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,
    ] = 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.partner.count(),
      this.prisma.redeemRecord.count({ where: { createdAt: { gte: todayStart } } }),
      this.prisma.orderDelivery.count(),
    ]);

    return {
      usersTotal,
      guestUsers,
      verifiedUsers,
      mergedUsers,
      ordersToday,
      storesTotal,
      partnersTotal,
      redeemToday,
      deliveriesTotal,
      ordersByStatus: ordersByStatus.map((row) => ({
        status: row.status,
        count: row._count.status,
      })),
    };
  }
}