foodie-server/ruoyi-admin/src/main/java/com/ruoyi/app/flashdelivery/service/FlashDeliveryApplicationService.java

package com.ruoyi.app.flashdelivery.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.ruoyi.app.flashdelivery.dto.*;
import com.ruoyi.app.flashdelivery.exception.FlashDeliveryQuoteChangedException;
import com.ruoyi.app.flashdelivery.route.FlashDeliveryRouteService;
import com.ruoyi.app.flashdelivery.route.GeoPoint;
import com.ruoyi.app.flashdelivery.route.RouteDistance;
import com.ruoyi.app.order.RiderDeliveryAcceptanceService;
import com.ruoyi.app.order.RiderDeliveryLockService;
import com.ruoyi.common.core.domain.entity.SysDictData;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.DictUtils;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.InfoUser;
import com.ruoyi.system.domain.flash.*;
import com.ruoyi.system.mapper.InfoUserMapper;
import com.ruoyi.system.mapper.flash.*;
import com.ruoyi.system.service.PaymentMethodGateService;
import org.springframework.beans.BeanUtils;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.net.URI;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.security.SecureRandom;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.function.Function;

import static com.ruoyi.system.domain.flash.FlashDeliveryStatus.*;

/**
 * 闪送业务编排服务。
 *
 * <p>负责报价、订单创建、抢单、履约状态流转、平台介入和审计日志。
 * 订单身份只接受 Controller 从 token 解析后的用户 ID，客户端传入的金额、距离或操作人均不可信。</p>
 */
@Service
public class FlashDeliveryApplicationService {
    private static final List<String> SERVICE_TYPES = List.of("HELP_SEND", "HELP_PICKUP");
    private static final Set<String> DELIVERY_TYPES = Set.of("NORMAL", "URGENT");
    private static final Set<String> PACKAGE_TYPES = Set.of("DOCUMENT", "GIFT", "CLOTHING", "BEAUTY",
            "DAILY_NECESSITIES", "FOOD_INGREDIENTS", "ELECTRONICS", "SMALL_APPLIANCE", "OTHER");
    private static final Set<String> WEIGHT_RANGES = Set.of("UP_TO_5_KG", "OVER_5_TO_10_KG",
            "OVER_10_TO_15_KG", "OVER_15_TO_20_KG");
    private static final Set<String> DELIVERY_MODES = Set.of("NOW", "SCHEDULED");
    /** 支付方式取值与主订单系统同域：4=现金、6=线下转账（027 线下转账支付）。 */
    private static final String PAY_TYPE_CASH = "4";
    private static final DateTimeFormatter PRICING_TIME_FORMAT = DateTimeFormatter.ofPattern("HH:mm");
    private static final ZoneId TAIPEI = ZoneId.of("Asia/Taipei");
    private static final int MAX_DISTANCE_METERS = 40_000;
    private static final BigDecimal MAX_PRICING_DISTANCE = new BigDecimal("999999.99");
    private static final long SCHEDULE_SLOT_MILLIS = 30L * 60L * 1000L;
    private static final long MAX_SCHEDULE_DELAY_MILLIS = 3L * 24L * 60L * 60L * 1000L;
    private static final SecureRandom PIN_RANDOM = new SecureRandom();
    private final FlashDeliveryOrderMapper orderMapper;
    private final FlashDeliveryOrderStopMapper stopMapper;
    private final FlashDeliveryTargetAdjustmentMapper adjustmentMapper;
    private final FlashDeliveryPricingMapper pricingMapper;
    private final FlashDeliveryOrderImageMapper imageMapper;
    private final FlashDeliveryOrderLogMapper logMapper;
    private final InfoUserMapper userMapper;
    private final FlashDeliveryRouteService routeService;
    private final FlashDeliveryPricingCalculator pricingCalculator;
    private final RiderDeliveryLockService riderDeliveryLockService;
    private final RiderDeliveryAcceptanceService riderDeliveryAcceptanceService;
    /** 031 支付闸门：闪送下单、报价展示和骑手待抢列表使用同一可用性规则。 */
    private final PaymentMethodGateService paymentMethodGateService;

    public FlashDeliveryApplicationService(FlashDeliveryOrderMapper orderMapper,
                                           FlashDeliveryPricingMapper pricingMapper,
                                           FlashDeliveryOrderImageMapper imageMapper,
                                           FlashDeliveryOrderLogMapper logMapper,
                                           InfoUserMapper userMapper,
                                           FlashDeliveryRouteService routeService,
                                           FlashDeliveryPricingCalculator pricingCalculator,
                                           RiderDeliveryLockService riderDeliveryLockService,
                                           RiderDeliveryAcceptanceService riderDeliveryAcceptanceService,
                                           FlashDeliveryOrderStopMapper stopMapper,
                                           FlashDeliveryTargetAdjustmentMapper adjustmentMapper,
                                           PaymentMethodGateService paymentMethodGateService) {
        this.orderMapper = orderMapper;
        this.stopMapper = stopMapper;
        this.adjustmentMapper = adjustmentMapper;
        this.pricingMapper = pricingMapper;
        this.imageMapper = imageMapper;
        this.logMapper = logMapper;
        this.userMapper = userMapper;
        this.routeService = routeService;
        this.pricingCalculator = pricingCalculator;
        this.riderDeliveryLockService = riderDeliveryLockService;
        this.riderDeliveryAcceptanceService = riderDeliveryAcceptanceService;
        this.paymentMethodGateService = paymentMethodGateService;
    }

    /** 闪送首页：返回开放的业务场景、配送等级，以及当前时段各服务的公开运价摘要。 */
    public FlashDeliveryHomeView home() {
        FlashDeliveryHomeView view = new FlashDeliveryHomeView();
        view.setPickupStopLimit(pickupStopLimit());
        view.setShowMultiPickup(dictionaryEnabled("flash_show_multi_pickup"));
        view.setShowUrgentOption(dictionaryEnabled("flash_show_urgent_option"));
        view.setServiceTypes(SERVICE_TYPES);
        view.setDeliveryTypes(List.of("NORMAL", "URGENT"));
        FlashDeliveryPricing pricing = findPricingAtOrNull(pricingTargetTime(new Date()), FlashDeliveryVehicleType.MOTORCYCLE);
        view.setServices(pricing == null ? List.of() : SERVICE_TYPES.stream()
                .map(serviceType -> serviceView(pricing, serviceType)).toList());
        view.setPayMethods(paymentMethodGateService.listAvailable(
                PaymentMethodGateService.GateScope.RIDER_FLASH, null, null));
        return view;
    }

    /** 实时报价：校验请求后按服务端路线距离和命中时段的运价计算费用（立即单取当前时段、预约单取预约开始时刻），不写库。 */
    public FlashDeliveryQuoteView quote(FlashDeliveryQuoteRequest request) {
        // 报价只使用服务端路线距离和当前启用的计价配置，避免客户端篡改金额。
        QuoteContext context = calculateQuote(request);
        return quoteView(request, context);
    }

    /** 将报价上下文组装为对外报价视图，含运价快照字段与费用明细。 */
    private FlashDeliveryQuoteView quoteView(FlashDeliveryQuoteRequest request, QuoteContext context) {
        FlashDeliveryQuoteView view = new FlashDeliveryQuoteView();
        view.setServiceType(request.getServiceType());
        view.setDeliveryType(request.getDeliveryType());
        view.setVehicleType(request.getVehicleType());
        view.setDeliveryMode(normalizeDeliveryMode(request.getDeliveryMode()));
        view.setScheduledPickupStartAt(request.getScheduledPickupStartAt());
        view.setScheduledPickupEndAt(request.getScheduledPickupEndAt());
        view.setPricingId(context.pricing().getId());
        view.setStartTime(context.pricing().getStartTime());
        view.setEndTime(context.pricing().getEndTime());
        view.setDistanceMeters(context.route().distanceMeters());
        view.setDistanceSource(context.route().source());
        view.setEstimatedDurationSeconds(context.route().durationSeconds());
        view.setStartingDistance(context.pricing().getStartingDistance());
        view.setStartingFare(context.pricing().getStartingFare());
        view.setDistance(context.pricing().getDistance());
        view.setFreight(context.pricing().getFreight());
        view.setUrgentRate(context.pricing().getUrgentRate());
        view.setMinimumUrgentFee(context.pricing().getMinimumUrgentFee());
        applyBreakdown(view, context.breakdown());
        view.setCurrency("TWD");
        view.setPricingVersion(context.pricing().getConfigVersion());
        view.setPayMethods(paymentMethodGateService.listAvailable(
                PaymentMethodGateService.GateScope.RIDER_FLASH, null, null));
        return view;
    }

    /**
     * 幂等创建订单：clientRequestId 与 userId 构成唯一键，重复提交直接返回已有订单。
     * 创建前按最新条件重新报价，客户端回传报价不一致时抛出 FlashDeliveryQuoteChangedException；
     * 成功后保存计价快照、寄件图片和初始状态日志。
     */
    @Transactional
    public FlashDeliveryOrderDetailView create(Long userId, FlashDeliveryCreateRequest request) {
        requireUserId(userId);
        if (request == null || !hasText(request.getClientRequestId())
                || request.getClientRequestId().trim().length() > 64) {
            throw fail("flash.delivery.client.request.id.invalid");
        }
        String requestId = request.getClientRequestId().trim();
        // 用户 ID + clientRequestId 构成幂等键；重复请求直接返回第一次创建的订单。
        FlashDeliveryOrder existing = orderMapper.selectByUserRequestId(userId, requestId);
        if (existing != null) return participantDetail(lockOrder(existing.getId()), true, false);
        if (request.getUserNote() != null && request.getUserNote().length() > 500) {
            throw fail("flash.delivery.note.too.long");
        }
        QuoteContext quote = calculateQuote(request);
        FlashDeliveryQuoteView latestQuote = quoteView(request, quote);
        if (!matchesQuotedPrice(request, latestQuote)) {
            throw new FlashDeliveryQuoteChangedException(latestQuote);
        }
        Date now = new Date();
        String deliveryMode = normalizeDeliveryMode(request.getDeliveryMode());
        validateSchedule(deliveryMode, request.getScheduledPickupStartAt(), request.getScheduledPickupEndAt(), now);
        boolean pinRequired = request.getPinRequired() == null || request.getPinRequired();
        String payType = normalizePayType(request.getPayType());
        List<String> senderImages = validateProofUrls(request.getSenderImageUrls(), false);
        FlashDeliveryOrder order = new FlashDeliveryOrder();
        order.setOrderNo("FD" + UUID.randomUUID().toString().replace("-", "").substring(0, 24).toUpperCase(Locale.ROOT));
        order.setClientRequestId(requestId);
        order.setUserId(userId);
        order.setServiceType(request.getServiceType());
        order.setDeliveryType(request.getDeliveryType());
        order.setVehicleType(request.getVehicleType());
        order.setStatus(WAITING_ACCEPTANCE);
        copyPickupSummary(order, quote.pickups());
        order.setPickedUpStopCount(0);
        order.setDeliveryMode(deliveryMode);
        order.setScheduledPickupStartAt("SCHEDULED".equals(deliveryMode) ? request.getScheduledPickupStartAt() : null);
        order.setScheduledPickupEndAt("SCHEDULED".equals(deliveryMode) ? request.getScheduledPickupEndAt() : null);
        order.setPinRequired(pinRequired);
        order.setDeliveryPinCode(pinRequired ? String.format(Locale.ROOT, "%04d", PIN_RANDOM.nextInt(10_000)) : null);

        copyAddress(request.getDelivery(), order, false);
        order.setReceiverUserId(resolveReceiverUserId(order.getDeliveryPhone()));
        order.setDistanceMeters(quote.route().distanceMeters());
        order.setDistanceSource(quote.route().source());
        order.setEstimatedDurationSeconds(quote.route().durationSeconds());
        order.setAmount(quote.breakdown().getAmount());
        order.setCurrency("TWD");
        order.setPayType(payType);
        order.setPricingId(quote.pricing().getId());
        order.setPricingVersion(quote.pricing().getConfigVersion());
        order.setPricingStartTime(quote.pricing().getStartTime());
        order.setPricingEndTime(quote.pricing().getEndTime());
        order.setStartingDistance(quote.pricing().getStartingDistance());
        order.setStartingFare(quote.pricing().getStartingFare());
        order.setDistance(quote.pricing().getDistance());
        order.setFreight(quote.pricing().getFreight());
        // 保存计价快照，后台调价只影响新订单，不追溯修改历史订单金额。
        order.setDistanceFee(quote.breakdown().getDistanceFee());
        order.setBaseDeliveryFee(quote.breakdown().getBaseDeliveryFee());
        order.setUrgentRate(quote.pricing().getUrgentRate());
        order.setMinimumUrgentFee(quote.pricing().getMinimumUrgentFee());
        order.setUrgentFee(quote.breakdown().getUrgentFee());
        order.setTipAmount(quote.breakdown().getTipAmount());
        order.setUserNote(trimToNull(request.getUserNote()));
        order.setVersion(0);
        order.setCreateTime(now);
        order.setUpdateTime(now);
        try {
            orderMapper.insert(order);
        } catch (DataIntegrityViolationException duplicate) {
            // 并发重复请求可能同时通过前置查询，最终由数据库唯一键完成幂等收口。
            FlashDeliveryOrder concurrent = orderMapper.selectOne(new QueryWrapper<FlashDeliveryOrder>()
                    .eq("user_id", userId).eq("client_request_id", requestId).last("FOR UPDATE"));
            if (concurrent != null) return participantDetail(lockOrder(concurrent.getId()), true, false);
            throw duplicate;
        }
        saveStops(order, quote.pickups(), request.getDelivery(), now);
        saveImages(order.getId(), "SENDER", "USER", userId, senderImages, now);
        writeLog(order.getId(), null, WAITING_ACCEPTANCE, "USER", userId, null, now);
        return participantDetail(order, true, false);
    }

    /** 分页查询当前用户参与的订单卡片；role=sender 按寄件人、receiver 按收件人过滤。 */
    public IPage<FlashDeliveryUserOrderListView> userOrders(Long userId, int pageNum, int pageSize, String role) {
        String selectedRole = hasText(role) ? role.trim().toLowerCase(Locale.ROOT) : "sender";
        if (!"sender".equals(selectedRole) && !"receiver".equals(selectedRole)) {
            throw fail("flash.delivery.tab.invalid");
        }
        String participantColumn = "receiver".equals(selectedRole) ? "receiver_user_id" : "user_id";
        QueryWrapper<FlashDeliveryOrder> query = new QueryWrapper<FlashDeliveryOrder>()
                .eq(participantColumn, userId).orderByDesc("create_time");
        return mapPage(orderMapper.selectPage(page(pageNum, pageSize), query), order -> {
            FlashDeliveryUserOrderListView view = userOrderListView(order);
            view.setCanUserCancel(Objects.equals(userId, order.getUserId()) && canUserCancel(order));
            return view;
        });
    }

    /** 查询本人订单详情，仅寄件人和匹配到的收件人可见。 */
    public FlashDeliveryOrderDetailView userDetail(Long userId, Long orderId) {
        FlashDeliveryOrder order = requireOrder(orderId);
        if (!isParticipant(userId, order)) throw fail("flash.delivery.order.not.found");
        FlashDeliveryOrderDetailView view = participantDetail(order, true, false);
        view.setCanUserCancel(Objects.equals(userId, order.getUserId()) && canUserCancel(order));
        return view;
    }

    /** 地址修改先报价，用户确认前不改动订单。 */
    public FlashDeliveryQuoteView quoteAddress(Long userId, Long orderId,
                                               FlashDeliveryAddressChangeRequest request) {
        if (request == null) throw fail("flash.delivery.request.required");
        FlashDeliveryOrder order = requireEditableOrder(userId, orderId, request.getOrderVersion());
        return calculateAddressQuote(order, request);
    }

    /** 确认修改待接单订单地址：重算报价并与回传值比对，按版本条件更新。 */
    @Transactional
    public FlashDeliveryOrderDetailView updateAddress(Long userId, Long orderId,
                                                       FlashDeliveryAddressConfirmRequest request) {
        if (request == null) throw fail("flash.delivery.request.required");
        FlashDeliveryOrder order = requireEditableOrder(userId, orderId, request.getOrderVersion());
        FlashDeliveryQuoteView quote = calculateAddressQuote(order, request);
        if (!Objects.equals(request.getQuotedDistanceMeters(), quote.getDistanceMeters())
                || !Objects.equals(request.getQuotedBaseDeliveryFee(), quote.getBaseDeliveryFee())
                || !Objects.equals(request.getQuotedDistanceFee(), quote.getDistanceFee())
                || !Objects.equals(request.getQuotedUrgentFee(), quote.getUrgentFee())
                || !Objects.equals(request.getQuotedAmount(), quote.getAmount())) {
            throw new FlashDeliveryQuoteChangedException(quote);
        }
        List<FlashDeliveryPickupRequest> pickups = editablePickups(order, request);
        copyPickupSummary(order, pickups);
        copyAddress(request.getDelivery(), order, false);
        order.setReceiverUserId(resolveReceiverUserId(order.getDeliveryPhone()));
        order.setDistanceMeters(quote.getDistanceMeters());
        order.setDistanceSource(quote.getDistanceSource());
        order.setEstimatedDurationSeconds(quote.getEstimatedDurationSeconds());
        // 改址报价携带原运价快照，金额与完整站点同事务保存，不引入最新运价。
        order.setPricingId(quote.getPricingId());
        order.setPricingVersion(quote.getPricingVersion());
        order.setPricingStartTime(quote.getStartTime());
        order.setPricingEndTime(quote.getEndTime());
        order.setStartingDistance(quote.getStartingDistance());
        order.setStartingFare(quote.getStartingFare());
        order.setDistance(quote.getDistance());
        order.setFreight(quote.getFreight());
        order.setUrgentRate(quote.getUrgentRate());
        order.setMinimumUrgentFee(quote.getMinimumUrgentFee());
        order.setDistanceFee(quote.getDistanceFee());
        order.setBaseDeliveryFee(quote.getBaseDeliveryFee());
        order.setUrgentFee(quote.getUrgentFee());
        order.setAmount(quote.getAmount());
        Date now = new Date();
        order.setUpdateTime(now);
        // 即使上面的查询仍显示待接单，骑手也可能已接走，最终以条件 UPDATE 为准。
        if (orderMapper.updateWaitingAddress(order, request.getOrderVersion()) != 1) {
            throw fail("flash.delivery.state.changed");
        }
        // 条件更新成功后持有订单行锁至提交，抢单不会读到仅修改一半的地址。
        stopMapper.delete(new QueryWrapper<FlashDeliveryOrderStop>().eq("order_id", orderId));
        saveStops(order, pickups, request.getDelivery(), now);
        order.setVersion(order.getVersion() + 1);
        writeLog(orderId, WAITING_ACCEPTANCE, WAITING_ACCEPTANCE, "USER", userId, "ADDRESS_UPDATED", now);
        return participantDetail(order, true, false);
    }

    /** 待接单订单追加小费：订单总额与小费同步增加，版本条件防止并发重复加款。 */
    @Transactional
    public FlashDeliveryOrderDetailView addTip(Long userId, Long orderId, FlashDeliveryTipAddRequest request) {
        if (request == null) throw fail("flash.delivery.request.required");
        FlashDeliveryOrder order = requireEditableOrder(userId, orderId, request.getOrderVersion());
        if (request.getAdditionalTipAmount() == null || request.getAdditionalTipAmount().signum() <= 0) {
            throw fail("flash.delivery.tip.additional.invalid");
        }
        long tip;
        long amount;
        try {
            // 保留 JSON 原始数值，禁止 1.9 等小数在绑定时被截断为整数小费。
            long additionalTip = request.getAdditionalTipAmount().longValueExact();
            tip = Math.addExact(order.getTipAmount(), additionalTip);
            amount = Math.addExact(order.getAmount(), additionalTip);
        } catch (ArithmeticException exception) {
            throw fail("flash.delivery.tip.additional.invalid");
        }
        order.setTipAmount(tip);
        order.setAmount(amount);
        Date now = new Date();
        order.setUpdateTime(now);
        if (orderMapper.updateWaitingTip(order, request.getOrderVersion()) != 1) {
            throw fail("flash.delivery.state.changed");
        }
        order.setVersion(order.getVersion() + 1);
        writeLog(orderId, WAITING_ACCEPTANCE, WAITING_ACCEPTANCE, "USER", userId, "TIP_ADDED", now);
        return participantDetail(order, true, false);
    }

    /** 校验并加载可编辑订单：本人、待接单、未绑定骑手且版本一致。 */
    private FlashDeliveryOrder requireEditableOrder(Long userId, Long orderId, Integer version) {
        requireUserId(userId);
        if (orderId == null || orderId <= 0) throw fail("flash.delivery.order.not.found");
        // 写入路径先锁订单再读取站点，保持与抢单、取货和取消一致的锁顺序。
        FlashDeliveryOrder order = TransactionSynchronizationManager.isActualTransactionActive()
                ? lockOrder(orderId) : requireOrder(orderId);
        if (!Objects.equals(userId, order.getUserId())) throw fail("flash.delivery.order.not.found");
        if (!WAITING_ACCEPTANCE.equals(order.getStatus()) || order.getRiderId() != null) {
            throw fail("flash.delivery.edit.not.allowed");
        }
        if (version == null || version < 0) throw fail("flash.delivery.order.version.invalid");
        if (!Objects.equals(version, order.getVersion())) throw fail("flash.delivery.state.changed");
        return order;
    }

    /** 地址修改报价：使用订单保存的运价快照重算，不采用当前运价，避免改地址顺带变价。 */
    private FlashDeliveryQuoteView calculateAddressQuote(FlashDeliveryOrder order,
                                                         FlashDeliveryAddressChangeRequest request) {
        List<FlashDeliveryPickupRequest> pickups = editablePickups(order, request);
        validatePickups(pickups, request.getDelivery());
        RouteDistance route = pickupRoute(pickups, request.getDelivery(), vehicleTypeOf(order));
        // FR-074/093：改址沿用下单快照，只重算整条路线，平台后续调价不影响此单。
        FlashDeliveryPricing pricing = new FlashDeliveryPricing();
        pricing.setId(order.getPricingId()); pricing.setConfigVersion(order.getPricingVersion());
        pricing.setStartTime(order.getPricingStartTime()); pricing.setEndTime(order.getPricingEndTime());
        pricing.setStartingDistance(order.getStartingDistance()); pricing.setStartingFare(order.getStartingFare());
        pricing.setDistance(order.getDistance()); pricing.setFreight(order.getFreight());
        pricing.setUrgentRate(order.getUrgentRate()); pricing.setMinimumUrgentFee(order.getMinimumUrgentFee());
        FlashDeliveryPriceBreakdown breakdown;
        try {
            breakdown = pricingCalculator.calculateBreakdown(pricing, route.distanceMeters(),
                    order.getDeliveryType(), order.getTipAmount());
        } catch (ArithmeticException exception) {
            throw fail("flash.delivery.tip.invalid");
        }
        FlashDeliveryQuoteRequest quoteRequest = new FlashDeliveryQuoteRequest();
        quoteRequest.setServiceType(order.getServiceType());
        quoteRequest.setDeliveryType(order.getDeliveryType());
        quoteRequest.setVehicleType(vehicleTypeOf(order));
        quoteRequest.setDeliveryMode(order.getDeliveryMode());
        quoteRequest.setScheduledPickupStartAt(order.getScheduledPickupStartAt());
        quoteRequest.setScheduledPickupEndAt(order.getScheduledPickupEndAt());
        FlashDeliveryQuoteView view = quoteView(quoteRequest, new QuoteContext(pricing, route, breakdown, pickups));
        view.setOrderVersion(order.getVersion());
        return view;
    }

    /** 用户取消：仅待接单或已接单（实际取件前）允许。 */
    @Transactional
    public void userCancel(Long userId, Long orderId, FlashDeliveryReasonRequest request) {
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!Objects.equals(userId, order.getUserId())) throw fail("flash.delivery.order.not.found");
        if (anyPicked(requireStops(order)) || !FlashDeliveryStateMachine.canUserCancel(order.getStatus())) throw fail("flash.delivery.cancel.not.allowed");
        String reason = requiredReason(request);
        Date now = new Date();
        if (orderMapper.cancel(orderId, order.getStatus(), "USER", userId, reason, now) != 1) {
            throw fail("flash.delivery.state.changed");
        }
        writeLog(orderId, order.getStatus(), CANCELLED, "USER", userId, reason, now);
    }

    /** 用户（寄件人或收件人）确认收货：已送达推进为已完成。 */
    @Transactional
    public void confirmReceipt(Long userId, Long orderId) {
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!isParticipant(userId, order)) throw fail("flash.delivery.order.not.found");
        if (!allPicked(requireStops(order))) throw fail("flash.delivery.complete.not.allowed");
        Date now = new Date();
        if (orderMapper.transitionByParticipant(orderId, userId, DELIVERED, COMPLETED, now) != 1) {
            throw fail("flash.delivery.complete.not.allowed");
        }
        writeLog(orderId, DELIVERED, COMPLETED, "USER", userId, null, now);
    }

    /**
     * 骑手任务列表：按页签查询（newTask 可抢任务、toPickup 待取件、delivering 配送中、
     * completed 已送达/已完成、cancelled 已取消）。newTask 页签额外按骑手坐标做距离过滤和就近排序，
     * 并返回附近任务数与最高订单金额；其余页签按订单归属骑手查询。
     */
    public FlashDeliveryRiderOrderPageView riderOrders(Long riderId, int pageNum, int pageSize,
                                                        String tab, BigDecimal longitude, BigDecimal latitude) {
        InfoUser rider = requireRider(riderId);
        Set<String> acceptedPayTypes = acceptedRiderPayTypes(rider);
        if (!hasText(tab)) throw fail("flash.delivery.tab.invalid");
        String selectedTab = tab.trim();
        // lambda 无法捕获被重新赋值的参数，统一改用仅 newTask 携带坐标的有效变量。
        BigDecimal effectiveLongitude = "newTask".equals(selectedTab) ? longitude : null;
        BigDecimal effectiveLatitude = "newTask".equals(selectedTab) ? latitude : null;
        if ("newTask".equals(selectedTab)) {
            // 新任务派单按骑手选择的配送类型过滤；本人已接订单页签不受限制。
            if (!rider.supportsDeliveryType("FLASH")) throw fail("flash.delivery.rider.type.not.enabled");
            validateRiderCoordinates(effectiveLongitude, effectiveLatitude);
        }
        Integer riderVehicleType = riderVehicleType(rider);
        QueryWrapper<FlashDeliveryOrder> query = riderOrdersQuery(riderId, riderVehicleType, selectedTab,
                effectiveLongitude, effectiveLatitude, true, acceptedPayTypes);
        IPage<FlashDeliveryOrder> orders = orderMapper.selectPage(page(pageNum, pageSize), query);
        FlashDeliveryRiderOrderPageView result = new FlashDeliveryRiderOrderPageView();
        result.setRecords(orders.getRecords().stream()
                .map(order -> riderOrderListView(order, effectiveLongitude, effectiveLatitude)).toList());
        result.setTotal(orders.getTotal());
        result.setCurrent(orders.getCurrent());
        result.setSize(orders.getSize());
        if ("newTask".equals(selectedTab)) {
            result.setNearbyTaskCount(orders.getTotal());
            QueryWrapper<FlashDeliveryOrder> maximumQuery = riderOrdersQuery(riderId, riderVehicleType, selectedTab,
                    effectiveLongitude, effectiveLatitude, false, acceptedPayTypes)
                    .select("MAX(amount)");
            result.setHighestOrderAmount(firstLong(orderMapper.selectObjs(maximumQuery)));
        }
        return result;
    }

    /** 骑手任务详情：抢单前返回脱敏视图（隐藏联系人、电话、坐标和 PIN）；接单后仅中单骑手可见完整信息。 */
    public FlashDeliveryOrderDetailView riderDetail(Long riderId, Long orderId) {
        InfoUser rider = requireRider(riderId);
        FlashDeliveryOrder order = requireOrder(orderId);
        if (WAITING_ACCEPTANCE.equals(order.getStatus()) && order.getRiderId() == null) {
            // 不兼容闪送的骑手按订单不存在处理，避免泄露待抢任务信息。
            if (!isAvailableAt(order, new Date()) || !rider.supportsDeliveryType("FLASH")
                    || !isRiderVehicleCompatible(rider, order)) {
                throw fail("flash.delivery.order.not.found");
            }
            // 接单前显示取送文字地址，但隐藏联系人、电话、精确坐标、实际 PIN 和履约图片。
            return participantDetail(order, false, true);
        }
        if (!Objects.equals(riderId, order.getRiderId())) throw fail("flash.delivery.order.not.found");
        return participantDetail(order, false, false);
    }

    /** 原子抢单：骑手锁内完成互斥校验与条件更新，同一订单仅一名骑手成功。 */
    @Transactional
    public FlashDeliveryOrderDetailView accept(Long riderId, Long orderId) {
        return riderDeliveryLockService.withLock(riderId, () -> {
            FlashDeliveryOrder target = requireOrder(orderId);
            InfoUser rider = requireRider(riderId);
            if (!isRiderVehicleCompatible(rider, target)) throw fail("flash.delivery.order.not.found");
            // 账号资格、闪送/总任务容量与急送独占统一在骑手锁内复核，列表结果不能替代接单校验。
            riderDeliveryAcceptanceService.assertCanAcceptFlash(riderId, target.getDeliveryType());
            Date now = new Date();
            // Mapper 使用“待接单且 rider_id 为空”的条件更新，受影响行数为 1 才表示抢单成功。
            if (orderMapper.accept(orderId, riderId, now) != 1) {
                throw fail("flash.delivery.order.already.accepted");
            }
            writeLog(orderId, WAITING_ACCEPTANCE, ACCEPTED, "RIDER", riderId, null, now);
            return participantDetail(requireOrder(orderId), false, false);
        });
    }

    /** 骑手逐站取件：保存本站凭证，仅在全部取货站完成后推进订单为已取件。 */
    @Transactional
    public void pickup(Long riderId, Long orderId, FlashDeliveryProofRequest request) {
        pickupStation(riderId, orderId, request == null ? null : request.getStopId(), request);
    }

    /** 骑手送达：校验交付 PIN（启用时）并提交送达凭证，订单由已取件推进为已送达。 */
    @Transactional
    public void deliver(Long riderId, Long orderId, FlashDeliveryDeliverRequest request) {
        requireRider(riderId);
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!Objects.equals(riderId, order.getRiderId()) || !PICKED_UP.equals(order.getStatus())) {
            throw fail("flash.delivery.transition.not.allowed");
        }
        List<FlashDeliveryOrderStop> rows = requireStops(order);
        if (!allPicked(rows)) throw fail("flash.delivery.transition.not.allowed");
        if (Boolean.TRUE.equals(order.getPinRequired())
                && (request == null || !Objects.equals(order.getDeliveryPinCode(), trimToNull(request.getPinCode())))) {
            throw fail("flash.delivery.pin.invalid");
        }
        FlashDeliveryOrderStop delivery = rows.stream().filter(s -> "DELIVERY".equals(s.getStopType())).findFirst().orElseThrow();
        if (request != null && request.getStopId() != null && !Objects.equals(request.getStopId(), delivery.getId())) throw fail("flash.delivery.stop.invalid");
        List<String> urls = validateProofUrls(request == null ? null : request.getImageUrls(), true);
        Date now = new Date();
        if (orderMapper.transitionByRider(orderId, riderId, PICKED_UP, DELIVERED, "delivered_at", now) != 1) {
            throw fail("flash.delivery.transition.not.allowed");
        }
        delivery.setStatus("DELIVERED"); delivery.setDeliveredAt(now);
        if (stopMapper.updateById(delivery) != 1) throw fail("flash.delivery.state.changed");
        saveStationImages(orderId, delivery.getId(), "DELIVERY", "RIDER", riderId, urls, now);
        writeLog(orderId, PICKED_UP, DELIVERED, "RIDER", riderId, null, now);
    }

    /** 平台运价配置列表，按时段开始时间排序。 */
    public List<FlashDeliveryPricing> adminPricing() {
        return pricingMapper.selectList(new QueryWrapper<FlashDeliveryPricing>()
                .orderByAsc("start_time", "id"));
    }

    /** 新增运价配置：校验参数合法性与时段不重叠后入库，版本号从 1 开始。 */
    @Transactional
    public FlashDeliveryPricing createPricing(Long adminId, FlashDeliveryPricingRequest request) {
        validatePricingRequest(request, false);
        ensureNoPricingOverlap(request, null);
        Date now = new Date();
        FlashDeliveryPricing pricing = pricingFrom(request);
        pricing.setConfigVersion(1);
        pricing.setUpdatedBy(adminId);
        pricing.setCreateTime(now);
        pricing.setUpdateTime(now);
        pricingMapper.insert(pricing);
        return pricing;
    }

    /** 修改运价配置：按 configVersion 乐观锁条件更新，防止管理员并发互相覆盖。 */
    @Transactional
    public FlashDeliveryPricing updatePricing(Long adminId, Long pricingId,
                                               FlashDeliveryPricingRequest request) {
        validatePricingRequest(request, true);
        FlashDeliveryPricing preliminary = pricingId == null ? null : pricingMapper.selectById(pricingId);
        if (preliminary == null) throw fail("flash.delivery.pricing.not.found");
        FlashDeliveryPricing pricing = pricingMapper.selectById(pricingId);
        if (pricing == null) throw fail("flash.delivery.pricing.not.found");
        ensureNoPricingOverlap(request, pricingId);
        Date now = new Date();
        UpdateWrapper<FlashDeliveryPricing> update = new UpdateWrapper<FlashDeliveryPricing>()
                .eq("id", pricingId).eq("config_version", request.getConfigVersion())
                .set("vehicle_type", request.getVehicleType())
                .set("start_time", request.getStartTime())
                .set("end_time", request.getEndTime())
                .set("starting_distance", scaleDistance(request.getStartingDistance()))
                .set("starting_fare", request.getStartingFare())
                .set("distance", scaleDistance(request.getDistance()))
                .set("freight", request.getFreight())
                .set("urgent_rate", normalizeRate(request.getUrgentRate()))
                .set("minimum_urgent_fee", request.getMinimumUrgentFee())
                .set("updated_by", adminId)
                .set("update_time", now)
                .setSql("config_version = config_version + 1");
        // 版本条件防止两个管理员同时保存时后提交者静默覆盖先提交者。
        if (pricingMapper.update(null, update) != 1) throw fail("flash.delivery.pricing.changed");
        pricing.setVehicleType(request.getVehicleType());
        pricing.setStartTime(request.getStartTime());
        pricing.setEndTime(request.getEndTime());
        pricing.setStartingDistance(scaleDistance(request.getStartingDistance()));
        pricing.setStartingFare(request.getStartingFare());
        pricing.setDistance(scaleDistance(request.getDistance()));
        pricing.setFreight(request.getFreight());
        pricing.setUrgentRate(normalizeRate(request.getUrgentRate()));
        pricing.setMinimumUrgentFee(request.getMinimumUrgentFee());
        pricing.setConfigVersion(request.getConfigVersion() + 1);
        pricing.setUpdatedBy(adminId);
        pricing.setUpdateTime(now);
        return pricing;
    }

    /** 删除运价配置。 */
    @Transactional
    public void deletePricing(Long pricingId) {
        FlashDeliveryPricing preliminary = pricingId == null ? null : pricingMapper.selectById(pricingId);
        if (preliminary == null) {
            throw fail("flash.delivery.pricing.not.found");
        }
        FlashDeliveryPricing pricing = pricingMapper.selectById(pricingId);
        if (pricing == null) throw fail("flash.delivery.pricing.not.found");
        if (pricingMapper.deleteById(pricingId) != 1) throw fail("flash.delivery.pricing.not.found");
    }

    /** 平台订单分页：支持状态、业务场景、订单号模糊、寄件用户、骑手条件过滤。 */
    public IPage<FlashDeliveryOrder> adminOrders(int pageNum, int pageSize, String status,
                                                 String serviceType, String orderNo,
                                                 Long userId, Long riderId) {
        validateOptionalServiceType(serviceType);
        QueryWrapper<FlashDeliveryOrder> query = new QueryWrapper<FlashDeliveryOrder>().orderByDesc("id");
        optionalEq(query, "status", status);
        optionalEq(query, "service_type", serviceType);
        if (hasText(orderNo)) query.like("order_no", orderNo.trim());
        if (userId != null) query.eq("user_id", userId);
        if (riderId != null) query.eq("rider_id", riderId);
        return orderMapper.selectPage(page(pageNum, pageSize), query);
    }

    /** 平台订单审计详情：返回完整订单实体、全部凭证图片和状态日志。 */
    public FlashDeliveryAdminOrderDetailView adminDetail(Long orderId) {
        FlashDeliveryOrder order = requireOrder(orderId);
        FlashDeliveryAdminOrderDetailView view = new FlashDeliveryAdminOrderDetailView();
        view.setOrder(order);
        List<FlashDeliveryOrderStop> stationRows = stops(orderId);
        view.setPickupStopCount(order.getPickupStopCount()); view.setPickedUpStopCount(order.getPickedUpStopCount());
        view.setCanUserCancel(canUserCancel(order)); view.setCurrentTargetStopId(targetStopId(order, stationRows));
        view.setTargetAdjustments(adjustmentMapper.selectList(new QueryWrapper<FlashDeliveryTargetAdjustment>()
                .eq("order_id", orderId).orderByAsc("create_time", "id")));
        view.setImages(imageMapper.selectList(new QueryWrapper<FlashDeliveryOrderImage>()
                .eq("order_id", orderId).orderByAsc("proof_type", "sort_order")));
        view.setStops(stopViews(stationRows, true, view.getImages()));
        view.setHandoffImageUrls(view.getImages().stream().filter(i -> "HANDOFF".equals(i.getProofType()))
                .map(FlashDeliveryOrderImage::getImageUrl).toList());
        view.setLogs(logMapper.selectList(new QueryWrapper<FlashDeliveryOrderLog>()
                .eq("order_id", orderId).orderByAsc("create_time", "id")));
        return view;
    }

    /** 平台取消：任何非终态订单可取消，记录操作人与原因，用于异常履约人工收口。 */
    @Transactional
    public void adminCancel(Long adminId, Long orderId, FlashDeliveryReasonRequest request) {
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!FlashDeliveryStateMachine.canAdminCancel(order.getStatus())) throw fail("flash.delivery.cancel.not.allowed");
        String reason = requiredReason(request);
        List<FlashDeliveryOrderStop> rows = requireStops(order);
        if (request.getProblemStopId() == null || !hasText(request.getHandlingResult()) || tooLong(request.getHandlingResult(), 500)) {
            throw fail("flash.delivery.intervention.required");
        }
        requireStop(rows, request.getProblemStopId());
        boolean collected = anyPicked(rows);
        if ((collected && !hasText(request.getPickedGoodsDisposition())) || tooLong(request.getPickedGoodsDisposition(), 500)) {
            throw fail("flash.delivery.handoff.required");
        }
        List<String> proofs = validateProofUrls(request.getHandoffImageUrls(), collected);
        Date now = new Date();
        // 关闭异常订单前保存介入结果和物品去向；凭证写入失败时整笔事务回滚。
        UpdateWrapper<FlashDeliveryOrder> audit = new UpdateWrapper<FlashDeliveryOrder>().eq("id", orderId)
                .set("problem_stop_id", request.getProblemStopId()).set("handling_result", request.getHandlingResult().trim())
                .set("picked_goods_disposition", trimToNull(request.getPickedGoodsDisposition()));
        if (orderMapper.update(null, audit) != 1) throw fail("flash.delivery.state.changed");
        saveStationImages(orderId, request.getProblemStopId(), "HANDOFF", "ADMIN", adminId, proofs, now);
        if (orderMapper.cancel(orderId, order.getStatus(), "ADMIN", adminId, reason, now) != 1) throw fail("flash.delivery.state.changed");
        writeLog(orderId, order.getStatus(), CANCELLED, "ADMIN", adminId, reason, now);
    }

    /** 将已送达订单推进为已完成；平台手动与系统自动完成共用此入口，条件更新失败返回 false。 */
    @Transactional
    public boolean complete(Long operatorId, String operatorType, Long orderId) {
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!DELIVERED.equals(order.getStatus()) || !allPicked(requireStops(order))) return false;
        Date now = new Date();
        if (orderMapper.transitionByStatus(orderId, DELIVERED, COMPLETED, "completed_at", now) != 1) return false;
        writeLog(orderId, DELIVERED, COMPLETED, operatorType, operatorId, null, now);
        return true;
    }

    /** 骑手确认实际收款：仅本人已送达订单可确认，条件更新保证重复请求不重复写日志。 */
    @Transactional
    public void confirmPayment(Long riderId, Long orderId) {
        requireRider(riderId);
        FlashDeliveryOrder order = requireOrder(orderId);
        if (!Objects.equals(riderId, order.getRiderId())) throw fail("flash.delivery.order.not.found");
        if (!DELIVERED.equals(order.getStatus()) && !COMPLETED.equals(order.getStatus())) {
            throw fail("flash.delivery.payment.confirm.not.allowed");
        }
        if (Integer.valueOf(1).equals(order.getPaymentStatus())) return;
        Date now = new Date();
        if (orderMapper.update(null, new UpdateWrapper<FlashDeliveryOrder>()
                .eq("id", orderId).eq("payment_status", 0)
                .set("payment_status", 1).set("update_time", now)) == 1) {
            writeLog(orderId, order.getStatus(), order.getStatus(), "RIDER", riderId, "PAYMENT_CONFIRMED", now);
        }
    }

    /** 查询送达时间早于截止点且未完成的订单，供自动完成任务分批处理。 */
    public List<FlashDeliveryOrder> autoCompleteCandidates(Date deadline, int limit) {
        return orderMapper.selectAutoCompletable(deadline, Math.min(Math.max(limit, 1), 500));
    }

    /** 报价核心：校验枚举、物品、地址与预约窗后，按时段命中运价并计算路线距离，产出报价上下文。 */
    private QuoteContext calculateQuote(FlashDeliveryQuoteRequest request) {
        if (request == null) throw fail("flash.delivery.request.required");
        validateServiceType(request.getServiceType());
        validateDeliveryType(request.getDeliveryType());
        List<FlashDeliveryPickupRequest> pickups = normalizePickups(request);
        validatePickups(pickups, request.getDelivery());
        if (request.getTipAmount() == null || request.getTipAmount() < 0) throw fail("flash.delivery.tip.invalid");
        Date now = new Date();
        String deliveryMode = normalizeDeliveryMode(request.getDeliveryMode());
        validateSchedule(deliveryMode, request.getScheduledPickupStartAt(), request.getScheduledPickupEndAt(), now);
        Date pricingDate = "SCHEDULED".equals(deliveryMode) ? request.getScheduledPickupStartAt() : now;
        Integer selectedVehicle = requireVehicleType(request.getVehicleType());
        FlashDeliveryPricing pricing = findPricingAt(pricingTargetTime(pricingDate), selectedVehicle);
        RouteDistance route = pickupRoute(pickups, request.getDelivery(), selectedVehicle);
        FlashDeliveryPriceBreakdown breakdown = pricingCalculator.calculateBreakdown(pricing,
                route.distanceMeters(), request.getDeliveryType(), request.getTipAmount());
        return new QuoteContext(pricing, route, breakdown, pickups);
    }

    /** 查询指定时刻命中的运价配置，未配置时直接报错。 */
    private FlashDeliveryPricing findPricingAt(String targetTime, Integer vehicleType) {
        FlashDeliveryPricing pricing = findPricingAtOrNull(targetTime, vehicleType);
        if (pricing == null) throw fail("flash.delivery.pricing.not.available");
        return pricing;
    }

    /** 查询命中运价；命中多条说明配置重叠，报错交由平台修正。 */
    private FlashDeliveryPricing findPricingAtOrNull(String targetTime, Integer vehicleType) {
        List<FlashDeliveryPricing> pricing = pricingMapper.selectAtTime(targetTime, vehicleType);
        if (pricing == null || pricing.isEmpty()) return null;
        if (pricing.size() > 1) throw fail("flash.delivery.pricing.overlap");
        return pricing.get(0);
    }

    /** 校验运价请求：时间格式与区间顺序、各金额取值范围及修改时的版本号。 */
    private void validatePricingRequest(FlashDeliveryPricingRequest request, boolean requireVersion) {
        if (request == null) throw fail("flash.delivery.pricing.invalid");
        BigDecimal startingDistance = normalizeDistance(request.getStartingDistance());
        BigDecimal distance = normalizeDistance(request.getDistance());
        BigDecimal urgentRate = normalizeRate(request.getUrgentRate());
        if (!FlashDeliveryVehicleType.isSupported(request.getVehicleType())
                || !validStartTime(request.getStartTime()) || !validEndTime(request.getEndTime())
                || toMinute(request.getStartTime()) >= toMinute(request.getEndTime())
                || startingDistance == null || startingDistance.signum() <= 0
                || startingDistance.compareTo(MAX_PRICING_DISTANCE) > 0
                || request.getStartingFare() == null || request.getStartingFare() <= 0
                || distance == null || distance.signum() <= 0
                || distance.compareTo(MAX_PRICING_DISTANCE) > 0
                || request.getFreight() == null || request.getFreight() <= 0
                || urgentRate == null || urgentRate.signum() < 0
                || urgentRate.compareTo(MAX_PRICING_DISTANCE) > 0
                || request.getMinimumUrgentFee() == null || request.getMinimumUrgentFee() < 0
                || requireVersion && (request.getConfigVersion() == null || request.getConfigVersion() <= 0)) {
            throw fail("flash.delivery.pricing.invalid");
        }
    }

    /** 确保新时段与既有运价不重叠，excludedId 用于修改时排除自身。 */
    private void ensureNoPricingOverlap(FlashDeliveryPricingRequest request, Long excludedId) {
        if (pricingMapper.countOverlapping(request.getStartTime(), request.getEndTime(), request.getVehicleType(), excludedId) > 0) {
            throw fail("flash.delivery.pricing.overlap");
        }
    }

    /** 将运价请求转换为实体，距离与比例统一保留两位小数。 */
    private FlashDeliveryPricing pricingFrom(FlashDeliveryPricingRequest request) {
        FlashDeliveryPricing pricing = new FlashDeliveryPricing();
        pricing.setVehicleType(request.getVehicleType());
        pricing.setStartTime(request.getStartTime());
        pricing.setEndTime(request.getEndTime());
        pricing.setStartingDistance(scaleDistance(request.getStartingDistance()));
        pricing.setStartingFare(request.getStartingFare());
        pricing.setDistance(scaleDistance(request.getDistance()));
        pricing.setFreight(request.getFreight());
        pricing.setUrgentRate(normalizeRate(request.getUrgentRate()));
        pricing.setMinimumUrgentFee(request.getMinimumUrgentFee());
        return pricing;
    }

    private boolean validStartTime(String value) {
        return value != null && value.matches("(?:[01]\\d|2[0-3]):[0-5]\\d");
    }

    private boolean validEndTime(String value) {
        return "24:00".equals(value) || validStartTime(value);
    }

    private int toMinute(String value) {
        if ("24:00".equals(value)) return 24 * 60;
        return Integer.parseInt(value.substring(0, 2)) * 60 + Integer.parseInt(value.substring(3));
    }

    private BigDecimal scaleDistance(BigDecimal value) {
        return normalizeDistance(value);
    }

    private BigDecimal normalizeDistance(BigDecimal value) {
        return value == null ? null : value.setScale(2, RoundingMode.HALF_UP);
    }

    private BigDecimal normalizeRate(BigDecimal value) {
        return value == null ? null : value.setScale(2, RoundingMode.HALF_UP);
    }

    /** 状态、图片和日志处于同一事务；任一图片写入失败会回滚本次业务操作。 */
    private void saveImages(Long orderId, String proofType, String operatorType,
                            Long operatorId, List<String> urls, Date now) {
        for (int index = 0; index < urls.size(); index++) {
            FlashDeliveryOrderImage image = new FlashDeliveryOrderImage();
            image.setOrderId(orderId);
            image.setProofType(proofType);
            image.setImageUrl(urls.get(index));
            image.setSortOrder(index);
            image.setOperatorType(operatorType);
            image.setOperatorId(operatorId);
            image.setCreateTime(now);
            imageMapper.insert(image);
        }
    }

    /** 校验凭证图片 URL：必填时 1 至 9 张，每项为合法 URI 且不超过 1000 字符。 */
    private List<String> validateProofUrls(List<String> values, boolean required) {
        if (values == null || values.isEmpty()) {
            if (!required) return List.of();
            throw fail("flash.delivery.proof.required");
        }
        if (values.size() > 9) throw fail("flash.delivery.proof.too.many");
        List<String> urls = new ArrayList<>();
        for (String value : values) {
            try {
                String url = value == null ? null : value.trim();
                if (url == null || url.isEmpty() || url.length() > 1000) {
                    throw new IllegalArgumentException();
                }
                URI.create(url);
                urls.add(url);
            } catch (IllegalArgumentException exception) {
                throw fail("flash.delivery.proof.url.invalid");
            }
        }
        return urls;
    }

    /** 组装用户或骑手视角详情；hideSensitiveFields 为 true 时按抢单前脱敏返回。 */
    private FlashDeliveryOrderDetailView participantDetail(FlashDeliveryOrder order,
                                                           boolean userView,
                                                           boolean hideSensitiveFields) {
        FlashDeliveryOrderDetailView view = detailOrderView(order, !hideSensitiveFields);
        if (!hideSensitiveFields) view.setOrderVersion(order.getVersion());
        List<FlashDeliveryOrderStop> stationRows = stops(order.getId());
        List<FlashDeliveryOrderImage> stationImages = hideSensitiveFields ? List.of() : imageMapper.selectList(currentRead(
                new QueryWrapper<FlashDeliveryOrderImage>().eq("order_id", order.getId()).orderByAsc("proof_type", "sort_order")));
        view.setStops(stopViews(stationRows, !hideSensitiveFields, stationImages));
        view.setCurrentTargetStopId(targetStopId(order, stationRows));
        if (!hideSensitiveFields) {
            view.setTargetAdjustments(adjustmentMapper.selectList(currentRead(new QueryWrapper<FlashDeliveryTargetAdjustment>()
                    .eq("order_id", order.getId()).orderByAsc("create_time", "id"))));
        }
        if (userView) {
            view.setDeliveryPinCode(Boolean.TRUE.equals(order.getPinRequired()) ? order.getDeliveryPinCode() : null);
            view.setRider(riderSummary(order));
        }
        if (!hideSensitiveFields && order.getId() != null) {
            groupImageUrls(view, stationImages);
        }
        return view;
    }

    /** 订单实体转用户端订单卡片。 */
    private FlashDeliveryUserOrderListView userOrderListView(FlashDeliveryOrder order) {
        FlashDeliveryUserOrderListView view = new FlashDeliveryUserOrderListView();
        view.setId(order.getId());
        view.setOrderNo(order.getOrderNo());
        view.setServiceType(order.getServiceType());
        view.setDeliveryType(order.getDeliveryType());
        view.setVehicleType(vehicleTypeOf(order));
        view.setStatus(order.getStatus());
        view.setPickupStopCount(order.getPickupStopCount());
        view.setPickedUpStopCount(order.getPickedUpStopCount());
        view.setCanUserCancel(canUserCancel(order));
        view.setOrderVersion(order.getVersion());
        view.setPackageType(order.getPackageType());
        view.setQuantity(order.getQuantity());
        view.setWeightRange(order.getWeightRange());
        view.setDeliveryMode(order.getDeliveryMode());
        view.setScheduledPickupStartAt(order.getScheduledPickupStartAt());
        view.setScheduledPickupEndAt(order.getScheduledPickupEndAt());
        view.setPickupAddress(order.getPickupAddress());
        view.setPickupDetailAddress(order.getPickupAddressDetail());
        view.setDeliveryAddress(order.getDeliveryAddress());
        view.setDeliveryDetailAddress(order.getDeliveryAddressDetail());
        view.setEstimatedDurationSeconds(order.getEstimatedDurationSeconds());
        view.setBaseDeliveryFee(order.getBaseDeliveryFee());
        view.setUrgentFee(order.getUrgentFee());
        view.setTipAmount(order.getTipAmount());
        view.setAmount(order.getAmount());
        view.setCurrency(order.getCurrency());
        view.setPaymentStatus(order.getPaymentStatus());
        view.setDeliveredAt(order.getDeliveredAt());
        view.setCreateTime(order.getCreateTime());
        return view;
    }

    /** 订单实体转骑手端任务卡片，可附带骑手到取件点的直线距离。 */
    private FlashDeliveryRiderOrderListView riderOrderListView(FlashDeliveryOrder order,
                                                                 BigDecimal longitude, BigDecimal latitude) {
        FlashDeliveryRiderOrderListView view = new FlashDeliveryRiderOrderListView();
        view.setId(order.getId());
        view.setOrderNo(order.getOrderNo());
        view.setServiceType(order.getServiceType());
        view.setDeliveryType(order.getDeliveryType());
        view.setVehicleType(vehicleTypeOf(order));
        view.setStatus(order.getStatus());
        view.setPickupStopCount(order.getPickupStopCount());
        view.setPickedUpStopCount(order.getPickedUpStopCount());
        view.setCanUserCancel(canUserCancel(order));
        view.setPackageType(order.getPackageType());
        view.setQuantity(order.getQuantity());
        view.setWeightRange(order.getWeightRange());
        view.setSpecification(order.getSpecification());
        view.setDeliveryMode(order.getDeliveryMode());
        view.setScheduledPickupStartAt(order.getScheduledPickupStartAt());
        view.setScheduledPickupEndAt(order.getScheduledPickupEndAt());
        view.setPinRequired(order.getPinRequired());
        view.setPickupAddress(order.getPickupAddress());
        view.setPickupDetailAddress(order.getPickupAddressDetail());
        view.setDeliveryAddress(order.getDeliveryAddress());
        view.setDeliveryDetailAddress(order.getDeliveryAddressDetail());
        view.setPayType(order.getPayType());
        view.setPaymentStatus(order.getPaymentStatus());
        view.setPickupDistanceMeters(distanceMeters(longitude, latitude,
                order.getPickupLongitude(), order.getPickupLatitude()));
        view.setDistanceMeters(order.getDistanceMeters());
        view.setEstimatedDurationSeconds(order.getEstimatedDurationSeconds());
        view.setBaseDeliveryFee(order.getBaseDeliveryFee());
        view.setDistanceFee(order.getDistanceFee());
        view.setUrgentFee(order.getUrgentFee());
        view.setTipAmount(order.getTipAmount());
        view.setAmount(order.getAmount());
        view.setCurrency(order.getCurrency());
        view.setCreateTime(order.getCreateTime());
        return view;
    }

    /** 订单实体转详情基础视图。 */
    private FlashDeliveryOrderDetailView detailOrderView(FlashDeliveryOrder order, boolean includeSensitiveFields) {
        FlashDeliveryOrderDetailView view = new FlashDeliveryOrderDetailView();
        populateOrderView(view, order, includeSensitiveFields);
        return view;
    }

    /** 按凭证类型把图片分组为寄件、取件、送达三组 URL。 */
    private void groupImageUrls(FlashDeliveryOrderDetailView view, List<FlashDeliveryOrderImage> images) {
        List<String> sender = new ArrayList<>();
        List<String> pickup = new ArrayList<>();
        List<String> delivery = new ArrayList<>();
        for (FlashDeliveryOrderImage image : images) {
            if ("SENDER".equals(image.getProofType())) sender.add(image.getImageUrl());
            else if ("PICKUP".equals(image.getProofType())) pickup.add(image.getImageUrl());
            else if ("DELIVERY".equals(image.getProofType())) delivery.add(image.getImageUrl());
        }
        view.setSenderImageUrls(sender);
        view.setPickupImageUrls(pickup);
        view.setDeliveryImageUrls(delivery);
    }

    /** 运价实体转首页服务摘要视图。 */
    private FlashDeliveryServiceView serviceView(FlashDeliveryPricing pricing, String serviceType) {
        FlashDeliveryServiceView view = new FlashDeliveryServiceView();
        view.setServiceType(serviceType);
        view.setPricingId(pricing.getId());
        view.setStartTime(pricing.getStartTime());
        view.setEndTime(pricing.getEndTime());
        view.setStartingDistance(pricing.getStartingDistance());
        view.setStartingFare(pricing.getStartingFare());
        view.setDistance(pricing.getDistance());
        view.setFreight(pricing.getFreight());
        view.setUrgentRate(pricing.getUrgentRate());
        view.setMinimumUrgentFee(pricing.getMinimumUrgentFee());
        view.setPricingVersion(pricing.getConfigVersion());
        view.setCurrency("TWD");
        return view;
    }

    /** 将订单实体的公共字段填充到视图，includeSensitiveFields 控制是否包含敏感字段。 */
    private void populateOrderView(FlashDeliveryOrderView view, FlashDeliveryOrder order,
                                   boolean includeSensitiveFields) {
        view.setId(order.getId());
        view.setOrderNo(order.getOrderNo());
        view.setServiceType(order.getServiceType());
        view.setDeliveryType(order.getDeliveryType());
        view.setVehicleType(vehicleTypeOf(order));
        view.setStatus(order.getStatus());
        view.setPickupStopCount(order.getPickupStopCount());
        view.setPickedUpStopCount(order.getPickedUpStopCount());
        view.setCanUserCancel(canUserCancel(order));
        view.setPackageType(order.getPackageType());
        view.setQuantity(order.getQuantity());
        view.setWeightRange(order.getWeightRange());
        view.setSpecification(order.getSpecification());
        view.setDeliveryMode(order.getDeliveryMode());
        view.setScheduledPickupStartAt(order.getScheduledPickupStartAt());
        view.setScheduledPickupEndAt(order.getScheduledPickupEndAt());
        view.setPinRequired(order.getPinRequired());
        view.setPickup(addressView(order, true, includeSensitiveFields));
        view.setDelivery(addressView(order, false, includeSensitiveFields));
        view.setDistanceMeters(order.getDistanceMeters());
        view.setDistanceSource(order.getDistanceSource());
        view.setEstimatedDurationSeconds(order.getEstimatedDurationSeconds());
        view.setBaseDeliveryFee(order.getBaseDeliveryFee());
        view.setDistanceFee(order.getDistanceFee());
        view.setUrgentFee(order.getUrgentFee());
        view.setTipAmount(order.getTipAmount());
        view.setAmount(order.getAmount());
        view.setCurrency(order.getCurrency());
        view.setPayType(order.getPayType());
        view.setPaymentStatus(order.getPaymentStatus());
        view.setUserNote(includeSensitiveFields ? order.getUserNote() : null);
        view.setAcceptedAt(order.getAcceptedAt());
        view.setPickedUpAt(order.getPickedUpAt());
        view.setDeliveredAt(order.getDeliveredAt());
        view.setCompletedAt(order.getCompletedAt());
        view.setCancelledAt(order.getCancelledAt());
        view.setCancelReason(order.getCancelReason());
        view.setCreateTime(order.getCreateTime());
        view.setUpdateTime(order.getUpdateTime());
    }

    /** 从订单实体提取取件或收件地址视图；脱敏时不返回联系人、电话和坐标。 */
    private FlashDeliveryAddressView addressView(FlashDeliveryOrder order, boolean pickup,
                                                 boolean includeSensitiveFields) {
        FlashDeliveryAddressView view = new FlashDeliveryAddressView();
        if (pickup) {
            view.setName(includeSensitiveFields ? order.getPickupName() : null);
            view.setPhone(includeSensitiveFields ? order.getPickupPhone() : null);
            view.setAddress(order.getPickupAddress()); view.setAddressDetail(order.getPickupAddressDetail());
            view.setCity(order.getPickupCity()); view.setArea(order.getPickupArea());
            view.setHandoffMethod(order.getPickupHandoffMethod());
            view.setLongitude(includeSensitiveFields ? order.getPickupLongitude() : null);
            view.setLatitude(includeSensitiveFields ? order.getPickupLatitude() : null);
        } else {
            view.setName(includeSensitiveFields ? order.getDeliveryName() : null);
            view.setPhone(includeSensitiveFields ? order.getDeliveryPhone() : null);
            view.setAddress(order.getDeliveryAddress()); view.setAddressDetail(order.getDeliveryAddressDetail());
            view.setCity(order.getDeliveryCity()); view.setArea(order.getDeliveryArea());
            view.setHandoffMethod(order.getDeliveryHandoffMethod());
            view.setLongitude(includeSensitiveFields ? order.getDeliveryLongitude() : null);
            view.setLatitude(includeSensitiveFields ? order.getDeliveryLatitude() : null);
        }
        return view;
    }

    /** 组装骑手公开资料；仅已接单或已取件状态附带骑手实时位置。 */
    private FlashDeliveryRiderSummaryView riderSummary(FlashDeliveryOrder order) {
        if (order.getRiderId() == null) return null;
        InfoUser rider = userMapper.selectInfoUserByUserId(order.getRiderId());
        if (rider == null) return null;
        FlashDeliveryRiderSummaryView view = new FlashDeliveryRiderSummaryView();
        view.setName(hasText(rider.getNickName()) ? rider.getNickName() : rider.getUserName());
        view.setAvatar(rider.getAvatar());
        view.setRating(rider.getStar());
        view.setImUserId(rider.getImUserId() == null ? null : String.valueOf(rider.getImUserId()));
        if (ACCEPTED.equals(order.getStatus()) || PICKED_UP.equals(order.getStatus())) {
            view.setLongitude(rider.getLongitude());
            view.setLatitude(rider.getLatitude());
        }
        return view;
    }

    /** 把费用明细写入报价视图。 */
    private void applyBreakdown(FlashDeliveryQuoteView view, FlashDeliveryPriceBreakdown breakdown) {
        view.setBillableDistance(breakdown.getBillableDistance());
        view.setDistanceFee(breakdown.getDistanceFee());
        view.setBaseDeliveryFee(breakdown.getBaseDeliveryFee());
        view.setUrgentFee(breakdown.getUrgentFee());
        view.setTipAmount(breakdown.getTipAmount());
        view.setAmount(breakdown.getAmount());
    }

    /** 把请求地址复制为订单取件或收件快照字段。 */
    private void copyAddress(FlashDeliveryAddressRequest source, FlashDeliveryOrder target, boolean pickup) {
        if (pickup) {
            target.setPickupName(source.getName().trim()); target.setPickupPhone(source.getPhone().trim());
            target.setPickupAddress(source.getAddress().trim()); target.setPickupAddressDetail(trimToNull(source.getAddressDetail()));
            target.setPickupCity(trimToNull(source.getCity())); target.setPickupArea(trimToNull(source.getArea()));
            target.setPickupHandoffMethod(trimToNull(source.getHandoffMethod()));
            target.setPickupLongitude(source.getLongitude()); target.setPickupLatitude(source.getLatitude());
        } else {
            target.setDeliveryName(source.getName().trim()); target.setDeliveryPhone(source.getPhone().trim());
            target.setDeliveryAddress(source.getAddress().trim()); target.setDeliveryAddressDetail(trimToNull(source.getAddressDetail()));
            target.setDeliveryCity(trimToNull(source.getCity())); target.setDeliveryArea(trimToNull(source.getArea()));
            target.setDeliveryHandoffMethod(trimToNull(source.getHandoffMethod()));
            target.setDeliveryLongitude(source.getLongitude()); target.setDeliveryLatitude(source.getLatitude());
        }
    }

    /** 校验地址请求：必填项、长度限制和经纬度取值范围。 */
    private void validateAddress(FlashDeliveryAddressRequest address) {
        if (address == null || !hasText(address.getName()) || !hasText(address.getPhone())
                || !hasText(address.getAddress()) || address.getLatitude() == null || address.getLongitude() == null
                || address.getName().trim().length() > 64 || address.getPhone().trim().length() > 32
                || address.getAddress().trim().length() > 255
                || (address.getAddressDetail() != null && address.getAddressDetail().trim().length() > 255)
                || tooLong(address.getCity(), 64) || tooLong(address.getArea(), 64)
                || tooLong(address.getHandoffMethod(), 40)
                || address.getLatitude().compareTo(BigDecimal.valueOf(-90)) < 0
                || address.getLatitude().compareTo(BigDecimal.valueOf(90)) > 0
                || address.getLongitude().compareTo(BigDecimal.valueOf(-180)) < 0
                || address.getLongitude().compareTo(BigDecimal.valueOf(180)) > 0) {
            throw fail("flash.delivery.address.invalid");
        }
    }

    /** 收件手机号归一化后唯一匹配普通用户作为收件人；匹配零个或多个视为无收件人。 */
    private Long resolveReceiverUserId(String phone) {
        if (!hasText(phone)) return null;
        StringBuilder normalized = new StringBuilder(phone.length());
        for (int index = 0; index < phone.length(); index++) {
            char value = phone.charAt(index);
            if (Character.isWhitespace(value) || value == '+' || value == '-'
                    || value == '(' || value == ')') {
                continue;
            }
            if (value < '0' || value > '9') return null;
            normalized.append(value);
        }
        if (normalized.isEmpty()) return null;
        List<Long> matches = userMapper.selectOrdinaryUserIdsByNormalizedPhone(normalized.toString());
        return matches != null && matches.size() == 1 ? matches.get(0) : null;
    }

    /** 判断用户是否为订单寄件人或匹配收件人。 */
    private boolean isParticipant(Long userId, FlashDeliveryOrder order) {
        return Objects.equals(userId, order.getUserId())
                || Objects.equals(userId, order.getReceiverUserId());
    }

    /** 校验 token 用户为骑手（userType=2）并返回其资料。 */
    private InfoUser requireRider(Long riderId) {
        InfoUser rider = riderId == null ? null : userMapper.selectInfoUserByUserId(riderId);
        if (rider == null || !"2".equals(rider.getUserType())) throw fail("flash.delivery.rider.required");
        return rider;
    }

    /** 加载订单，不存在时统一按订单不存在报错。 */
    private FlashDeliveryOrder requireOrder(Long orderId) {
        FlashDeliveryOrder order = orderId == null ? null : orderMapper.selectById(orderId);
        if (order == null) throw fail("flash.delivery.order.not.found");
        return order;
    }

    /** 写入状态变更审计日志。 */
    private void writeLog(Long orderId, String from, String to, String operatorType,
                          Long operatorId, String reason, Date now) {
        FlashDeliveryOrderLog log = new FlashDeliveryOrderLog();
        log.setOrderId(orderId); log.setFromStatus(from); log.setToStatus(to);
        log.setOperatorType(operatorType); log.setOperatorId(operatorId); log.setReason(reason); log.setCreateTime(now);
        logMapper.insert(log);
    }

    /** 校验并提取取消原因。 */
    private String requiredReason(FlashDeliveryReasonRequest request) {
        if (request == null || !hasText(request.getReason()) || request.getReason().trim().length() > 500) {
            throw fail("flash.delivery.cancel.reason.required");
        }
        return request.getReason().trim();
    }

    private void validateServiceType(String value) {
        if (!hasText(value) || !SERVICE_TYPES.contains(value)) throw fail("flash.delivery.service.type.invalid");
    }

    private void validateDeliveryType(String value) {
        if (!hasText(value) || !DELIVERY_TYPES.contains(value)) {
            throw fail("flash.delivery.delivery.type.invalid");
        }
    }

    /** 支付方式由 031 闸门校验；闪送维度按平台开关判定，缺省现金。 */
    private String normalizePayType(String payType) {
        String value = hasText(payType) ? payType.trim() : PAY_TYPE_CASH;
        paymentMethodGateService.assertUsable(value,
                PaymentMethodGateService.GateScope.RIDER_FLASH, null, null);
        return value;
    }

    /** 将时间转为台北时区 HH:mm，用于命中运价时段。 */
    private String pricingTargetTime(Date date) {
        return PRICING_TIME_FORMAT.format(Instant.ofEpochMilli(date.getTime())
                .atZone(TAIPEI).toLocalTime());
    }

    /** 比对客户端回传报价与服务端最新报价是否完全一致。 */
    private boolean matchesQuotedPrice(FlashDeliveryCreateRequest request, FlashDeliveryQuoteView latest) {
        return Objects.equals(request.getPricingId(), latest.getPricingId())
                && Objects.equals(request.getPricingVersion(), latest.getPricingVersion())
                && Objects.equals(request.getQuotedBaseDeliveryFee(), latest.getBaseDeliveryFee())
                && Objects.equals(request.getQuotedDistanceFee(), latest.getDistanceFee())
                && Objects.equals(request.getQuotedUrgentFee(), latest.getUrgentFee())
                && Objects.equals(request.getQuotedAmount(), latest.getAmount());
    }

    private void validateOptionalServiceType(String value) {
        if (hasText(value)) validateServiceType(value);
    }

    private void requireUserId(Long userId) {
        if (userId == null || userId <= 0) throw fail("flash.delivery.auth.required");
    }

    /** 构造分页对象并夹紧页码与每页数量（1 至 100）。 */
    private Page<FlashDeliveryOrder> page(int pageNum, int pageSize) {
        return new Page<>(Math.max(1, pageNum), Math.min(Math.max(1, pageSize), 100));
    }

    /** 分页结果实体转换，保留分页元数据。 */
    private <T> IPage<T> mapPage(IPage<FlashDeliveryOrder> source,
                                 Function<FlashDeliveryOrder, T> mapper) {
        Page<T> result = new Page<>(source.getCurrent(), source.getSize(), source.getTotal());
        result.setRecords(source.getRecords().stream().map(mapper).toList());
        return result;
    }

    /** 按页签构建骑手任务查询：newTask 限定可抢状态与时间窗，可选距离过滤和就近排序。 */
    private QueryWrapper<FlashDeliveryOrder> riderOrdersQuery(Long riderId, Integer riderVehicleType, String tab,
                                                                BigDecimal longitude, BigDecimal latitude,
                                                                boolean orderResults, Set<String> acceptedPayTypes) {
        QueryWrapper<FlashDeliveryOrder> query = new QueryWrapper<>();
        Date now = new Date();
        switch (tab) {
            case "newTask" -> {
                query.eq("status", WAITING_ACCEPTANCE).isNull("rider_id")
                        .eq("vehicle_type", riderVehicleType)
                        .and(item -> item.eq("delivery_mode", "NOW")
                                .or().le("scheduled_pickup_start_at", now));
                // 同时满足车型和骑手已接受的支付方式，列表不能替代接单接口的资格复核。
                if (acceptedPayTypes.isEmpty()) query.apply("1 = 0");
                else query.in("pay_type", acceptedPayTypes);
                if (longitude != null) {
                    Integer limitKm = newTaskDistanceLimit();
                    if (limitKm != null) {
                        query.apply("ST_Distance_Sphere(point(pickup_longitude, pickup_latitude), point({0}, {1})) <= {2}",
                                longitude, latitude, limitKm.longValue() * 1000L);
                    }
                    if (orderResults) {
                        query.orderByAsc("ST_Distance_Sphere(point(pickup_longitude, pickup_latitude), point(" + longitude
                                + ", " + latitude + "))");
                    }
                } else if (orderResults) {
                    query.orderByDesc("create_time");
                }
            }
            case "toPickup" -> {
                query.eq("rider_id", riderId).eq("status", ACCEPTED);
                if (orderResults) query.orderByAsc("create_time");
            }
            case "delivering" -> {
                query.eq("rider_id", riderId).eq("status", PICKED_UP);
                if (orderResults) query.orderByAsc("create_time");
            }
            case "completed" -> {
                query.eq("rider_id", riderId).in("status", DELIVERED, COMPLETED);
                if (orderResults) query.orderByDesc("create_time");
            }
            case "cancelled" -> {
                query.eq("rider_id", riderId).eq("status", CANCELLED);
                if (orderResults) query.orderByDesc("create_time");
            }
            default -> throw fail("flash.delivery.tab.invalid");
        }
        return query;
    }

    /** 骑手未设置闪送收款方式时继承平台开放项；现金单按既有规则始终可见。 */
    private Set<String> acceptedRiderPayTypes(InfoUser rider) {
        String csv = rider.getFlashPayMethods();
        List<String> groups = new ArrayList<>();
        if (!hasText(csv)) {
            for (PaymentMethodGateService.PayMethodOption option : paymentMethodGateService.listAvailable(
                    PaymentMethodGateService.GateScope.RIDER_FLASH, null, null)) {
                if (!groups.contains(option.getMethodCode())) groups.add(option.getMethodCode());
            }
        } else {
            for (String part : csv.split(",")) {
                if (hasText(part)) groups.add(part.trim());
            }
        }
        Set<String> payTypes = new LinkedHashSet<>();
        payTypes.add(PAY_TYPE_CASH);
        for (String group : groups) payTypes.addAll(PaymentMethodGateService.payTypesOf(group));
        return payTypes;
    }

    /** 校验骑手坐标：经纬度必须成对出现且在合法范围。 */
    private void validateRiderCoordinates(BigDecimal longitude, BigDecimal latitude) {
        if ((longitude == null) != (latitude == null)
                || longitude != null && (longitude.compareTo(BigDecimal.valueOf(-180)) < 0
                || longitude.compareTo(BigDecimal.valueOf(180)) > 0
                || latitude.compareTo(BigDecimal.valueOf(-90)) < 0
                || latitude.compareTo(BigDecimal.valueOf(90)) > 0)) {
            throw fail("flash.delivery.coordinates.invalid");
        }
    }

    /** 读取字典 sys_qs_newtask_distance 的新任务距离上限（公里）；缺失或非法时不限距离。 */
    private Integer newTaskDistanceLimit() {
        try {
            List<SysDictData> values = DictUtils.getDictCache("sys_qs_newtask_distance");
            if (values != null && !values.isEmpty()) {
                int limit = Integer.parseInt(values.get(0).getDictValue());
                return limit > 0 ? limit : null;
            }
        } catch (Exception ignored) {
            // Keep the established rider-list behaviour: absent or malformed configuration disables distance filtering.
        }
        return null;
    }

    /** Haversine 球面直线距离（米），用于骑手列表展示距取件点的距离。 */
    private Integer distanceMeters(BigDecimal longitude, BigDecimal latitude,
                                   BigDecimal targetLongitude, BigDecimal targetLatitude) {
        if (longitude == null || targetLongitude == null || targetLatitude == null) return null;
        double latitudeRadians = Math.toRadians(latitude.doubleValue());
        double targetLatitudeRadians = Math.toRadians(targetLatitude.doubleValue());
        double latitudeDelta = targetLatitudeRadians - latitudeRadians;
        double longitudeDelta = Math.toRadians(targetLongitude.doubleValue() - longitude.doubleValue());
        double value = Math.sin(latitudeDelta / 2) * Math.sin(latitudeDelta / 2)
                + Math.cos(latitudeRadians) * Math.cos(targetLatitudeRadians)
                * Math.sin(longitudeDelta / 2) * Math.sin(longitudeDelta / 2);
        return (int) Math.round(6_371_000D * 2D * Math.atan2(Math.sqrt(value), Math.sqrt(1D - value)));
    }

    /** 从 selectObjs 聚合结果中取第一个 Long 值。 */
    private Long firstLong(List<Object> values) {
        if (values == null || values.isEmpty() || values.get(0) == null) return null;
        Object value = values.get(0);
        if (value instanceof Number number) return number.longValue();
        return Long.valueOf(String.valueOf(value));
    }

    /** 取件方式归一化：缺省按 NOW 处理，非法值报错。 */
    private String normalizeDeliveryMode(String value) {
        String mode = hasText(value) ? value.trim() : "NOW";
        if (!DELIVERY_MODES.contains(mode)) throw fail("flash.delivery.mode.invalid");
        return mode;
    }

    /** 校验预约窗：NOW 不得携带时间；SCHEDULED 必须是未来 3 天内恰好 30 分钟的窗。 */
    private void validateSchedule(String mode, Date start, Date end, Date now) {
        if ("NOW".equals(mode)) {
            if (start != null || end != null) throw fail("flash.delivery.schedule.invalid");
            return;
        }
        if (start == null || end == null || start.before(now)
                || end.getTime() - start.getTime() != SCHEDULE_SLOT_MILLIS
                || start.getTime() - now.getTime() > MAX_SCHEDULE_DELAY_MILLIS) {
            throw fail("flash.delivery.schedule.invalid");
        }
    }

    /** 判断订单当前是否开放抢单：立即单随时可抢，预约单到点开放。 */
    private boolean isAvailableAt(FlashDeliveryOrder order, Date now) {
        return "NOW".equals(order.getDeliveryMode())
                || "SCHEDULED".equals(order.getDeliveryMode())
                && order.getScheduledPickupStartAt() != null
                && !order.getScheduledPickupStartAt().after(now);
    }

    private void optionalEq(QueryWrapper<FlashDeliveryOrder> query, String column, String value) {
        if (hasText(value)) query.eq(column, value.trim());
    }

    private boolean hasText(String value) { return StringUtils.isNotEmpty(value) && !value.trim().isEmpty(); }
    private String trimToNull(String value) { return hasText(value) ? value.trim() : null; }
    private boolean tooLong(String value, int max) { return value != null && value.trim().length() > max; }
    private boolean sameAddressText(FlashDeliveryAddressRequest left, FlashDeliveryAddressRequest right) {
        return normalized(left.getAddress()).equals(normalized(right.getAddress()))
                && normalized(left.getAddressDetail()).equals(normalized(right.getAddressDetail()));
    }
    private String normalized(String value) { return value == null ? "" : value.trim().toLowerCase(Locale.ROOT); }
    private ServiceException fail(String key) { return new ServiceException(MessageUtils.message(key)); }

    /** 将旧单点输入适配为完整取货站；多点请求必须逐站申报物品。 */
    private List<FlashDeliveryPickupRequest> normalizePickups(FlashDeliveryQuoteRequest request) {
        if (request.getPickups() != null) {
            if (request.getPickup() != null || request.getPackageType() != null || request.getQuantity() != null
                    || request.getWeightRange() != null || request.getSpecification() != null) {
                throw fail("flash.delivery.pickup.input.conflict");
            }
            return request.getPickups();
        }
        FlashDeliveryPickupRequest pickup = new FlashDeliveryPickupRequest();
        if (request.getPickup() == null) throw fail("flash.delivery.address.invalid");
        BeanUtils.copyProperties(request.getPickup(), pickup);
        pickup.setPackageType(request.getPackageType());
        pickup.setQuantity(request.getQuantity());
        pickup.setWeightRange(request.getWeightRange());
        pickup.setSpecification(request.getSpecification());
        return List.of(pickup);
    }

    /** 编辑提交完整站点；旧单点地址编辑保留该站原有物品信息。 */
    private List<FlashDeliveryPickupRequest> editablePickups(FlashDeliveryOrder order,
                                                           FlashDeliveryAddressChangeRequest request) {
        List<FlashDeliveryOrderStop> existing = requireStops(order);
        if (request.getPickups() != null) {
            if (request.getPickup() != null) throw fail("flash.delivery.pickup.input.conflict");
            return request.getPickups();
        }
        List<FlashDeliveryOrderStop> pickups = pickupStops(existing);
        if (pickups.size() != 1) throw fail("flash.delivery.pickups.required");
        if (request.getPickup() == null) throw fail("flash.delivery.address.invalid");
        FlashDeliveryPickupRequest pickup = new FlashDeliveryPickupRequest();
        BeanUtils.copyProperties(pickups.get(0), pickup);
        BeanUtils.copyProperties(request.getPickup(), pickup);
        return List.of(pickup);
    }

    /** 地图调用前先校验有效点数、开关及每站地址和物品。 */
    private void validatePickups(List<FlashDeliveryPickupRequest> pickups, FlashDeliveryAddressRequest delivery) {
        if (pickups == null || pickups.isEmpty() || pickups.size() > pickupStopLimit()) {
            throw fail("flash.delivery.pickup.limit.exceeded");
        }
        if (pickups.size() > 1 && !dictionaryEnabled("flash_show_multi_pickup")) {
            throw fail("flash.delivery.multi.pickup.disabled");
        }
        validateAddress(delivery);
        for (FlashDeliveryPickupRequest pickup : pickups) {
            validateAddress(pickup);
            if (!PACKAGE_TYPES.contains(Objects.toString(pickup.getPackageType(), ""))) {
                throw fail("flash.delivery.package.type.invalid");
            }
            // 重量与规格仅供骑手判断物品情况，用户可不填写；填写重量时仍须使用受支持的区间。
            if (pickup.getQuantity() == null || pickup.getQuantity() <= 0
                    || hasText(pickup.getWeightRange()) && !WEIGHT_RANGES.contains(pickup.getWeightRange())
                    || tooLong(pickup.getSpecification(), 255)) throw fail("flash.delivery.item.invalid");
            if (sameAddressText(pickup, delivery)
                    || pickup.getLatitude().compareTo(delivery.getLatitude()) == 0
                    && pickup.getLongitude().compareTo(delivery.getLongitude()) == 0) {
                throw fail("flash.delivery.address.same");
            }
        }
    }

    private RouteDistance pickupRoute(List<FlashDeliveryPickupRequest> pickups, FlashDeliveryAddressRequest delivery,
                                      Integer vehicleType) {
        List<GeoPoint> points = new ArrayList<>();
        for (FlashDeliveryPickupRequest pickup : pickups) points.add(new GeoPoint(pickup.getLatitude(), pickup.getLongitude()));
        points.add(new GeoPoint(delivery.getLatitude(), delivery.getLongitude()));
        RouteDistance route = points.size() == 2
                ? routeService.calculate(points.get(0), points.get(1), vehicleType)
                : routeService.calculate(points, vehicleType);
        if (route.distanceMeters() > MAX_DISTANCE_METERS) throw fail("flash.delivery.distance.too.far");
        return route;
    }

    private Integer requireVehicleType(Integer vehicleType) {
        if (!FlashDeliveryVehicleType.isSupported(vehicleType)) {
            throw fail("flash.delivery.vehicle.type.invalid");
        }
        return vehicleType;
    }

    /** DDL 执行前存在的旧订单按用户确认的机车规则兼容。 */
    private Integer vehicleTypeOf(FlashDeliveryOrder order) {
        return FlashDeliveryVehicleType.isSupported(order.getVehicleType())
                ? order.getVehicleType() : FlashDeliveryVehicleType.MOTORCYCLE;
    }

    /** 骑手资料复用既有 vehicleType；历史空值和非法值安全回落为机车。 */
    private Integer riderVehicleType(InfoUser rider) {
        try {
            Integer value = Integer.valueOf(rider.getVehicleType());
            return FlashDeliveryVehicleType.isSupported(value) ? value : FlashDeliveryVehicleType.MOTORCYCLE;
        } catch (Exception ignored) {
            return FlashDeliveryVehicleType.MOTORCYCLE;
        }
    }

    private boolean isRiderVehicleCompatible(InfoUser rider, FlashDeliveryOrder order) {
        return riderVehicleType(rider).equals(vehicleTypeOf(order));
    }

    /** 点数配置缺失、非整数或越界时，有效上限回退为1。 */
    private int pickupStopLimit() {
        String value = dictionaryValue("flash_pickup_stop_limit");
        if (value == null || !value.matches("[0-9]+")) return 1;
        try {
            int limit = Integer.parseInt(value);
            return limit >= 1 && limit <= 26 ? limit : 1;
        } catch (NumberFormatException ignored) { return 1; }
    }

    private boolean dictionaryEnabled(String key) { return "1".equals(dictionaryValue(key)); }

    private String dictionaryValue(String key) {
        try {
            List<SysDictData> values = DictUtils.getDictCache(key);
            return values == null || values.isEmpty() ? null : values.get(0).getDictValue();
        } catch (Exception ignored) { return null; }
    }

    /** 订单旧字段仅维护首站兼容摘要，不代表全部站点物品。 */
    private void copyPickupSummary(FlashDeliveryOrder order, List<FlashDeliveryPickupRequest> pickups) {
        FlashDeliveryPickupRequest first = pickups.get(0);
        copyAddress(first, order, true);
        order.setPackageType(first.getPackageType()); order.setQuantity(first.getQuantity());
        order.setWeightRange(first.getWeightRange()); order.setSpecification(trimToNull(first.getSpecification()));
        order.setPickupStopCount(pickups.size());
    }

    /** 调用方已创建订单或持有订单行锁，全部站点与订单在同一事务保存。 */
    private void saveStops(FlashDeliveryOrder order, List<FlashDeliveryPickupRequest> pickups,
                           FlashDeliveryAddressRequest delivery, Date now) {
        for (int i = 0; i < pickups.size(); i++) insertStop(order.getId(), pickups.get(i), "PICKUP", i, now);
        insertStop(order.getId(), delivery, "DELIVERY", pickups.size(), now);
    }

    private void insertStop(Long orderId, FlashDeliveryAddressRequest address, String type, int index, Date now) {
        FlashDeliveryOrderStop stop = new FlashDeliveryOrderStop();
        BeanUtils.copyProperties(address, stop);
        stop.setName(address.getName().trim()); stop.setPhone(address.getPhone().trim());
        stop.setAddress(address.getAddress().trim()); stop.setAddressDetail(trimToNull(address.getAddressDetail()));
        stop.setCity(trimToNull(address.getCity())); stop.setArea(trimToNull(address.getArea()));
        stop.setHandoffMethod(trimToNull(address.getHandoffMethod())); stop.setSpecification(trimToNull(stop.getSpecification()));
        stop.setOrderId(orderId); stop.setStopType(type); stop.setStopOrder(index);
        stop.setStatus("PENDING"); stop.setCreateTime(now);
        if (stopMapper.insert(stop) != 1) throw fail("flash.delivery.state.changed");
    }

    /** 事务内使用当前读，避免骑手资料查询建立的旧快照遮蔽锁等待期间的履约变化；GET 不加锁。 */
    private <T> QueryWrapper<T> currentRead(QueryWrapper<T> query) {
        if (TransactionSynchronizationManager.isActualTransactionActive()) {
            query.last("FOR UPDATE");
        }
        return query;
    }

    private List<FlashDeliveryOrderStop> stops(Long orderId) {
        return stopMapper.selectList(currentRead(new QueryWrapper<FlashDeliveryOrderStop>()
                .eq("order_id", orderId).orderByAsc("stop_order", "id")));
    }

    /** 履约必须有真实站点记录，不从旧测试订单的摘要字段合成站点。 */
    private List<FlashDeliveryOrderStop> requireStops(FlashDeliveryOrder order) {
        List<FlashDeliveryOrderStop> rows = stops(order.getId());
        if (rows == null || pickupStops(rows).isEmpty()
                || !Objects.equals(order.getPickupStopCount(), pickupStops(rows).size())
                || rows.stream().filter(s -> "DELIVERY".equals(s.getStopType())).count() != 1) {
            throw fail("flash.delivery.stops.invalid");
        }
        return rows;
    }

    private List<FlashDeliveryOrderStop> pickupStops(List<FlashDeliveryOrderStop> rows) {
        return rows.stream().filter(s -> "PICKUP".equals(s.getStopType())).toList();
    }

    private boolean anyPicked(List<FlashDeliveryOrderStop> rows) {
        return rows.stream().anyMatch(s -> "PICKUP".equals(s.getStopType()) && "PICKED_UP".equals(s.getStatus()));
    }

    private boolean allPicked(List<FlashDeliveryOrderStop> rows) {
        List<FlashDeliveryOrderStop> pickups = pickupStops(rows);
        return !pickups.isEmpty() && pickups.stream().allMatch(s -> "PICKED_UP".equals(s.getStatus()));
    }

    /** 选择的目标在刷新后保留；该站取货后回到原顺序最早的待取站点。 */
    private Long targetStopId(FlashDeliveryOrder order, List<FlashDeliveryOrderStop> rows) {
        if (CANCELLED.equals(order.getStatus()) || COMPLETED.equals(order.getStatus()) || DELIVERED.equals(order.getStatus())) return null;
        if (order.getCurrentTargetStopId() != null && rows.stream().anyMatch(s ->
                Objects.equals(s.getId(), order.getCurrentTargetStopId()) && "PICKUP".equals(s.getStopType()) && "PENDING".equals(s.getStatus()))) {
            return order.getCurrentTargetStopId();
        }
        return rows.stream().filter(s -> "PICKUP".equals(s.getStopType()) && "PENDING".equals(s.getStatus()))
                .map(FlashDeliveryOrderStop::getId).findFirst().orElseGet(() -> rows.stream()
                        .filter(s -> "DELIVERY".equals(s.getStopType())).map(FlashDeliveryOrderStop::getId).findFirst().orElse(null));
    }

    /** 事务内先锁订单并读取最新状态，再查询站点，统一取货、调整与取消的并发边界。 */
    private FlashDeliveryOrder lockOrder(Long orderId) {
        FlashDeliveryOrder order = orderId == null ? null : orderMapper.selectByIdForUpdate(orderId);
        if (order == null) throw fail("flash.delivery.order.not.found");
        return order;
    }

    private FlashDeliveryOrderStop requireStop(List<FlashDeliveryOrderStop> rows, Long stopId) {
        return rows.stream().filter(s -> Objects.equals(s.getId(), stopId)).findFirst()
                .orElseThrow(() -> fail("flash.delivery.stop.invalid"));
    }

    /** 选择前往目标只记录履约调整，不修改取件进度、金额或用户站点顺序。 */
    @Transactional
    public FlashDeliveryOrderDetailView selectTarget(Long riderId, Long orderId, Long stopId,
                                                     FlashDeliveryTargetRequest request) {
        requireRider(riderId);
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!Objects.equals(riderId, order.getRiderId())) throw fail("flash.delivery.order.not.found");
        if (request == null || !hasText(request.getClientRequestId()) || tooLong(request.getClientRequestId(), 64)) {
            throw fail("flash.delivery.client.request.id.invalid");
        }
        String requestId = request.getClientRequestId().trim();
        FlashDeliveryTargetAdjustment previous = adjustmentMapper.selectOne(new QueryWrapper<FlashDeliveryTargetAdjustment>()
                .eq("order_id", orderId).eq("rider_id", riderId).eq("client_request_id", requestId).last("FOR UPDATE"));
        if (previous != null) {
            if (!Objects.equals(previous.getToStopId(), stopId)
                    || !Objects.equals(previous.getOrderVersion(), request.getOrderVersion())
                    || !Objects.equals(previous.getReason(), trimToNull(request.getReason()))
                    || !Objects.equals(previous.getConsentDeclared(), Boolean.TRUE.equals(request.getConsentDeclared()))) {
                throw fail("flash.delivery.target.request.conflict");
            }
            // 重试返回当前进度，不把已过期的历史目标重新写回订单。
            return participantDetail(order, false, false);
        }
        if (!ACCEPTED.equals(order.getStatus())) throw fail("flash.delivery.transition.not.allowed");
        if (request.getOrderVersion() == null || !Objects.equals(request.getOrderVersion(), order.getVersion())) {
            throw fail("flash.delivery.state.changed");
        }
        List<FlashDeliveryOrderStop> rows = requireStops(order);
        FlashDeliveryOrderStop target = requireStop(rows, stopId);
        if (!"PICKUP".equals(target.getStopType()) || !"PENDING".equals(target.getStatus())) throw fail("flash.delivery.stop.invalid");
        Long before = targetStopId(order, rows);
        if (!Objects.equals(before, stopId) && (!hasText(request.getReason()) || tooLong(request.getReason(), 500)
                || !Boolean.TRUE.equals(request.getConsentDeclared()))) throw fail("flash.delivery.target.consent.required");
        if (tooLong(request.getReason(), 500)) throw fail("flash.delivery.target.consent.required");
        Date now = new Date();
        FlashDeliveryTargetAdjustment adjustment = new FlashDeliveryTargetAdjustment();
        adjustment.setOrderId(orderId); adjustment.setFromStopId(before); adjustment.setToStopId(stopId);
        adjustment.setRiderId(riderId); adjustment.setClientRequestId(requestId); adjustment.setOrderVersion(request.getOrderVersion());
        adjustment.setReason(trimToNull(request.getReason())); adjustment.setConsentDeclared(Boolean.TRUE.equals(request.getConsentDeclared())); adjustment.setCreateTime(now);
        if (adjustmentMapper.insert(adjustment) != 1) throw fail("flash.delivery.state.changed");
        order.setCurrentTargetStopId(stopId); order.setUpdateTime(now);
        if (orderMapper.updateFulfilment(order) != 1) throw fail("flash.delivery.state.changed");
        order.setVersion(order.getVersion() + 1);
        return participantDetail(order, false, false);
    }

    /** 两种取货接口共用同一加锁流程，路径与请求体中的站点编号必须一致。 */
    @Transactional
    public void pickupAtStop(Long riderId, Long orderId, Long stopId, FlashDeliveryProofRequest request) {
        if (request == null) throw fail("flash.delivery.request.required");
        if (request.getStopId() != null && !Objects.equals(request.getStopId(), stopId)) throw fail("flash.delivery.stop.invalid");
        pickupStation(riderId, orderId, stopId, request);
    }

    private void pickupStation(Long riderId, Long orderId, Long requestedStopId, FlashDeliveryProofRequest request) {
        requireRider(riderId);
        FlashDeliveryOrder order = lockOrder(orderId);
        if (!Objects.equals(riderId, order.getRiderId())) throw fail("flash.delivery.order.not.found");
        List<FlashDeliveryOrderStop> rows = requireStops(order);
        List<FlashDeliveryOrderStop> pickups = pickupStops(rows);
        Long stopId = requestedStopId;
        if (stopId == null) {
            if (pickups.size() != 1) throw fail("flash.delivery.stop.id.required");
            stopId = pickups.get(0).getId();
        }
        FlashDeliveryOrderStop stop = requireStop(rows, stopId);
        if (!"PICKUP".equals(stop.getStopType())) throw fail("flash.delivery.stop.invalid");
        // 已确认站点的重试直接成功，不因当前目标或主状态已变化而重复写凭证。
        if ("PICKED_UP".equals(stop.getStatus())) return;
        if (!ACCEPTED.equals(order.getStatus())) throw fail("flash.delivery.transition.not.allowed");
        if (!Objects.equals(stopId, targetStopId(order, rows))) throw fail("flash.delivery.target.mismatch");
        List<String> urls = validateProofUrls(request == null ? null : request.getImageUrls(), true);
        Date now = new Date();
        stop.setStatus("PICKED_UP"); stop.setPickedUpAt(now);
        if (stopMapper.updateById(stop) != 1) throw fail("flash.delivery.state.changed");
        saveStationImages(orderId, stopId, "PICKUP", "RIDER", riderId, urls, now);
        order.setPickedUpStopCount((int) pickups.stream().filter(s -> "PICKED_UP".equals(s.getStatus())).count());
        order.setCurrentTargetStopId(null); order.setUpdateTime(now);
        if (allPicked(rows)) { order.setStatus(PICKED_UP); order.setPickedUpAt(now); }
        if (orderMapper.updateFulfilment(order) != 1) throw fail("flash.delivery.state.changed");
        writeLog(orderId, ACCEPTED, order.getStatus(), "RIDER", riderId, "PICKUP_STOP:" + stopId, now);
    }

    private void saveStationImages(Long orderId, Long stopId, String proofType, String operatorType,
                                   Long operatorId, List<String> urls, Date now) {
        for (int index = 0; index < urls.size(); index++) {
            FlashDeliveryOrderImage image = new FlashDeliveryOrderImage();
            image.setOrderId(orderId); image.setStopId(stopId); image.setProofType(proofType);
            image.setOperatorType(operatorType); image.setOperatorId(operatorId); image.setImageUrl(urls.get(index));
            image.setSortOrder(index); image.setCreateTime(now);
            if (imageMapper.insert(image) != 1) throw fail("flash.delivery.state.changed");
        }
    }

    private List<FlashDeliveryStopView> stopViews(List<FlashDeliveryOrderStop> rows, boolean sensitive,
                                                 List<FlashDeliveryOrderImage> images) {
        return rows.stream().map(stop -> {
            FlashDeliveryStopView view = new FlashDeliveryStopView();
            BeanUtils.copyProperties(stop, view);
            if (sensitive) view.setImageUrls(images.stream().filter(i -> Objects.equals(i.getStopId(), stop.getId())
                            && Objects.equals(i.getProofType(), stop.getStopType()))
                    .map(FlashDeliveryOrderImage::getImageUrl).toList());
            else { view.setName(null); view.setPhone(null); view.setLongitude(null); view.setLatitude(null); }
            return view;
        }).toList();
    }

    private boolean canUserCancel(FlashDeliveryOrder order) {
        return FlashDeliveryStateMachine.canUserCancel(order.getStatus())
                && Integer.valueOf(0).equals(order.getPickedUpStopCount());
    }


    /** 报价中间结果：命中的运价配置、路线距离和费用明细。 */
    private record QuoteContext(FlashDeliveryPricing pricing, RouteDistance route,
                                FlashDeliveryPriceBreakdown breakdown, List<FlashDeliveryPickupRequest> pickups) { }
}