import { BadRequestException, Injectable, NotFoundException } from '@nestjs/common';
import { Prisma } from '@prisma/client';
import {
  DEFAULT_STORE_WITHDRAW_DAILY_LIMIT,
  DEFAULT_XFX_LOGISTICS_PRICING,
  WINERY_SETTLEMENT_LAG_DAYS,
  WINERY_SETTLEMENT_RATE,
} from '@dukang/shared-types';
import {
  calcLogisticsFeeByBottles,
  pickPayoutsForWithdrawAmount,
  sumUnbilledPayoutAmount,
  validateStoreWithdraw,
  type LogisticsPricingRule,
} from '@dukang/domain';
import { PrismaService } from '../../common/prisma/prisma.module';
import { serializeBigInt } from '../../common/decorators/current-user.decorator';
import { AlertService } from '../../common/alert/alert.service';
import { AnalyticsService } from '../analytics/analytics.service';
import { PartnerCityService } from '../city-scope/partner-city.service';
import { FulfillmentProviderService } from '../fulfillment/fulfillment-provider.service';

function generateBillNo(prefix: string) {
  return `${prefix}${Date.now()}${Math.floor(Math.random() * 900 + 100)}`;
}

function csvEscape(value: string) {
  if (/[",\n\r]/.test(value)) return `"${value.replace(/"/g, '""')}"`;
  return value;
}

/** 上海时区自然日 00:00（用本地 Date 构造；服务器需设 Asia/Shanghai 或等价） */
function startOfDay(d: Date) {
  return new Date(d.getFullYear(), d.getMonth(), d.getDate(), 0, 0, 0, 0);
}

function dayWindow(anchor = new Date()) {
  const end = startOfDay(anchor);
  const start = new Date(end);
  start.setDate(start.getDate() - 1);
  return { start, end, billDate: start };
}

function wineryDayWindow(anchor = new Date(), lagDays = WINERY_SETTLEMENT_LAG_DAYS) {
  const billDate = startOfDay(anchor);
  billDate.setDate(billDate.getDate() - lagDays);
  const start = billDate;
  const end = new Date(start);
  end.setDate(end.getDate() + 1);
  return { start, end, billDate: start };
}

function round2(n: number) {
  return Math.round(n * 100) / 100;
}

function getStoreWithdrawDailyLimit(): number {
  const raw = process.env.STORE_WITHDRAW_DAILY_LIMIT;
  const n = raw != null && raw !== '' ? Number(raw) : DEFAULT_STORE_WITHDRAW_DAILY_LIMIT;
  return Number.isFinite(n) && n > 0 ? n : DEFAULT_STORE_WITHDRAW_DAILY_LIMIT;
}

/** 工作日 18:00 前未审完视为 FIN-003 超时（Asia/Shanghai 自然日） */
function isWithdrawOverdue(appliedAt: Date, now = new Date()): boolean {
  const day = appliedAt.getDay(); // 0 Sun … 6 Sat
  if (day === 0 || day === 6) return false;
  const deadline = new Date(
    appliedAt.getFullYear(),
    appliedAt.getMonth(),
    appliedAt.getDate(),
    18,
    0,
    0,
    0,
  );
  return now.getTime() > deadline.getTime();
}

@Injectable()
export class SettlementService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly analyticsService: AnalyticsService,
    private readonly partnerCityService: PartnerCityService,
    private readonly fulfillmentProviderService: FulfillmentProviderService,
    private readonly alert: AlertService,
  ) {}

  // ─── Store payout (line) ─────────────────────────────

  async createStorePayout(
    redeemRecordId: bigint,
    storeId: bigint,
    redeemAmount: number,
    payoutAmount: number,
    settlementRate: number,
    tx?: Prisma.TransactionClient,
  ) {
    const expectedPayAt = new Date();
    expectedPayAt.setDate(expectedPayAt.getDate() + 1);
    const client = tx ?? this.prisma;
    const payout = await client.storePayout.create({
      data: {
        redeemRecordId,
        storeId,
        redeemAmount,
        payoutAmount,
        settlementRate,
        status: 'PENDING',
        expectedPayAt,
      },
    });
    this.analyticsService.trackStoreOneSafe(undefined, 'SHOP_H5', {
      storeId,
      eventName: 'store_payout_created',
      refType: 'STORE_PAYOUT',
      refId: payout.id,
      extraJson: {
        redeemRecordId: redeemRecordId.toString(),
        payoutAmount,
        redeemAmount,
        settlementRate,
      },
    });
    return serializeBigInt(payout);
  }

  async listShopPayouts(storeAccountId: bigint, storeId: bigint, page = 1, pageSize = 20) {
    await this.prisma.storeAccountStore.findUniqueOrThrow({
      where: { storeAccountId_storeId: { storeAccountId, storeId } },
    });
    const where = { storeId };
    const [items, total] = await Promise.all([
      this.prisma.storePayout.findMany({
        where,
        orderBy: { createdAt: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: { redeemRecord: { select: { redeemNo: true, amount: true } } },
      }),
      this.prisma.storePayout.count({ where }),
    ]);
    return serializeBigInt({ items, total, page, pageSize });
  }

  // ─── Store withdraw (未出账手动提现) ─────────────────

  private async assertShopStoreAccess(storeAccountId: bigint, storeId: bigint) {
    await this.prisma.storeAccountStore.findUniqueOrThrow({
      where: { storeAccountId_storeId: { storeAccountId, storeId } },
    });
  }

  private async listAvailableUnbilledPayouts(storeId: bigint) {
    return this.prisma.storePayout.findMany({
      where: {
        storeId,
        status: 'PENDING',
        storeBillId: null,
        withdrawItem: null,
      },
      orderBy: [{ createdAt: 'asc' }, { id: 'asc' }],
    });
  }

  private async todayWithdrawAppliedAmount(storeId: bigint, now = new Date()) {
    const start = startOfDay(now);
    const end = new Date(start);
    end.setDate(end.getDate() + 1);
    const agg = await this.prisma.storeWithdrawRequest.aggregate({
      where: {
        storeId,
        status: { in: ['PENDING_REVIEW', 'PAID'] },
        appliedAt: { gte: start, lt: end },
      },
      _sum: { amount: true },
    });
    return Number(agg._sum.amount ?? 0);
  }

  async getShopWithdrawSummary(storeAccountId: bigint, storeId: bigint) {
    await this.assertShopStoreAccess(storeAccountId, storeId);
    const [account, available, pending, todayApplied] = await Promise.all([
      this.prisma.storeAccount.findUniqueOrThrow({
        where: { id: storeAccountId },
        select: {
          isPrimary: true,
          bankAccountName: true,
          bankAccountNo: true,
          bankBranch: true,
        },
      }),
      this.listAvailableUnbilledPayouts(storeId),
      this.prisma.storeWithdrawRequest.findFirst({
        where: { storeId, status: 'PENDING_REVIEW' },
        select: { id: true, amount: true },
      }),
      this.todayWithdrawAppliedAmount(storeId),
    ]);

    const availableAmount = sumUnbilledPayoutAmount(
      available.map((p) => ({ payoutAmount: Number(p.payoutAmount) })),
    );
    const dailyLimit = getStoreWithdrawDailyLimit();
    const hasBankAccount = !!(
      account.bankAccountName?.trim() &&
      account.bankAccountNo?.trim()
    );

    return {
      availableAmount,
      pendingReviewAmount: pending ? Number(pending.amount) : 0,
      todayAppliedAmount: todayApplied,
      dailyLimit,
      remainingDailyLimit: Math.max(0, round2(dailyLimit - todayApplied)),
      isPrimary: account.isPrimary === 1,
      hasBankAccount,
      bankAccount: {
        bankAccountName: account.bankAccountName,
        bankAccountNo: account.bankAccountNo,
        bankBranch: account.bankBranch,
      },
    };
  }

  async createStoreWithdrawRequest(
    storeAccountId: bigint,
    storeId: bigint,
    dto?: { amount?: number },
  ) {
    await this.assertShopStoreAccess(storeAccountId, storeId);

    const [store, account, available, pending, todayApplied] = await Promise.all([
      this.prisma.store.findUniqueOrThrow({
        where: { id: storeId },
        select: { id: true, name: true, phone: true, cityName: true },
      }),
      this.prisma.storeAccount.findUniqueOrThrow({
        where: { id: storeAccountId },
        select: {
          isPrimary: true,
          bankAccountName: true,
          bankAccountNo: true,
        },
      }),
      this.listAvailableUnbilledPayouts(storeId),
      this.prisma.storeWithdrawRequest.findFirst({
        where: { storeId, status: 'PENDING_REVIEW' },
        select: { id: true },
      }),
      this.todayWithdrawAppliedAmount(storeId),
    ]);

    if (account.isPrimary !== 1) {
      throw new BadRequestException('仅门店主账号可申请提现');
    }

    const availableAmount = sumUnbilledPayoutAmount(
      available.map((p) => ({ payoutAmount: Number(p.payoutAmount) })),
    );
    const dailyLimit = getStoreWithdrawDailyLimit();
    const hasBankAccount = !!(
      account.bankAccountName?.trim() &&
      account.bankAccountNo?.trim()
    );
    const requestAmount =
      dto?.amount != null && Number.isFinite(Number(dto.amount))
        ? round2(Number(dto.amount))
        : availableAmount;

    const guard = validateStoreWithdraw({
      availableAmount,
      requestAmount,
      todayApplied,
      dailyLimit,
      hasBankAccount,
    });
    if (!guard.ok) throw new BadRequestException(guard.message);

    const picked = pickPayoutsForWithdrawAmount(
      available.map((p) => ({ id: p.id, payoutAmount: Number(p.payoutAmount) })),
      requestAmount,
    );
    if (!picked.ok) throw new BadRequestException(picked.message);

    const created = await this.prisma.$transaction(async (tx) => {
      const payoutIds = picked.selected.map((p) => p.id);
      const locked = await tx.storePayout.findMany({
        where: {
          id: { in: payoutIds },
          storeId,
          status: 'PENDING',
          storeBillId: null,
          withdrawItem: null,
        },
        select: { id: true, payoutAmount: true },
      });
      if (locked.length !== payoutIds.length) {
        throw new BadRequestException('可提余额已变化，请刷新后重试');
      }
      const amount = round2(locked.reduce((s, p) => s + Number(p.payoutAmount), 0));

      const req = await tx.storeWithdrawRequest.create({
        data: {
          withdrawNo: generateBillNo('SW'),
          storeId,
          storeAccountId,
          amount,
          payoutCount: locked.length,
          status: 'PENDING_REVIEW',
        },
      });
      await tx.storeWithdrawPayoutItem.createMany({
        data: locked.map((p) => ({
          withdrawRequestId: req.id,
          storePayoutId: p.id,
        })),
      });
      return req;
    });

    this.analyticsService.trackStoreOneSafe(storeAccountId, 'SHOP_H5', {
      storeId,
      eventName: 'store_withdraw_applied',
      refType: 'STORE_WITHDRAW',
      refId: created.id,
      extraJson: {
        amount: Number(created.amount),
        payoutCount: created.payoutCount,
      },
    });

    this.alert.notify({
      level: 'P1',
      category: 'finance',
      title: '门店提现待审',
      detail: [
        `门店：${store.name}（${store.cityName || '-'} / ${store.phone || '-'}）`,
        `单号：${created.withdrawNo}`,
        `金额：¥${Number(created.amount).toFixed(2)}`,
        `明细：${created.payoutCount} 笔未出账核销（已锁定，不进入次日 T+1 出账）`,
        '请尽快在 HQ「财务 → 门店账单（手动提现）」处理。',
      ].join('\n'),
      dedupeKey: `store_withdraw_applied|${created.id.toString()}`,
      dedupeTtlSec: 3600,
    });

    return serializeBigInt(created);
  }

  async listShopWithdrawRequests(
    storeAccountId: bigint,
    storeId: bigint,
    query: { page?: number; pageSize?: number; status?: string },
  ) {
    await this.assertShopStoreAccess(storeAccountId, storeId);
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where: Prisma.StoreWithdrawRequestWhereInput = { storeId };
    if (query.status) {
      where.status = query.status as 'PENDING_REVIEW' | 'REJECTED' | 'PAID';
    }
    const [items, total] = await Promise.all([
      this.prisma.storeWithdrawRequest.findMany({
        where,
        orderBy: { appliedAt: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
      }),
      this.prisma.storeWithdrawRequest.count({ where }),
    ]);
    return serializeBigInt({ items, total, page, pageSize });
  }

  async listAdminStoreWithdrawals(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where: Prisma.StoreWithdrawRequestWhereInput = {};
    if (query.status) {
      where.status = query.status as 'PENDING_REVIEW' | 'REJECTED' | 'PAID';
    }
    if (query.storeId) where.storeId = BigInt(query.storeId);
    if (query.dateFrom || query.dateTo) {
      where.appliedAt = {};
      if (query.dateFrom) where.appliedAt.gte = new Date(query.dateFrom);
      if (query.dateTo) {
        const end = new Date(query.dateTo);
        end.setHours(23, 59, 59, 999);
        where.appliedAt.lte = end;
      }
    }

    const [items, total, aggregates] = await Promise.all([
      this.prisma.storeWithdrawRequest.findMany({
        where,
        orderBy: [{ appliedAt: 'desc' }, { id: 'desc' }],
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: {
          store: { select: { id: true, name: true, cityName: true, phone: true } },
        },
      }),
      this.prisma.storeWithdrawRequest.count({ where }),
      this.prisma.storeWithdrawRequest.aggregate({
        where,
        _sum: { amount: true },
        _count: true,
      }),
    ]);

    const now = new Date();
    const mapped = items.map((row) => ({
      ...row,
      overdue:
        row.status === 'PENDING_REVIEW' ? isWithdrawOverdue(row.appliedAt, now) : false,
    }));

    return serializeBigInt({
      items: mapped,
      total,
      page,
      pageSize,
      summary: {
        count: aggregates._count,
        totalAmount: Number(aggregates._sum.amount ?? 0),
      },
    });
  }

  async getAdminStoreWithdrawal(id: bigint) {
    const row = await this.prisma.storeWithdrawRequest.findUnique({
      where: { id },
      include: {
        store: {
          select: {
            id: true,
            name: true,
            cityName: true,
            phone: true,
          },
        },
        storeAccount: {
          select: {
            id: true,
            name: true,
            phone: true,
            bankAccountName: true,
            bankAccountNo: true,
            bankBranch: true,
          },
        },
        items: {
          include: {
            storePayout: {
              include: {
                redeemRecord: { select: { redeemNo: true, amount: true, createdAt: true } },
              },
            },
          },
        },
      },
    });
    if (!row) throw new NotFoundException('提现申请不存在');
    return serializeBigInt({
      ...row,
      overdue:
        row.status === 'PENDING_REVIEW' ? isWithdrawOverdue(row.appliedAt) : false,
    });
  }

  async approveStoreWithdraw(
    id: bigint,
    hqAccountId: bigint,
    dto?: { paymentRef?: string },
  ) {
    const row = await this.prisma.storeWithdrawRequest.findUnique({
      where: { id },
      include: { items: { select: { storePayoutId: true } } },
    });
    if (!row) throw new NotFoundException('提现申请不存在');
    if (row.status !== 'PENDING_REVIEW') {
      throw new BadRequestException('仅待审核提现可审核通过');
    }

    const paidAt = new Date();
    const updated = await this.prisma.$transaction(async (tx) => {
      const req = await tx.storeWithdrawRequest.update({
        where: { id },
        data: {
          status: 'PAID',
          reviewedAt: paidAt,
          reviewedByHqId: hqAccountId,
          paidAt,
          paymentRef: dto?.paymentRef?.trim() || null,
        },
      });
      await tx.storePayout.updateMany({
        where: {
          id: { in: row.items.map((i) => i.storePayoutId) },
          status: 'PENDING',
        },
        data: { status: 'PAID', paidAt },
      });
      return req;
    });

    this.analyticsService.trackStoreOneSafe(undefined, 'HQ_WEB', {
      storeId: row.storeId,
      eventName: 'store_withdraw_paid',
      refType: 'STORE_WITHDRAW',
      refId: id,
      extraJson: {
        amount: Number(row.amount),
        paymentRef: dto?.paymentRef,
      },
    });

    return serializeBigInt(updated);
  }

  async rejectStoreWithdraw(id: bigint, hqAccountId: bigint, reason: string) {
    const row = await this.prisma.storeWithdrawRequest.findUnique({
      where: { id },
    });
    if (!row) throw new NotFoundException('提现申请不存在');
    if (row.status !== 'PENDING_REVIEW') {
      throw new BadRequestException('仅待审核提现可驳回');
    }
    const rejectReason = reason.trim();
    if (!rejectReason) throw new BadRequestException('请填写驳回理由');

    const updated = await this.prisma.$transaction(async (tx) => {
      const req = await tx.storeWithdrawRequest.update({
        where: { id },
        data: {
          status: 'REJECTED',
          rejectReason,
          reviewedAt: new Date(),
          reviewedByHqId: hqAccountId,
        },
      });
      // 释放 payout 锁定，允许再次提现
      await tx.storeWithdrawPayoutItem.deleteMany({ where: { withdrawRequestId: id } });
      return req;
    });

    return serializeBigInt(updated);
  }

  async getStoreWithdrawOverdueSummary() {
    const pending = await this.prisma.storeWithdrawRequest.findMany({
      where: { status: 'PENDING_REVIEW' },
      select: { id: true, appliedAt: true, amount: true },
    });
    const now = new Date();
    const overdue = pending.filter((r) => isWithdrawOverdue(r.appliedAt, now));
    return {
      pendingCount: pending.length,
      overdueCount: overdue.length,
      overdueAmount: round2(overdue.reduce((s, r) => s + Number(r.amount), 0)),
      pendingAmount: round2(pending.reduce((s, r) => s + Number(r.amount), 0)),
    };
  }

  /** FIN-003：工作日 18:00 扫描超时未审提现 */
  async scanOverdueStoreWithdrawals() {
    const summary = await this.getStoreWithdrawOverdueSummary();
    if (summary.overdueCount > 0) {
      const overdueRows = await this.prisma.storeWithdrawRequest.findMany({
        where: { status: 'PENDING_REVIEW' },
        include: { store: { select: { name: true, phone: true } } },
        orderBy: { appliedAt: 'asc' },
        take: 20,
      });
      const now = new Date();
      const lines = overdueRows
        .filter((r) => isWithdrawOverdue(r.appliedAt, now))
        .slice(0, 10)
        .map(
          (r) =>
            `- ${r.store?.name || r.storeId} ${r.withdrawNo} ¥${Number(r.amount).toFixed(2)}`,
        );
      this.alert.notify({
        level: 'P1',
        category: 'finance',
        title: '门店提现超时未审',
        detail: [
          `待审 ${summary.pendingCount} 笔，超时 ${summary.overdueCount} 笔，超时金额 ¥${summary.overdueAmount.toFixed(2)}`,
          ...lines,
          '请尽快在 HQ「财务 → 门店账单（手动提现）」处理。',
        ].join('\n'),
        dedupeKey: `store_withdraw_overdue|${new Date().toISOString().slice(0, 10)}`,
        dedupeTtlSec: 6 * 3600,
      });
    }
    return summary;
  }

  async listAdminStorePayouts(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where = this.buildStorePayoutWhere(query);

    const [items, total, aggregates] = await Promise.all([
      this.prisma.storePayout.findMany({
        where,
        orderBy: [{ createdAt: 'desc' }, { expectedPayAt: 'asc' }],
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: {
          store: { select: { id: true, name: true, cityName: true, phone: true } },
          redeemRecord: { select: { redeemNo: true, amount: true, userId: true, createdAt: true } },
        },
      }),
      this.prisma.storePayout.count({ where }),
      this.prisma.storePayout.aggregate({
        where,
        _sum: { redeemAmount: true, payoutAmount: true },
        _count: true,
      }),
    ]);

    const summary = {
      count: aggregates._count,
      redeemAmount: Number(aggregates._sum.redeemAmount ?? 0),
      payoutAmount: Number(aggregates._sum.payoutAmount ?? 0),
      totalAmount: Number(aggregates._sum.payoutAmount ?? 0),
    };

    return serializeBigInt({ items, total, page, pageSize, summary });
  }

  async getAdminStorePayout(id: bigint) {
    const payout = await this.prisma.storePayout.findUnique({
      where: { id },
      include: {
        store: true,
        redeemRecord: true,
      },
    });
    if (!payout) throw new NotFoundException('打款记录不存在');
    return serializeBigInt(payout);
  }

  async confirmStorePayout(id: bigint, dto: { paymentRef?: string; batchNo?: string; remark?: string }) {
    const payout = await this.prisma.storePayout.findUnique({ where: { id } });
    if (!payout) throw new NotFoundException('打款记录不存在');
    if (payout.status !== 'PENDING') throw new BadRequestException('仅未打款记录可确认');

    const updated = await this.prisma.storePayout.update({
      where: { id },
      data: {
        status: 'PAID',
        paidAt: new Date(),
        batchNo: dto.batchNo ?? payout.batchNo,
      },
    });

    if (payout.storeBillId) {
      const pending = await this.prisma.storePayout.count({
        where: { storeBillId: payout.storeBillId, status: 'PENDING' },
      });
      if (pending === 0) {
        await this.prisma.storeBill.update({
          where: { id: payout.storeBillId },
          data: { status: 'PAID', paidAt: new Date() },
        });
      }
    }

    this.analyticsService.trackStoreOneSafe(undefined, 'HQ_WEB', {
      storeId: payout.storeId,
      eventName: 'store_payout_paid',
      refType: 'STORE_PAYOUT',
      refId: id,
      extraJson: {
        batchNo: dto.batchNo ?? payout.batchNo,
        paymentRef: dto.paymentRef,
        payoutAmount: Number(payout.payoutAmount),
      },
    });

    return serializeBigInt(updated);
  }

  async batchConfirmStorePayouts(ids: string[], dto: { batchNo?: string }) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.confirmStorePayout(BigInt(id), { batchNo: dto.batchNo });
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async exportAdminStorePayouts(query: {
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const where = this.buildStorePayoutWhere(query);
    const items = await this.prisma.storePayout.findMany({
      where,
      include: {
        store: { select: { name: true, phone: true, cityName: true } },
        redeemRecord: { select: { redeemNo: true, createdAt: true } },
      },
      orderBy: { createdAt: 'desc' },
    });
    const header = ['核销单号', '门店', '城市', '核销金额', '结算比例', '应付金额', '状态', '核销时间', '打款时间'].join(',');
    const rows = items.map((p) =>
      [
        csvEscape(p.redeemRecord.redeemNo ?? ''),
        csvEscape(p.store.name),
        csvEscape(p.store.cityName ?? ''),
        Number(p.redeemAmount),
        Number(p.settlementRate),
        Number(p.payoutAmount),
        p.status,
        p.redeemRecord.createdAt.toISOString().slice(0, 19).replace('T', ' '),
        p.paidAt ? p.paidAt.toISOString().slice(0, 19).replace('T', ' ') : '',
      ].join(','),
    );
    return { csv: `\uFEFF${[header, ...rows].join('\n')}`, count: items.length };
  }

  async scanDueStorePayouts() {
    const now = new Date();
    const due = await this.prisma.storePayout.findMany({
      where: { status: 'PENDING', expectedPayAt: { lte: now } },
      take: 100,
    });
    return serializeBigInt({ dueCount: due.length, items: due });
  }

  private buildStorePayoutWhere(query: {
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }): Prisma.StorePayoutWhereInput {
    const where: Prisma.StorePayoutWhereInput = {};
    if (query.status === 'PENDING' || query.status === 'PAID') where.status = query.status;
    if (query.storeId) where.storeId = BigInt(query.storeId);
    if (query.dateFrom || query.dateTo) {
      where.createdAt = {};
      if (query.dateFrom) where.createdAt.gte = new Date(query.dateFrom);
      if (query.dateTo) {
        const end = new Date(query.dateTo);
        end.setHours(23, 59, 59, 999);
        where.createdAt.lte = end;
      }
    }
    return where;
  }

  // ─── Store bills (daily header) ──────────────────────

  /** 生成指定自然日窗口内的门店对账单（默认昨日） */
  async generateStoreBillsForDay(anchor = new Date()) {
    const { start, end, billDate } = dayWindow(anchor);
    const payouts = await this.prisma.storePayout.findMany({
      where: {
        storeBillId: null,
        createdAt: { gte: start, lt: end },
        // 排除已锁定在待审提现单中的明细，避免出账与提现双占
        withdrawItem: null,
        status: 'PENDING',
      },
      include: { store: { select: { id: true, settlementRate: true } } },
    });

    const byStore = new Map<string, typeof payouts>();
    for (const p of payouts) {
      const key = p.storeId.toString();
      const list = byStore.get(key) ?? [];
      list.push(p);
      byStore.set(key, list);
    }

    let created = 0;
    let skipped = 0;
    for (const [storeIdStr, list] of byStore) {
      const storeId = BigInt(storeIdStr);
      const existing = await this.prisma.storeBill.findUnique({
        where: { storeId_billDate: { storeId, billDate } },
      });
      if (existing) {
        if (existing.status === 'PAID') {
          skipped += 1;
          continue;
        }
        const redeemAmount = round2(list.reduce((s, p) => s + Number(p.redeemAmount), 0));
        const payoutAmount = round2(list.reduce((s, p) => s + Number(p.payoutAmount), 0));
        const rate = Number(list[0].settlementRate);
        await this.prisma.$transaction(async (tx) => {
          await tx.storeBill.update({
            where: { id: existing.id },
            data: {
              redeemCount: existing.redeemCount + list.length,
              redeemAmount: round2(Number(existing.redeemAmount) + redeemAmount),
              payoutAmount: round2(Number(existing.payoutAmount) + payoutAmount),
              settlementRate: rate,
            },
          });
          await tx.storePayout.updateMany({
            where: { id: { in: list.map((p) => p.id) } },
            data: { storeBillId: existing.id },
          });
        });
        created += 1;
        continue;
      }

      const redeemAmount = round2(list.reduce((s, p) => s + Number(p.redeemAmount), 0));
      const payoutAmount = round2(list.reduce((s, p) => s + Number(p.payoutAmount), 0));
      const rate = Number(list[0].settlementRate);
      await this.prisma.$transaction(async (tx) => {
        const bill = await tx.storeBill.create({
          data: {
            billNo: generateBillNo('SB'),
            storeId,
            billDate,
            redeemCount: list.length,
            redeemAmount,
            settlementRate: rate,
            payoutAmount,
            status: 'UNPAID',
          },
        });
        await tx.storePayout.updateMany({
          where: { id: { in: list.map((p) => p.id) } },
          data: { storeBillId: bill.id },
        });
      });
      created += 1;
    }

    return { billDate: billDate.toISOString().slice(0, 10), created, skipped, payoutLinked: payouts.length };
  }

  /**
   * 总部「门店账单」统一列表：T+1 StoreBill + 手动提现 StoreWithdrawRequest
   * 中小数据量内存合并后分页。
   */
  async listAdminStoreSettlements(query: {
    page?: number;
    pageSize?: number;
    kind?: string;
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const kind = query.kind === 'T1_BILL' || query.kind === 'WITHDRAW' ? query.kind : undefined;
    const status = query.status?.trim() || undefined;

    const includeBills =
      !kind || kind === 'T1_BILL'
        ? !status || status === 'UNPAID' || status === 'PAID'
        : false;
    const includeWithdraws =
      !kind || kind === 'WITHDRAW'
        ? !status ||
          status === 'PENDING_REVIEW' ||
          status === 'REJECTED' ||
          status === 'PAID'
        : false;

    const billWhere = includeBills
      ? this.buildStoreBillWhere({
          status: status === 'UNPAID' || status === 'PAID' ? status : undefined,
          storeId: query.storeId,
          dateFrom: query.dateFrom,
          dateTo: query.dateTo,
        })
      : null;

    const withdrawWhere: Prisma.StoreWithdrawRequestWhereInput | null = includeWithdraws
      ? (() => {
          const where: Prisma.StoreWithdrawRequestWhereInput = {};
          if (status === 'PENDING_REVIEW' || status === 'REJECTED' || status === 'PAID') {
            where.status = status;
          }
          if (query.storeId) where.storeId = BigInt(query.storeId);
          if (query.dateFrom || query.dateTo) {
            where.appliedAt = {};
            if (query.dateFrom) where.appliedAt.gte = new Date(query.dateFrom);
            if (query.dateTo) {
              const end = new Date(query.dateTo);
              end.setHours(23, 59, 59, 999);
              where.appliedAt.lte = end;
            }
          }
          return where;
        })()
      : null;

    const bills = billWhere
      ? await this.prisma.storeBill.findMany({
          where: billWhere,
          include: {
            store: { select: { id: true, name: true, cityName: true, phone: true } },
          },
        })
      : [];
    const withdraws = withdrawWhere
      ? await this.prisma.storeWithdrawRequest.findMany({
          where: withdrawWhere,
          include: {
            store: { select: { id: true, name: true, cityName: true, phone: true } },
          },
        })
      : [];

    const now = new Date();
    type UnifiedRow = {
      kind: 'T1_BILL' | 'WITHDRAW';
      id: bigint;
      billNo: string;
      storeId: bigint;
      amount: number;
      status: string;
      date: Date;
      overdue?: boolean;
      redeemCount?: number;
      redeemAmount?: number;
      settlementRate?: number;
      payoutCount?: number;
      store?: { id: bigint; name: string; cityName: string; phone: string | null };
    };

    const rows: UnifiedRow[] = [
      ...bills.map((b) => ({
        kind: 'T1_BILL' as const,
        id: b.id,
        billNo: b.billNo,
        storeId: b.storeId,
        amount: Number(b.payoutAmount),
        status: b.status,
        date: b.billDate,
        redeemCount: b.redeemCount,
        redeemAmount: Number(b.redeemAmount),
        settlementRate: Number(b.settlementRate),
        store: b.store,
      })),
      ...withdraws.map((w) => ({
        kind: 'WITHDRAW' as const,
        id: w.id,
        billNo: w.withdrawNo,
        storeId: w.storeId,
        amount: Number(w.amount),
        status: w.status,
        date: w.appliedAt,
        overdue: w.status === 'PENDING_REVIEW' ? isWithdrawOverdue(w.appliedAt, now) : false,
        payoutCount: w.payoutCount,
        store: w.store,
      })),
    ];

    rows.sort((a, b) => {
      const dt = b.date.getTime() - a.date.getTime();
      if (dt !== 0) return dt;
      return Number(b.id - a.id);
    });

    const total = rows.length;
    const slice = rows.slice((page - 1) * pageSize, page * pageSize);
    const redeemAmount = bills.reduce((s, b) => s + Number(b.redeemAmount), 0);
    const payoutAmount = rows.reduce((s, r) => s + r.amount, 0);

    return serializeBigInt({
      items: slice,
      total,
      page,
      pageSize,
      summary: {
        count: total,
        redeemAmount,
        payoutAmount,
        totalAmount: payoutAmount,
      },
    });
  }

  async listAdminStoreBills(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where = this.buildStoreBillWhere(query);

    const [items, total, aggregates] = await Promise.all([
      this.prisma.storeBill.findMany({
        where,
        orderBy: [{ billDate: 'desc' }, { id: 'desc' }],
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: {
          store: { select: { id: true, name: true, cityName: true, phone: true } },
        },
      }),
      this.prisma.storeBill.count({ where }),
      this.prisma.storeBill.aggregate({
        where,
        _sum: { redeemAmount: true, payoutAmount: true },
        _count: true,
      }),
    ]);

    const summary = {
      count: aggregates._count,
      redeemAmount: Number(aggregates._sum.redeemAmount ?? 0),
      payoutAmount: Number(aggregates._sum.payoutAmount ?? 0),
      totalAmount: Number(aggregates._sum.payoutAmount ?? 0),
    };

    return serializeBigInt({ items, total, page, pageSize, summary });
  }

  async getAdminStoreBill(id: bigint) {
    const bill = await this.prisma.storeBill.findUnique({
      where: { id },
      include: {
        store: { select: { id: true, name: true, cityName: true, phone: true } },
        payouts: {
          include: { redeemRecord: { select: { redeemNo: true, amount: true, createdAt: true } } },
          orderBy: { createdAt: 'desc' },
        },
      },
    });
    if (!bill) throw new NotFoundException('门店对账单不存在');
    return serializeBigInt(bill);
  }

  async confirmStoreBill(id: bigint) {
    const bill = await this.prisma.storeBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('门店对账单不存在');
    if (bill.status !== 'UNPAID') throw new BadRequestException('仅未打款账单可确认打款');

    const paidAt = new Date();
    const updated = await this.prisma.$transaction(async (tx) => {
      const b = await tx.storeBill.update({
        where: { id },
        data: { status: 'PAID', paidAt },
      });
      await tx.storePayout.updateMany({
        where: { storeBillId: id, status: 'PENDING' },
        data: { status: 'PAID', paidAt },
      });
      return b;
    });
    return serializeBigInt(updated);
  }

  async batchConfirmStoreBills(ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.confirmStoreBill(BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async exportAdminStoreBills(query: {
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    const where = this.buildStoreBillWhere(query);
    const bills = await this.prisma.storeBill.findMany({
      where,
      include: { store: { select: { name: true, phone: true, cityName: true } } },
      orderBy: { billDate: 'desc' },
    });
    const header = ['账单号', '账单日', '门店', '城市', '核销笔数', '核销金额', '结算比例', '应付金额', '状态', '打款时间'].join(',');
    const rows = bills.map((b) =>
      [
        csvEscape(b.billNo),
        b.billDate.toISOString().slice(0, 10),
        csvEscape(b.store.name),
        csvEscape(b.store.cityName ?? ''),
        b.redeemCount,
        Number(b.redeemAmount),
        Number(b.settlementRate),
        Number(b.payoutAmount),
        b.status,
        b.paidAt ? b.paidAt.toISOString().slice(0, 19).replace('T', ' ') : '',
      ].join(','),
    );
    return { csv: `\uFEFF${[header, ...rows].join('\n')}`, count: bills.length };
  }

  private buildStoreBillWhere(query: {
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }): Prisma.StoreBillWhereInput {
    const where: Prisma.StoreBillWhereInput = {};
    if (query.status === 'UNPAID' || query.status === 'PAID') where.status = query.status;
    if (query.storeId) where.storeId = BigInt(query.storeId);
    if (query.dateFrom || query.dateTo) {
      where.billDate = {};
      if (query.dateFrom) where.billDate.gte = startOfDay(new Date(query.dateFrom));
      if (query.dateTo) where.billDate.lte = startOfDay(new Date(query.dateTo));
    }
    return where;
  }

  /** @deprecated 兼容旧 daily 聚合视图 */
  async listAdminStoreDailyBills(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    storeId?: string;
    dateFrom?: string;
    dateTo?: string;
  }) {
    return this.listAdminStoreBills(query);
  }

  // ─── Partner bills ───────────────────────────────────

  async listPartnerBills(partnerAccountId: bigint) {
    const primary = await this.partnerCityService.resolvePrimaryAccount(partnerAccountId);
    const bills = await this.prisma.partnerBill.findMany({
      where: {
        partnerAccountId: primary.id,
        status: { in: ['AWAITING_CONFIRM', 'UNPAID', 'PAID', 'REJECTED'] },
      },
      orderBy: { createdAt: 'desc' },
    });
    this.analyticsService.trackPartnerOneSafe(partnerAccountId, 'PARTNER_H5', {
      partnerAccountId: primary.id,
      eventName: 'partner_bill_view',
      extraJson: { count: bills.length },
    });
    return serializeBigInt(bills);
  }

  async getPartnerBill(partnerAccountId: bigint, billId: bigint) {
    const primary = await this.partnerCityService.resolvePrimaryAccount(partnerAccountId);
    const bill = await this.prisma.partnerBill.findFirst({
      where: { id: billId, partnerAccountId: primary.id },
    });
    if (!bill) throw new NotFoundException('账单不存在');
    this.analyticsService.trackPartnerOneSafe(partnerAccountId, 'PARTNER_H5', {
      partnerAccountId: primary.id,
      eventName: 'partner_bill_detail_view',
      refType: 'PARTNER_BILL',
      refId: billId,
      extraJson: { billId: billId.toString(), status: bill.status },
    });
    return serializeBigInt(bill);
  }

  async listAdminPartnerBills(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    partnerId?: string;
    year?: number;
    month?: number;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where = this.buildPartnerBillWhere(query);

    const [rawItems, total, aggregates] = await Promise.all([
      this.prisma.partnerBill.findMany({
        where,
        orderBy: { periodStart: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: {
          partnerAccount: {
            select: { id: true, companyName: true, name: true, phone: true },
          },
        },
      }),
      this.prisma.partnerBill.count({ where }),
      this.prisma.partnerBill.aggregate({
        where,
        _sum: { orderCommission: true, redeemCommission: true, totalAmount: true },
        _count: true,
      }),
    ]);

    const items = rawItems.map((b) => ({
      ...b,
      partner: b.partnerAccount,
    }));

    const summary = {
      count: aggregates._count,
      orderCommission: Number(aggregates._sum.orderCommission ?? 0),
      redeemCommission: Number(aggregates._sum.redeemCommission ?? 0),
      totalAmount: Number(aggregates._sum.totalAmount ?? 0),
    };

    return serializeBigInt({ items, total, page, pageSize, summary });
  }

  private buildPartnerBillWhere(query: {
    status?: string;
    partnerId?: string;
    year?: number;
    month?: number;
  }): Prisma.PartnerBillWhereInput {
    const where: Prisma.PartnerBillWhereInput = {};
    if (query.status) where.status = query.status as Prisma.EnumPartnerBillStatusFilter['equals'];
    if (query.partnerId) where.partnerAccountId = BigInt(query.partnerId);
    if (query.year && query.month) {
      const periodStart = new Date(query.year, query.month - 1, 1);
      const periodEnd = new Date(query.year, query.month, 0, 23, 59, 59, 999);
      where.periodStart = { gte: periodStart, lte: periodEnd };
    }
    return where;
  }

  async generateAllPartnerBills(body: { year: number; month: number }) {
    const partners = await this.prisma.partnerAccount.findMany({
      where: { isPrimary: 1, status: 'ACTIVE' },
      select: { id: true, companyName: true },
    });
    const results: Array<{ partnerId: string; companyName: string; ok: boolean; message?: string }> = [];
    for (const p of partners) {
      try {
        await this.generatePartnerBill({
          partnerId: p.id.toString(),
          year: body.year,
          month: body.month,
        });
        results.push({ partnerId: p.id.toString(), companyName: p.companyName ?? '', ok: true });
      } catch (e) {
        results.push({
          partnerId: p.id.toString(),
          companyName: p.companyName ?? '',
          ok: false,
          message: e instanceof Error ? e.message : '失败',
        });
      }
    }
    return {
      total: partners.length,
      success: results.filter((r) => r.ok).length,
      failed: results.filter((r) => !r.ok).length,
      results,
    };
  }

  /** 每月 1 日任务：生成上一自然月账单 */
  async generatePreviousMonthPartnerBills(anchor = new Date()) {
    const prev = new Date(anchor.getFullYear(), anchor.getMonth() - 1, 1);
    return this.generateAllPartnerBills({ year: prev.getFullYear(), month: prev.getMonth() + 1 });
  }

  async getAdminPartnerBill(id: bigint) {
    const bill = await this.prisma.partnerBill.findUnique({
      where: { id },
      include: { partnerAccount: true },
    });
    if (!bill) throw new NotFoundException('账单不存在');
    return serializeBigInt(bill);
  }

  async generatePartnerBill(body: { partnerId: string; year: number; month: number }) {
    const partnerAccountId = BigInt(body.partnerId);
    const primary = await this.partnerCityService.resolvePrimaryAccount(partnerAccountId);
    const periodStart = new Date(body.year, body.month - 1, 1);
    const periodEnd = new Date(body.year, body.month, 0, 23, 59, 59, 999);

    const existing = await this.prisma.partnerBill.findUnique({
      where: {
        partnerAccountId_periodStart: { partnerAccountId: primary.id, periodStart },
      },
    });
    if (existing && existing.status !== 'PENDING_REVIEW') {
      throw new BadRequestException('该月账单已进入审核流程，不可重复生成');
    }

    if (!primary.cityId) {
      throw new BadRequestException('合伙人未绑定开城城市');
    }

    const orderCommissionRate = Number(primary.orderCommissionRate ?? 0);
    const redeemCommissionRate = Number(primary.redeemCommissionRate ?? 0.03);

    const orders = await this.prisma.order.findMany({
      where: {
        cityId: primary.cityId,
        payStatus: 'PAID',
        paidAt: { gte: periodStart, lte: periodEnd },
        isTest: false,
      },
    });
    const orderCommission = primary.isTest
      ? 0
      : orders.reduce((sum, o) => {
      if (o.partnerAccountIdAtPay) {
        if (o.partnerAccountIdAtPay !== primary.id) return sum;
        const rate = o.orderCommissionRateAtPay != null ? Number(o.orderCommissionRateAtPay) : 0;
        return sum + Number(o.payAmount) * rate;
      }
      return sum + Number(o.payAmount) * orderCommissionRate;
    }, 0);

    const stores = await this.prisma.store.findMany({
      where: { partnerAccountId: primary.id },
      select: { id: true },
    });
    const storeIds = stores.map((s) => s.id);
    const redeems =
      primary.isTest || !storeIds.length
        ? []
        : await this.prisma.redeemRecord.findMany({
          where: {
            storeId: { in: storeIds },
            createdAt: { gte: periodStart, lte: periodEnd },
            isTest: false,
          },
        });
    const redeemCommission = redeems.reduce(
      (sum, r) => sum + Number(r.amount) * redeemCommissionRate,
      0,
    );

    const totalAmount = round2(orderCommission + redeemCommission);

    const bill = existing
      ? await this.prisma.partnerBill.update({
          where: { id: existing.id },
          data: {
            orderCommission: round2(orderCommission),
            redeemCommission: round2(redeemCommission),
            totalAmount,
            periodEnd,
            status: 'PENDING_REVIEW',
          },
        })
      : await this.prisma.partnerBill.create({
          data: {
            billNo: generateBillNo('PB'),
            partnerAccountId: primary.id,
            periodStart,
            periodEnd,
            orderCommission: round2(orderCommission),
            redeemCommission: round2(redeemCommission),
            totalAmount,
            status: 'PENDING_REVIEW',
          },
        });

    return serializeBigInt(bill);
  }

  /** HQ：发送给合伙人（待审核 → 待合伙人确认） */
  async sendPartnerBill(id: bigint) {
    const bill = await this.prisma.partnerBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('账单不存在');
    if (bill.status !== 'PENDING_REVIEW' && bill.status !== 'REJECTED') {
      throw new BadRequestException('仅待审核或已驳回账单可发送');
    }
    const updated = await this.prisma.partnerBill.update({
      where: { id },
      data: {
        status: 'AWAITING_CONFIRM',
        sentAt: new Date(),
        rejectReason: null,
      },
    });
    return serializeBigInt(updated);
  }

  async batchSendPartnerBills(ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.sendPartnerBill(BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  /** @deprecated HQ 代确认：待审核/待确认 → 未打款 */
  async confirmPartnerBill(id: bigint) {
    const bill = await this.prisma.partnerBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('账单不存在');
    if (bill.status !== 'PENDING_REVIEW' && bill.status !== 'AWAITING_CONFIRM' && bill.status !== 'REJECTED') {
      throw new BadRequestException('当前状态不可确认');
    }
    const updated = await this.prisma.partnerBill.update({
      where: { id },
      data: {
        status: 'UNPAID',
        confirmedAt: new Date(),
        sentAt: bill.sentAt ?? new Date(),
        rejectReason: null,
      },
    });
    return serializeBigInt(updated);
  }

  /** 合伙人确认：待合伙人确认 → 未打款 */
  async partnerConfirmBill(partnerAccountId: bigint, billId: bigint) {
    const primary = await this.partnerCityService.resolvePrimaryAccount(partnerAccountId);
    const bill = await this.prisma.partnerBill.findUnique({ where: { id: billId } });
    if (!bill || bill.partnerAccountId !== primary.id) {
      throw new NotFoundException('账单不存在');
    }
    if (bill.status !== 'AWAITING_CONFIRM') {
      throw new BadRequestException('当前账单不可确认');
    }

    const updated = await this.prisma.partnerBill.update({
      where: { id: billId },
      data: {
        status: 'UNPAID',
        confirmedAt: new Date(),
        rejectReason: null,
      },
    });

    this.analyticsService.trackPartnerOneSafe(partnerAccountId, 'PARTNER_H5', {
      partnerAccountId: primary.id,
      eventName: 'partner_bill_confirm',
      refType: 'PARTNER_BILL',
      refId: billId,
      extraJson: { billNo: bill.billNo },
    });

    return serializeBigInt(updated);
  }

  async batchPartnerConfirmBills(partnerAccountId: bigint, ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.partnerConfirmBill(partnerAccountId, BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async rejectPartnerBill(id: bigint, reason: string) {
    const rejectReason = reason.trim();
    if (!rejectReason) throw new BadRequestException('请填写驳回理由');
    if (rejectReason.length > 500) throw new BadRequestException('驳回理由不能超过 500 字');

    const bill = await this.prisma.partnerBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('账单不存在');
    if (bill.status !== 'AWAITING_CONFIRM' && bill.status !== 'UNPAID') {
      throw new BadRequestException('仅待合伙人确认或未打款账单可驳回');
    }

    const updated = await this.prisma.partnerBill.update({
      where: { id },
      data: {
        status: 'REJECTED',
        rejectReason,
      },
    });

    return serializeBigInt(updated);
  }

  async markPartnerBillPaid(id: bigint, _dto: { paymentRef?: string } = {}) {
    const bill = await this.prisma.partnerBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('账单不存在');
    if (bill.status !== 'UNPAID') throw new BadRequestException('仅未打款账单可标记打款');

    const updated = await this.prisma.partnerBill.update({
      where: { id },
      data: { status: 'PAID', paidAt: new Date(), rejectReason: null },
    });

    return serializeBigInt(updated);
  }

  async batchMarkPartnerBillsPaid(ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.markPartnerBillPaid(BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async exportPartnerBills(query: {
    partnerId?: string;
    status?: string;
    year?: number;
    month?: number;
  }) {
    const where = this.buildPartnerBillWhere(query);
    const bills = await this.prisma.partnerBill.findMany({
      where,
      include: { partnerAccount: { select: { companyName: true, phone: true } } },
      orderBy: { periodStart: 'desc' },
    });

    const header = [
      '账单号',
      '合伙人',
      '登录手机',
      '账期起',
      '账期止',
      '酒单佣金',
      '核销佣金',
      '合计应付',
      '状态',
      '发送时间',
      '确认时间',
      '打款时间',
      '驳回理由',
    ].join(',');
    const rows = bills.map((b) =>
      [
        csvEscape(b.billNo),
        csvEscape(b.partnerAccount.companyName ?? ''),
        csvEscape(b.partnerAccount.phone ?? ''),
        b.periodStart.toISOString().slice(0, 10),
        b.periodEnd.toISOString().slice(0, 10),
        Number(b.orderCommission),
        Number(b.redeemCommission),
        Number(b.totalAmount),
        b.status,
        b.sentAt ? b.sentAt.toISOString().slice(0, 10) : '',
        b.confirmedAt ? b.confirmedAt.toISOString().slice(0, 10) : '',
        b.paidAt ? b.paidAt.toISOString().slice(0, 10) : '',
        csvEscape(b.rejectReason ?? ''),
      ].join(','),
    );
    return { csv: `\uFEFF${[header, ...rows].join('\n')}`, count: bills.length };
  }

  // ─── Winery bills ────────────────────────────────────

  async generateWineryBillForDay(anchor = new Date()) {
    const { start, end, billDate } = wineryDayWindow(anchor);
    const rate = WINERY_SETTLEMENT_RATE;

    const existing = await this.prisma.wineryBill.findUnique({ where: { billDate } });
    if (existing?.status === 'PAID') {
      return { billDate: billDate.toISOString().slice(0, 10), skipped: true, reason: '已打款' };
    }

    // T+3：纳入「账单日」当天完成的同城/跨城订单（完成日 = 今天 − lagDays）
    const orders = await this.prisma.order.findMany({
      where: {
        status: 'COMPLETED',
        payStatus: 'PAID',
        deliveryType: { in: ['LOCAL', 'CROSS_CITY'] },
        completedAt: { gte: start, lt: end },
        isTest: false,
      },
      orderBy: { completedAt: 'asc' },
    });

    if (orders.length === 0 && !existing) {
      return { billDate: billDate.toISOString().slice(0, 10), skipped: true, reason: '无订单' };
    }

    const orderAmount = round2(orders.reduce((s, o) => s + Number(o.payAmount), 0));
    const wineryAmount = round2(orderAmount * rate);

    const bill = await this.prisma.$transaction(async (tx) => {
      const header = existing
        ? await tx.wineryBill.update({
            where: { id: existing.id },
            data: {
              orderCount: orders.length,
              orderAmount,
              wineryRate: rate,
              wineryAmount,
            },
          })
        : await tx.wineryBill.create({
            data: {
              billNo: generateBillNo('WB'),
              billDate,
              orderCount: orders.length,
              orderAmount,
              wineryRate: rate,
              wineryAmount,
              status: 'UNPAID',
            },
          });

      if (existing) {
        await tx.wineryBillItem.deleteMany({ where: { wineryBillId: header.id } });
      }

      if (orders.length > 0) {
        await tx.wineryBillItem.createMany({
          data: orders.map((o) => ({
            wineryBillId: header.id,
            orderId: o.id,
            orderNo: o.orderNo,
            deliveryType: o.deliveryType,
            payAmount: o.payAmount,
            wineryAmount: round2(Number(o.payAmount) * rate),
            // 明细仍保留支付时间；账期窗口按 completedAt 归属
            paidAt: o.paidAt ?? o.completedAt!,
          })),
        });
      }

      return header;
    });

    return serializeBigInt({
      billDate: billDate.toISOString().slice(0, 10),
      skipped: false,
      bill,
    });
  }

  async listAdminWineryBills(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    dateFrom?: string;
    dateTo?: string;
    year?: number;
    month?: number;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where = this.buildWineryBillWhere(query);

    const [items, total, aggregates] = await Promise.all([
      this.prisma.wineryBill.findMany({
        where,
        orderBy: { billDate: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
      }),
      this.prisma.wineryBill.count({ where }),
      this.prisma.wineryBill.aggregate({
        where,
        _sum: { orderAmount: true, wineryAmount: true },
        _count: true,
      }),
    ]);

    const summary = {
      count: aggregates._count,
      orderAmount: Number(aggregates._sum.orderAmount ?? 0),
      wineryAmount: Number(aggregates._sum.wineryAmount ?? 0),
      totalAmount: Number(aggregates._sum.wineryAmount ?? 0),
    };

    return serializeBigInt({ items, total, page, pageSize, summary });
  }

  async getAdminWineryBill(id: bigint) {
    const bill = await this.prisma.wineryBill.findUnique({
      where: { id },
      include: { items: { orderBy: { paidAt: 'desc' } } },
    });
    if (!bill) throw new NotFoundException('酒厂对账单不存在');
    return serializeBigInt(bill);
  }

  async confirmWineryBill(id: bigint) {
    const bill = await this.prisma.wineryBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('酒厂对账单不存在');
    if (bill.status !== 'UNPAID') throw new BadRequestException('仅未打款账单可确认打款');
    if (Number(bill.wineryAmount) === 0) {
      throw new BadRequestException('应付为 0，无需打款');
    }
    const updated = await this.prisma.wineryBill.update({
      where: { id },
      data: { status: 'PAID', paidAt: new Date() },
    });
    return serializeBigInt(updated);
  }

  async batchConfirmWineryBills(ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.confirmWineryBill(BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async exportAdminWineryBills(query: {
    status?: string;
    dateFrom?: string;
    dateTo?: string;
    year?: number;
    month?: number;
  }) {
    const where = this.buildWineryBillWhere(query);
    const bills = await this.prisma.wineryBill.findMany({
      where,
      include: { items: true },
      orderBy: { billDate: 'desc' },
    });

    const header = [
      '账单号',
      '账单日',
      '订单号',
      '配送类型',
      '实付金额',
      '酒厂比例',
      '应付',
      '支付时间',
      '账单状态',
    ].join(',');
    const rows: string[] = [];
    const statusLabel = (b: { status: string; wineryAmount: Prisma.Decimal | number }) => {
      if (Number(b.wineryAmount) === 0) return '无需打款';
      if (b.status === 'PAID') return '已打款';
      if (b.status === 'UNPAID') return '未打款';
      return b.status;
    };
    for (const b of bills) {
      if (b.items.length === 0) {
        rows.push(
          [
            csvEscape(b.billNo),
            b.billDate.toISOString().slice(0, 10),
            '',
            '',
            Number(b.orderAmount),
            Number(b.wineryRate),
            Number(b.wineryAmount),
            '',
            statusLabel(b),
          ].join(','),
        );
        continue;
      }
      for (const item of b.items) {
        rows.push(
          [
            csvEscape(b.billNo),
            b.billDate.toISOString().slice(0, 10),
            csvEscape(item.orderNo),
            item.deliveryType === 'LOCAL' ? '同城' : item.deliveryType === 'CROSS_CITY' ? '跨城' : item.deliveryType,
            Number(item.payAmount),
            Number(b.wineryRate),
            Number(item.wineryAmount),
            item.paidAt.toISOString().slice(0, 19).replace('T', ' '),
            statusLabel(b),
          ].join(','),
        );
      }
    }
    return { csv: `\uFEFF${[header, ...rows].join('\n')}`, count: rows.length };
  }

  private buildWineryBillWhere(query: {
    status?: string;
    dateFrom?: string;
    dateTo?: string;
    year?: number;
    month?: number;
  }): Prisma.WineryBillWhereInput {
    const where: Prisma.WineryBillWhereInput = {};
    if (query.status === 'NO_PAYMENT_NEEDED') {
      where.wineryAmount = 0;
    } else if (query.status === 'UNPAID') {
      where.status = 'UNPAID';
      where.wineryAmount = { gt: 0 };
    } else if (query.status === 'PAID') {
      where.status = 'PAID';
      where.wineryAmount = { gt: 0 };
    }
    if (query.year && query.month) {
      const start = new Date(query.year, query.month - 1, 1);
      const end = new Date(query.year, query.month, 0, 23, 59, 59, 999);
      where.billDate = { gte: start, lte: end };
    } else if (query.dateFrom || query.dateTo) {
      where.billDate = {};
      if (query.dateFrom) where.billDate.gte = startOfDay(new Date(query.dateFrom));
      if (query.dateTo) where.billDate.lte = startOfDay(new Date(query.dateTo));
    }
    return where;
  }

  // ─── Logistics bills (按承运商月结) ───────────────────

  async generatePreviousMonthLogisticsBills(anchor = new Date()) {
    const prev = new Date(anchor.getFullYear(), anchor.getMonth() - 1, 1);
    return this.generateAllLogisticsBills({
      year: prev.getFullYear(),
      month: prev.getMonth() + 1,
    });
  }

  async generateAllLogisticsBills(body: { year: number; month: number }) {
    const providers = await this.prisma.fulfillmentProvider.findMany({
      where: { status: 'ACTIVE' },
      orderBy: { code: 'asc' },
    });
    const results: Array<{
      providerId: string;
      providerCode: string;
      providerName: string;
      ok: boolean;
      skipped?: boolean;
      message?: string;
      billId?: string;
    }> = [];

    for (const p of providers) {
      try {
        const bill = await this.generateLogisticsBill({
          providerId: p.id.toString(),
          year: body.year,
          month: body.month,
        });
        results.push({
          providerId: p.id.toString(),
          providerCode: p.code,
          providerName: p.name,
          ok: true,
          skipped: Boolean(bill.skipped),
          message: bill.reason,
          billId:
            bill.bill?.id != null
              ? typeof bill.bill.id === 'string'
                ? bill.bill.id
                : String(bill.bill.id)
              : undefined,
        });
      } catch (e) {
        results.push({
          providerId: p.id.toString(),
          providerCode: p.code,
          providerName: p.name,
          ok: false,
          message: e instanceof Error ? e.message : '失败',
        });
      }
    }

    return {
      total: providers.length,
      success: results.filter((r) => r.ok).length,
      failed: results.filter((r) => !r.ok).length,
      results,
    };
  }

  async generateLogisticsBill(body: { providerId: string; year: number; month: number }) {
    const fulfillmentProviderId = BigInt(body.providerId);
    const provider = await this.prisma.fulfillmentProvider.findUnique({
      where: { id: fulfillmentProviderId },
    });
    if (!provider) throw new NotFoundException('仓配承运商不存在');

    const periodStart = new Date(body.year, body.month - 1, 1);
    const periodEnd = new Date(body.year, body.month, 0, 23, 59, 59, 999);

    const existing = await this.prisma.logisticsBill.findUnique({
      where: {
        fulfillmentProviderId_periodStart: { fulfillmentProviderId, periodStart },
      },
    });
    if (existing?.status === 'PAID') {
      return {
        skipped: true,
        reason: '该月账单已结算',
        bill: serializeBigInt(existing),
      };
    }

    const pricing =
      this.fulfillmentProviderService.parsePricingRules(provider.pricingRulesJson) ??
      (provider.code.toUpperCase() === 'XFX' || provider.code.toUpperCase() === 'XIAOFEIXIA'
        ? { ...DEFAULT_XFX_LOGISTICS_PRICING }
        : null);
    if (!pricing) {
      throw new BadRequestException(`承运商 ${provider.name} 未配置计价标准`);
    }

    const deliveries = await this.prisma.orderDelivery.findMany({
      where: {
        fulfillmentProviderId,
        OR: [
          { shippingAt: { gte: periodStart, lte: periodEnd } },
          {
            shippingAt: null,
            outWarehouseAt: { gte: periodStart, lte: periodEnd },
          },
        ],
      },
      include: {
        order: {
          select: {
            id: true,
            orderNo: true,
            quantity: true,
            deliveryType: true,
            payStatus: true,
            isTest: true,
          },
        },
      },
      orderBy: [{ shippingAt: 'asc' }, { outWarehouseAt: 'asc' }],
    });

    const eligible = deliveries.filter(
      (d) =>
        !d.order.isTest &&
        d.order.payStatus === 'PAID' &&
        (d.order.deliveryType === 'LOCAL' || d.order.deliveryType === 'CROSS_CITY'),
    );

    if (eligible.length === 0 && !existing) {
      return { skipped: true, reason: '无发货订单', bill: null };
    }

    const items = eligible.map((d) => {
      const qty = d.order.quantity;
      const fee = calcLogisticsFeeByBottles(qty, pricing as LogisticsPricingRule);
      const shippedAt = d.shippingAt ?? d.outWarehouseAt ?? periodStart;
      return {
        orderId: d.order.id,
        orderNo: d.order.orderNo,
        quantity: qty,
        logisticsAmount: fee,
        shippedAt,
      };
    });

    const orderCount = items.length;
    const bottleCount = items.reduce((s, i) => s + i.quantity, 0);
    const logisticsAmount = round2(items.reduce((s, i) => s + i.logisticsAmount, 0));
    const settlementMethod = provider.settlementMethod;
    const pricingSnapshotJson = JSON.stringify(pricing);

    const bill = await this.prisma.$transaction(async (tx) => {
      const header = existing
        ? await tx.logisticsBill.update({
            where: { id: existing.id },
            data: {
              periodEnd,
              orderCount,
              bottleCount,
              logisticsAmount,
              settlementMethod,
              pricingSnapshotJson,
              status: 'UNPAID',
              paidAt: null,
            },
          })
        : await tx.logisticsBill.create({
            data: {
              billNo: generateBillNo('LB'),
              fulfillmentProviderId,
              periodStart,
              periodEnd,
              orderCount,
              bottleCount,
              logisticsAmount,
              settlementMethod,
              pricingSnapshotJson,
              status: 'UNPAID',
            },
          });

      if (existing) {
        await tx.logisticsBillItem.deleteMany({ where: { logisticsBillId: header.id } });
      }

      if (items.length > 0) {
        await tx.logisticsBillItem.createMany({
          data: items.map((i) => ({
            logisticsBillId: header.id,
            orderId: i.orderId,
            orderNo: i.orderNo,
            quantity: i.quantity,
            logisticsAmount: i.logisticsAmount,
            shippedAt: i.shippedAt,
          })),
        });
      }

      // 充值模式：余额充足则自动扣款并标记已结算
      if (settlementMethod === 'PREPAID' && logisticsAmount > 0) {
        const deducted = await this.fulfillmentProviderService.deductPrepaid(
          fulfillmentProviderId,
          logisticsAmount,
          header.id,
          tx,
        );
        if (deducted.ok) {
          return tx.logisticsBill.update({
            where: { id: header.id },
            data: { status: 'PAID', paidAt: new Date() },
          });
        }
      }

      return header;
    });

    return {
      skipped: false,
      bill: serializeBigInt(bill),
    };
  }

  async listAdminLogisticsBills(query: {
    page?: number;
    pageSize?: number;
    status?: string;
    providerId?: string;
    year?: number;
    month?: number;
  }) {
    const page = query.page ?? 1;
    const pageSize = query.pageSize ?? 20;
    const where = this.buildLogisticsBillWhere(query);

    const [rawItems, total, aggregates] = await Promise.all([
      this.prisma.logisticsBill.findMany({
        where,
        orderBy: { periodStart: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
        include: {
          fulfillmentProvider: {
            select: {
              id: true,
              code: true,
              name: true,
              settlementMethod: true,
              prepaidBalance: true,
              bankAccountName: true,
              bankName: true,
              bankAccountNo: true,
            },
          },
        },
      }),
      this.prisma.logisticsBill.count({ where }),
      this.prisma.logisticsBill.aggregate({
        where,
        _sum: { logisticsAmount: true, bottleCount: true, orderCount: true },
        _count: true,
      }),
    ]);

    const items = rawItems.map((b) => ({
      ...b,
      providerCode: b.fulfillmentProvider.code,
      providerName: b.fulfillmentProvider.name,
      pricingSnapshot: this.fulfillmentProviderService.parsePricingRules(b.pricingSnapshotJson),
    }));

    const summary = {
      count: aggregates._count,
      logisticsAmount: Number(aggregates._sum.logisticsAmount ?? 0),
      bottleCount: Number(aggregates._sum.bottleCount ?? 0),
      totalAmount: Number(aggregates._sum.logisticsAmount ?? 0),
    };

    return serializeBigInt({ items, total, page, pageSize, summary });
  }

  async listLogisticsProviderSummary(query: { year?: number; month?: number }) {
    const year = query.year ?? new Date().getFullYear();
    const month = query.month ?? new Date().getMonth() + 1;
    const periodStart = new Date(year, month - 1, 1);
    const periodEnd = new Date(year, month, 0, 23, 59, 59, 999);

    const providers = await this.prisma.fulfillmentProvider.findMany({
      orderBy: { code: 'asc' },
    });

    const rows: Array<{
      providerId: string;
      providerCode: string;
      providerName: string;
      settlementMethod: string;
      prepaidBalance: number;
      bankAccountName: string | null;
      bankName: string | null;
      bankAccountNo: string | null;
      pricingRules: ReturnType<FulfillmentProviderService['parsePricingRules']>;
      orderCount: number;
      bottleCount: number;
      logisticsAmount: number;
      billId: string | null;
      billStatus: string | null;
      billAmount: number | null;
    }> = [];
    for (const p of providers) {
      const pricing =
        this.fulfillmentProviderService.parsePricingRules(p.pricingRulesJson) ??
        (p.code.toUpperCase() === 'XFX' || p.code.toUpperCase() === 'XIAOFEIXIA'
          ? { ...DEFAULT_XFX_LOGISTICS_PRICING }
          : null);

      const deliveries = await this.prisma.orderDelivery.findMany({
        where: {
          fulfillmentProviderId: p.id,
          OR: [
            { shippingAt: { gte: periodStart, lte: periodEnd } },
            {
              shippingAt: null,
              outWarehouseAt: { gte: periodStart, lte: periodEnd },
            },
          ],
        },
        include: {
          order: { select: { quantity: true, payStatus: true, deliveryType: true } },
        },
      });

      const eligible = deliveries.filter(
        (d) =>
          d.order.payStatus === 'PAID' &&
          (d.order.deliveryType === 'LOCAL' || d.order.deliveryType === 'CROSS_CITY'),
      );
      const orderCount = eligible.length;
      const bottleCount = eligible.reduce((s, d) => s + d.order.quantity, 0);
      let logisticsAmount = 0;
      if (pricing) {
        logisticsAmount = round2(
          eligible.reduce(
            (s, d) => s + calcLogisticsFeeByBottles(d.order.quantity, pricing as LogisticsPricingRule),
            0,
          ),
        );
      }

      const bill = await this.prisma.logisticsBill.findUnique({
        where: {
          fulfillmentProviderId_periodStart: {
            fulfillmentProviderId: p.id,
            periodStart,
          },
        },
      });

      rows.push({
        providerId: p.id.toString(),
        providerCode: p.code,
        providerName: p.name,
        settlementMethod: p.settlementMethod,
        prepaidBalance: Number(p.prepaidBalance),
        bankAccountName: p.bankAccountName,
        bankName: p.bankName,
        bankAccountNo: p.bankAccountNo,
        pricingRules: pricing,
        orderCount,
        bottleCount,
        logisticsAmount,
        billId: bill?.id?.toString() ?? null,
        billStatus: bill?.status ?? null,
        billAmount: bill ? Number(bill.logisticsAmount) : null,
      });
    }

    return { year, month, items: rows };
  }

  async getAdminLogisticsBill(id: bigint) {
    const bill = await this.prisma.logisticsBill.findUnique({
      where: { id },
      include: {
        fulfillmentProvider: true,
        items: { orderBy: { shippedAt: 'desc' } },
      },
    });
    if (!bill) throw new NotFoundException('物流对账单不存在');
    return serializeBigInt({
      ...bill,
      providerCode: bill.fulfillmentProvider.code,
      providerName: bill.fulfillmentProvider.name,
      pricingSnapshot: this.fulfillmentProviderService.parsePricingRules(bill.pricingSnapshotJson),
    });
  }

  async confirmLogisticsBill(id: bigint) {
    const bill = await this.prisma.logisticsBill.findUnique({ where: { id } });
    if (!bill) throw new NotFoundException('物流对账单不存在');
    if (bill.status !== 'UNPAID') throw new BadRequestException('仅未结算账单可确认');

    if (bill.settlementMethod === 'PREPAID') {
      const deducted = await this.prisma.$transaction(async (tx) => {
        const result = await this.fulfillmentProviderService.deductPrepaid(
          bill.fulfillmentProviderId,
          Number(bill.logisticsAmount),
          bill.id,
          tx,
        );
        if (!result.ok) {
          throw new BadRequestException(
            `充值余额不足（当前 ¥${result.balance.toFixed(2)}，应付 ¥${Number(bill.logisticsAmount).toFixed(2)}）`,
          );
        }
        return tx.logisticsBill.update({
          where: { id },
          data: { status: 'PAID', paidAt: new Date() },
        });
      });
      return serializeBigInt(deducted);
    }

    const updated = await this.prisma.logisticsBill.update({
      where: { id },
      data: { status: 'PAID', paidAt: new Date() },
    });
    return serializeBigInt(updated);
  }

  async batchConfirmLogisticsBills(ids: string[]) {
    const results: Array<{ id: string; ok: boolean; message?: string }> = [];
    for (const id of ids) {
      try {
        await this.confirmLogisticsBill(BigInt(id));
        results.push({ id, ok: true });
      } catch (e) {
        results.push({ id, ok: false, message: e instanceof Error ? e.message : '失败' });
      }
    }
    return results;
  }

  async exportAdminLogisticsBills(query: {
    status?: string;
    providerId?: string;
    year?: number;
    month?: number;
  }) {
    const where = this.buildLogisticsBillWhere(query);
    const bills = await this.prisma.logisticsBill.findMany({
      where,
      include: {
        fulfillmentProvider: { select: { code: true, name: true } },
        items: true,
      },
      orderBy: { periodStart: 'desc' },
    });

    const header = [
      '账单号',
      '承运商编码',
      '承运商名称',
      '账期起',
      '账期止',
      '结算方式',
      '订单号',
      '瓶数',
      '物流费',
      '发货时间',
      '账单状态',
    ].join(',');
    const rows: string[] = [];
    for (const b of bills) {
      if (b.items.length === 0) {
        rows.push(
          [
            csvEscape(b.billNo),
            csvEscape(b.fulfillmentProvider.code),
            csvEscape(b.fulfillmentProvider.name),
            b.periodStart.toISOString().slice(0, 10),
            b.periodEnd.toISOString().slice(0, 10),
            b.settlementMethod,
            '',
            b.bottleCount,
            Number(b.logisticsAmount),
            '',
            b.status,
          ].join(','),
        );
        continue;
      }
      for (const item of b.items) {
        rows.push(
          [
            csvEscape(b.billNo),
            csvEscape(b.fulfillmentProvider.code),
            csvEscape(b.fulfillmentProvider.name),
            b.periodStart.toISOString().slice(0, 10),
            b.periodEnd.toISOString().slice(0, 10),
            b.settlementMethod,
            csvEscape(item.orderNo),
            item.quantity,
            Number(item.logisticsAmount),
            item.shippedAt.toISOString().slice(0, 19).replace('T', ' '),
            b.status,
          ].join(','),
        );
      }
    }
    return { csv: `\uFEFF${[header, ...rows].join('\n')}`, count: rows.length };
  }

  private buildLogisticsBillWhere(query: {
    status?: string;
    providerId?: string;
    year?: number;
    month?: number;
  }): Prisma.LogisticsBillWhereInput {
    const where: Prisma.LogisticsBillWhereInput = {};
    if (query.status === 'UNPAID' || query.status === 'PAID') where.status = query.status;
    if (query.providerId) where.fulfillmentProviderId = BigInt(query.providerId);
    if (query.year && query.month) {
      const periodStart = new Date(query.year, query.month - 1, 1);
      const periodEnd = new Date(query.year, query.month, 0, 23, 59, 59, 999);
      where.periodStart = { gte: periodStart, lte: periodEnd };
    }
    return where;
  }
}