feat(cart): refactor cart item structure and update related components for consistency

src/app/core/layout/store-layout/store-layout.component.ts

@@ -2,7 +2,11 @@ import { Component, computed, inject, OnInit, signal } from '@angular/core';
 import { Router, RouterOutlet } from '@angular/router';
 import { TenantService } from '../../services/tenant.service';
 import { CartService } from '../../services/cart/cart.service';
-import { StoreFooterComponent, StoreFooterSection, StoreSocialLink } from './store-footer/store-footer.component';
+import {
+  StoreFooterComponent,
+  StoreFooterSection,
+  StoreSocialLink,
+} from './store-footer/store-footer.component';
 import { StoreHeaderComponent } from './store-header/store-header.component';
 import { CartComponent, CartItemMock } from '../../../shared/components/cart/cart.component';
 import { ButtonComponent } from '../../../shared/components/button/button.component';
@@ -11,9 +15,15 @@ import { AuthService } from '../../services/auth/auth.service';
 
 @Component({
   selector: 'app-store-layout',
-  imports: [RouterOutlet, StoreHeaderComponent, StoreFooterComponent, CartComponent, ButtonComponent],
+  imports: [
+    RouterOutlet,
+    StoreHeaderComponent,
+    StoreFooterComponent,
+    CartComponent,
+    ButtonComponent,
+  ],
   templateUrl: './store-layout.component.html',
-  styleUrl: './store-layout.component.scss'
+  styleUrl: './store-layout.component.scss',
 })
 export class StoreLayoutComponent implements OnInit {
   private readonly tenantService = inject(TenantService);
@@ -57,14 +67,14 @@ export class StoreLayoutComponent implements OnInit {
     }
 
     return {
-      productVariantId: item.product_variant_id,
+      cartItemId: item.id,
       imageUrl: item.product?.imagen ?? null,
       product,
       originalPrice: null,
       discountedPrice: parseFloat(item.precio_unitario),
       discountPercentage: null,
       attributes,
-      quantity: item.cantidad
+      quantity: item.cantidad,
     };
   }
 
@@ -81,7 +91,7 @@ export class StoreLayoutComponent implements OnInit {
 
   ngOnInit(): void {
     this.cartService.loadCart().subscribe({
-      error: (err) => console.error('Error loading cart', err)
+      error: (err) => console.error('Error loading cart', err),
     });
   }
 
@@ -92,7 +102,7 @@ export class StoreLayoutComponent implements OnInit {
   protected onLogoutClick(): void {
     this.authService.logout().subscribe({
       next: () => void this.router.navigate(['/login']),
-      error: (err) => console.error('Error logging out', err)
+      error: (err) => console.error('Error logging out', err),
     });
   }
 
@@ -101,34 +111,33 @@ export class StoreLayoutComponent implements OnInit {
     void this.router.navigate(['/checkout']);
   }
 
-
   protected readonly footerSections: StoreFooterSection[] = [
     {
       heading: 'Cuenta',
-      links: ['Mi cuenta', 'Mis compras', 'Cerrar sesion']
+      links: ['Mi cuenta', 'Mis compras', 'Cerrar sesion'],
     },
     {
       heading: 'Ayuda',
-      links: ['Contacto', 'Ayuda', 'Preguntas frecuentes']
+      links: ['Contacto', 'Ayuda', 'Preguntas frecuentes'],
-    }
+    },
   ];
 
   protected readonly socialLinks: StoreSocialLink[] = [
     {
       label: 'Instagram',
-      iconClass: 'fa-brands fa-instagram'
+      iconClass: 'fa-brands fa-instagram',
     },
     {
       label: 'WhatsApp',
-      iconClass: 'fa-brands fa-whatsapp'
+      iconClass: 'fa-brands fa-whatsapp',
     },
     {
       label: 'Facebook',
-      iconClass: 'fa-brands fa-facebook'
+      iconClass: 'fa-brands fa-facebook',
     },
     {
       label: 'LinkedIn',
-      iconClass: 'fa-brands fa-linkedin-in'
+      iconClass: 'fa-brands fa-linkedin-in',
-    }
+    },
   ];
 }

src/app/core/services/cart/cart.interface.ts

@@ -3,12 +3,14 @@ export interface CartItemProduct {
   imagen: string | null;
 }
 
+export type BuyableType = 'variant' | 'bundle';
+
 export interface CartItem {
   id: number;
   cantidad: number;
   precio_unitario: string;
-  product_id: number;
+  buyable_type: BuyableType;
-  product_variant_id: number;
+  buyable_id: number;
   product: CartItemProduct | null;
 }
 

src/app/core/services/cart/cart.service.spec.ts

@@ -21,21 +21,21 @@ describe('CartService', () => {
         id: 1,
         cantidad: 2,
         precio_unitario: '10.00',
-        product_id: 5,
+        buyable_type: 'variant',
-        product_variant_id: 10,
+        buyable_id: 10,
         product: {
           nombre: 'Test Product (Size: M)',
-          imagen: null
+          imagen: null,
-        }
+        },
-      }
+      },
     ],
-    subtotal: '20.00'
+    subtotal: '20.00',
   };
 
   beforeEach(() => {
     tenantServiceMock = {
       getTenantApiUrl: vi.fn().mockReturnValue('http://api.test/tenants/acme'),
-      tenant: vi.fn().mockReturnValue({ codigo: 'acme' })
+      tenant: vi.fn().mockReturnValue({ codigo: 'acme' }),
     };
 
     TestBed.configureTestingModule({
@@ -43,8 +43,8 @@ describe('CartService', () => {
         CartService,
         provideHttpClient(),
         provideHttpClientTesting(),
-        { provide: TenantService, useValue: tenantServiceMock }
+        { provide: TenantService, useValue: tenantServiceMock },
-      ]
+      ],
     });
 
     service = TestBed.inject(CartService);
@@ -83,19 +83,23 @@ describe('CartService', () => {
       tenant_codigo: 'acme',
       status: 'active',
       items: [],
-      subtotal: '0.00'
+      subtotal: '0.00',
     });
   });
 
   it('should add item and update signal', () => {
-    service.addItem(10, 2).subscribe((res) => {
+    service.addItem('variant', 10, 2).subscribe((res) => {
       expect(res.data).toEqual(mockCart);
       expect(service.cart()).toEqual(mockCart);
     });
 
     const req = httpMock.expectOne('http://api.test/tenants/acme/cart/items');
     expect(req.request.method).toBe('POST');
-    expect(req.request.body).toEqual({ product_variant_id: 10, cantidad: 2 });
+    expect(req.request.body).toEqual({
+      buyable_type: 'variant',
+      buyable_id: 10,
+      cantidad: 2,
+    });
     expect(req.request.withCredentials).toBe(true);
     req.flush({ data: mockCart });
   });
@@ -122,7 +126,7 @@ describe('CartService', () => {
       tenant_codigo: 'acme',
       status: 'active',
       items: [],
-      subtotal: '0.00'
+      subtotal: '0.00',
     };
 
     service.removeItem(10).subscribe((res) => {

src/app/core/services/cart/cart.service.ts

@@ -4,10 +4,10 @@ import { catchError, map, Observable, tap } from 'rxjs';
 
 import { ApiResponse } from '../api-response.interface';
 import { TenantService } from '../tenant.service';
-import { Cart } from './cart.interface';
+import { BuyableType, Cart } from './cart.interface';
 
 @Injectable({
-  providedIn: 'root'
+  providedIn: 'root',
 })
 export class CartService {
   private readonly http = inject(HttpClient);
@@ -29,29 +29,31 @@ export class CartService {
       tenant_codigo: this.tenantService.tenant()?.codigo ?? '',
       status: 'active',
       items: [],
-      subtotal: '0.00'
+      subtotal: '0.00',
     });
   }
 
   loadCart(): Observable<Cart> {
     return this.http
       .get<ApiResponse<Cart>>(`${this.tenantApiUrl}/cart`, {
-        withCredentials: true
+        withCredentials: true,
       })
       .pipe(
         map((response) => response.data),
-        tap((cart) => this.cartState.set(cart))
+        tap((cart) => this.cartState.set(cart)),
       );
   }
 
-  addItem(productVariantId: number, cantidad: number): Observable<ApiResponse<Cart>> {
+  addItem(
+    buyableType: BuyableType,
+    buyableId: number,
+    cantidad: number,
+  ): Observable<ApiResponse<Cart>> {
     this.isUpdatingState.set(true);
     return this.http
-      .post<ApiResponse<Cart>>(
+      .post<
-        `${this.tenantApiUrl}/cart/items`,
+        ApiResponse<Cart>
-        { product_variant_id: productVariantId, cantidad },
+      >(`${this.tenantApiUrl}/cart/items`, { buyable_type: buyableType, buyable_id: buyableId, cantidad }, { withCredentials: true })
-        { withCredentials: true }
-      )
       .pipe(
         tap((response) => {
           this.cartState.set(response.data);
@@ -60,18 +62,16 @@ export class CartService {
         catchError((error) => {
           this.isUpdatingState.set(false);
           throw error;
-        })
+        }),
       );
   }
 
-  updateItemQuantity(productVariantId: number, cantidad: number): Observable<ApiResponse<Cart>> {
+  updateItemQuantity(cartItemId: number, cantidad: number): Observable<ApiResponse<Cart>> {
     this.isUpdatingState.set(true);
     return this.http
-      .patch<ApiResponse<Cart>>(
+      .patch<
-        `${this.tenantApiUrl}/cart/items/${productVariantId}`,
+        ApiResponse<Cart>
-        { cantidad },
+      >(`${this.tenantApiUrl}/cart/items/${cartItemId}`, { cantidad }, { withCredentials: true })
-        { withCredentials: true }
-      )
       .pipe(
         tap((response) => {
           this.cartState.set(response.data);
@@ -80,17 +80,16 @@ export class CartService {
         catchError((error) => {
           this.isUpdatingState.set(false);
           throw error;
-        })
+        }),
       );
   }
 
-  removeItem(productVariantId: number): Observable<ApiResponse<Cart>> {
+  removeItem(cartItemId: number): Observable<ApiResponse<Cart>> {
     this.isUpdatingState.set(true);
     return this.http
-      .delete<ApiResponse<Cart>>(
+      .delete<
-        `${this.tenantApiUrl}/cart/items/${productVariantId}`,
+        ApiResponse<Cart>
-        { withCredentials: true }
+      >(`${this.tenantApiUrl}/cart/items/${cartItemId}`, { withCredentials: true })
-      )
       .pipe(
         tap((response) => {
           this.cartState.set(response.data);
@@ -99,7 +98,7 @@ export class CartService {
         catchError((error) => {
           this.isUpdatingState.set(false);
           throw error;
-        })
+        }),
       );
   }
 }

src/app/core/services/catalog/catalog.interface.ts

@@ -29,16 +29,22 @@ export interface ProductAttribute {
   options: ProductAttributeOption[];
 }
 
+export type InventoryPolicy = 'tracked' | 'unlimited';
+
 export interface ProductVariant {
   id: number;
-  cantidad_maxima: number;
+  inventory_policy: InventoryPolicy;
+  cantidad_maxima: number | null;
+  cantidad_vendida: number;
   definitions: Record<string, string>;
   images: string[];
 }
 
 export interface ProductVariantMap {
   variant_id: number;
-  cantidad_maxima: number;
+  inventory_policy: InventoryPolicy;
+  cantidad_maxima: number | null;
+  cantidad_vendida: number;
   attributes: Record<string, string>;
 }
 
@@ -47,4 +53,3 @@ export interface ProductDetail extends Product {
   variants_map: ProductVariantMap[];
   variant: ProductVariant | null;
 }
-

src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.spec.ts

@@ -0,0 +1,75 @@
+import { TestBed } from '@angular/core/testing';
+import { beforeEach, describe, expect, it } from 'vitest';
+
+import { ProductAttribute } from '../../../../core/services/catalog/catalog.interface';
+import { ProductAttributeSelectorComponent } from './product-attribute-selector.component';
+
+describe('ProductAttributeSelectorComponent', () => {
+  const sizeAttribute: ProductAttribute = {
+    id: 1,
+    codigo: 'size',
+    nombre: 'Size',
+    is_required: true,
+    metadata_schema: null,
+    type: 'select',
+    options: [
+      { id: 10, value: 'S', label: 'S', sort_order: 0, metadata: null },
+      { id: 20, value: 'M', label: 'M', sort_order: 1, metadata: null },
+    ],
+  };
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ProductAttributeSelectorComponent],
+    }).compileComponents();
+  });
+
+  it('keeps an unlimited option available when maximum quantity is null', () => {
+    const fixture = TestBed.createComponent(ProductAttributeSelectorComponent);
+    fixture.componentRef.setInput('attributes', [sizeAttribute]);
+    fixture.componentRef.setInput('variantsMap', [
+      {
+        variant_id: 1,
+        inventory_policy: 'unlimited',
+        cantidad_maxima: null,
+        cantidad_vendida: 0,
+        attributes: { size: 'S' },
+      },
+    ]);
+    fixture.detectChanges();
+
+    const buttons = Array.from(
+      fixture.nativeElement.querySelectorAll('.attribute-selector__text-option'),
+    ) as HTMLButtonElement[];
+    expect(buttons[0].disabled).toBe(false);
+    expect(buttons[1].disabled).toBe(true);
+  });
+
+  it('disables tracked options without available stock', () => {
+    const fixture = TestBed.createComponent(ProductAttributeSelectorComponent);
+    fixture.componentRef.setInput('attributes', [sizeAttribute]);
+    fixture.componentRef.setInput('variantsMap', [
+      {
+        variant_id: 1,
+        inventory_policy: 'tracked',
+        cantidad_maxima: 0,
+        cantidad_vendida: 0,
+        attributes: { size: 'S' },
+      },
+      {
+        variant_id: 2,
+        inventory_policy: 'tracked',
+        cantidad_maxima: 2,
+        cantidad_vendida: 0,
+        attributes: { size: 'M' },
+      },
+    ]);
+    fixture.detectChanges();
+
+    const buttons = Array.from(
+      fixture.nativeElement.querySelectorAll('.attribute-selector__text-option'),
+    ) as HTMLButtonElement[];
+    expect(buttons[0].disabled).toBe(true);
+    expect(buttons[1].disabled).toBe(false);
+  });
+});

src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.ts

@@ -6,14 +6,14 @@ import {
   input,
   output,
   signal,
-  untracked
+  untracked,
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import {
   ProductAttribute,
   ProductAttributeOption,
   ProductVariant,
-  ProductVariantMap
+  ProductVariantMap,
 } from '../../../../core/services/catalog/catalog.interface';
 
 @Component({
@@ -22,7 +22,7 @@ import {
   imports: [CommonModule],
   templateUrl: './product-attribute-selector.component.html',
   styleUrl: './product-attribute-selector.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class ProductAttributeSelectorComponent {
   public attributes = input<ProductAttribute[]>([]);
@@ -45,10 +45,13 @@ export class ProductAttributeSelectorComponent {
       for (const option of attribute.options) {
         const optionNormalized = this.normalizeText(option.value || option.label);
 
-        const isAvailable = variants.some(variant => {
+        const isAvailable = variants.some((variant) => {
-          if (variant.cantidad_maxima <= 0) return false;
+          if (!this.isVariantAvailable(variant)) return false;
 
-          const variantAttrValue = this.getDefaultVariantAttributeValue(attribute, variant.attributes);
+          const variantAttrValue = this.getDefaultVariantAttributeValue(
+            attribute,
+            variant.attributes,
+          );
           if (!variantAttrValue || this.normalizeText(variantAttrValue) !== optionNormalized) {
             return false;
           }
@@ -57,10 +60,15 @@ export class ProductAttributeSelectorComponent {
             if (otherAttr.id === attribute.id) continue;
             const selectedOptionId = selections[otherAttr.id];
             if (selectedOptionId !== undefined) {
-                const selectedOption = otherAttr.options.find(o => o.id === selectedOptionId);
+              const selectedOption = otherAttr.options.find((o) => o.id === selectedOptionId);
               if (selectedOption) {
-                   const selectedNormalized = this.normalizeText(selectedOption.value || selectedOption.label);
+                const selectedNormalized = this.normalizeText(
-                   const vAttrValue = this.getDefaultVariantAttributeValue(otherAttr, variant.attributes);
+                  selectedOption.value || selectedOption.label,
+                );
+                const vAttrValue = this.getDefaultVariantAttributeValue(
+                  otherAttr,
+                  variant.attributes,
+                );
                 if (!vAttrValue || this.normalizeText(vAttrValue) !== selectedNormalized) {
                   return false;
                 }
@@ -102,17 +110,20 @@ export class ProductAttributeSelectorComponent {
     });
   }
 
-  protected hasSelectedOption(attribute: ProductAttribute, option: ProductAttributeOption): boolean {
+  protected hasSelectedOption(
+    attribute: ProductAttribute,
+    option: ProductAttributeOption,
+  ): boolean {
     return this.selectedAttributeOptions()[attribute.id] === option.id;
   }
 
   protected selectAttributeOption(
     attribute: ProductAttribute,
-    option: ProductAttributeOption
+    option: ProductAttributeOption,
   ): void {
     this.selectedAttributeOptions.update((current) => ({
       ...current,
-      [attribute.id]: option.id
+      [attribute.id]: option.id,
     }));
   }
 
@@ -124,7 +135,10 @@ export class ProductAttributeSelectorComponent {
     return this.findFirstHexValue(option.metadata) ?? '#D9D9D9';
   }
 
-  private initializeSelections(attributes: ProductAttribute[], defaultVariant: ProductVariant | null): void {
+  private initializeSelections(
+    attributes: ProductAttribute[],
+    defaultVariant: ProductVariant | null,
+  ): void {
     const selections: Record<number, number> = {};
 
     for (const attribute of attributes) {
@@ -139,7 +153,7 @@ export class ProductAttributeSelectorComponent {
 
   private findDefaultOptionId(
     attribute: ProductAttribute,
-    variant: ProductVariant | null
+    variant: ProductVariant | null,
   ): number | null {
     if (!variant) {
       return null;
@@ -152,7 +166,7 @@ export class ProductAttributeSelectorComponent {
 
     const normalizedValue = this.normalizeText(defaultValue);
     const matchByValue = attribute.options.find(
-      (option) => this.normalizeText(option.value) === normalizedValue
+      (option) => this.normalizeText(option.value) === normalizedValue,
     );
 
     if (matchByValue) {
@@ -160,7 +174,7 @@ export class ProductAttributeSelectorComponent {
     }
 
     const matchByLabel = attribute.options.find(
-      (option) => this.normalizeText(option.label) === normalizedValue
+      (option) => this.normalizeText(option.label) === normalizedValue,
     );
 
     return matchByLabel?.id ?? null;
@@ -168,7 +182,7 @@ export class ProductAttributeSelectorComponent {
 
   private getDefaultVariantAttributeValue(
     attribute: ProductAttribute,
-    variantAttributes: Record<string, string>
+    variantAttributes: Record<string, string>,
   ): string | null {
     const normalizedCodigo = this.normalizeText(attribute.codigo);
     const normalizedNombre = this.normalizeText(attribute.nombre);
@@ -192,6 +206,10 @@ export class ProductAttributeSelectorComponent {
       .toLowerCase();
   }
 
+  private isVariantAvailable(variant: ProductVariantMap): boolean {
+    return variant.inventory_policy === 'unlimited' || (variant.cantidad_maxima ?? 0) > 0;
+  }
+
   private findFirstHexValue(value: unknown): string | null {
     if (typeof value === 'string') {
       const match = value.match(/#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})\b/);
@@ -223,7 +241,7 @@ export class ProductAttributeSelectorComponent {
   private emitMatchingVariant(
     selections: Record<number, number>,
     variantsMap: ProductVariantMap[],
-    attributes: ProductAttribute[]
+    attributes: ProductAttribute[],
   ): void {
     if (attributes.length === 0 || variantsMap.length === 0) {
       this.variantChange.emit(null);
@@ -238,7 +256,7 @@ export class ProductAttributeSelectorComponent {
         allSelected = false;
         break;
       }
-      const option = attr.options.find(o => o.id === selectedOptionId);
+      const option = attr.options.find((o) => o.id === selectedOptionId);
       if (option) {
         selectedValuesById[attr.id] = this.normalizeText(option.value || option.label);
       }
@@ -249,8 +267,8 @@ export class ProductAttributeSelectorComponent {
       return;
     }
 
-    const matchingVariant = variantsMap.find(vMap => {
+    const matchingVariant = variantsMap.find((vMap) => {
-      return attributes.every(attr => {
+      return attributes.every((attr) => {
         const selectedValue = selectedValuesById[attr.id];
         const vMapValue = this.getDefaultVariantAttributeValue(attr, vMap.attributes);
         if (!vMapValue) return false;

src/app/features/store/pages/checkout-page/checkout-page.component.ts

@@ -1,4 +1,14 @@
-import { ChangeDetectionStrategy, Component, computed, effect, inject, OnInit, signal, untracked, ViewChild } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  computed,
+  effect,
+  inject,
+  OnInit,
+  signal,
+  untracked,
+  ViewChild,
+} from '@angular/core';
 import { FormBuilder, Validators } from '@angular/forms';
 import { Router } from '@angular/router';
 import { startWith } from 'rxjs';
@@ -14,7 +24,13 @@ import { StepComponent } from '../../../../shared/components/stepper/step.compon
 import { StepperComponent } from '../../../../shared/components/stepper/stepper.component';
 import { CheckoutDataStepComponent } from './checkout-data-step.component';
 import { CheckoutPaymentStepComponent } from './checkout-payment-step.component';
-import { CheckoutForm, PaymentMethod, PaymentMethodOption, TransferAccount, TransferField } from './checkout-page.models';
+import {
+  CheckoutForm,
+  PaymentMethod,
+  PaymentMethodOption,
+  TransferAccount,
+  TransferField,
+} from './checkout-page.models';
 
 @Component({
   selector: 'app-checkout-page',
@@ -24,11 +40,11 @@ import { CheckoutForm, PaymentMethod, PaymentMethodOption, TransferAccount, Tran
     StepperComponent,
     StepComponent,
     CheckoutDataStepComponent,
-    CheckoutPaymentStepComponent
+    CheckoutPaymentStepComponent,
   ],
   templateUrl: './checkout-page.component.html',
   styleUrl: './checkout-page.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class CheckoutPageComponent implements OnInit {
   private readonly formBuilder = inject(FormBuilder);
@@ -44,7 +60,7 @@ export class CheckoutPageComponent implements OnInit {
     nombre: ['', [Validators.required]],
     email: ['', [Validators.required, Validators.email]],
     dni: ['', [Validators.required]],
-    telefono: ['', [Validators.required]]
+    telefono: ['', [Validators.required]],
   });
 
   protected readonly cartSubtotal = computed(() => {
@@ -66,7 +82,7 @@ export class CheckoutPageComponent implements OnInit {
   protected readonly paymentMethods: ReadonlyArray<PaymentMethodOption> = [
     { id: 'qr', label: 'QR' },
     { id: 'transfer', label: 'Transferencia' },
-    { id: 'telepagos', label: 'TelePagos' }
+    { id: 'telepagos', label: 'TelePagos' },
   ];
   protected readonly selectedPaymentMethod = signal<PaymentMethod>('qr');
   protected readonly copiedTransferField = signal<TransferField | null>(null);
@@ -74,13 +90,15 @@ export class CheckoutPageComponent implements OnInit {
     titular: 'Nombre y Apellido',
     entidad: 'TelePagos',
     cvu: '0000000000000000000000',
-    alias: 'telepagos.ar'
+    alias: 'telepagos.ar',
   });
 
   protected readonly isCreatingPurchase = signal(false);
   protected readonly createdPurchaseId = signal<number | null>(null);
   protected readonly isGeneratingIntent = signal(false);
-  protected readonly isPaymentLoading = computed(() => this.isGeneratingIntent() || this.cartService.isUpdating());
+  protected readonly isPaymentLoading = computed(
+    () => this.isGeneratingIntent() || this.cartService.isUpdating(),
+  );
   protected readonly qrData = signal<string | null>(null);
 
   constructor() {
@@ -108,7 +126,7 @@ export class CheckoutPageComponent implements OnInit {
         nombre: user.nombre_apellido,
         email: user.email,
         dni: user.dni ?? '',
-        telefono: user.telefono ?? ''
+        telefono: user.telefono ?? '',
       });
       this.form.controls.nombre.disable();
       this.form.controls.email.disable();
@@ -138,14 +156,14 @@ export class CheckoutPageComponent implements OnInit {
     }
 
     return {
-      productVariantId: item.product_variant_id,
+      cartItemId: item.id,
       imageUrl: item.product?.imagen ?? null,
       product,
       originalPrice: null,
       discountedPrice: parseFloat(item.precio_unitario),
       discountPercentage: null,
       attributes,
-      quantity: item.cantidad
+      quantity: item.cantidad,
     };
   }
 
@@ -179,7 +197,6 @@ export class CheckoutPageComponent implements OnInit {
 
       // Auto trigger intent for default option
       void this.selectPaymentMethod(this.selectedPaymentMethod());
-
     } catch (error) {
       console.error('Failed to create purchase:', error);
       // Here we could show an alert or toast
@@ -205,7 +222,11 @@ export class CheckoutPageComponent implements OnInit {
     this.isGeneratingIntent.set(true);
 
     try {
-      const response = await this.checkoutService.generatePaymentIntent(tenant.codigo, purchaseId, method);
+      const response = await this.checkoutService.generatePaymentIntent(
+        tenant.codigo,
+        purchaseId,
+        method,
+      );
 
       if (method === 'qr' && response.qr_data?.qr_code) {
         this.qrData.set(response.qr_data.qr_code);
@@ -214,7 +235,7 @@ export class CheckoutPageComponent implements OnInit {
           titular: response.transfer_data.titular,
           entidad: response.transfer_data.entidad,
           cvu: response.transfer_data.cvu,
-          alias: response.transfer_data.alias
+          alias: response.transfer_data.alias,
         });
       }
     } catch (error) {

src/app/features/store/pages/product-detail-page/product-detail-page.component.html

@@ -52,17 +52,14 @@
 
           <section class="product-detail__section">
             <div class="product-detail__purchase">
-                <app-quantity-selector
+              <app-quantity-selector [(quantity)]="quantity" [max]="selectedVariantMax()" />
-                  [(quantity)]="quantity"
-                  [max]="selectedVariant()?.cantidad_maxima ?? 1"
-                />
 
               <div class="product-detail__actions">
                 <app-button
                   class="product-detail__cta"
                   variant="secondary"
                   type="button"
-                    [disabled]="!selectedVariant() || variantLoading() || addingToCart()"
+                  [disabled]="!selectedVariantAvailable() || variantLoading() || addingToCart()"
                   (click)="addToCart()"
                 >
                   @if (variantLoading() || addingToCart()) {
@@ -72,7 +69,11 @@
                   }
                 </app-button>
 
-                  <app-button class="product-detail__cta" type="button" [disabled]="!selectedVariant() || variantLoading()">
+                <app-button
+                  class="product-detail__cta"
+                  type="button"
+                  [disabled]="!selectedVariantAvailable() || variantLoading()"
+                >
                   @if (variantLoading()) {
                     <div class="spinner-border spinner-border-sm" role="status"></div>
                   } @else {

src/app/features/store/pages/product-detail-page/product-detail-page.component.spec.ts

@@ -155,7 +155,9 @@ describe('ProductDetailPageComponent', () => {
       images: ['https://example.com/product.png'],
       variant: {
         id: 123,
+        inventory_policy: 'tracked',
         cantidad_maxima: 10,
+        cantidad_vendida: 0,
         images: ['https://example.com/variant1.png', 'https://example.com/variant2.png'],
         definitions: {},
       },
@@ -260,7 +262,9 @@ describe('ProductDetailPageComponent', () => {
       ],
       variant: {
         id: 123,
+        inventory_policy: 'tracked',
         cantidad_maxima: 10,
+        cantidad_vendida: 0,
         images: ['https://example.com/variant1.png'],
         definitions: {
           color: 'beige',
@@ -309,7 +313,9 @@ describe('ProductDetailPageComponent', () => {
 
     fixture.componentInstance['selectedVariant'].set({
       variant_id: 1,
+      inventory_policy: 'tracked',
       cantidad_maxima: 10,
+      cantidad_vendida: 0,
       attributes: {},
     });
     fixture.detectChanges();
@@ -385,14 +391,18 @@ describe('ProductDetailPageComponent', () => {
       ...mockProduct,
       variant: {
         id: 123,
+        inventory_policy: 'tracked',
         cantidad_maxima: 5,
+        cantidad_vendida: 0,
         images: [],
         definitions: {},
       },
       variants_map: [
         {
           variant_id: 123,
+          inventory_policy: 'tracked',
           cantidad_maxima: 5,
+          cantidad_vendida: 0,
           attributes: {},
         },
       ],
@@ -417,7 +427,7 @@ describe('ProductDetailPageComponent', () => {
     addToCartButton.click();
     fixture.detectChanges();
 
-    expect(cartServiceStub.addItem).toHaveBeenCalledWith(123, 3);
+    expect(cartServiceStub.addItem).toHaveBeenCalledWith('variant', 123, 3);
     expect(toastServiceStub.success).toHaveBeenCalledWith('Producto agregado al carrito');
   });
 
@@ -426,14 +436,18 @@ describe('ProductDetailPageComponent', () => {
       ...mockProduct,
       variant: {
         id: 123,
+        inventory_policy: 'tracked',
         cantidad_maxima: 5,
+        cantidad_vendida: 0,
         images: [],
         definitions: {},
       },
       variants_map: [
         {
           variant_id: 123,
+          inventory_policy: 'tracked',
           cantidad_maxima: 5,
+          cantidad_vendida: 0,
           attributes: {},
         },
       ],
@@ -461,4 +475,71 @@ describe('ProductDetailPageComponent', () => {
       'No se pudo agregar el producto al carrito.',
     );
   });
+
+  it('allows unlimited variants to increase quantity without a maximum', async () => {
+    const unlimitedVariant = {
+      variant_id: 321,
+      inventory_policy: 'unlimited' as const,
+      cantidad_maxima: null,
+      cantidad_vendida: 10,
+      attributes: {},
+    };
+    resolveProduct({
+      ...mockProduct,
+      variant: {
+        id: 321,
+        inventory_policy: 'unlimited',
+        cantidad_maxima: null,
+        cantidad_vendida: 10,
+        images: [],
+        definitions: {},
+      },
+      variants_map: [unlimitedVariant],
+    });
+
+    await configureTestingModule();
+    const fixture = TestBed.createComponent(ProductDetailPageComponent);
+    fixture.detectChanges();
+
+    const increaseButton = fixture.nativeElement.querySelector(
+      'app-quantity-selector button:last-child',
+    ) as HTMLButtonElement;
+    expect(increaseButton.disabled).toBe(false);
+    increaseButton.click();
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance['quantity']()).toBe(2);
+  });
+
+  it('disables purchase actions for tracked variants without stock', async () => {
+    const trackedVariant = {
+      variant_id: 654,
+      inventory_policy: 'tracked' as const,
+      cantidad_maxima: 0,
+      cantidad_vendida: 5,
+      attributes: {},
+    };
+    resolveProduct({
+      ...mockProduct,
+      variant: {
+        id: 654,
+        inventory_policy: 'tracked',
+        cantidad_maxima: 0,
+        cantidad_vendida: 5,
+        images: [],
+        definitions: {},
+      },
+      variants_map: [trackedVariant],
+    });
+
+    await configureTestingModule();
+    const fixture = TestBed.createComponent(ProductDetailPageComponent);
+    fixture.detectChanges();
+
+    const purchaseButtons = Array.from(
+      fixture.nativeElement.querySelectorAll('app-button button'),
+    ) as HTMLButtonElement[];
+    expect(purchaseButtons).toHaveLength(2);
+    expect(purchaseButtons.every((button) => button.disabled)).toBe(true);
+  });
 });

src/app/features/store/pages/product-detail-page/product-detail-page.component.ts

@@ -80,6 +80,14 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
   protected readonly error = signal<string | null>(null);
   protected readonly selectedVariant = signal<ProductVariantMap | null>(null);
   protected readonly quantity = signal(1);
+  protected readonly selectedVariantMax = computed<number | null>(() => {
+    const variant = this.selectedVariant();
+    return variant ? variant.cantidad_maxima : 1;
+  });
+  protected readonly selectedVariantAvailable = computed(() => {
+    const variant = this.selectedVariant();
+    return variant !== null && this.isVariantAvailable(variant);
+  });
   protected readonly descriptionExpanded = signal(false);
   protected readonly descriptionMaxHeight = signal(0);
   protected readonly descriptionHasOverflow = signal(false);
@@ -143,15 +151,9 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
 
         this.product.update((currentProduct) => {
           if (!currentProduct) return null;
-          const updatedVariantsMap = currentProduct.variants_map.map((v) => {
-            if (v.variant_id === variantId) {
-              return { ...v, cantidad_maxima: 0 };
-            }
-            return v;
-          });
           return {
             ...currentProduct,
-            variants_map: updatedVariantsMap,
+            variants_map: currentProduct.variants_map.filter((v) => v.variant_id !== variantId),
           };
         });
 
@@ -209,7 +211,7 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
     }
 
     this.selectedVariant.set(variant);
-    if (variant && this.quantity() > variant.cantidad_maxima) {
+    if (variant && variant.cantidad_maxima !== null && this.quantity() > variant.cantidad_maxima) {
       this.quantity.set(Math.max(1, variant.cantidad_maxima));
     }
 
@@ -221,13 +223,13 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
 
   protected addToCart(): void {
     const variant = this.selectedVariant();
-    if (!variant) {
+    if (!variant || !this.isVariantAvailable(variant)) {
       this.toastService.danger('Por favor, selecciona una variante.');
       return;
     }
 
     this.addingToCart.set(true);
-    this.cartService.addItem(variant.variant_id, this.quantity()).subscribe({
+    this.cartService.addItem('variant', variant.variant_id, this.quantity()).subscribe({
       next: (res) => {
         const msg = res.message || 'Producto agregado al carrito';
         this.toastService.success(msg);
@@ -241,6 +243,10 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
     });
   }
 
+  private isVariantAvailable(variant: ProductVariantMap): boolean {
+    return variant.inventory_policy === 'unlimited' || (variant.cantidad_maxima ?? 0) > 0;
+  }
+
   protected toggleDescription(): void {
     this.descriptionExpanded.update((current) => !current);
   }

src/app/shared/components/cart/cart.component.html

@@ -1,16 +1,28 @@
-<section class="d-flex flex-column h-100 overflow-hidden text-secondary" [style.background-color]="backgroundColor()">
+<section
+  class="d-flex flex-column h-100 overflow-hidden text-secondary"
+  [style.background-color]="backgroundColor()"
+>
   <header class="d-flex align-items-center p-3 justify-content-between bg-transparent cart-header">
     <h2 class="m-0 text-uppercase fw-bold cart-title">{{ title() }}</h2>
 
     @if (showClose()) {
-      <button class="btn btn-link p-0 border-0 d-inline-flex align-items-center justify-content-center cart-close-btn" type="button" aria-label="Cerrar carrito" (click)="closed.emit()">
+      <button
+        class="btn btn-link p-0 border-0 d-inline-flex align-items-center justify-content-center cart-close-btn"
+        type="button"
+        aria-label="Cerrar carrito"
+        (click)="closed.emit()"
+      >
         <i class="fa-solid fa-xmark"></i>
       </button>
     }
   </header>
 
   <div class="d-grid w-100 flex-grow-1 overflow-y-auto cart-items-container">
-    @for (item of items(); track item.productVariantId || item.product + item.discountedPrice; let idx = $index) {
+    @for (
+      item of items();
+      track item.cartItemId || item.product + item.discountedPrice;
+      let idx = $index
+    ) {
       <app-cart-item
         [imageUrl]="item.imageUrl"
         [product]="item.product"
@@ -46,6 +58,3 @@
     </div>
   </footer>
 </section>
-
-
-

src/app/shared/components/cart/cart.component.spec.ts

@@ -2,10 +2,7 @@ import '@angular/compiler';
 import { signal } from '@angular/core';
 import { TestBed, getTestBed } from '@angular/core/testing';
 import { By } from '@angular/platform-browser';
-import {
+import { BrowserTestingModule, platformBrowserTesting } from '@angular/platform-browser/testing';
-  BrowserTestingModule,
-  platformBrowserTesting
-} from '@angular/platform-browser/testing';
 import { of, throwError } from 'rxjs';
 import { afterEach, beforeAll, describe, expect, it, vi } from 'vitest';
 
@@ -17,10 +14,7 @@ import { CartComponent } from './cart.component';
 describe('CartComponent', () => {
   beforeAll(() => {
     try {
-      getTestBed().initTestEnvironment(
+      getTestBed().initTestEnvironment(BrowserTestingModule, platformBrowserTesting());
-        BrowserTestingModule,
-        platformBrowserTesting()
-      );
     } catch {
       // Test environment may already be initialized by another setup entrypoint.
     }
@@ -42,38 +36,38 @@ describe('CartComponent', () => {
           useValue: {
             cart: signal(null).asReadonly(),
             updateItemQuantity: vi.fn(),
-            removeItem
+            removeItem,
-          }
+          },
         },
         {
           provide: ModalService,
           useValue: {
-            openConfirmDelete
+            openConfirmDelete,
-          }
+          },
         },
         {
           provide: ToastService,
           useValue: {
             success: vi.fn(),
             info: vi.fn(),
-            danger: vi.fn()
+            danger: vi.fn(),
-          }
+          },
-        }
+        },
-      ]
+      ],
     }).compileComponents();
 
     const fixture = TestBed.createComponent(CartComponent);
     fixture.componentRef.setInput('items', [
       {
-        productVariantId: 10,
+        cartItemId: 10,
         imageUrl: null,
         product: 'Producto de prueba',
         originalPrice: null,
         discountedPrice: 1000,
         discountPercentage: null,
         attributes: [],
-        quantity: 1
+        quantity: 1,
-      }
+      },
     ]);
     fixture.detectChanges();
 
@@ -81,10 +75,9 @@ describe('CartComponent', () => {
 
     expect(openConfirmDelete).toHaveBeenCalledWith({
       title: 'Eliminar producto',
-      content:
+      content: 'Se eliminara "Producto de prueba" del carrito. Esta accion no se puede deshacer.',
-        'Se eliminara "Producto de prueba" del carrito. Esta accion no se puede deshacer.',
       confirmLabel: 'Eliminar',
-      cancelLabel: 'Cancelar'
+      cancelLabel: 'Cancelar',
     });
     expect(removeItem).toHaveBeenCalledWith(10);
   });
@@ -101,38 +94,38 @@ describe('CartComponent', () => {
           useValue: {
             cart: signal(null).asReadonly(),
             updateItemQuantity: vi.fn(),
-            removeItem
+            removeItem,
-          }
+          },
         },
         {
           provide: ModalService,
           useValue: {
-            openConfirmDelete
+            openConfirmDelete,
-          }
+          },
         },
         {
           provide: ToastService,
           useValue: {
             success: vi.fn(),
             info: vi.fn(),
-            danger: vi.fn()
+            danger: vi.fn(),
-          }
+          },
-        }
+        },
-      ]
+      ],
     }).compileComponents();
 
     const fixture = TestBed.createComponent(CartComponent);
     fixture.componentRef.setInput('items', [
       {
-        productVariantId: 10,
+        cartItemId: 10,
         imageUrl: null,
         product: 'Producto de prueba',
         originalPrice: null,
         discountedPrice: 1000,
         discountPercentage: null,
         attributes: [],
-        quantity: 1
+        quantity: 1,
-      }
+      },
     ]);
     fixture.detectChanges();
 
@@ -155,36 +148,36 @@ describe('CartComponent', () => {
           useValue: {
             cart: signal(null).asReadonly(),
             updateItemQuantity,
-            removeItem: vi.fn()
+            removeItem: vi.fn(),
-          }
+          },
         },
         {
           provide: ModalService,
-          useValue: {}
+          useValue: {},
         },
         {
           provide: ToastService,
           useValue: {
             success: vi.fn(),
             info: vi.fn(),
-            danger
+            danger,
-          }
+          },
-        }
+        },
-      ]
+      ],
     }).compileComponents();
 
     const fixture = TestBed.createComponent(CartComponent);
     const component = fixture.componentInstance;
 
     const item = {
-      productVariantId: 10,
+      cartItemId: 10,
       imageUrl: null,
       product: 'Producto de prueba',
       originalPrice: null,
       discountedPrice: 1000,
       discountPercentage: null,
       attributes: [],
-      quantity: 1
+      quantity: 1,
     };
 
     fixture.componentRef.setInput('items', [item]);
@@ -221,36 +214,36 @@ describe('CartComponent', () => {
           useValue: {
             cart: signal(null).asReadonly(),
             updateItemQuantity,
-            removeItem: vi.fn()
+            removeItem: vi.fn(),
-          }
+          },
         },
         {
           provide: ModalService,
-          useValue: {}
+          useValue: {},
         },
         {
           provide: ToastService,
           useValue: {
             success,
             info: vi.fn(),
-            danger: vi.fn()
+            danger: vi.fn(),
-          }
+          },
-        }
+        },
-      ]
+      ],
     }).compileComponents();
 
     const fixture = TestBed.createComponent(CartComponent);
     const component = fixture.componentInstance;
 
     const item = {
-      productVariantId: 10,
+      cartItemId: 10,
       imageUrl: null,
       product: 'Producto de prueba',
       originalPrice: null,
       discountedPrice: 1000,
       discountPercentage: null,
       attributes: [],
-      quantity: 1
+      quantity: 1,
     };
 
     fixture.componentRef.setInput('items', [item]);

src/app/shared/components/cart/cart.component.ts

@@ -1,4 +1,12 @@
-import { ChangeDetectionStrategy, Component, computed, inject, input, output, signal } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  computed,
+  inject,
+  input,
+  output,
+  signal,
+} from '@angular/core';
 import { HttpErrorResponse } from '@angular/common/http';
 import { Subject, EMPTY } from 'rxjs';
 import { catchError, debounceTime, groupBy, mergeMap, switchMap, tap } from 'rxjs';
@@ -9,7 +17,7 @@ import { CartService } from '../../../core/services/cart/cart.service';
 import { ToastService } from '../../../core/services/toast.service';
 
 export interface CartItemMock {
-  productVariantId?: number;
+  cartItemId?: number;
   imageUrl: string | null;
   product: string;
   originalPrice: number | null;
@@ -25,13 +33,13 @@ export interface CartItemMock {
   imports: [CartItemComponent],
   templateUrl: './cart.component.html',
   styleUrl: './cart.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class CartComponent {
   private readonly cartService = inject(CartService);
   private readonly modalService = inject(ModalService);
   private readonly toastService = inject(ToastService);
-  private readonly quantityUpdates$ = new Subject<{ productVariantId: number; quantity: number }>();
+  private readonly quantityUpdates$ = new Subject<{ cartItemId: number; quantity: number }>();
 
   readonly title = input<string>('CARRITO');
   readonly showClose = input<boolean>(false);
@@ -46,68 +54,75 @@ export class CartComponent {
   protected readonly quantityOverrides = signal<Record<number, number>>({});
 
   constructor() {
-    this.quantityUpdates$.pipe(
+    this.quantityUpdates$
-      groupBy(update => update.productVariantId),
+      .pipe(
-      mergeMap(group$ => group$.pipe(
+        groupBy((update) => update.cartItemId),
+        mergeMap((group$) =>
+          group$.pipe(
             debounceTime(1000),
-        switchMap(update => this.cartService.updateItemQuantity(update.productVariantId, update.quantity).pipe(
+            switchMap((update) =>
+              this.cartService.updateItemQuantity(update.cartItemId, update.quantity).pipe(
                 tap({
                   next: (res) => {
                     const msg = res.message || 'Cantidad de producto actualizada.';
                     this.toastService.success(msg);
-              this.clearOverride(update.productVariantId);
+                    this.clearOverride(update.cartItemId);
                   },
                   error: (err: HttpErrorResponse) => {
                     console.error('Error updating cart quantity', err);
-              const msg = err.error?.message || 'Error al actualizar la cantidad del producto.';
+                    const msg =
+                      err.error?.message || 'Error al actualizar la cantidad del producto.';
                     this.toastService.danger(msg);
-              this.clearOverride(update.productVariantId);
+                    this.clearOverride(update.cartItemId);
-            }
+                  },
                 }),
-          catchError(() => EMPTY)
+                catchError(() => EMPTY),
-        ))
+              ),
-      )),
+            ),
-      takeUntilDestroyed()
+          ),
-    ).subscribe();
+        ),
+        takeUntilDestroyed(),
+      )
+      .subscribe();
   }
 
   protected getItemQuantity(item: CartItemMock): number {
-    if (item.productVariantId !== undefined && this.quantityOverrides()[item.productVariantId] !== undefined) {
+    if (item.cartItemId !== undefined && this.quantityOverrides()[item.cartItemId] !== undefined) {
-      return this.quantityOverrides()[item.productVariantId];
+      return this.quantityOverrides()[item.cartItemId];
     }
     return item.quantity;
   }
 
-  private clearOverride(productVariantId: number): void {
+  private clearOverride(cartItemId: number): void {
     this.quantityOverrides.update((overrides) => {
       const copy = { ...overrides };
-      delete copy[productVariantId];
+      delete copy[cartItemId];
       return copy;
     });
   }
 
   protected onItemQuantityChange(index: number, newQuantity: number): void {
     const mockItem = this.items()[index];
-    const productVariantId = mockItem?.productVariantId;
+    const cartItemId = mockItem?.cartItemId;
-    if (productVariantId) {
+    if (cartItemId) {
       this.quantityOverrides.update((overrides) => ({
         ...overrides,
-        [productVariantId]: newQuantity
+        [cartItemId]: newQuantity,
       }));
       this.quantityUpdates$.next({
-        productVariantId,
+        cartItemId,
-        quantity: newQuantity
+        quantity: newQuantity,
       });
     } else {
       const item = this.cartService.cart()?.items[index];
       if (item) {
         this.quantityOverrides.update((overrides) => ({
           ...overrides,
-          [item.product_variant_id]: newQuantity
+          [item.id]: newQuantity,
         }));
         this.quantityUpdates$.next({
-          productVariantId: item.product_variant_id,
+          cartItemId: item.id,
-          quantity: newQuantity
+          quantity: newQuantity,
         });
       }
     }
@@ -120,14 +135,16 @@ export class CartComponent {
       return;
     }
 
-    this.modalService.openConfirmDelete({
+    this.modalService
+      .openConfirmDelete({
         title: 'Eliminar producto',
         content: `Se eliminara "${target.productName}" del carrito. Esta accion no se puede deshacer.`,
         confirmLabel: 'Eliminar',
-      cancelLabel: 'Cancelar'
+        cancelLabel: 'Cancelar',
-    }).subscribe((confirmed) => {
+      })
+      .subscribe((confirmed) => {
         if (confirmed) {
-        this.removeItem(target.productVariantId);
+          this.removeItem(target.cartItemId);
         }
       });
   }
@@ -143,16 +160,14 @@ export class CartComponent {
     return `$ ${parts.join(',')}`;
   }
 
-  private resolveRemoveTarget(
+  private resolveRemoveTarget(index: number): { cartItemId: number; productName: string } | null {
-    index: number
-  ): { productVariantId: number; productName: string } | null {
     const mockItem = this.items()[index];
-    const productVariantId = mockItem?.productVariantId;
+    const cartItemId = mockItem?.cartItemId;
 
-    if (productVariantId) {
+    if (cartItemId) {
       return {
-        productVariantId,
+        cartItemId,
-        productName: mockItem.product
+        productName: mockItem.product,
       };
     }
 
@@ -163,13 +178,13 @@ export class CartComponent {
     }
 
     return {
-      productVariantId: item.product_variant_id,
+      cartItemId: item.id,
-      productName: item.product?.nombre ?? 'este producto'
+      productName: item.product?.nombre ?? 'este producto',
     };
   }
 
-  private removeItem(productVariantId: number): void {
+  private removeItem(cartItemId: number): void {
-    this.cartService.removeItem(productVariantId).subscribe({
+    this.cartService.removeItem(cartItemId).subscribe({
       next: (res) => {
         const msg = res.message || 'Producto eliminado del carrito.';
         this.toastService.info(msg);
@@ -178,8 +193,7 @@ export class CartComponent {
         console.error('Error removing item from cart', err);
         const msg = err.error?.message || 'Error al eliminar el producto del carrito.';
         this.toastService.danger(msg);
-      }
+      },
     });
   }
 }
-

src/app/shared/components/quantity-selector/quantity-selector.component.html

@@ -1,4 +1,8 @@
-<div class="quantity-selector d-inline-flex align-items-center overflow-hidden rounded" [class.quantity-selector--small]="size() === 'small'" aria-label="Selector de cantidad">
+<div
+  class="quantity-selector d-inline-flex align-items-center overflow-hidden rounded"
+  [class.quantity-selector--small]="size() === 'small'"
+  aria-label="Selector de cantidad"
+>
   <button
     type="button"
     class="quantity-selector__button border-0 p-0 fw-bold lh-1"
@@ -9,13 +13,16 @@
     -
   </button>
 
-  <span class="quantity-selector__value flex-grow-1 min-w-0 text-center fw-bold lh-1 user-select-none">{{ quantity() }}</span>
+  <span
+    class="quantity-selector__value flex-grow-1 min-w-0 text-center fw-bold lh-1 user-select-none"
+    >{{ quantity() }}</span
+  >
 
   <button
     type="button"
     class="quantity-selector__button border-0 p-0 fw-bold lh-1"
     aria-label="Aumentar cantidad"
-    [disabled]="quantity() >= max()"
+    [disabled]="atMaximum()"
     (click)="onIncrease()"
   >
     +

src/app/shared/components/quantity-selector/quantity-selector.component.spec.ts

@@ -0,0 +1,55 @@
+import { TestBed } from '@angular/core/testing';
+import { beforeEach, describe, expect, it } from 'vitest';
+
+import { QuantitySelectorComponent } from './quantity-selector.component';
+
+describe('QuantitySelectorComponent', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [QuantitySelectorComponent],
+    }).compileComponents();
+  });
+
+  it('stops increasing when it reaches a numeric maximum', () => {
+    const fixture = TestBed.createComponent(QuantitySelectorComponent);
+    fixture.componentRef.setInput('max', 2);
+    fixture.detectChanges();
+
+    const increaseButton = fixture.nativeElement.querySelector(
+      'button:last-child',
+    ) as HTMLButtonElement;
+    increaseButton.click();
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.quantity()).toBe(2);
+    expect(increaseButton.disabled).toBe(true);
+  });
+
+  it('keeps increasing when maximum is null', () => {
+    const fixture = TestBed.createComponent(QuantitySelectorComponent);
+    fixture.componentRef.setInput('max', null);
+    fixture.detectChanges();
+
+    const increaseButton = fixture.nativeElement.querySelector(
+      'button:last-child',
+    ) as HTMLButtonElement;
+    increaseButton.click();
+    increaseButton.click();
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.quantity()).toBe(3);
+    expect(increaseButton.disabled).toBe(false);
+  });
+
+  it('does not decrease below the configured minimum', () => {
+    const fixture = TestBed.createComponent(QuantitySelectorComponent);
+    fixture.detectChanges();
+
+    const decreaseButton = fixture.nativeElement.querySelector(
+      'button:first-child',
+    ) as HTMLButtonElement;
+
+    expect(decreaseButton.disabled).toBe(true);
+    expect(fixture.componentInstance.quantity()).toBe(1);
+  });
+});

src/app/shared/components/quantity-selector/quantity-selector.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, input, model, output } from '@angular/core';
+import { ChangeDetectionStrategy, Component, computed, input, model, output } from '@angular/core';
 
 @Component({
   selector: 'app-quantity-selector',
@@ -6,14 +6,19 @@ import { ChangeDetectionStrategy, Component, input, model, output } from '@angul
   imports: [],
   templateUrl: './quantity-selector.component.html',
   styleUrl: './quantity-selector.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class QuantitySelectorComponent {
   readonly quantity = model<number>(1);
   readonly min = input<number>(1);
-  readonly max = input<number>(100);
+  readonly max = input<number | null>(100);
   readonly size = input<'small' | 'medium'>('medium');
 
+  protected readonly atMaximum = computed(() => {
+    const max = this.max();
+    return max !== null && this.quantity() >= max;
+  });
+
   readonly increase = output<void>();
   readonly decrease = output<void>();
 
@@ -25,7 +30,7 @@ export class QuantitySelectorComponent {
   }
 
   protected onIncrease(): void {
-    if (this.quantity() < this.max()) {
+    if (!this.atMaximum()) {
       this.quantity.set(this.quantity() + 1);
       this.increase.emit();
     }