tehran_tala/apps/api/src/modules/catalog/catalog.service.ts

import { Injectable, NotFoundException } from '@nestjs/common';
import { PrismaService } from '../../prisma/prisma.service';

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

  listProducts() {
    return this.prisma.product.findMany({
      where: { isActive: true },
      include: {
        // Only orderable variants reach the storefront. An inactive one used to
        // be listed and then rejected by getVariantOrThrow at checkout, so the
        // customer could pick a chip and get a 404 on the order.
        variants: {
          where: { isActive: true },
          // Each variant carries its own gallery picture, so the app can render
          // the chip without a second request per variant.
          include: { image: true },
        },
        // Explicit order: the UI treats images[0] as the product's main photo,
        // which is only meaningful if the rows come back sorted.
        images: { orderBy: { sortOrder: 'asc' } },
        category: true,
        brand: true,
        collections: { include: { collection: true } },
      },
    });
  }

  async getVariantOrThrow(variantId: string) {
    const variant = await this.prisma.productVariant.findUnique({ where: { id: variantId } });
    if (!variant || !variant.isActive) {
      throw new NotFoundException(`Product variant ${variantId} not found or inactive`);
    }
    return variant;
  }
}