SUGGESTIONS.md

Senior-Level Improvements

1. Architecture & State Management

Global State Management

• Replace Context API with Redux Toolkit or Zustand
  • Gain: Better state management, dev tools, middleware support
  • Example: Move cart state to Redux with proper slices and actions

// Example Redux slice for cart
const cartSlice = createSlice({
  name: 'cart',
  initialState,
  reducers: {
    addToCart: (state, action) => {
      // Immutable state updates with Redux Toolkit
    },
    removeFromCart: (state, action) => {
      // Automatic handling of immutability
    }
  }
});

Service Layer

• API Abstraction
  • Gain: Better separation of concerns, easier testing and maintenance
  • Example: Create dedicated service classes for API operations

class ProductService {
  private api: ApiClient;
  
  async getProducts(filters: ProductFilters): Promise<Product[]> {
    // Centralized error handling and response mapping
  }
}

2. Performance Optimizations

Code Splitting

• Dynamic Imports
  • Gain: Smaller initial bundle size, faster page loads
  • Example: Lazy load product filters on mobile

const ProductFilters = dynamic(() => import('./ProductFilters'), {
  loading: () => <FiltersSkeleton />,
  ssr: false
});

Caching Strategy

• Apollo Client Caching
  • Gain: Faster data access, reduced server load
  • Example: Implement field-level caching policies

const cache = new InMemoryCache({
  typePolicies: {
    Product: {
      fields: {
        price: {
          read(price) {
            // Custom cache reading logic
          }
        }
      }
    }
  }
});

3. Testing & Quality Assurance

Unit Testing

• Jest/React Testing Library
  • Gain: Catch bugs early, ensure component behavior
  • Example: Test hooks like useProductFilters in isolation

describe('useProductFilters', () => {
  it('should filter products by price range', () => {
    const { result } = renderHook(() => useProductFilters());
    act(() => {
      result.current.setPriceRange([10, 50]);
    });
    expect(result.current.filterProducts(mockProducts)).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ price: expect.any(Number) })
      ])
    );
  });
});

E2E Testing

• Expand Playwright Tests
  • Gain: Ensure critical user flows work end-to-end
  • Example: Add comprehensive checkout flow testing

test('complete checkout process', async ({ page }) => {
  await page.goto('/');
  await page.click('[data-testid="product-card"]');
  await page.click('[data-testid="add-to-cart"]');
  // Test entire checkout flow
});

4. WooCommerce Integration Enhancements

Session Management

• Improve WooCommerce Session Handling
  • Gain: Better cart persistence, reduced errors
  • Example: Enhanced session token management

// Enhanced WooCommerce session middleware
const enhancedMiddleware = new ApolloLink((operation, forward) => {
  const session = getWooSession();
  if (session && !isExpired(session)) {
    operation.setContext({
      headers: {
        'woocommerce-session': `Session ${session.token}`
      }
    });
  }
  return forward(operation);
});

Cart Improvements

• Enhanced Cart Features
  • Gain: Better user experience with cart functionality
  • Example: Add cart total, copy billing address to shipping

5. Developer Experience

Documentation

• Storybook Integration
  • Gain: Better component documentation, easier UI development
  • Example: Document all variants of ProductCard

// ProductCard.stories.tsx
export const WithDiscount = {
  args: {
    product: {
      name: 'Test Product',
      price: '100',
      salePrice: '80',
      onSale: true
    }
  }
};

TypeScript Improvements

• Stricter Configuration
  • Gain: Catch more bugs at compile time
  • Example: Enable strict mode, add proper generics

// tsconfig.json improvements
{
  "compilerOptions": {
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true
  }
}

6. Monitoring & Analytics

Error Tracking

• Sentry Integration
  • Gain: Better error tracking, faster bug fixing
  • Example: Add proper error boundaries with Sentry

class ErrorBoundary extends React.Component {
  componentDidCatch(error, errorInfo) {
    Sentry.captureException(error, { extra: errorInfo });
  }
}

Performance Monitoring

• Core Web Vitals
  • Gain: Track and improve user experience metrics
  • Example: Implement proper performance monitoring

7. Code Quality & Maintainability

Design Patterns

• Implement Factory Pattern
  • Gain: Better code organization, easier maintenance
  • Example: Create product factory for different types

class ProductFactory {
  createProduct(type: ProductType, data: ProductData): Product {
    switch (type) {
      case 'simple':
        return new SimpleProduct(data);
      case 'variable':
        return new VariableProduct(data);
      default:
        throw new Error(`Unknown product type: ${type}`);
    }
  }
}

Code Organization

• Feature-based Structure
  • Gain: Better code organization, easier navigation
  • Example: Reorganize code by feature instead of type

src/
  features/
    products/
      components/
      hooks/
      services/
      types/
    cart/
      components/
      hooks/
      services/
      types/

Implementation Priority Matrix

High Impact, Low Effort (Do First)

1. TypeScript Strict Mode

   • Simply update tsconfig.json
   • Immediate impact on code quality
   • Catches type-related bugs early

2. Lighthouse Score Improvements

   • Already have CI integration
   • Focus on performance metrics
   • Quick accessibility wins

3. Cart Total Implementation

   • Listed in TODO
   • High user impact
   • Relatively simple change

High Impact, High Effort (Plan Carefully)

1. State Management Refactor

   • Requires significant refactoring
   • Major architectural improvement
   • Plan and implement in phases

2. Feature-based Code Reorganization

   • Substantial restructuring needed
   • Improves long-term maintainability
   • Requires team coordination

Low Impact, Low Effort (Quick Wins)

1. Storybook Documentation

   • Can be added gradually
   • Improves developer experience
   • Start with key components

2. Performance Monitoring

   • Easy integration with existing tools
   • Provides valuable insights
   • Quick setup process

Low Impact, High Effort (Consider Later)

1. Expand Test Coverage

   • Build upon existing Playwright E2E tests
   • Already have basic homepage tests
   • Focus on:
     • WooCommerce integration tests
     • Cart/checkout flows
     • Variable product handling
     • Stock status updates

2. User Registration & Dashboard

   • Listed in TODO
   • Requires careful WooCommerce integration
   • Consider after core improvements

Implementation Strategy

1. Week 1-2: Quick Wins

   • Enable TypeScript strict mode
   • Add error boundaries
   • Optimize Apollo cache
   • Estimated effort: 3-4 days
   • Immediate quality improvements

2. Week 3-4: Foundation Building

   • Begin Storybook documentation
   • Set up performance monitoring
   • Expand existing E2E tests with:
     • Cart manipulation scenarios
     • Checkout flow validation
     • Error state handling
   • Estimated effort: 5-7 days
   • Builds upon existing test infrastructure

3. Month 2: Major Improvements

   • Implement user registration flow
   • Add cart improvements from TODO list
   • Enhance WooCommerce session handling
   • Estimated effort: 3-4 weeks
   • Focus on core user experience

This prioritization ensures:

• Quick delivery of high-impact improvements
• Minimal disruption to ongoing development
• Measurable progress at each stage
• Efficient use of development resources