import { Injectable } from '@nestjs/common';
import { PrismaService } from '../../common/prisma/prisma.module';
import { serializeBigInt } from '../../common/decorators/current-user.decorator';

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

  async listCities() {
    const cities = await this.prisma.city.findMany({
      where: { status: 'ACTIVE' },
      include: { partner: { select: { companyName: true } } },
    });
    return serializeBigInt(cities);
  }

  async listProducts(aromaType?: string) {
    const products = await this.prisma.product.findMany({
      where: { status: 'ON_SALE', ...(aromaType ? { aromaType: aromaType as never } : {}) },
      orderBy: { sortOrder: 'asc' },
    });
    return serializeBigInt(
      products.map((p) => ({
        ...p,
        benefitAmount: p.benefitAmount ?? p.price,
        price: Number(p.price),
        benefitDisplay: Number(p.benefitAmount ?? p.price),
      })),
    );
  }

  async getProduct(id: bigint) {
    const product = await this.prisma.product.findUnique({ where: { id } });
    if (!product) return null;
    return serializeBigInt({
      ...product,
      benefitAmount: product.benefitAmount ?? product.price,
      price: Number(product.price),
    });
  }
}