Add catalog EN/AR translations with AI translate-all by locale.

Store product/category translations in entity_translations, expose CMS APIs, and gate the MultiLanguage Data module for businesses.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/080_entity_translations.sql

@@ -0,0 +1,51 @@
+-- AI / manual catalog translations (EN, AR) for products and categories.
+-- Source text stays on the entity; extra locales live here, one row per entity + locale.
+
+DO $$ BEGIN
+  CREATE TYPE translation_entity_type AS ENUM ('product', 'category');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+DO $$ BEGIN
+  CREATE TYPE translation_locale AS ENUM ('en', 'ar');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+DO $$ BEGIN
+  CREATE TYPE translation_status AS ENUM ('pending', 'ready', 'stale', 'failed');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+CREATE TABLE IF NOT EXISTS entity_translations (
+  id            BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  business_id   BIGINT NOT NULL,
+  entity_type   translation_entity_type NOT NULL,
+  entity_id     BIGINT NOT NULL,
+  locale        translation_locale NOT NULL,
+  fields        JSONB NOT NULL DEFAULT '{}'::jsonb,
+  source_hash   VARCHAR(64) NOT NULL,
+  status        translation_status NOT NULL DEFAULT 'pending',
+  generated_by  VARCHAR(16) NOT NULL DEFAULT 'ai',
+  created_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
+
+  CONSTRAINT entity_translations_business_id_fkey
+    FOREIGN KEY (business_id) REFERENCES businesses (id) ON DELETE CASCADE,
+  CONSTRAINT entity_translations_entity_locale_unique
+    UNIQUE (entity_type, entity_id, locale)
+);
+
+CREATE INDEX IF NOT EXISTS idx_entity_translations_business_id
+  ON entity_translations (business_id);
+
+CREATE INDEX IF NOT EXISTS idx_entity_translations_entity
+  ON entity_translations (entity_type, entity_id);
+
+DROP TRIGGER IF EXISTS entity_translations_set_updated_at ON entity_translations;
+CREATE TRIGGER entity_translations_set_updated_at
+  BEFORE UPDATE ON entity_translations
+  FOR EACH ROW
+  EXECUTE FUNCTION set_updated_at();

docs/PROJECT_CONTEXT.md

@@ -167,6 +167,7 @@ Example super admin: `+989121111111` / `password`
 | `054_seed_iran_provinces_cities.sql` | Seed Iran provinces + cities when missing (004 seed may never have run) |
 | `055_user_products_listing_fields.sql` | User product listing fields: `price_currency`, `delivery_note`, `condition` (`user_product_condition`), `technical_notes` |
 | `058_invoice_user_id.sql` | `invoices.user_id` billed user (backfill from business owner) |
+| `080_entity_translations.sql` | `entity_translations` for product/category EN+AR (AI or manual) |
 
 Docker mounts `./database/migrations` into Postgres init — migrations run automatically only on **first** volume creation. Use `migrate.sh` for subsequent migrations.
 
@@ -179,6 +180,9 @@ Docker mounts `./database/migrations` into Postgres init — migrations run auto
 | Enum | Values |
 |------|--------|
 | `MediaEntityType` | `product`, `blog`, `portfolio`, `customer`, `user_product` |
+| `TranslationEntityType` | `product`, `category` |
+| `TranslationLocale` | `en`, `ar` |
+| `TranslationStatus` | `pending`, `ready`, `stale`, `failed` |
 | `ContentStatus` | `draft`, `published`, `archived` |
 | `VariationType` | `color`, `size`, `custom` |
 | `CityLevel` | `country`, `province`, `city`, `district` |
@@ -325,6 +329,10 @@ Pattern: `/businesses/:businessId/<resource>`
 | GET | `/categories/color-presets` | Predefined color palette |
 | GET/PUT | `/categories/:id/variations` | Category variation options |
 | GET/PUT | `/categories/:id/technical-form` | Technical form definition |
+| POST | `/categories/translations/ai-all` | Generate missing EN+AR for all product categories (skips existing) |
+| GET | `/categories/:id/translations` | EN/AR translations (AI or edited) |
+| POST | `/categories/:id/translations/:locale/ai` | Generate EN or AR with AI |
+| PUT | `/categories/:id/translations/:locale` | Save edited EN or AR text |
 
 #### Products — notable sub-routes
 
@@ -333,6 +341,10 @@ Pattern: `/businesses/:businessId/<resource>`
 | GET/PUT | `/products/:id/variations` | Which category variation options apply to this product |
 | GET/POST/PATCH/DELETE | `/products/:id/variants` | Removed — use `/store-items` |
 | GET/PUT | `/products/:id/technical-info` | Product technical data |
+| POST | `/products/translations/ai-all` | Generate missing EN+AR for all products (skips existing) |
+| GET | `/products/:id/translations` | EN/AR translations (AI or edited) |
+| POST | `/products/:id/translations/:locale/ai` | Generate EN or AR with AI |
+| PUT | `/products/:id/translations/:locale` | Save edited EN or AR text |
 
 #### My user products (customer — JWT, must be business customer)
 
@@ -453,6 +465,7 @@ Each resource typically has: `read`, `create`, `update`, `delete` (+ `publish` f
 - One category per product (via `CategoryAssignment`)
 - Content JSON: `{ nameFa, html }`; metadata JSON: `{ tags }`
 - i18n: Persian name in `content.nameFa`, summary in `description`
+- Extra locales (EN, AR) in `entity_translations` (globe button in business dashboard; AI first, then optional edit)
 
 ### Category variations (product categories)
 

prisma/schema.prisma

@@ -106,6 +106,7 @@ model Business {
   comments                        Comment[]
   contactSubmissions              ContactSubmission[]
   domains                         Domain[]
+  entityTranslations              EntityTranslation[]
   expertReviews                   ExpertReview[]
   favorites                       Favorite[]
   invoiceItemTemplates            InvoiceItemTemplate[]
@@ -1738,3 +1739,46 @@ model WebsitePageViewCounter {
   @@index([businessId, pageKind], map: "idx_website_page_view_counters_business_kind")
   @@map("website_page_view_counters")
 }
+
+model EntityTranslation {
+  id          BigInt                 @id @default(autoincrement())
+  businessId  BigInt                 @map("business_id")
+  entityType  TranslationEntityType  @map("entity_type")
+  entityId    BigInt                 @map("entity_id")
+  locale      TranslationLocale
+  fields      Json                   @default("{}")
+  sourceHash  String                 @map("source_hash") @db.VarChar(64)
+  status      TranslationStatus      @default(pending)
+  generatedBy String                 @default("ai") @map("generated_by") @db.VarChar(16)
+  createdAt   DateTime               @default(now()) @map("created_at") @db.Timestamptz(6)
+  updatedAt   DateTime               @default(now()) @updatedAt @map("updated_at") @db.Timestamptz(6)
+  business    Business               @relation(fields: [businessId], references: [id], onDelete: Cascade, onUpdate: NoAction)
+
+  @@unique([entityType, entityId, locale], map: "entity_translations_entity_locale_unique")
+  @@index([businessId], map: "idx_entity_translations_business_id")
+  @@index([entityType, entityId], map: "idx_entity_translations_entity")
+  @@map("entity_translations")
+}
+
+enum TranslationEntityType {
+  product
+  category
+
+  @@map("translation_entity_type")
+}
+
+enum TranslationLocale {
+  en
+  ar
+
+  @@map("translation_locale")
+}
+
+enum TranslationStatus {
+  pending
+  ready
+  stale
+  failed
+
+  @@map("translation_status")
+}

src/business-settings/business-settings.types.ts

@@ -158,6 +158,7 @@ export const BUSINESS_DASHBOARD_MODULE_IDS = [
   'instructions',
   'workshops',
   'finance',
+  'multilanguage_data',
 ] as const;
 
 /** Optional customer-dashboard modules. Always-on: home, profile, addresses, orders, favorites. */
@@ -254,7 +255,9 @@ export const DEFAULT_NEW_BUSINESS_MODULES: BusinessModuleId[] = [
  * enabled except opt-in modules. Customer modules stay opt-in.
  */
 export const DEFAULT_ENABLED_BUSINESS_MODULES: BusinessModuleId[] =
-  BUSINESS_DASHBOARD_MODULE_IDS.filter((id) => id !== 'workshops');
+  BUSINESS_DASHBOARD_MODULE_IDS.filter(
+    (id) => id !== 'workshops' && id !== 'multilanguage_data',
+  );
 
 export const DEFAULT_HOME_CHARTS: [HomeChartId, HomeChartId] = [
   'orders_30d',

src/categories/categories.controller.ts

@@ -26,6 +26,9 @@ import {
   SuggestCategoryTechnicalFormDto,
 } from './dto/category-technical-form.dto';
 import { ReplaceCategoryVariationsDto } from './dto/category-variation.dto';
+import { TranslationEntityType } from '@prisma/client';
+import { UpsertTranslationDto, TranslateAllDto } from '../translations/dto/translation.dto';
+import { TranslationsService } from '../translations/translations.service';
 import { GenerateCategoriesDto } from './dto/category-ai.dto';
 
 @Controller('businesses/:businessId/categories')
@@ -37,6 +40,7 @@ export class CategoriesController {
     private readonly technicalFormService: CategoryTechnicalFormService,
     private readonly technicalFormAiService: CategoryTechnicalFormAiService,
     private readonly categoryAiService: CategoryAiService,
+    private readonly translations: TranslationsService,
   ) {}
 
   @Get('color-presets')
@@ -65,6 +69,16 @@ export class CategoriesController {
     return this.categoryAiService.generateProductCategories(businessId, dto, user);
   }
 
+  @Post('translations/ai-all')
+  @RequireBusinessPermission('categories.update')
+  translateAllWithAi(
+    @Param('businessId') businessId: string,
+    @Body() dto: TranslateAllDto,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.translateAllCategories(businessId, user, dto.locale);
+  }
+
   @Post()
   @RequireBusinessPermission('categories.create')
   create(
@@ -86,6 +100,57 @@ export class CategoriesController {
     return this.service.update(businessId, categoryId, dto, user);
   }
 
+  @Get(':categoryId/translations')
+  @RequireBusinessPermission('categories.read')
+  listTranslations(
+    @Param('businessId') businessId: string,
+    @Param('categoryId') categoryId: string,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.list(
+      businessId,
+      TranslationEntityType.category,
+      categoryId,
+      user,
+    );
+  }
+
+  @Post(':categoryId/translations/:locale/ai')
+  @RequireBusinessPermission('categories.update')
+  translateWithAi(
+    @Param('businessId') businessId: string,
+    @Param('categoryId') categoryId: string,
+    @Param('locale') locale: string,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.translateWithAi(
+      businessId,
+      TranslationEntityType.category,
+      categoryId,
+      locale,
+      user,
+    );
+  }
+
+  @Put(':categoryId/translations/:locale')
+  @RequireBusinessPermission('categories.update')
+  saveTranslation(
+    @Param('businessId') businessId: string,
+    @Param('categoryId') categoryId: string,
+    @Param('locale') locale: string,
+    @Body() dto: UpsertTranslationDto,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.save(
+      businessId,
+      TranslationEntityType.category,
+      categoryId,
+      locale,
+      dto,
+      user,
+    );
+  }
+
   @Get(':categoryId/variations')
   @RequireBusinessPermission('categories.read')
   listVariations(

src/categories/categories.module.ts

@@ -2,6 +2,7 @@ import { Module } from '@nestjs/common';
 import { AuthModule } from '../auth/auth.module';
 import { SitemapModule } from '../sitemap/sitemap.module';
 import { TenantModule } from '../tenant/tenant.module';
+import { TranslationsModule } from '../translations/translations.module';
 import { CategoriesController, PublicCategoriesController } from './categories.controller';
 import { CategoriesService } from './categories.service';
 import { CategoryTechnicalFormAiService } from './category-technical-form-ai.service';
@@ -10,7 +11,7 @@ import { CategoryTechnicalFormService } from './category-technical-form.service'
 import { CategoryVariationsService } from './category-variations.service';
 
 @Module({
-  imports: [AuthModule, SitemapModule, TenantModule],
+  imports: [AuthModule, SitemapModule, TenantModule, TranslationsModule],
   controllers: [CategoriesController, PublicCategoriesController],
   providers: [
     CategoriesService,

src/categories/categories.service.ts

@@ -4,7 +4,11 @@ import {
   Injectable,
   NotFoundException,
 } from '@nestjs/common';
-import { MediaEntityType } from '@prisma/client';
+import {
+  MediaEntityType,
+  TranslationEntityType,
+  TranslationStatus,
+} from '@prisma/client';
 import { AuthUser } from '../auth/auth.types';
 import { PermissionsService } from '../auth/permissions.service';
 import { PrismaService } from '../prisma/prisma.service';
@@ -45,9 +49,18 @@ export class CategoriesService {
       },
     });
 
+    const translationCounts = await this.translationCounts(
+      businessId,
+      items.map((item) => item.id),
+    );
+
     return {
       items: items.map((item) =>
-        this.serialize(item, item._count.variations),
+        this.serialize(
+          item,
+          item._count.variations,
+          translationCounts.get(item.id.toString()) ?? 0,
+        ),
       ),
     };
   }
@@ -252,6 +265,13 @@ export class CategoriesService {
     const descendantIds = await this.collectDescendantIds(categoryId);
 
     await this.prisma.$transaction([
+      this.prisma.entityTranslation.deleteMany({
+        where: {
+          businessId,
+          entityType: TranslationEntityType.category,
+          entityId: { in: descendantIds },
+        },
+      }),
       this.prisma.category.deleteMany({
         where: { id: { in: descendantIds } },
       }),
@@ -338,6 +358,33 @@ export class CategoriesService {
     }
   }
 
+  private async translationCounts(
+    businessId: bigint,
+    categoryIds: bigint[],
+  ): Promise<Map<string, number>> {
+    const map = new Map<string, number>();
+    if (categoryIds.length === 0) {
+      return map;
+    }
+
+    const grouped = await this.prisma.entityTranslation.groupBy({
+      by: ['entityId'],
+      where: {
+        businessId,
+        entityType: TranslationEntityType.category,
+        entityId: { in: categoryIds },
+        status: { in: [TranslationStatus.ready, TranslationStatus.stale] },
+      },
+      _count: { entityId: true },
+    });
+
+    for (const row of grouped) {
+      map.set(row.entityId.toString(), row._count.entityId);
+    }
+
+    return map;
+  }
+
   private serialize(
     category: {
       id: bigint;
@@ -354,6 +401,7 @@ export class CategoriesService {
       updatedAt: Date;
     },
     variationCount = 0,
+    translationCount?: number,
   ) {
     return {
       id: category.id.toString(),
@@ -367,6 +415,7 @@ export class CategoriesService {
       sortOrder: category.sortOrder,
       isActive: category.isActive,
       variationCount,
+      ...(translationCount !== undefined ? { translationCount } : {}),
       createdAt: category.createdAt,
       updatedAt: category.updatedAt,
     };

src/products/products.controller.ts

@@ -17,6 +17,9 @@ import { BusinessPermissionGuard } from '../auth/guards/business-permission.guar
 import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
 import { WebsiteAnalyticsService } from '../website-analytics/website-analytics.service';
 import { CreateProductByAiDto, FillProductFieldByAiDto } from './dto/product-ai.dto';
+import { TranslationEntityType } from '@prisma/client';
+import { UpsertTranslationDto, TranslateAllDto } from '../translations/dto/translation.dto';
+import { TranslationsService } from '../translations/translations.service';
 import { CreateProductDto, ListProductsDto, ListPublicProductsDto, UpdateProductDto } from './dto/product.dto';
 import { ReplaceProductVariationValuesDto } from './dto/product-variation-values.dto';
 import { ReplaceProductTechnicalInfoDto } from './dto/product-technical-info.dto';
@@ -33,6 +36,7 @@ export class ProductsController {
     private readonly aiService: ProductAiService,
     private readonly variationValuesService: ProductVariationValuesService,
     private readonly technicalInfoService: ProductTechnicalInfoService,
+    private readonly translations: TranslationsService,
   ) {}
 
   @Get()
@@ -65,6 +69,67 @@ export class ProductsController {
     return this.aiService.fillField(businessId, dto, user);
   }
 
+  @Post('translations/ai-all')
+  @RequireBusinessPermission('products.update')
+  translateAllWithAi(
+    @Param('businessId') businessId: string,
+    @Body() dto: TranslateAllDto,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.translateAllProducts(businessId, user, dto.locale);
+  }
+
+  @Get(':productId/translations')
+  @RequireBusinessPermission('products.read')
+  listTranslations(
+    @Param('businessId') businessId: string,
+    @Param('productId') productId: string,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.list(
+      businessId,
+      TranslationEntityType.product,
+      productId,
+      user,
+    );
+  }
+
+  @Post(':productId/translations/:locale/ai')
+  @RequireBusinessPermission('products.update')
+  translateWithAi(
+    @Param('businessId') businessId: string,
+    @Param('productId') productId: string,
+    @Param('locale') locale: string,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.translateWithAi(
+      businessId,
+      TranslationEntityType.product,
+      productId,
+      locale,
+      user,
+    );
+  }
+
+  @Put(':productId/translations/:locale')
+  @RequireBusinessPermission('products.update')
+  saveTranslation(
+    @Param('businessId') businessId: string,
+    @Param('productId') productId: string,
+    @Param('locale') locale: string,
+    @Body() dto: UpsertTranslationDto,
+    @CurrentUser() user: AuthUser,
+  ) {
+    return this.translations.save(
+      businessId,
+      TranslationEntityType.product,
+      productId,
+      locale,
+      dto,
+      user,
+    );
+  }
+
   @Get(':productId')
   @RequireBusinessPermission('products.read')
   getOne(

src/products/products.module.ts

@@ -5,6 +5,7 @@ import { CategoriesModule } from '../categories/categories.module';
 import { MediaModule } from '../media/media.module';
 import { SitemapModule } from '../sitemap/sitemap.module';
 import { TenantModule } from '../tenant/tenant.module';
+import { TranslationsModule } from '../translations/translations.module';
 import { WebsiteAnalyticsModule } from '../website-analytics/website-analytics.module';
 import { ProductAiService } from './product-ai.service';
 import { ProductTechnicalInfoService } from './product-technical-info.service';
@@ -20,6 +21,7 @@ import { ProductsService } from './products.service';
     MediaModule,
     SitemapModule,
     TenantModule,
+    TranslationsModule,
     WebsiteAnalyticsModule,
   ],
   controllers: [ProductsController, PublicProductsController],

src/products/products.service.ts

@@ -4,7 +4,13 @@ import {
   Injectable,
   NotFoundException,
 } from '@nestjs/common';
-import { ContentStatus, MediaEntityType, Prisma } from '@prisma/client';
+import {
+  ContentStatus,
+  MediaEntityType,
+  Prisma,
+  TranslationEntityType,
+  TranslationStatus,
+} from '@prisma/client';
 import { AuthUser } from '../auth/auth.types';
 import { PermissionsService } from '../auth/permissions.service';
 import { BrandsService } from '../brands/brands.service';
@@ -98,14 +104,20 @@ export class ProductsService {
       this.prisma.product.count({ where }),
     ]);
 
-    const variantCounts = await this.productVariationValues.countForProducts(
+    const productIds = items.map((item) => item.id);
-      businessId,
+    const [variantCounts, translationCounts] = await Promise.all([
-      items.map((item) => item.id),
+      this.productVariationValues.countForProducts(businessId, productIds),
-    );
+      this.translationCounts(businessId, productIds),
+    ]);
 
     const serialized = await Promise.all(
       items.map((item) =>
-        this.serializeProduct(item, variantCounts.get(item.id.toString()) ?? 0),
+        this.serializeProduct(
+          item,
+          variantCounts.get(item.id.toString()) ?? 0,
+          {},
+          translationCounts.get(item.id.toString()) ?? 0,
+        ),
       ),
     );
 
@@ -519,6 +531,13 @@ export class ProductsService {
           entityId: productId,
         },
       }),
+      this.prisma.entityTranslation.deleteMany({
+        where: {
+          businessId,
+          entityType: TranslationEntityType.product,
+          entityId: productId,
+        },
+      }),
       this.prisma.product.delete({ where: { id: productId } }),
     ]);
 
@@ -528,10 +547,38 @@ export class ProductsService {
     return { message: 'Product deleted successfully' };
   }
 
+  private async translationCounts(
+    businessId: bigint,
+    productIds: bigint[],
+  ): Promise<Map<string, number>> {
+    const map = new Map<string, number>();
+    if (productIds.length === 0) {
+      return map;
+    }
+
+    const grouped = await this.prisma.entityTranslation.groupBy({
+      by: ['entityId'],
+      where: {
+        businessId,
+        entityType: TranslationEntityType.product,
+        entityId: { in: productIds },
+        status: { in: [TranslationStatus.ready, TranslationStatus.stale] },
+      },
+      _count: { entityId: true },
+    });
+
+    for (const row of grouped) {
+      map.set(row.entityId.toString(), row._count.entityId);
+    }
+
+    return map;
+  }
+
   private async serializeProduct(
     product: ProductWithRelations,
     variantCount?: number,
     options: { approvedCommentsOnly?: boolean } = {},
+    translationCount?: number,
   ) {
     const content = this.asRecord(product.content);
     const metadata = this.asRecord(product.metadata);
@@ -604,6 +651,7 @@ export class ProductsService {
       galleryMediaIds: galleryAttachments.map((item) => item.mediaId.toString()),
       commentCount,
       variantCount: resolvedVariantCount,
+      ...(translationCount !== undefined ? { translationCount } : {}),
       visitCount: product.visitCount.toString(),
       cartAddCount: product.cartAddCount.toString(),
       saleCount: product.saleCount.toString(),

src/translations/dto/translation.dto.ts

@@ -0,0 +1,36 @@
+import { Type } from 'class-transformer';
+import { IsIn, IsObject, IsOptional, IsString, ValidateNested } from 'class-validator';
+
+export class TranslationFieldsDto {
+  @IsOptional()
+  @IsString()
+  name?: string;
+
+  @IsOptional()
+  @IsString()
+  description?: string;
+
+  @IsOptional()
+  @IsString()
+  title?: string;
+
+  @IsOptional()
+  @IsString()
+  summary?: string;
+
+  @IsOptional()
+  @IsString()
+  descriptionHtml?: string;
+}
+
+export class UpsertTranslationDto {
+  @IsObject()
+  @ValidateNested()
+  @Type(() => TranslationFieldsDto)
+  fields!: TranslationFieldsDto;
+}
+
+export class TranslateAllDto {
+  @IsIn(['en', 'ar'])
+  locale!: 'en' | 'ar';
+}

src/translations/translations.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { AuthModule } from '../auth/auth.module';
+import { TranslationsService } from './translations.service';
+
+@Module({
+  imports: [AuthModule],
+  providers: [TranslationsService],
+  exports: [TranslationsService],
+})
+export class TranslationsModule {}

src/translations/translations.service.ts

@@ -0,0 +1,553 @@
+import {
+  BadRequestException,
+  ForbiddenException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import {
+  MediaEntityType,
+  Prisma,
+  TranslationEntityType,
+  TranslationLocale,
+  TranslationStatus,
+} from '@prisma/client';
+import { createHash } from 'crypto';
+import { AuthUser } from '../auth/auth.types';
+import { PermissionsService } from '../auth/permissions.service';
+import {
+  requestAiJsonCompletion,
+  resolveAiProvider,
+} from '../common/ai-provider.util';
+import { PrismaService } from '../prisma/prisma.service';
+import { TranslationFieldsDto } from './dto/translation.dto';
+
+type CategorySource = {
+  name: string;
+  description: string;
+};
+
+type ProductSource = {
+  title: string;
+  summary: string;
+  descriptionHtml: string;
+};
+
+type SourceFields = CategorySource | ProductSource;
+
+@Injectable()
+export class TranslationsService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly permissions: PermissionsService,
+    private readonly config: ConfigService,
+  ) {}
+
+  parseLocale(raw: string): TranslationLocale {
+    if (raw === TranslationLocale.en || raw === TranslationLocale.ar) {
+      return raw;
+    }
+    throw new BadRequestException('locale must be en or ar');
+  }
+
+  async list(
+    businessIdRaw: string,
+    entityType: TranslationEntityType,
+    entityIdRaw: string,
+    actor: AuthUser,
+  ) {
+    const businessId = BigInt(businessIdRaw);
+    const entityId = BigInt(entityIdRaw);
+    await this.assertPermission(businessId, actor.id, this.readPermission(entityType));
+    await this.loadSource(businessId, entityType, entityId);
+
+    const rows = await this.prisma.entityTranslation.findMany({
+      where: { businessId, entityType, entityId },
+      orderBy: { locale: 'asc' },
+    });
+
+    return {
+      entityType,
+      entityId: entityId.toString(),
+      items: rows.map((row) => this.serialize(row)),
+    };
+  }
+
+  async translateWithAi(
+    businessIdRaw: string,
+    entityType: TranslationEntityType,
+    entityIdRaw: string,
+    localeRaw: string,
+    actor: AuthUser,
+  ) {
+    const businessId = BigInt(businessIdRaw);
+    const entityId = BigInt(entityIdRaw);
+    const locale = this.parseLocale(localeRaw);
+    await this.assertPermission(businessId, actor.id, this.updatePermission(entityType));
+
+    const source = await this.loadSource(businessId, entityType, entityId);
+    if (!this.hasTranslatableText(source)) {
+      throw new BadRequestException(
+        'Add a name in the original language before translating',
+      );
+    }
+
+    const fields = await this.requestTranslation(entityType, locale, source);
+    const row = await this.upsertRow({
+      businessId,
+      entityType,
+      entityId,
+      locale,
+      fields,
+      sourceHash: hashSource(source),
+      generatedBy: 'ai',
+    });
+
+    return {
+      message: 'Translation generated',
+      translation: this.serialize(row),
+    };
+  }
+
+  async translateAllCategories(
+    businessIdRaw: string,
+    actor: AuthUser,
+    localeRaw: string,
+  ) {
+    const businessId = BigInt(businessIdRaw);
+    await this.assertPermission(businessId, actor.id, 'categories.update');
+
+    const locale = this.parseLocale(localeRaw);
+    const locales = [locale];
+    const categories = await this.prisma.category.findMany({
+      where: {
+        businessId,
+        entityType: MediaEntityType.product,
+        isActive: true,
+      },
+      select: { id: true },
+    });
+
+    const ids = categories.map((category) => category.id);
+    const existing =
+      ids.length === 0
+        ? []
+        : await this.prisma.entityTranslation.findMany({
+            where: {
+              businessId,
+              entityType: TranslationEntityType.category,
+              entityId: { in: ids },
+              locale: { in: locales },
+              status: { in: [TranslationStatus.ready, TranslationStatus.stale] },
+            },
+            select: { entityId: true, locale: true },
+          });
+
+    const have = new Set(
+      existing.map((row) => `${row.entityId.toString()}:${row.locale}`),
+    );
+
+    let translated = 0;
+    let skipped = 0;
+    let failed = 0;
+
+    for (const category of categories) {
+      let source: SourceFields;
+      try {
+        source = await this.loadSource(
+          businessId,
+          TranslationEntityType.category,
+          category.id,
+        );
+      } catch {
+        failed += locales.length;
+        continue;
+      }
+
+      if (!this.hasTranslatableText(source)) {
+        skipped += locales.length;
+        continue;
+      }
+
+      const sourceHash = hashSource(source);
+
+      for (const targetLocale of locales) {
+        if (have.has(`${category.id.toString()}:${targetLocale}`)) {
+          skipped += 1;
+          continue;
+        }
+
+        try {
+          const fields = await this.requestTranslation(
+            TranslationEntityType.category,
+            targetLocale,
+            source,
+          );
+          await this.upsertRow({
+            businessId,
+            entityType: TranslationEntityType.category,
+            entityId: category.id,
+            locale: targetLocale,
+            fields,
+            sourceHash,
+            generatedBy: 'ai',
+          });
+          translated += 1;
+        } catch {
+          failed += 1;
+        }
+      }
+    }
+
+    return {
+      message: 'Category translations generated',
+      locale,
+      translated,
+      skipped,
+      failed,
+    };
+  }
+
+  async translateAllProducts(
+    businessIdRaw: string,
+    actor: AuthUser,
+    localeRaw: string,
+  ) {
+    const businessId = BigInt(businessIdRaw);
+    await this.assertPermission(businessId, actor.id, 'products.update');
+
+    const locale = this.parseLocale(localeRaw);
+    const locales = [locale];
+    const products = await this.prisma.product.findMany({
+      where: { businessId },
+      select: { id: true },
+    });
+
+    const ids = products.map((product) => product.id);
+    const existing =
+      ids.length === 0
+        ? []
+        : await this.prisma.entityTranslation.findMany({
+            where: {
+              businessId,
+              entityType: TranslationEntityType.product,
+              entityId: { in: ids },
+              locale: { in: locales },
+              status: { in: [TranslationStatus.ready, TranslationStatus.stale] },
+            },
+            select: { entityId: true, locale: true },
+          });
+
+    const have = new Set(
+      existing.map((row) => `${row.entityId.toString()}:${row.locale}`),
+    );
+
+    let translated = 0;
+    let skipped = 0;
+    let failed = 0;
+
+    for (const product of products) {
+      let source: SourceFields;
+      try {
+        source = await this.loadSource(
+          businessId,
+          TranslationEntityType.product,
+          product.id,
+        );
+      } catch {
+        failed += locales.length;
+        continue;
+      }
+
+      if (!this.hasTranslatableText(source)) {
+        skipped += locales.length;
+        continue;
+      }
+
+      const sourceHash = hashSource(source);
+
+      for (const targetLocale of locales) {
+        if (have.has(`${product.id.toString()}:${targetLocale}`)) {
+          skipped += 1;
+          continue;
+        }
+
+        try {
+          const fields = await this.requestTranslation(
+            TranslationEntityType.product,
+            targetLocale,
+            source,
+          );
+          await this.upsertRow({
+            businessId,
+            entityType: TranslationEntityType.product,
+            entityId: product.id,
+            locale: targetLocale,
+            fields,
+            sourceHash,
+            generatedBy: 'ai',
+          });
+          translated += 1;
+        } catch {
+          failed += 1;
+        }
+      }
+    }
+
+    return {
+      message: 'Product translations generated',
+      locale,
+      translated,
+      skipped,
+      failed,
+    };
+  }
+
+  async save(
+    businessIdRaw: string,
+    entityType: TranslationEntityType,
+    entityIdRaw: string,
+    localeRaw: string,
+    dto: { fields: TranslationFieldsDto },
+    actor: AuthUser,
+  ) {
+    const businessId = BigInt(businessIdRaw);
+    const entityId = BigInt(entityIdRaw);
+    const locale = this.parseLocale(localeRaw);
+    await this.assertPermission(businessId, actor.id, this.updatePermission(entityType));
+
+    const source = await this.loadSource(businessId, entityType, entityId);
+    const fields = this.normalizeFields(entityType, dto.fields);
+    this.assertRequiredName(entityType, fields);
+
+    const row = await this.upsertRow({
+      businessId,
+      entityType,
+      entityId,
+      locale,
+      fields,
+      sourceHash: hashSource(source),
+      generatedBy: 'manual',
+    });
+
+    return {
+      message: 'Translation saved',
+      translation: this.serialize(row),
+    };
+  }
+
+  private async requestTranslation(
+    entityType: TranslationEntityType,
+    locale: TranslationLocale,
+    source: SourceFields,
+  ): Promise<Record<string, string>> {
+    const provider = resolveAiProvider(this.config);
+    const targetLanguage =
+      locale === TranslationLocale.ar ? 'Arabic' : 'English';
+    const fieldKeys =
+      entityType === TranslationEntityType.category
+        ? '"name", "description"'
+        : '"title", "summary", "descriptionHtml"';
+
+    const systemPrompt = `You translate Iranian e-commerce catalog content from Persian (Farsi) or mixed Persian/English into ${targetLanguage}.
+Return ONLY valid JSON with exactly these keys: { ${fieldKeys} }
+Keep brand names, model numbers, SKUs, and measurement units unchanged.
+Do not add marketing fluff or extra sentences.
+If a source field is empty, return an empty string for that key.
+For descriptionHtml, keep the same HTML tags (p, ul, ol, li, strong, em, br) and translate text nodes only. Do not wrap in html/body/div.`;
+
+    const userPrompt = JSON.stringify({
+      targetLocale: locale,
+      targetLanguage,
+      entityType,
+      source,
+    });
+
+    let content: string;
+    try {
+      content = await requestAiJsonCompletion(provider, systemPrompt, userPrompt, 0.2);
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'AI request failed';
+      throw new BadRequestException(message);
+    }
+
+    let parsed: Record<string, unknown>;
+    try {
+      parsed = JSON.parse(content) as Record<string, unknown>;
+    } catch {
+      throw new BadRequestException('AI returned invalid JSON');
+    }
+
+    const fields = this.normalizeFields(entityType, parsed);
+    this.assertRequiredName(entityType, fields);
+    return fields;
+  }
+
+  private async loadSource(
+    businessId: bigint,
+    entityType: TranslationEntityType,
+    entityId: bigint,
+  ): Promise<SourceFields> {
+    if (entityType === TranslationEntityType.category) {
+      const category = await this.prisma.category.findFirst({
+        where: { id: entityId, businessId },
+        select: { name: true, nameFa: true, description: true },
+      });
+      if (!category) {
+        throw new NotFoundException('Category not found');
+      }
+      return {
+        name: (category.nameFa?.trim() || category.name).trim(),
+        description: category.description?.trim() || '',
+      };
+    }
+
+    const product = await this.prisma.product.findFirst({
+      where: { id: entityId, businessId },
+      select: { title: true, description: true, content: true },
+    });
+    if (!product) {
+      throw new NotFoundException('Product not found');
+    }
+
+    const content = asRecord(product.content);
+    const nameFa =
+      typeof content.nameFa === 'string' ? content.nameFa.trim() : '';
+    const html = typeof content.html === 'string' ? content.html.trim() : '';
+
+    return {
+      title: nameFa || product.title.trim(),
+      summary: product.description?.trim() || '',
+      descriptionHtml: html,
+    };
+  }
+
+  private normalizeFields(
+    entityType: TranslationEntityType,
+    raw: Record<string, unknown> | TranslationFieldsDto,
+  ): Record<string, string> {
+    if (entityType === TranslationEntityType.category) {
+      return {
+        name: String(raw.name ?? '').trim(),
+        description: String(raw.description ?? '').trim(),
+      };
+    }
+
+    return {
+      title: String(raw.title ?? '').trim(),
+      summary: String(raw.summary ?? '').trim(),
+      descriptionHtml: String(raw.descriptionHtml ?? '').trim(),
+    };
+  }
+
+  private assertRequiredName(
+    entityType: TranslationEntityType,
+    fields: Record<string, string>,
+  ) {
+    const name =
+      entityType === TranslationEntityType.category ? fields.name : fields.title;
+    if (!name) {
+      throw new BadRequestException('Translated name is required');
+    }
+  }
+
+  private hasTranslatableText(source: SourceFields): boolean {
+    if ('name' in source) {
+      return Boolean(source.name);
+    }
+    return Boolean(source.title);
+  }
+
+  private async upsertRow(input: {
+    businessId: bigint;
+    entityType: TranslationEntityType;
+    entityId: bigint;
+    locale: TranslationLocale;
+    fields: Record<string, string>;
+    sourceHash: string;
+    generatedBy: string;
+  }) {
+    return this.prisma.entityTranslation.upsert({
+      where: {
+        entityType_entityId_locale: {
+          entityType: input.entityType,
+          entityId: input.entityId,
+          locale: input.locale,
+        },
+      },
+      create: {
+        businessId: input.businessId,
+        entityType: input.entityType,
+        entityId: input.entityId,
+        locale: input.locale,
+        fields: input.fields,
+        sourceHash: input.sourceHash,
+        status: TranslationStatus.ready,
+        generatedBy: input.generatedBy,
+      },
+      update: {
+        fields: input.fields,
+        sourceHash: input.sourceHash,
+        status: TranslationStatus.ready,
+        generatedBy: input.generatedBy,
+      },
+    });
+  }
+
+  private serialize(row: {
+    locale: TranslationLocale;
+    fields: Prisma.JsonValue;
+    status: TranslationStatus;
+    generatedBy: string;
+    updatedAt: Date;
+  }) {
+    const fields = asRecord(row.fields);
+    return {
+      locale: row.locale,
+      status: row.status,
+      fields,
+      generatedBy: row.generatedBy,
+      updatedAt: row.updatedAt,
+    };
+  }
+
+  private readPermission(entityType: TranslationEntityType) {
+    return entityType === TranslationEntityType.product
+      ? 'products.read'
+      : 'categories.read';
+  }
+
+  private updatePermission(entityType: TranslationEntityType) {
+    return entityType === TranslationEntityType.product
+      ? 'products.update'
+      : 'categories.update';
+  }
+
+  private async assertPermission(
+    businessId: bigint,
+    userId: bigint,
+    permission: string,
+  ) {
+    const allowed = await this.permissions.hasBusinessPermission(
+      userId,
+      businessId,
+      permission,
+    );
+    if (!allowed) {
+      throw new ForbiddenException(
+        `Missing permission: ${permission} for this business`,
+      );
+    }
+  }
+}
+
+function hashSource(source: SourceFields): string {
+  return createHash('sha256').update(JSON.stringify(source)).digest('hex');
+}
+
+function asRecord(value: Prisma.JsonValue): Record<string, unknown> {
+  if (value && typeof value === 'object' && !Array.isArray(value)) {
+    return value as Record<string, unknown>;
+  }
+  return {};
+}