package com.ruoyi.app.order;

import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson2.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.ruoyi.app.utils.ezPay.EzPay;
import com.ruoyi.app.utils.ezPay.EzPayConfig;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.system.domain.PosOrder;
import com.ruoyi.system.domain.PosOrderInvoice;
import com.ruoyi.system.domain.PosStore;
import com.ruoyi.system.domain.PosStoreEzpay;
import com.ruoyi.system.domain.InfoUser;
import com.ruoyi.system.domain.dto.ApplyInvoiceDto;
import com.ruoyi.system.domain.vo.PosOrderInvoiceVo;
import com.ruoyi.system.mapper.PosOrderInvoiceMapper;
import com.ruoyi.system.mapper.PosOrderMapper;
import com.ruoyi.system.mapper.PosStoreEzpayMapper;
import com.ruoyi.system.mapper.PosStoreMapper;
import com.ruoyi.system.service.IInfoUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * 订单电子发票 开票 / 作废 / 查询 业务（放 admin，因需调用 {@link EzPay}）。
 *
 * <p>开票链路（{@link #applyInvoice}）：校验订单归属/状态/支付 → 校验门店可开票（009 凭证 + 免用发票）
 * → 金额拆分（不含运费）→ 组装 ezPay issue 参数 + 逐商品明细 → 调 {@link EzPay#issueInvoice}
 * → 判读回应 → 落库。作废走 {@link EzPay#doPost} + invoice_invalid。
 *
 * @author ruoyi
 * @date 2026-06-16
 */
@Service
public class OrderInvoiceService {

    @Autowired
    private EzPay ezPay;

    @Autowired
    private PosOrderMapper posOrderMapper;

    @Autowired
    private PosStoreMapper posStoreMapper;

    @Autowired
    private PosStoreEzpayMapper posStoreEzpayMapper;

    @Autowired
    private PosOrderInvoiceMapper posOrderInvoiceMapper;
    @Autowired
    private IInfoUserService infoUserService;

    /** ezPay 接口根地址（从 application.yml 的 ezpay.base-url 注入，测试/正式在此切换） */
    @Value("${ezpay.base-url}")
    private String ezpayBaseUrl;

    /** 发票状态：0未开/1已开/2失败/3作废 */
    private static final int STATUS_NOT_ISSUED = 0;
    private static final int STATUS_ISSUED = 1;
    private static final int STATUS_FAILED = 2;
    private static final int STATUS_INVALID = 3;

    /** 订单完成态、已支付 */
    private static final long ORDER_STATE_DONE = 3L;
    private static final long ORDER_PAID = 1L;

    // ==================== US1/US2/US3：客户开票 ====================

    /**
     * 客户申请开票。校验 → 金额拆分 → 调 ezPay 即时开立 → 落库。
     * B2C/B2B/载具由 {@link #buildIssueData} 按 {@code category}/{@code carrierType} 分支处理。
     */
    public PosOrderInvoiceVo applyInvoice(ApplyInvoiceDto dto, Long currentUserId) {
        Long orderId = dto.getOrderId();
        PosOrder order = posOrderMapper.selectOne(new LambdaQueryWrapper<PosOrder>().eq(PosOrder::getDdId,orderId.toString()));
        if (order == null) {
            throw new ServiceException("订单不存在");
        }
        if (!Objects.equals(order.getUserId(), currentUserId)) {
            throw new ServiceException("无权操作该订单");
        }
        if (order.getState() == null || order.getState() != ORDER_STATE_DONE) {
            throw new ServiceException("订单未完成，暂不可开票");
        }
        if (order.getPayStatus() == null || order.getPayStatus() != ORDER_PAID) {
            throw new ServiceException("订单未支付，暂不可开票");
        }
        Long storeId = order.getMdId();
        PosStoreEzpay ez = assertInvoiceable(storeId);

        // 场景入参校验（B2B 统编 / B2C 邮箱 / 载具号码）
        validateInvoiceInput(dto);

        // 防重复开票
        PosOrderInvoice row = posOrderInvoiceMapper.selectOne(
                new LambdaQueryWrapper<PosOrderInvoice>().eq(PosOrderInvoice::getOrderId, orderId));
        if (row != null && Integer.valueOf(STATUS_ISSUED).equals(row.getInvoiceStatus())) {
            throw new ServiceException("该订单已开票，不可重复开票");
        }

        // 金额拆分（不含运费：invoiceTotal = amount - freight）
        int amount = order.getAmount() == null ? 0 : order.getAmount();
        int freight = (int) Math.round(order.getFreight() == null ? 0d : order.getFreight());
        int invoiceTotal = amount - freight;
        if (invoiceTotal <= 0) {
            throw new ServiceException("订单可开票金额异常，无法开票");
        }
        int sales = (int) Math.round(invoiceTotal / 1.05);
        int tax = invoiceTotal - sales;

        // 组装 ezPay issue 参数 + 调用
        Map<String, Object> inv = buildIssueData(dto, order, invoiceTotal, sales, tax);
        EzPayConfig cfg = new EzPayConfig(ez.getMerchantId(), ez.getHashKey(), ez.getHashIv());

        int newStatus;
        String invoiceNumber = null, randomNum = null, invoiceTransNo = null,
                invoiceBarCode = null, invoiceQrcodeL = null, invoiceQrcodeR = null, failReason = null;
        try {
            JSONObject resp = ezPay.issueInvoice(ezpayBaseUrl, cfg, inv);            String status = resp == null ? "" : resp.getString("Status");
            JSONObject result = resp == null ? null : resp.getJSONObject("Result");
            if ("SUCCESS".equals(status) && result != null && StrUtil.isNotBlank(result.getString("InvoiceNumber"))) {
                invoiceNumber = result.getString("InvoiceNumber");
                randomNum = result.getString("RandomNum");
                invoiceTransNo = result.getString("InvoiceTransNo");
                invoiceBarCode = result.getString("BarCode");
                invoiceQrcodeL = result.getString("QRcodeL");
                invoiceQrcodeR = result.getString("QRcodeR");
                newStatus = STATUS_ISSUED;
            } else {
                failReason = resp == null ? "ezPay 无回应" : (status + ":" + resp.getString("Message"));
                newStatus = STATUS_FAILED;
            }
        } catch (Exception e) {
            failReason = "ezPay 服务暂不可用：" + (e.getMessage() == null ? e.getClass().getSimpleName() : e.getMessage());
            newStatus = STATUS_FAILED;
        }

        // 落库（uk_order_id 兜底防并发重复）
        Date now = new Date();
        PosOrderInvoice saveRow = row == null ? new PosOrderInvoice() : row;
        saveRow.setOrderId(orderId);
        saveRow.setOrderNo(order.getDdId());
        saveRow.setStoreId(storeId);
        saveRow.setInvoiceCategory(dto.getCategory());
        saveRow.setBuyerName(dto.getBuyerName());
        saveRow.setBuyerUbn(dto.getBuyerUbn());
        saveRow.setBuyerEmail(dto.getBuyerEmail());
        saveRow.setCarrierType(dto.getCarrierType());
        saveRow.setCarrierNum(dto.getCarrierNum());
        saveRow.setTotalAmt(invoiceTotal);
        saveRow.setSalesAmt(sales);
        saveRow.setTaxAmt(tax);
        saveRow.setApplyTime(now);
        if (newStatus == STATUS_ISSUED) {
            saveRow.setInvoiceNumber(invoiceNumber);
            saveRow.setRandomNum(randomNum);
            saveRow.setInvoiceTransNo(invoiceTransNo);
            saveRow.setInvoiceBarCode(invoiceBarCode);
            saveRow.setInvoiceQrcodeL(invoiceQrcodeL);
            saveRow.setInvoiceQrcodeR(invoiceQrcodeR);
            saveRow.setIssueTime(now);
            saveRow.setFailReason(null);
        } else {
            saveRow.setFailReason(StrUtil.sub(failReason, 0, 480));
        }
        saveRow.setInvoiceStatus(newStatus);
        try {
            saveOrUpdate(saveRow);
        } catch (DuplicateKeyException dup) {
            throw new ServiceException("请勿重复提交开票申请");
        }

        return posOrderInvoiceMapper.selectInvoiceDetail(orderId);
    }

    /** 客户查询订单发票；门店不可开票时 invoiceStatus=null（客户端据此隐藏入口）。 */
    public PosOrderInvoiceVo getInvoice(Long orderId, Long currentUserId) {
        PosOrder order = posOrderMapper.selectPosOrderById(orderId);
        if (order == null || !Objects.equals(order.getUserId(), currentUserId)) {
            throw new ServiceException("订单不存在");
        }
        boolean can = canInvoice(order.getMdId());
        PosOrderInvoiceVo vo = posOrderInvoiceMapper.selectInvoiceDetail(orderId);
        if (vo == null) {
            vo = new PosOrderInvoiceVo();
            vo.setOrderId(orderId);
            vo.setOrderNo(order.getDdId());
            vo.setInvoiceStatus(can ? STATUS_NOT_ISSUED : null);
        } else if (!can) {
            vo.setInvoiceStatus(null);
        }
        return vo;
    }

    /** 商家端查询订单发票（校验商家为该订单门店归属人）。 */
    public PosOrderInvoiceVo getInvoiceForMerchant(Long orderId, Long merchantUserId) {
        requireOwnedOrder(orderId, merchantUserId);
        return posOrderInvoiceMapper.selectInvoiceDetail(orderId);
    }

    /** 商家端作废发票（校验归属后复用作废逻辑）。 */
    public int invalidForMerchant(Long orderId, String reason, Long merchantUserId) {
        requireOwnedOrder(orderId, merchantUserId);
        return invalid(orderId, reason);
    }

    /** 校验订单存在且属于该商家门店，返回订单；否则抛异常。 */
    private PosOrder requireOwnedOrder(Long orderId, Long merchantUserId) {
        PosOrder order = posOrderMapper.selectPosOrderById(orderId);
        if (order == null) {
            throw new ServiceException("订单不存在");
        }
        InfoUser user = infoUserService.getOne(
                new LambdaQueryWrapper<InfoUser>().eq(InfoUser::getUserId, merchantUserId));
        if (user == null) {
            throw new ServiceException("用户不存在");
        }
        String ut = user.getUserType();
        boolean own;
        if ("1".equals(ut) || "3".equals(ut)) {
            // 普通/夜市商家：订单 shId 即商家 userId
            own = merchantUserId.equals(order.getShId());
        } else {
            // 摊位商家：订单门店 mdId 即商家 storeId
            own = user.getStoreId() != null && user.getStoreId().equals(order.getMdId());
        }
        if (!own) {
            throw new ServiceException("无权操作该订单发票");
        }
        return order;
    }

    // ==================== US4/US5：管理端 ====================

    /** 管理端：订单发票列表（配合 PageHelper 分页）。 */
    public List<PosOrderInvoiceVo> list(PosOrderInvoiceVo query) {
        if (query != null && query.getDateRange() != null && query.getDateRange().length == 2) {
            query.setCretimStart(query.getDateRange()[0]);
            query.setCretimEnd(query.getDateRange()[1]);
        }
        return posOrderInvoiceMapper.selectInvoiceList(query);
    }

    /** 管理端：订单发票详情。 */
    public PosOrderInvoiceVo detail(Long orderId) {
        return posOrderInvoiceMapper.selectInvoiceDetail(orderId);
    }

    /** 管理端：重新开票（仅 失败/作废 单；运营身份不校验客户归属）。 */
    public int retry(Long orderId) {
        PosOrderInvoice row = posOrderInvoiceMapper.selectOne(
                new LambdaQueryWrapper<PosOrderInvoice>().eq(PosOrderInvoice::getOrderId, orderId));
        if (row == null) {
            throw new ServiceException("发票记录不存在");
        }
        int st = row.getInvoiceStatus() == null ? STATUS_NOT_ISSUED : row.getInvoiceStatus();
        if (st != STATUS_FAILED && st != STATUS_INVALID) {
            throw new ServiceException("仅失败或作废的发票可重新开票");
        }
        // 重置为未开，复用客户开票参数重开（运营身份 currentUserId 传 null 跳过归属校验）
        PosOrder order = posOrderMapper.selectOne(new LambdaQueryWrapper<PosOrder>().eq(PosOrder::getDdId,orderId.toString()));
        if (order == null) {
            throw new ServiceException("订单不存在");
        }
        PosStoreEzpay ez = assertInvoiceable(order.getMdId());
        ApplyInvoiceDto dto = new ApplyInvoiceDto();
        dto.setOrderId(orderId);
        dto.setCategory(row.getInvoiceCategory());
        dto.setBuyerName(row.getBuyerName());
        dto.setBuyerUbn(row.getBuyerUbn());
        dto.setBuyerEmail(row.getBuyerEmail());
        dto.setCarrierType(row.getCarrierType());
        dto.setCarrierNum(row.getCarrierNum());
        // 复用核心开票（不含归属校验）：直接走 issue + 落库
        return reIssueAndSave(order, row, dto, ez);
    }

    /** 管理端：作废发票（仅 已开 单，调 ezPay invoice_invalid）。 */
    public int invalid(Long orderId, String reason) {
        PosOrderInvoice row = posOrderInvoiceMapper.selectOne(
                new LambdaQueryWrapper<PosOrderInvoice>().eq(PosOrderInvoice::getOrderId, orderId));
        if (row == null || !Integer.valueOf(STATUS_ISSUED).equals(row.getInvoiceStatus())) {
            throw new ServiceException("仅已开发票可作废");
        }
        PosOrder order = posOrderMapper.selectPosOrderById(orderId);
        PosStoreEzpay ez = posStoreEzpayMapper.selectOne(
                new LambdaQueryWrapper<PosStoreEzpay>().eq(PosStoreEzpay::getStoreId, order.getMdId()));
        if (ez == null) {
            throw new ServiceException("门店 ezPay 凭证缺失，无法作废");
        }

        Map<String, Object> postData = new LinkedHashMap<>();
        postData.put("RespondType", "JSON");
        postData.put("Version", "1.0");
        postData.put("InvoiceNumber", row.getInvoiceNumber());
        postData.put("InvalidReason", StrUtil.isBlank(reason) ? "商家作废" : reason);

        try {
            EzPayConfig cfg = new EzPayConfig(ez.getMerchantId(), ez.getHashKey(), ez.getHashIv());
            JSONObject resp = ezPay.doPost(ezpayBaseUrl + EzPay.URL_INVALID, cfg, postData);            String status = resp == null ? "" : resp.getString("Status");
            if ("SUCCESS".equals(status)) {
                row.setInvoiceStatus(STATUS_INVALID);
                row.setInvalidTime(new Date());
                saveOrUpdate(row);
                return 1;
            }
            throw new ServiceException("作废失败：" + (resp == null ? "ezPay 无回应" : resp.getString("Message")));
        } catch (ServiceException se) {
            throw se;
        } catch (Exception e) {
            throw new ServiceException("ezPay 服务暂不可用：" + (e.getMessage() == null ? e.getClass().getSimpleName() : e.getMessage()));
        }
    }

    // ==================== 内部辅助 ====================

    /** 复用开票核心（运营重开，无归属校验）。 */
    private int reIssueAndSave(PosOrder order, PosOrderInvoice row, ApplyInvoiceDto dto, PosStoreEzpay ez) {
        int amount = order.getAmount() == null ? 0 : order.getAmount();
        int freight = (int) Math.round(order.getFreight() == null ? 0d : order.getFreight());
        int invoiceTotal = amount - freight;
        int sales = (int) Math.round(invoiceTotal / 1.05);
        int tax = invoiceTotal - sales;

        Map<String, Object> inv = buildIssueData(dto, order, invoiceTotal, sales, tax);
        EzPayConfig cfg = new EzPayConfig(ez.getMerchantId(), ez.getHashKey(), ez.getHashIv());

        int newStatus;
        String invoiceNumber = null, randomNum = null, invoiceTransNo = null,
                invoiceBarCode = null, invoiceQrcodeL = null, invoiceQrcodeR = null, failReason = null;
        try {
            JSONObject resp = ezPay.issueInvoice(ezpayBaseUrl, cfg, inv);
            String status = resp == null ? "" : resp.getString("Status");
            JSONObject result = resp == null ? null : resp.getJSONObject("Result");
            if ("SUCCESS".equals(status) && result != null && StrUtil.isNotBlank(result.getString("InvoiceNumber"))) {
                invoiceNumber = result.getString("InvoiceNumber");
                randomNum = result.getString("RandomNum");
                invoiceTransNo = result.getString("InvoiceTransNo");
                invoiceBarCode = result.getString("BarCode");
                invoiceQrcodeL = result.getString("QRcodeL");
                invoiceQrcodeR = result.getString("QRcodeR");
                newStatus = STATUS_ISSUED;
            } else {
                failReason = resp == null ? "ezPay 无回应" : (status + ":" + resp.getString("Message"));
                newStatus = STATUS_FAILED;
            }
        } catch (Exception e) {
            failReason = "ezPay 服务暂不可用：" + (e.getMessage() == null ? e.getClass().getSimpleName() : e.getMessage());
            newStatus = STATUS_FAILED;
        }

        Date now = new Date();
        if (newStatus == STATUS_ISSUED) {
            row.setInvoiceNumber(invoiceNumber);
            row.setRandomNum(randomNum);
            row.setInvoiceTransNo(invoiceTransNo);
            row.setInvoiceBarCode(invoiceBarCode);
            row.setInvoiceQrcodeL(invoiceQrcodeL);
            row.setInvoiceQrcodeR(invoiceQrcodeR);
            row.setIssueTime(now);
            row.setFailReason(null);
        } else {
            row.setFailReason(StrUtil.sub(failReason, 0, 480));
        }
        row.setInvoiceStatus(newStatus);
        saveOrUpdate(row);
        return newStatus == STATUS_ISSUED ? 1 : 0;
    }

    /** 校验门店可开票并返回凭证；不可开票抛异常。 */
    private PosStoreEzpay assertInvoiceable(Long storeId) {
        if (storeId == null) {
            throw new ServiceException("订单未关联门店，暂不可开票");
        }
        PosStore store = posStoreMapper.selectPosStoreById(storeId);
        if (store != null && Integer.valueOf(1).equals(store.getInvoiceExempt())) {
            throw new ServiceException("该门店免用发票，无需开票");
        }
        PosStoreEzpay ez = posStoreEzpayMapper.selectOne(
                new LambdaQueryWrapper<PosStoreEzpay>().eq(PosStoreEzpay::getStoreId, storeId));
        if (ez == null || !Integer.valueOf(2).equals(ez.getEzpayStatus())
                || !Integer.valueOf(1).equals(ez.getIsEnabled())) {
            throw new ServiceException("该门店暂不支持电子发票");
        }
        return ez;
    }

    /** 门店是否可开票（不抛异常）。 */
    private boolean canInvoice(Long storeId) {
        if (storeId == null) {
            return false;
        }
        PosStore store = posStoreMapper.selectPosStoreById(storeId);
        if (store != null && Integer.valueOf(1).equals(store.getInvoiceExempt())) {
            return false;
        }
        PosStoreEzpay ez = posStoreEzpayMapper.selectOne(
                new LambdaQueryWrapper<PosStoreEzpay>().eq(PosStoreEzpay::getStoreId, storeId));
        return ez != null && Integer.valueOf(2).equals(ez.getEzpayStatus())
                && Integer.valueOf(1).equals(ez.getIsEnabled());
    }

    /**
     * 场景入参校验（service 内强校验，拦截非法请求不调 ezPay）。对齐 ezPay 开票模型：
     * B2B：统编(8位)+邮箱必填、无载具；B2C：载具(0/1/2)+号码必填，ezPay会员载具(2)时邮箱必填。
     */
    private void validateInvoiceInput(ApplyInvoiceDto dto) {
        if ("B2B".equals(dto.getCategory())) {
            if (StrUtil.isBlank(dto.getBuyerUbn()) || !dto.getBuyerUbn().matches("\\d{8}")) {
                throw new ServiceException("统编格式不正确，须为 8 位数字");
            }
            if (StrUtil.isBlank(dto.getBuyerEmail())) {
                throw new ServiceException("B2B 发票须填写买方邮箱");
            }
            if (StrUtil.isNotBlank(dto.getCarrierType()) || StrUtil.isNotBlank(dto.getCarrierNum())) {
                throw new ServiceException("B2B 发票不支持载具");
            }
        } else if ("B2C".equals(dto.getCategory())) {
            String ct = dto.getCarrierType();
            if (!"0".equals(ct) && !"1".equals(ct) && !"2".equals(ct)) {
                throw new ServiceException("B2C 发票须选择载具类型(0手机条码/1自然人凭证/2ezPay会员)");
            }
            if (StrUtil.isBlank(dto.getCarrierNum())) {
                throw new ServiceException("载具号码不能为空");
            }
            if ("2".equals(ct) && StrUtil.isBlank(dto.getBuyerEmail())) {
                throw new ServiceException("ezPay 会员载具须填写买方邮箱");
            }
        }
    }

    /** 组装 ezPay invoice_issue 业务参数（Category/PrintFlag/Buyer/Amt/明细）。 */
    private Map<String, Object> buildIssueData(ApplyInvoiceDto dto, PosOrder order,
                                               int invoiceTotal, int sales, int tax) {
        Map<String, Object> inv = new LinkedHashMap<>();
        inv.put("MerchantOrderNo", order.getDdId());
        inv.put("Category", dto.getCategory());
        inv.put("BuyerName", dto.getBuyerName());
        if ("B2B".equals(dto.getCategory())) {
            inv.put("BuyerUBN", dto.getBuyerUbn());
            inv.put("BuyerEmail", dto.getBuyerEmail());   // B2B 邮箱必填：ezPay 发开立通知给买方，凭此查看
            inv.put("PrintFlag", "Y");
        } else {
            // B2C 载具必填（validateInvoiceInput 已校验 carrierType∈0/1/2、号码非空），PrintFlag=N
            inv.put("CarrierType", dto.getCarrierType());
            inv.put("CarrierNum", dto.getCarrierNum());
            inv.put("PrintFlag", "N");
            // ezPay 会员载具(2)需邮箱；手机条码(0)/自然人凭证(1)票进载具，邮箱留空
            if ("2".equals(dto.getCarrierType()) && StrUtil.isNotBlank(dto.getBuyerEmail())) {
                inv.put("BuyerEmail", dto.getBuyerEmail());
            }
        }
        inv.put("TaxType", "1");
        inv.put("TaxRate", "5");
        inv.put("Amt", String.valueOf(sales));
        inv.put("TaxAmt", String.valueOf(tax));
        inv.put("TotalAmt", String.valueOf(invoiceTotal));
        appendItems(inv, order.getFood(), invoiceTotal);
        return inv;
    }

    /**
     * 逐商品明细（research D2/D3）：从 food JSON 解析，优惠按比例分摊到单价（方案 B）。
     * 每行满足 ItemCount × ItemPrice = ItemAmt（单价决定金额，ezPay 逐商品校验通过）。
     */
    private void appendItems(Map<String, Object> inv, String foodJson, int invoiceTotal) {
        JSONArray arr = StrUtil.isBlank(foodJson) ? null : com.alibaba.fastjson.JSON.parseArray(foodJson);
        if (arr == null || arr.isEmpty()) {
            inv.put("ItemName", "餐点");
            inv.put("ItemCount", "1");
            inv.put("ItemUnit", "份");
            inv.put("ItemPrice", String.valueOf(invoiceTotal));
            inv.put("ItemAmt", String.valueOf(invoiceTotal));
            return;
        }
        int foodTotal = foodOriginalTotal(arr);
        double ratio = foodTotal > 0 ? (double) invoiceTotal / foodTotal : 1.0;
        StringBuilder name = new StringBuilder(), count = new StringBuilder(),
                unit = new StringBuilder(), price = new StringBuilder(), amt = new StringBuilder();
        for (int i = 0; i < arr.size(); i++) {
            com.alibaba.fastjson.JSONObject it = arr.getJSONObject(i);
            int p = it.getIntValue("price") + it.getIntValue("otherPrice");
            int c = it.getIntValue("number");
            if (c <= 0) {
                c = 1;
            }
            int itemPrice = (int) Math.round(p * ratio);
            int itemAmt = itemPrice * c;
            if (i > 0) {
                name.append("|"); count.append("|"); unit.append("|"); price.append("|"); amt.append("|");
            }
            String nm = it.getString("name");
            name.append(StrUtil.isBlank(nm) ? "餐点" : nm);
            count.append(c);
            unit.append("個");
            price.append(itemPrice);
            amt.append(itemAmt);
        }
        inv.put("ItemName", name.toString());
        inv.put("ItemCount", count.toString());
        inv.put("ItemUnit", unit.toString());
        inv.put("ItemPrice", price.toString());
        inv.put("ItemAmt", amt.toString());
    }

    /** food 商品原价总额（含税）= Σ(price + otherPrice) × number。 */
    private int foodOriginalTotal(JSONArray arr) {
        int sum = 0;
        for (int i = 0; i < arr.size(); i++) {
            com.alibaba.fastjson.JSONObject it = arr.getJSONObject(i);
            int p = it.getIntValue("price") + it.getIntValue("otherPrice");
            int c = it.getIntValue("number");
            sum += p * (c <= 0 ? 1 : c);
        }
        return sum;
    }

    /** 新增或更新（显式设置时间与人）。 */
    private void saveOrUpdate(PosOrderInvoice row) {
        Date now = new Date();
        String user = currentUser();
        if (row.getId() == null) {
            row.setCreateTime(now);
            row.setUpdateTime(now);
            row.setCreateBy(user);
            row.setUpdateBy(user);
            posOrderInvoiceMapper.insert(row);
        } else {
            row.setUpdateTime(now);
            row.setUpdateBy(user);
            posOrderInvoiceMapper.updateById(row);
        }
    }

    private String currentUser() {
        try {
            return SecurityUtils.getUsername();
        } catch (Exception e) {
            return "system";
        }
    }
}