        int result = receivableBillSettlementDetailMapper.insertReceivableBillSettlementDetail(receivableBillSettlementDetail);
        
        // 3. 如果插入成功且billId不为空，则更新主表金额和状态
        if (result > 0 && receivableBillSettlementDetail.getBillId() != null) {
            updateReceivableBillAmountAndStatus(receivableBillSettlementDetail.getBillId());
            
            // 记录添加结算明细操作日志
            ReceivableBillManagement billManagement = receivableBillManagementService.selectReceivableBillManagementById(receivableBillSettlementDetail.getBillId());
            if (billManagement != null) {
                ReceivableBillManagementLog log = new ReceivableBillManagementLog();
                log.setBillId(receivableBillSettlementDetail.getBillId());
                log.setCreateBy(SecurityUtils.getUsername());
                log.setCreateTime(DateUtils.getNowDate());
                log.setOperation("添加结算明细，账单编号：" + billManagement.getSystemNo());
                receivableBillManagementLogService.insertReceivableBillManagementLog(log);
            }
        }
        
        return result;
    }
    
    /**
     * 更新应收账单主表的金额和状态
     * 
     * @param billId 应收账单ID
     */
    private void updateReceivableBillAmountAndStatus(Integer billId) {
        // 1. 查询应收账单主表记录
        ReceivableBillManagement billManagement = receivableBillManagementService.selectReceivableBillManagementById(billId);
        if (billManagement == null) {
            throw new ServiceException("应收账单主表记录不存在，ID：" + billId);
        }
        
        // 2. 查询该账单的所有结算明细记录
        ReceivableBillSettlementDetail queryDetail = new ReceivableBillSettlementDetail();
        queryDetail.setBillId(billId);
        List<ReceivableBillSettlementDetail> settlementDetails = receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailList(queryDetail);
        
        // 3. 计算总收款金额
        BigDecimal totalReceiptAmount = settlementDetails.stream()
                .map(ReceivableBillSettlementDetail::getReceiptAmount)
                .filter(amount -> amount != null)
                .reduce(BigDecimal.ZERO, BigDecimal::add);
        
        // 4. 验证金额不能为负数
        if (totalReceiptAmount.compareTo(BigDecimal.ZERO) < 0) {
            throw new ServiceException("收款金额不能为负数");
        }
        
        // 5. 计算待收金额（应结算金额 - 已收金额 - 减免金额）
        BigDecimal totalAmount = billManagement.getTotalAmount() != null ? billManagement.getTotalAmount() : BigDecimal.ZERO;
        BigDecimal discountAmount = billManagement.getDiscountAmount() != null ? billManagement.getDiscountAmount() : BigDecimal.ZERO;
        BigDecimal pendingAmount = totalAmount.subtract(totalReceiptAmount).subtract(discountAmount);
        
        // 6. 验证待收金额不能为负数
        if (pendingAmount.compareTo(BigDecimal.ZERO) < 0) {
            throw new ServiceException("待收金额不能为负数，当前计算值：" + pendingAmount);
        }
        
        // 7. 更新主表金额
        billManagement.setReceivedAmount(totalReceiptAmount);
        billManagement.setPendingAmount(pendingAmount);
        
        // 8. 根据待收金额更新状态
        if (pendingAmount.compareTo(BigDecimal.ZERO) == 0) {
            // 待收金额为0，状态改为3（已结算）
            billManagement.setStatus("3");
        } else {
            // 待收金额大于0，状态改为1（结算中）
            billManagement.setStatus("1");
        }
        
        // 9. 更新主表记录
        billManagement.setUpdateTime(DateUtils.getNowDate());
        receivableBillManagementService.updateReceivableBillManagement(billManagement);
    }

    /**
     * 新增应收账单结算明细[批量]
     *
     * @param receivableBillSettlementDetails 应收账单结算明细
     * @return 结果
     */
    @Override
    public int insertReceivableBillSettlementDetailBatch(List<ReceivableBillSettlementDetail> receivableBillSettlementDetails)
    {
        // 1. 设置创建时间
        for (ReceivableBillSettlementDetail detail : receivableBillSettlementDetails) {
            detail.setCreateTime(DateUtils.getNowDate());
        }
        
        // 2. 批量插入结算明细记录
        int rows = receivableBillSettlementDetailMapper.insertReceivableBillSettlementDetailBatch(receivableBillSettlementDetails);
        
        // 3. 如果插入成功，则更新相关主表金额和状态
        if (rows > 0) {
            // 获取所有不重复的billId
            Set<Integer> billIds = receivableBillSettlementDetails.stream()
                    .map(ReceivableBillSettlementDetail::getBillId)
                    .filter(Objects::nonNull)
                    .collect(Collectors.toSet());
            
            // 更新每个账单主表的金额和状态
            for (Integer billId : billIds) {
                updateReceivableBillAmountAndStatus(billId);
            }
            
            // 记录添加结算明细操作日志
            if (!billIds.isEmpty()) {
                for (Integer billId : billIds) {
                    ReceivableBillManagement billManagement = receivableBillManagementService.selectReceivableBillManagementById(billId);
                    if (billManagement != null) {
                        ReceivableBillManagementLog log = new ReceivableBillManagementLog();
                        log.setBillId(billId);
                        log.setCreateBy(SecurityUtils.getUsername());
                        log.setCreateTime(DateUtils.getNowDate());
                        
                        // 计算本次添加的明细数量
                        long detailCount = receivableBillSettlementDetails.stream()
                                .filter(detail -> billId.equals(detail.getBillId()))
                                .count();
                        
                        log.setOperation("添加" + detailCount + "条结算明细，账单编号：" + billManagement.getSystemNo());
                        receivableBillManagementLogService.insertReceivableBillManagementLog(log);
                    }
                }
            }
        }
        
        return rows;
    }

    /**
     * 修改应收账单结算明细
     *
     * @param receivableBillSettlementDetail 应收账单结算明细
     * @return 结果
     */
    @Override
    public int updateReceivableBillSettlementDetail(ReceivableBillSettlementDetail receivableBillSettlementDetail)
    {
        // 1. 获取修改前的记录，用于后续更新主表
        ReceivableBillSettlementDetail oldDetail = null;
        if (receivableBillSettlementDetail.getId() != null) {
            oldDetail = receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailById(receivableBillSettlementDetail.getId());
        }
        
        // 2. 设置更新时间
        receivableBillSettlementDetail.setUpdateTime(DateUtils.getNowDate());
        
        // 3. 更新结算明细记录
        int result = receivableBillSettlementDetailMapper.updateReceivableBillSettlementDetail(receivableBillSettlementDetail);
        
        // 4. 如果更新成功，则更新相关主表金额和状态
        if (result > 0) {
            // 获取需要更新的billId（优先使用新记录的billId，如果没有则使用旧记录的billId）
            Integer billId = receivableBillSettlementDetail.getBillId();
            if (billId == null && oldDetail != null) {
                billId = oldDetail.getBillId();
            }
            
            if (billId != null) {
                updateReceivableBillAmountAndStatus(billId);
            }
        }
        
        return result;
    }

    /**
     * 修改应收账单结算明细[批量]
     *
     * @param receivableBillSettlementDetails 应收账单结算明细
     * @return 结果
     */
    @Override
    public int updateReceivableBillSettlementDetailBatch(List<ReceivableBillSettlementDetail> receivableBillSettlementDetails){
        // 1. 设置更新时间
        for (ReceivableBillSettlementDetail detail : receivableBillSettlementDetails) {
            detail.setUpdateTime(DateUtils.getNowDate());
        }
        
        // 2. 批量更新结算明细记录
        int result = receivableBillSettlementDetailMapper.updateReceivableBillSettlementDetailBatch(receivableBillSettlementDetails);
        
        // 3. 如果更新成功，则更新相关主表金额和状态
        if (result > 0) {
            // 获取所有不重复的billId
            Set<Integer> billIds = receivableBillSettlementDetails.stream()
                    .map(ReceivableBillSettlementDetail::getBillId)
                    .filter(Objects::nonNull)
                    .collect(Collectors.toSet());
            
            // 更新每个账单主表的金额和状态
            for (Integer billId : billIds) {
                updateReceivableBillAmountAndStatus(billId);
            }
        }
        
        return result;
    }

    /**
     * 删除应收账单结算明细对象
     *
     * @param ids 需要删除的数据ID
     * @return 结果
     */
    @Override
    public int deleteReceivableBillSettlementDetailByIds(String ids)
    {
        return deleteReceivableBillSettlementDetailByIds(Convert.toIntArray(ids));
    }

    /**
     * 删除应收账单结算明细对象
     *
     *
     * @param ids 需要删除的数据ID
     * @return 结果
     */
    @Override
    public int deleteReceivableBillSettlementDetailByIds(Integer[] ids)
    {
        // 1. 获取删除前的记录，用于后续更新主表
        Set<Integer> billIds = new HashSet<>();
        for (Integer id : ids) {
            ReceivableBillSettlementDetail detail = receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailById(id);
            if (detail != null && detail.getBillId() != null) {
                billIds.add(detail.getBillId());
            }
        }
        
        // 2. 删除结算明细记录
        int result = receivableBillSettlementDetailMapper.deleteReceivableBillSettlementDetailByIds(ids);
        
        // 3. 如果删除成功，则更新相关主表金额和状态
        if (result > 0) {
            for (Integer billId : billIds) {
                updateReceivableBillAmountAndStatus(billId);
            }
        }
        
        return result;
    }

    /**
     * 删除应收账单结算明细信息
     *
     * @param id 应收账单结算明细ID
     * @return 结果
     */
    @Override
    public int deleteReceivableBillSettlementDetailById(Integer id)
    {
        // 1. 获取删除前的记录，用于后续更新主表
        Integer billId = null;
        ReceivableBillSettlementDetail detail = receivableBillSettlementDetailMapper.selectReceivableBillSettlementDetailById(id);
        if (detail != null && detail.getBillId() != null) {
            billId = detail.getBillId();
        }
        
        // 2. 删除结算明细记录
        int result = receivableBillSettlementDetailMapper.deleteReceivableBillSettlementDetailById(id);
        
        // 3. 如果删除成功，则更新相关主表金额和状态
        if (result > 0 && billId != null) {
            updateReceivableBillAmountAndStatus(billId);
        }
        
        return result;
    }
}