package cn.iocoder.yudao.module.erp.service.purchase;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.number.MoneyUtils;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.bpm.enums.task.BpmTaskStatusEnum;
import cn.iocoder.yudao.module.erp.controller.admin.purchase.vo.order.ErpPurchaseOrderPageReqVO;
import cn.iocoder.yudao.module.erp.controller.admin.purchase.vo.order.ErpPurchaseOrderSaveReqVO;
import cn.iocoder.yudao.module.erp.dal.dataobject.purchase.ErpPurchaseOrderDO;
import cn.iocoder.yudao.module.erp.dal.dataobject.purchase.ErpPurchaseOrderItemDO;
import cn.iocoder.yudao.module.erp.dal.dataobject.purchase.ErpPurchaseRequestDO;
import cn.iocoder.yudao.module.erp.dal.dataobject.purchase.ErpPurchaseRequestItemDO;
import cn.iocoder.yudao.module.erp.dal.mysql.purchase.ErpPurchaseOrderItemMapper;
import cn.iocoder.yudao.module.erp.dal.mysql.purchase.ErpPurchaseOrderMapper;
import cn.iocoder.yudao.module.erp.dal.mysql.purchase.ErpPurchaseRequestItemMapper;
import cn.iocoder.yudao.module.erp.dal.mysql.purchase.ErpPurchaseRequestMapper;
import cn.iocoder.yudao.module.erp.dal.redis.no.ErpNoRedisDAO;
import cn.iocoder.yudao.module.erp.enums.ErpAuditStatus;
import cn.iocoder.yudao.module.erp.enums.ErpPurchaseOrderInStatusEnum;
import cn.iocoder.yudao.module.erp.enums.ErpPurchaseOrderStatusEnum;
import cn.iocoder.yudao.module.erp.service.finance.ErpAccountService;
import cn.iocoder.yudao.module.mes.api.arrivalnotice.MesArrivalNoticeApi;
import cn.iocoder.yudao.module.system.api.approval.ApprovalConfigApi;
import cn.iocoder.yudao.module.system.api.storage.StorageAttachmentApi;
import cn.iocoder.yudao.module.system.api.user.AdminUserApi;
import cn.iocoder.yudao.module.system.api.user.dto.AdminUserRespDTO;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.math.BigDecimal;
import java.util.*;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.*;
import static cn.iocoder.yudao.framework.security.core.util.SecurityFrameworkUtils.getLoginUserId;
import static cn.iocoder.yudao.module.erp.enums.ErrorCodeConstants.*;

/**
 * ERP 采购订单 Service 实现类
 *
 * @author 超级管理员
 */
@Service
@Validated
@Slf4j
public class ErpPurchaseOrderServiceImpl implements ErpPurchaseOrderService {

    /**
     * 采购订单审批业务类型编码（对应 system_approval_config.biz_type）
     *
     * 注意：改造为轻量级状态机审批前，此处原为 "purchase_request_approve"，
     * 与采购申请（ErpPurchaseRequestServiceImpl）的 BPM 分类编码完全相同，
     * 导致采购订单查询审批流程时会命中采购申请的流程定义，两者互相串用。
     * 现更正为采购订单专属编码。
     */
    private static final String PURCHASE_ORDER_APPROVE_BIZ_TYPE = "erp_purchase_order_approve";

    @Resource
    private ErpPurchaseOrderMapper purchaseOrderMapper;
    @Resource
    private ErpPurchaseOrderItemMapper purchaseOrderItemMapper;

    @Resource
    private ErpNoRedisDAO noRedisDAO;

    @Resource
    private ErpSupplierService supplierService;
    @Resource
    private ErpAccountService accountService;

    @Resource
    private ApprovalConfigApi approvalConfigApi;
    @Resource
    private AdminUserApi adminUserApi;

    @Resource
    @Lazy
    private MesArrivalNoticeApi arrivalNoticeApi;

    @Resource
    private ErpPurchaseRequestItemMapper purchaseRequestItemMapper;
    @Resource
    private ErpPurchaseRequestMapper purchaseRequestMapper;

    @Resource
    private StorageAttachmentApi storageAttachmentApi;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Long createPurchaseOrder(ErpPurchaseOrderSaveReqVO createReqVO) {
        // 1.1 校验订单项的有效性
        List<ErpPurchaseOrderItemDO> purchaseOrderItems = validatePurchaseOrderItems(createReqVO.getItems());
        // 1.2 校验供应商
        supplierService.validateSupplier(createReqVO.getSupplierId());
        // 1.3 校验结算账户
        if (createReqVO.getAccountId() != null) {
            accountService.validateAccount(createReqVO.getAccountId());
        }
        // 1.4 生成订单号，并校验唯一性
        String no = noRedisDAO.generate(ErpNoRedisDAO.PURCHASE_ORDER_NO_PREFIX);
        if (purchaseOrderMapper.selectByNo(no) != null) {
            throw exception(PURCHASE_ORDER_NO_EXISTS);
        }

        // 2.1 插入订单（采购订单创建后为【未提交】状态，需提交进入审批流程）
        ErpPurchaseOrderDO purchaseOrder = BeanUtils.toBean(createReqVO, ErpPurchaseOrderDO.class, in -> in
                .setNo(no).setStatus(ErpPurchaseOrderStatusEnum.DRAFT.getStatus())
                .setInCount(BigDecimal.ZERO).setInStatus(ErpPurchaseOrderInStatusEnum.NOT_IN.getStatus()));
        calculateTotalPrice(purchaseOrder, purchaseOrderItems);
        purchaseOrderMapper.insert(purchaseOrder);
        // 2.2 插入订单项
        purchaseOrderItems.forEach(o -> o.setOrderId(purchaseOrder.getId()));
        purchaseOrderItemMapper.insertBatch(purchaseOrderItems);
        // 2.3 绑定附件
        storageAttachmentApi.bindAttachments("file", "erp_purchase_order",
                purchaseOrder.getId(), createReqVO.getBlobIds());
        return purchaseOrder.getId();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updatePurchaseOrder(ErpPurchaseOrderSaveReqVO updateReqVO) {
        // 1.1 校验存在
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(updateReqVO.getId());
        // 已审核状态不允许修改
        if (ErpPurchaseOrderStatusEnum.APPROVE.getStatus().equals(purchaseOrder.getStatus())) {
            throw exception(PURCHASE_ORDER_UPDATE_FAIL_APPROVE, purchaseOrder.getNo());
        }
        // 审批中不允许修改：需先由审批人「审核不通过」退回，才能重新修改并提交
        if (ErpPurchaseOrderStatusEnum.PROCESS.getStatus().equals(purchaseOrder.getStatus())) {
            throw exception(PURCHASE_ORDER_UPDATE_FAIL_PROCESS, purchaseOrder.getNo());
        }
        // 1.2 校验供应商
        supplierService.validateSupplier(updateReqVO.getSupplierId());
        // 1.3 校验结算账户
        if (updateReqVO.getAccountId() != null) {
            accountService.validateAccount(updateReqVO.getAccountId());
        }
        // 1.4 校验订单项的有效性
        List<ErpPurchaseOrderItemDO> purchaseOrderItems = validatePurchaseOrderItems(updateReqVO.getItems());

        // 2.1 更新订单
        ErpPurchaseOrderDO updateObj = BeanUtils.toBean(updateReqVO, ErpPurchaseOrderDO.class);
        calculateTotalPrice(updateObj, purchaseOrderItems);
        purchaseOrderMapper.updateById(updateObj);
        // 2.2 更新订单项
        updatePurchaseOrderItemList(updateReqVO.getId(), purchaseOrderItems);
        // 2.3 更新附件
        storageAttachmentApi.updateAttachments("file", "erp_purchase_order", updateReqVO.getId(), updateReqVO.getBlobIds());
    }

    private void calculateTotalPrice(ErpPurchaseOrderDO purchaseOrder, List<ErpPurchaseOrderItemDO> purchaseOrderItems) {
        purchaseOrder.setTotalCount(getSumValue(purchaseOrderItems, ErpPurchaseOrderItemDO::getCount, BigDecimal::add));
        purchaseOrder.setTotalProductPrice(getSumValue(purchaseOrderItems, ErpPurchaseOrderItemDO::getTotalPrice, BigDecimal::add, BigDecimal.ZERO));
        purchaseOrder.setTotalTaxPrice(getSumValue(purchaseOrderItems, ErpPurchaseOrderItemDO::getTaxPrice, BigDecimal::add, BigDecimal.ZERO));
        purchaseOrder.setTotalPrice(purchaseOrder.getTotalProductPrice().add(purchaseOrder.getTotalTaxPrice()));
        // 计算优惠价格
        if (purchaseOrder.getDiscountPercent() == null) {
            purchaseOrder.setDiscountPercent(BigDecimal.ZERO);
        }
        purchaseOrder.setDiscountPrice(MoneyUtils.priceMultiplyPercent(purchaseOrder.getTotalPrice(), purchaseOrder.getDiscountPercent()));
        purchaseOrder.setTotalPrice(purchaseOrder.getTotalPrice().subtract(purchaseOrder.getDiscountPrice()));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updatePurchaseOrderStatus(Long id, Integer status) {
        boolean approve = ErpAuditStatus.APPROVE.getStatus().equals(status);
        // 1.1 校验存在
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(id);
        // 1.1.1 审核通过属于审批动作，必须由配置内的审批人执行（服务端强制，避免绕过审核按钮自助通过）
        if (approve) {
            approvalConfigApi.validateApprover(PURCHASE_ORDER_APPROVE_BIZ_TYPE, getLoginUserId());
        }
        // 1.2 校验状态
        if (purchaseOrder.getStatus().equals(status)) {
            throw exception(approve ? PURCHASE_ORDER_APPROVE_FAIL : PURCHASE_ORDER_PROCESS_FAIL);
        }
        // 1.3 存在采购入库单，无法反审核
        BigDecimal inCount = purchaseOrder.getInCount();
        if (!approve && inCount != null && inCount.compareTo(BigDecimal.ZERO) > 0) {
            throw exception(PURCHASE_ORDER_PROCESS_FAIL_EXISTS_IN);
        }
        // 1.4 存在采购退货单，无法反审核
        BigDecimal returnCount = purchaseOrder.getReturnCount();
        if (!approve && returnCount != null && returnCount.compareTo(BigDecimal.ZERO) > 0) {
            throw exception(PURCHASE_ORDER_PROCESS_FAIL_EXISTS_RETURN);
        }

        // 2. 更新状态
        int updateCount = purchaseOrderMapper.updateByIdAndStatus(id, purchaseOrder.getStatus(),
                new ErpPurchaseOrderDO().setStatus(status));
        if (updateCount == 0) {
            throw exception(approve ? PURCHASE_ORDER_APPROVE_FAIL : PURCHASE_ORDER_PROCESS_FAIL);
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitPurchaseOrder(Long id) {
        // 1.1 校验存在
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(id);
        // 1.2 只有【未提交】或【审核不通过】才允许提交
        if (!ErpPurchaseOrderStatusEnum.DRAFT.getStatus().equals(purchaseOrder.getStatus())
                && !ErpPurchaseOrderStatusEnum.REJECT.getStatus().equals(purchaseOrder.getStatus())) {
            throw exception(PURCHASE_ORDER_SUBMIT_FAIL_NOT_ALLOWED);
        }
        // 1.3 必须配置订单项
        List<ErpPurchaseOrderItemDO> items = purchaseOrderItemMapper.selectListByOrderId(id);
        if (CollUtil.isEmpty(items)) {
            throw exception(PURCHASE_ORDER_SUBMIT_FAIL_ITEM_EMPTY);
        }

        // 2. 校验审批已开启且配置了有效审批人（未开启审批时不允许提交）
        approvalConfigApi.validateApprovalEnabledAndGetApprovers(PURCHASE_ORDER_APPROVE_BIZ_TYPE);

        // 3. 置为审批中，并清空上一轮审核信息，避免驳回原因残留
        purchaseOrderMapper.submitAndResetAuditInfo(id, ErpPurchaseOrderStatusEnum.PROCESS.getStatus());
    }

    @Override
    public Set<Long> getPurchaseOrderApproverUserIds() {
        return approvalConfigApi.getApproverUserIds(PURCHASE_ORDER_APPROVE_BIZ_TYPE);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void auditPurchaseOrder(Long id, Boolean pass, String reviewRemark) {
        // 1.1 校验存在 + 审批中状态
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(id);
        if (!ErpPurchaseOrderStatusEnum.PROCESS.getStatus().equals(purchaseOrder.getStatus())) {
            throw exception(PURCHASE_ORDER_AUDIT_FAIL_NOT_PROCESS);
        }
        // 1.2 校验当前登录人是配置的审批人（或签：任一人审核即可）
        Long userId = getLoginUserId();
        approvalConfigApi.validateApprover(PURCHASE_ORDER_APPROVE_BIZ_TYPE, userId);

        // 2. 审核不通过：必须填写驳回原因，单据退回后可编辑并重新提交
        if (!Boolean.TRUE.equals(pass)) {
            if (StrUtil.isBlank(reviewRemark)) {
                throw exception(PURCHASE_ORDER_AUDIT_REJECT_REASON_REQUIRED);
            }
            purchaseOrderMapper.auditPurchaseOrder(id, ErpPurchaseOrderStatusEnum.REJECT.getStatus(),
                    userId, getUserNickname(userId), reviewRemark);
            return;
        }

        // 3. 审核通过
        purchaseOrderMapper.auditPurchaseOrder(id, ErpPurchaseOrderStatusEnum.APPROVE.getStatus(),
                userId, getUserNickname(userId), reviewRemark);
    }

    /**
     * 获取用户昵称，用于冗余存储审核人姓名
     */
    private String getUserNickname(Long userId) {
        if (userId == null) {
            return null;
        }
        AdminUserRespDTO user = adminUserApi.getUser(userId);
        return user == null ? null : user.getNickname();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updatePurchaseOrderAuditStatus(Long id, Integer bpmResult) {
        // 1. 校验存在
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(id);
        if (!ErpPurchaseOrderStatusEnum.PROCESS.getStatus().equals(purchaseOrder.getStatus())) {
            log.warn("[updatePurchaseOrderAuditStatus] 采购订单({}) 不处于审批中状态", id);
            return;
        }

        // 2. 根据审批结果更新状态
        Integer newStatus = convertBpmResultToAuditStatus(bpmResult);
        if (newStatus != null) {
            purchaseOrderMapper.updateById(new ErpPurchaseOrderDO()
                    .setId(id).setStatus(newStatus));
        }
    }

    /**
     * 转换 BPM 审批结果为审核状态
     *
     * 已废弃：采购订单不再走 BPM 流程，本方法仅为历史代码保留，不再被调用。
     */
    @Deprecated
    private Integer convertBpmResultToAuditStatus(Integer bpmResult) {
        if (BpmTaskStatusEnum.APPROVE.getStatus().equals(bpmResult)) {
            return ErpPurchaseOrderStatusEnum.APPROVE.getStatus();
        } else if (BpmTaskStatusEnum.REJECT.getStatus().equals(bpmResult)) {
            return ErpPurchaseOrderStatusEnum.REJECT.getStatus();
        } else if (BpmTaskStatusEnum.CANCEL.getStatus().equals(bpmResult)) {
            return ErpPurchaseOrderStatusEnum.CANCEL.getStatus();
        }
        return null;
    }

    private List<ErpPurchaseOrderItemDO> validatePurchaseOrderItems(List<ErpPurchaseOrderSaveReqVO.Item> list) {
        // 转化为 ErpPurchaseOrderItemDO 列表（产品验证已移除）
        return convertList(list, o -> BeanUtils.toBean(o, ErpPurchaseOrderItemDO.class, item -> {
            item.setTotalPrice(MoneyUtils.priceMultiply(item.getProductPrice(), item.getCount()));
            if (item.getTotalPrice() == null) {
                return;
            }
            if (item.getTaxPercent() != null) {
                item.setTaxPrice(MoneyUtils.priceMultiplyPercent(item.getTotalPrice(), item.getTaxPercent()));
            }
        }));
    }

    private void updatePurchaseOrderItemList(Long id, List<ErpPurchaseOrderItemDO> newList) {
        // 第一步，对比新老数据，获得添加、修改、删除的列表
        List<ErpPurchaseOrderItemDO> oldList = purchaseOrderItemMapper.selectListByOrderId(id);
        List<List<ErpPurchaseOrderItemDO>> diffList = diffList(oldList, newList,
                (oldVal, newVal) -> oldVal.getId().equals(newVal.getId()));

        // 第二步，批量添加、修改、删除
        if (CollUtil.isNotEmpty(diffList.get(0))) {
            diffList.get(0).forEach(o -> o.setOrderId(id));
            purchaseOrderItemMapper.insertBatch(diffList.get(0));
        }
        if (CollUtil.isNotEmpty(diffList.get(1))) {
            purchaseOrderItemMapper.updateBatch(diffList.get(1));
        }
        if (CollUtil.isNotEmpty(diffList.get(2))) {
            purchaseOrderItemMapper.deleteByIds(convertList(diffList.get(2), ErpPurchaseOrderItemDO::getId));
        }
    }

    @Override
    public void updatePurchaseOrderInCount(Long id, Map<Long, BigDecimal> inCountMap) {
        List<ErpPurchaseOrderItemDO> orderItems = purchaseOrderItemMapper.selectListByOrderId(id);
        // 1. 更新每个采购订单项
        orderItems.forEach(item -> {
            BigDecimal inCount = inCountMap.getOrDefault(item.getId(), BigDecimal.ZERO);
            if (item.getInCount().equals(inCount)) {
                return;
            }
            if (inCount.compareTo(item.getCount()) > 0) {
                throw exception(PURCHASE_ORDER_ITEM_IN_FAIL_PRODUCT_EXCEED,
                        "产品ID:" + item.getProductId(), item.getCount());
            }
            purchaseOrderItemMapper.updateById(new ErpPurchaseOrderItemDO().setId(item.getId()).setInCount(inCount));
        });
        // 2. 更新采购订单
        BigDecimal totalInCount = getSumValue(inCountMap.values(), value -> value, BigDecimal::add, BigDecimal.ZERO);
        purchaseOrderMapper.updateById(new ErpPurchaseOrderDO().setId(id).setInCount(totalInCount));
    }

    @Override
    public void updatePurchaseOrderReturnCount(Long orderId, Map<Long, BigDecimal> returnCountMap) {
        List<ErpPurchaseOrderItemDO> orderItems = purchaseOrderItemMapper.selectListByOrderId(orderId);
        // 1. 更新每个采购订单项
        orderItems.forEach(item -> {
            BigDecimal returnCount = returnCountMap.getOrDefault(item.getId(), BigDecimal.ZERO);
            if (item.getReturnCount().equals(returnCount)) {
                return;
            }
            if (returnCount.compareTo(item.getInCount()) > 0) {
                throw exception(PURCHASE_ORDER_ITEM_RETURN_FAIL_IN_EXCEED,
                        "产品ID:" + item.getProductId(), item.getInCount());
            }
            purchaseOrderItemMapper.updateById(new ErpPurchaseOrderItemDO().setId(item.getId()).setReturnCount(returnCount));
        });
        // 2. 更新采购订单
        BigDecimal totalReturnCount = getSumValue(returnCountMap.values(), value -> value, BigDecimal::add, BigDecimal.ZERO);
        purchaseOrderMapper.updateById(new ErpPurchaseOrderDO().setId(orderId).setReturnCount(totalReturnCount));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deletePurchaseOrder(List<Long> ids) {
        // 1. 校验不处于已审批
        List<ErpPurchaseOrderDO> purchaseOrders = purchaseOrderMapper.selectByIds(ids);
        if (CollUtil.isEmpty(purchaseOrders)) {
            return;
        }
        purchaseOrders.forEach(purchaseOrder -> {
            if (ErpAuditStatus.APPROVE.getStatus().equals(purchaseOrder.getStatus())) {
                throw exception(PURCHASE_ORDER_DELETE_FAIL_APPROVE, purchaseOrder.getNo());
            }
        });

        // 2. 遍历删除
        purchaseOrders.forEach(purchaseOrder -> {
            // 2.1 删除附件
            storageAttachmentApi.deleteAttachmentsByRecord("erp_purchase_order", purchaseOrder.getId());
            // 2.2 删除订单
            purchaseOrderMapper.deleteById(purchaseOrder.getId());
            // 2.3 删除订单项
            purchaseOrderItemMapper.deleteByOrderId(purchaseOrder.getId());
        });
    }

    private ErpPurchaseOrderDO validatePurchaseOrderExists(Long id) {
        ErpPurchaseOrderDO purchaseOrder = purchaseOrderMapper.selectById(id);
        if (purchaseOrder == null) {
            throw exception(PURCHASE_ORDER_NOT_EXISTS);
        }
        return purchaseOrder;
    }

    @Override
    public ErpPurchaseOrderDO getPurchaseOrder(Long id) {
        return purchaseOrderMapper.selectById(id);
    }

    @Override
    public ErpPurchaseOrderDO validatePurchaseOrder(Long id) {
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrderExists(id);
        if (ObjectUtil.notEqual(purchaseOrder.getStatus(), ErpAuditStatus.APPROVE.getStatus())) {
            throw exception(PURCHASE_ORDER_NOT_APPROVE);
        }
        return purchaseOrder;
    }

    @Override
    public PageResult<ErpPurchaseOrderDO> getPurchaseOrderPage(ErpPurchaseOrderPageReqVO pageReqVO) {
        return purchaseOrderMapper.selectPage(pageReqVO);
    }

    // ==================== 订单项 ====================

    @Override
    public List<ErpPurchaseOrderItemDO> getPurchaseOrderItemListByOrderId(Long orderId) {
        return purchaseOrderItemMapper.selectListByOrderId(orderId);
    }

    @Override
    public List<ErpPurchaseOrderItemDO> getPurchaseOrderItemListByOrderIds(Collection<Long> orderIds) {
        if (CollUtil.isEmpty(orderIds)) {
            return Collections.emptyList();
        }
        return purchaseOrderItemMapper.selectListByOrderIds(orderIds);
    }

    @Override
    public List<ErpPurchaseOrderDO> getPurchaseOrderListBySupplierIdAndStatus(Long supplierId, Integer status) {
        if (supplierId == null) {
            return Collections.emptyList();
        }
        return purchaseOrderMapper.selectList(supplierId, status);
    }

    @Override
    public List<ErpPurchaseOrderDO> getPurchaseOrderList(List<Long> ids) {
        if (CollUtil.isEmpty(ids)) {
            return Collections.emptyList();
        }
        return purchaseOrderMapper.selectByIds(ids);
    }

    @Override
    public List<ErpPurchaseOrderDO> getPurchaseOrderListBySource(Integer sourceType, Long sourceId) {
        if (sourceType == null || sourceId == null) {
            return Collections.emptyList();
        }
        return purchaseOrderMapper.selectListBySource(sourceType, sourceId);
    }

    @Override
    public void updatePurchaseOrderInStatus(Long orderId) {
        // 1. 获取采购订单
        ErpPurchaseOrderDO order = validatePurchaseOrderExists(orderId);
        // 2. 获取采购订单明细
        List<ErpPurchaseOrderItemDO> items = purchaseOrderItemMapper.selectListByOrderId(orderId);
        if (CollUtil.isEmpty(items)) {
            return;
        }
        // 3. 计算入库状态和总入库数量
        int inStatus = calculateInStatus(items);
        BigDecimal totalInCount = calculateTotalInCount(items);
        // 4. 更新采购订单入库状态和入库数量
        purchaseOrderMapper.updateById(new ErpPurchaseOrderDO()
                .setId(orderId).setInStatus(inStatus).setInCount(totalInCount));

        // 5. 回写采购申请明细的入库数量和采购申请的入库状态
        updatePurchaseRequestInStatus(items, inStatus);
    }

    /**
     * 计算总入库数量
     */
    private BigDecimal calculateTotalInCount(List<ErpPurchaseOrderItemDO> items) {
        BigDecimal total = BigDecimal.ZERO;
        for (ErpPurchaseOrderItemDO item : items) {
            if (item.getInCount() != null) {
                total = total.add(item.getInCount());
            }
        }
        return total;
    }

    /**
     * 回写采购申请入库数量和入库状态
     *
     * @param orderItems 采购订单明细列表
     * @param orderInStatus 采购订单入库状态
     */
    private void updatePurchaseRequestInStatus(List<ErpPurchaseOrderItemDO> orderItems, int orderInStatus) {
        // 获取所有关联的采购申请明细 ID
        Set<Long> requestItemIds = new HashSet<>();
        for (ErpPurchaseOrderItemDO item : orderItems) {
            if (item.getRequestItemId() != null) {
                requestItemIds.add(item.getRequestItemId());
            }
        }
        if (requestItemIds.isEmpty()) {
            return;
        }

        // 更新采购申请明细的入库数量
        for (ErpPurchaseOrderItemDO orderItem : orderItems) {
            if (orderItem.getRequestItemId() != null && orderItem.getInCount() != null) {
                purchaseRequestItemMapper.updateById(new ErpPurchaseRequestItemDO()
                        .setId(orderItem.getRequestItemId())
                        .setInCount(orderItem.getInCount()));
            }
        }

        // 获取采购申请明细，找到对应的采购申请 ID
        List<ErpPurchaseRequestItemDO> requestItems = purchaseRequestItemMapper.selectBatchIds(requestItemIds);
        if (CollUtil.isEmpty(requestItems)) {
            return;
        }
        Set<Long> requestIds = convertSet(requestItems, ErpPurchaseRequestItemDO::getRequestId);

        // 更新采购申请的入库状态
        for (Long requestId : requestIds) {
            purchaseRequestMapper.updateById(new ErpPurchaseRequestDO()
                    .setId(requestId)
                    .setInStatus(orderInStatus));
        }
    }

    /**
     * 计算入库状态
     *
     * @param items 采购订单明细列表
     * @return 入库状态
     */
    private int calculateInStatus(List<ErpPurchaseOrderItemDO> items) {
        boolean allIn = true;
        boolean anyIn = false;

        for (ErpPurchaseOrderItemDO item : items) {
            BigDecimal count = item.getCount() != null ? item.getCount() : BigDecimal.ZERO;
            BigDecimal inCount = item.getInCount() != null ? item.getInCount() : BigDecimal.ZERO;

            if (inCount.compareTo(BigDecimal.ZERO) > 0) {
                anyIn = true;
            }
            if (inCount.compareTo(count) < 0) {
                allIn = false;
            }
        }

        if (allIn) {
            return ErpPurchaseOrderInStatusEnum.ALL_IN.getStatus();
        } else if (anyIn) {
            return ErpPurchaseOrderInStatusEnum.PART_IN.getStatus();
        } else {
            return ErpPurchaseOrderInStatusEnum.NOT_IN.getStatus();
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Long confirmReceipt(Long id) {
        // 1. 校验采购订单存在且已审核
        ErpPurchaseOrderDO purchaseOrder = validatePurchaseOrder(id);

        // 2. 校验采购订单未全部入库
        if (ErpPurchaseOrderInStatusEnum.ALL_IN.getStatus().equals(purchaseOrder.getInStatus())) {
            throw exception(PURCHASE_ORDER_ALL_IN);
        }

        // 3. 调用 MES 接口生成到货通知单
        Long arrivalNoticeId = arrivalNoticeApi.generateArrivalNoticeFromPurchaseOrder(id);
        log.info("[confirmReceipt] 采购订单({}) 确认收货，生成到货通知单({})", id, arrivalNoticeId);

        return arrivalNoticeId;
    }

}