import { Injectable } from '@nestjs/common';
import { PrismaService } from '../../common/prisma/prisma.module';

@Injectable()
export class AdminDashboardService {
  constructor(private readonly prisma: PrismaService) {}

  async getStats() {
    const todayStart = new Date();
    todayStart.setHours(0, 0, 0, 0);

    const [
      usersTotal,
      guestUsers,
      verifiedUsers,
      mergedUsers,
      ordersToday,
      ordersByStatus,
      storesTotal,
      partnersTotal,
      redeemToday,
      deliveriesTotal,
      pendingPayouts,
      pendingBills,
      pendingPartnerDraftBills,
      openTickets,
    ] = await Promise.all([
      this.prisma.user.count({ where: { status: 1, mergedIntoUserId: null } }),
      this.prisma.user.count({
        where: { status: 1, mergedIntoUserId: null, phoneVerifiedAt: null },
      }),
      this.prisma.user.count({
        where: { status: 1, mergedIntoUserId: null, phoneVerifiedAt: { not: null } },
      }),
      this.prisma.user.count({ where: { mergedIntoUserId: { not: null } } }),
      this.prisma.order.count({ where: { createdAt: { gte: todayStart } } }),
      this.prisma.order.groupBy({
        by: ['status'],
        _count: { status: true },
      }),
      this.prisma.store.count(),
      this.prisma.partnerAccount.count({ where: { isPrimary: 1 } }),
      this.prisma.redeemRecord.count({ where: { createdAt: { gte: todayStart } } }),
      this.prisma.orderDelivery.count(),
      this.prisma.storePayout.count({ where: { status: 'PENDING' } }),
      this.prisma.partnerBill.count({ where: { status: 'UNPAID' } }),
      this.prisma.partnerBill.count({ where: { status: 'PENDING_REVIEW' } }),
      this.prisma.commonTicket.count({ where: { status: { in: ['PENDING', 'OPEN'] } } }),
    ]);

    return {
      usersTotal,
      guestUsers,
      verifiedUsers,
      mergedUsers,
      ordersToday,
      storesTotal,
      partnersTotal,
      redeemToday,
      deliveriesTotal,
      pendingPayouts,
      /** 合伙人已确认、待总部审核打款 */
      pendingBills,
      pendingPartnerDraftBills,
      openTickets,
      ordersByStatus: ordersByStatus.map((row) => ({
        status: row.status,
        count: row._count.status,
      })),
    };
  }

  async getLatestVersion() {
    const row = await this.prisma.systemVersion.findFirst({
      orderBy: { deployedAt: 'desc' },
    });
    if (!row) return null;
    return {
      id: row.id.toString(),
      gitTag: row.gitTag,
      commitId: row.commitId,
      commitMessage: row.commitMessage,
      branch: row.branch,
      deployedBy: row.deployedBy,
      deployedAt: row.deployedAt.toISOString(),
    };
  }
}