# Umami Analytics Examples

This file contains practical examples of how to use the analytics system in various scenarios.

## Table of Contents

1. [Basic Event Tracking](#basic-event-tracking)
2. [E-commerce Tracking](#e-commerce-tracking)
3. [Form Tracking](#form-tracking)
4. [User Authentication](#user-authentication)
5. [Search & Filtering](#search--filtering)
6. [Content Tracking](#content-tracking)
7. [Error Tracking](#error-tracking)
8. [Performance Tracking](#performance-tracking)
9. [Custom Navigation](#custom-navigation)

---

## Basic Event Tracking

### Button Click Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function CallToAction() {
  const { trackEvent } = useAnalytics();

  const handleClick = () => {
    trackEvent(AnalyticsEvents.BUTTON_CLICK, {
      button_id: 'cta-primary',
      button_text: 'Get Started',
      page: 'homepage',
      section: 'hero',
    });
  };

  return (
    <button onClick={handleClick} className="cta-button">
      Get Started
    </button>
  );
}
```

### Link Click Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function NavigationLink({ href, children }) {
  const { trackEvent } = useAnalytics();

  const handleClick = () => {
    trackEvent(AnalyticsEvents.LINK_CLICK, {
      link_url: href,
      link_text: children,
      link_type: 'navigation',
    });
  };

  return (
    <a href={href} onClick={handleClick}>
      {children}
    </a>
  );
}
```

---

## E-commerce Tracking

### Product Page View

```tsx
'use client';

import { useEffect } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

interface Product {
  id: string;
  name: string;
  category: string;
  price: number;
  sku: string;
}

function ProductPage({ product }: { product: Product }) {
  const { trackEvent } = useAnalytics();

  useEffect(() => {
    // Track product view when page loads
    trackEvent(AnalyticsEvents.PRODUCT_VIEW, {
      product_id: product.id,
      product_name: product.name,
      product_category: product.category,
      product_sku: product.sku,
      price: product.price,
      currency: 'EUR',
    });
  }, [product]);

  return (
    <div>
      <h1>{product.name}</h1>
      <p>€{product.price}</p>
    </div>
  );
}
```

### Add to Cart

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function AddToCartButton({ product, quantity = 1 }) {
  const { trackEvent } = useAnalytics();

  const handleAddToCart = () => {
    trackEvent(AnalyticsEvents.PRODUCT_ADD_TO_CART, {
      product_id: product.id,
      product_name: product.name,
      product_category: product.category,
      price: product.price,
      quantity: quantity,
      cart_total: 150.0, // Current cart total
    });

    // Actual add to cart logic
    // addToCart(product, quantity);
  };

  return <button onClick={handleAddToCart}>Add to Cart</button>;
}
```

### Purchase Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function CheckoutComplete({ order }) {
  const { trackEvent } = useAnalytics();

  useEffect(() => {
    // Track purchase when checkout completes
    trackEvent(AnalyticsEvents.PRODUCT_PURCHASE, {
      transaction_id: order.id,
      transaction_total: order.total,
      transaction_currency: 'EUR',
      transaction_tax: order.tax,
      transaction_shipping: order.shipping,
      product_count: order.items.length,
      products: order.items.map((item) => ({
        product_id: item.product.id,
        product_name: item.product.name,
        quantity: item.quantity,
        price: item.price,
      })),
    });
  }, [order]);

  return <div>Order Complete!</div>;
}
```

### Wishlist Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function WishlistButton({ product }) {
  const { trackEvent } = useAnalytics();
  const [isInWishlist, setIsInWishlist] = useState(false);

  const toggleWishlist = () => {
    const newState = !isInWishlist;

    trackEvent(
      newState ? AnalyticsEvents.PRODUCT_WISHLIST_ADD : AnalyticsEvents.PRODUCT_WISHLIST_REMOVE,
      {
        product_id: product.id,
        product_name: product.name,
        product_category: product.category,
      },
    );

    setIsInWishlist(newState);
    // Update wishlist in backend
  };

  return <button onClick={toggleWishlist}>{isInWishlist ? '❤️' : '🤍'}</button>;
}
```

---

## Form Tracking

### Contact Form

```tsx
'use client';

import { useState } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function ContactForm() {
  const { trackEvent } = useAnalytics();
  const [formData, setFormData] = useState({
    name: '',
    email: '',
    message: '',
  });

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();

    // Track form start
    trackEvent(AnalyticsEvents.FORM_START, {
      form_id: 'contact-form',
      form_name: 'Contact Us',
    });

    // Track form submission
    trackEvent(AnalyticsEvents.FORM_SUBMIT, {
      form_id: 'contact-form',
      form_name: 'Contact Us',
      form_fields: {
        name: formData.name,
        email: formData.email,
        message_length: formData.message.length,
      },
    });

    // Submit form
    // submitContactForm(formData);
  };

  const handleChange = (e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) => {
    setFormData((prev) => ({
      ...prev,
      [e.target.name]: e.target.value,
    }));
  };

  return (
    <form onSubmit={handleSubmit}>
      <input name="name" onChange={handleChange} />
      <input name="email" onChange={handleChange} />
      <textarea name="message" onChange={handleChange} />
      <button type="submit">Send</button>
    </form>
  );
}
```

### Newsletter Signup

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function NewsletterSignup() {
  const { trackEvent } = useAnalytics();

  const handleSubscribe = (email: string) => {
    trackEvent(AnalyticsEvents.NEWSLETTER_SUBSCRIBE, {
      email: email,
      source: 'footer',
      newsletter_type: 'weekly',
    });

    // Subscribe to newsletter
    // subscribeToNewsletter(email);
  };

  return (
    <div>
      <input placeholder="Enter email" />
      <button onClick={() => handleSubscribe('user@example.com')}>Subscribe</button>
    </div>
  );
}
```

### Quote Request Form

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function QuoteRequestForm() {
  const { trackEvent } = useAnalytics();

  const handleSubmit = (formData: FormData) => {
    trackEvent(AnalyticsEvents.QUOTE_REQUEST, {
      form_id: 'quote-request',
      product_type: formData.get('product_type'),
      quantity: formData.get('quantity'),
      company_size: formData.get('company_size'),
      urgency: formData.get('urgency'),
    });

    // Submit quote request
    // submitQuoteRequest(formData);
  };

  return (
    <form onSubmit={handleSubmit}>
      {/* Form fields */}
      <button type="submit">Request Quote</button>
    </form>
  );
}
```

---

## User Authentication

### Login Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function LoginForm() {
  const { trackEvent } = useAnalytics();

  const handleLogin = async (email: string, password: string) => {
    try {
      // Track login attempt
      trackEvent(AnalyticsEvents.USER_LOGIN, {
        user_email: email,
        login_method: 'email',
        login_status: 'attempt',
      });

      // Perform login
      // await login(email, password);

      // Track successful login
      trackEvent(AnalyticsEvents.USER_LOGIN, {
        user_email: email,
        login_method: 'email',
        login_status: 'success',
      });
    } catch (error) {
      // Track failed login
      trackEvent(AnalyticsEvents.USER_LOGIN, {
        user_email: email,
        login_method: 'email',
        login_status: 'failed',
        error_message: error.message,
      });
    }
  };

  return (
    <form
      onSubmit={(e) => {
        e.preventDefault();
        handleLogin('user@example.com', 'password');
      }}
    >
      {/* Form fields */}
      <button type="submit">Login</button>
    </form>
  );
}
```

### Signup Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function SignupForm() {
  const { trackEvent } = useAnalytics();

  const handleSignup = (userData: { email: string; name: string; company?: string }) => {
    trackEvent(AnalyticsEvents.USER_SIGNUP, {
      user_email: userData.email,
      user_name: userData.name,
      company: userData.company,
      signup_method: 'email',
      signup_source: 'homepage',
    });

    // Perform signup
    // signup(userData);
  };

  return (
    <form
      onSubmit={(e) => {
        e.preventDefault();
        handleSignup({
          email: 'user@example.com',
          name: 'John Doe',
          company: 'ACME Corp',
        });
      }}
    >
      {/* Form fields */}
      <button type="submit">Sign Up</button>
    </form>
  );
}
```

---

## Search & Filtering

### Search Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function SearchBar() {
  const { trackEvent } = useAnalytics();
  const [query, setQuery] = useState('');

  const handleSearch = () => {
    trackEvent(AnalyticsEvents.SEARCH, {
      search_query: query,
      search_results_count: 42, // You'd get this from your search results
      search_filters: {
        category: 'cables',
        voltage: 'high',
      },
    });

    // Perform search
    // performSearch(query);
  };

  return (
    <div>
      <input
        value={query}
        onChange={(e) => setQuery(e.target.value)}
        placeholder="Search products..."
      />
      <button onClick={handleSearch}>Search</button>
    </div>
  );
}
```

### Filter Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function ProductFilters() {
  const { trackEvent } = useAnalytics();
  const [filters, setFilters] = useState({
    category: '',
    voltage: '',
    material: '',
  });

  const handleFilterChange = (filterType: string, value: string) => {
    const newFilters = {
      ...filters,
      [filterType]: value,
    };

    trackEvent(AnalyticsEvents.FILTER_APPLY, {
      filter_type: filterType,
      filter_value: value,
      filter_count: Object.values(newFilters).filter(Boolean).length,
      all_filters: newFilters,
    });

    setFilters(newFilters);
    // Apply filters
    // applyFilters(newFilters);
  };

  const handleClearFilters = () => {
    trackEvent(AnalyticsEvents.FILTER_CLEAR, {
      previous_filters: filters,
    });

    setFilters({
      category: '',
      voltage: '',
      material: '',
    });
    // Clear filters
    // clearFilters();
  };

  return (
    <div>
      <select onChange={(e) => handleFilterChange('category', e.target.value)}>
        <option value="">All Categories</option>
        <option value="cables">Cables</option>
        <option value="connectors">Connectors</option>
      </select>

      <button onClick={handleClearFilters}>Clear Filters</button>
    </div>
  );
}
```

---

## Content Tracking

### Blog Post View

```tsx
'use client';

import { useEffect } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

interface BlogPost {
  id: string;
  title: string;
  category: string;
  author: string;
}

function BlogPostPage({ post }: { post: BlogPost }) {
  const { trackEvent } = useAnalytics();

  useEffect(() => {
    trackEvent(AnalyticsEvents.BLOG_POST_VIEW, {
      post_id: post.id,
      post_title: post.title,
      post_category: post.category,
      post_author: post.author,
    });
  }, [post]);

  return (
    <article>
      <h1>{post.title}</h1>
      <p>By {post.author}</p>
      {/* Post content */}
    </article>
  );
}
```

### Video Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function VideoPlayer({ videoId, videoTitle }) {
  const { trackEvent } = useAnalytics();

  const handlePlay = () => {
    trackEvent(AnalyticsEvents.VIDEO_PLAY, {
      video_id: videoId,
      video_title: videoTitle,
    });
  };

  const handlePause = () => {
    trackEvent(AnalyticsEvents.VIDEO_PAUSE, {
      video_id: videoId,
      video_title: videoTitle,
    });
  };

  const handleComplete = () => {
    trackEvent(AnalyticsEvents.VIDEO_COMPLETE, {
      video_id: videoId,
      video_title: videoTitle,
    });
  };

  return (
    <video onPlay={handlePlay} onPause={handlePause} onEnded={handleComplete}>
      <source src="/video.mp4" type="video/mp4" />
    </video>
  );
}
```

### Download Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function DownloadButton({ fileName, fileType, fileSize }) {
  const { trackEvent } = useAnalytics();

  const handleDownload = () => {
    trackEvent(AnalyticsEvents.DOWNLOAD, {
      file_name: fileName,
      file_type: fileType,
      file_size: fileSize,
      download_source: 'product-page',
    });

    // Trigger download
    // window.location.href = `/downloads/${fileName}`;
  };

  return <button onClick={handleDownload}>Download {fileName}</button>;
}
```

---

## Error Tracking

### Error Boundary

```tsx
'use client';

import { Component, ErrorInfo, ReactNode } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

interface ErrorBoundaryProps {
  children: ReactNode;
  fallback?: ReactNode;
}

class ErrorBoundary extends Component<ErrorBoundaryProps> {
  state = { hasError: false, error: null };

  static getDerivedStateFromError(error: Error) {
    return { hasError: true, error };
  }

  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    const { trackEvent } = useAnalytics();

    trackEvent(AnalyticsEvents.ERROR, {
      error_message: error.message,
      error_stack: error.stack,
      error_component: errorInfo.componentStack,
      error_type: error.name,
    });
  }

  render() {
    if (this.state.hasError) {
      return this.props.fallback ?? <h1>Something went wrong.</h1>;
    }

    return this.props.children;
  }
}

// Usage
function App() {
  return (
    <ErrorBoundary>
      <MainContent />
    </ErrorBoundary>
  );
}
```

### API Error Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function ApiClient() {
  const { trackEvent } = useAnalytics();

  const fetchData = async (endpoint: string) => {
    try {
      const response = await fetch(endpoint);

      if (!response.ok) {
        trackEvent(AnalyticsEvents.API_ERROR, {
          endpoint: endpoint,
          status_code: response.status,
          error_message: response.statusText,
        });

        throw new Error(`HTTP ${response.status}`);
      }

      trackEvent(AnalyticsEvents.API_SUCCESS, {
        endpoint: endpoint,
        status_code: response.status,
      });

      return await response.json();
    } catch (error) {
      trackEvent(AnalyticsEvents.API_ERROR, {
        endpoint: endpoint,
        error_message: error.message,
        error_type: error.name,
      });

      throw error;
    }
  };

  return { fetchData };
}
```

---

## Performance Tracking

### Page Load Performance

```tsx
'use client';

import { useEffect } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function PerformanceTracker() {
  const { trackEvent } = useAnalytics();

  useEffect(() => {
    // Track page load performance
    if ('performance' in window) {
      const perfData = window.performance.timing;
      const pageLoadTime = perfData.loadEventEnd - perfData.navigationStart;

      trackEvent(AnalyticsEvents.PERFORMANCE, {
        metric: 'page_load_time',
        value: pageLoadTime,
        page: window.location.pathname,
      });
    }
  }, []);

  return null;
}
```

### Custom Performance Metrics

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function ComponentWithPerformance() {
  const { trackEvent } = useAnalytics();
  const [loadTime, setLoadTime] = useState(0);

  useEffect(() => {
    const startTime = performance.now();

    // Simulate some async work
    setTimeout(() => {
      const endTime = performance.now();
      const duration = endTime - startTime;

      setLoadTime(duration);

      trackEvent(AnalyticsEvents.PERFORMANCE, {
        metric: 'component_load_time',
        value: duration,
        component_name: 'ComponentWithPerformance',
      });
    }, 1000);
  }, []);

  return <div>Loaded in {loadTime}ms</div>;
}
```

---

## Custom Navigation

### SPA Navigation Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';

function SpaNavigation() {
  const { trackPageview } = useAnalytics();

  const navigateTo = (path: string) => {
    // Track the navigation
    trackPageview(path);

    // Perform navigation
    window.history.pushState({}, '', path);
    // Or use your router: router.push(path);
  };

  return (
    <nav>
      <button onClick={() => navigateTo('/products')}>Products</button>
      <button onClick={() => navigateTo('/about')}>About</button>
      <button onClick={() => navigateTo('/contact')}>Contact</button>
    </nav>
  );
}
```

### Modal Navigation

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function ModalWithTracking({ modalId, children }) {
  const { trackEvent, trackPageview } = useAnalytics();

  const openModal = () => {
    trackEvent(AnalyticsEvents.MODAL_OPEN, {
      modal_id: modalId,
    });

    // Track modal as a "page" view
    trackPageview(`/modal/${modalId}`);
  };

  const closeModal = () => {
    trackEvent(AnalyticsEvents.MODAL_CLOSE, {
      modal_id: modalId,
    });

    // Track return to previous page
    trackPageview(window.location.pathname);
  };

  return (
    <div>
      <button onClick={openModal}>Open Modal</button>
      <div className="modal">
        {children}
        <button onClick={closeModal}>Close</button>
      </div>
    </div>
  );
}
```

---

## Business-Specific Events

### KLZ Cables Specific Examples

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';

function CableProductPage({ cable }) {
  const { trackEvent } = useAnalytics();

  const handleTechnicalSpecDownload = () => {
    trackEvent('technical_spec_download', {
      cable_id: cable.id,
      cable_type: cable.type,
      cable_voltage: cable.voltage,
      cable_standard: cable.standard,
      document_type: 'datasheet',
    });
  };

  const handleRequestQuote = () => {
    trackEvent('quote_request', {
      cable_id: cable.id,
      cable_type: cable.type,
      cable_voltage: cable.voltage,
      cable_length: cable.length,
      cable_quantity: cable.quantity,
      project_type: cable.projectType,
      urgency: cable.urgency,
    });
  };

  const handleBrochureDownload = () => {
    trackEvent('brochure_download', {
      brochure_type: 'product',
      cable_category: cable.category,
      language: 'de',
    });
  };

  return (
    <div>
      <h1>{cable.name}</h1>
      <button onClick={handleTechnicalSpecDownload}>Download Technical Specs</button>
      <button onClick={handleRequestQuote}>Request Quote</button>
      <button onClick={handleBrochureDownload}>Download Brochure</button>
    </div>
  );
}
```

### Wind Farm Construction Tracking

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';

function WindFarmProjectPage({ project }) {
  const { trackEvent } = useAnalytics();

  const handleProjectInquiry = () => {
    trackEvent('project_inquiry', {
      project_type: 'wind_farm',
      project_location: project.location,
      project_size: project.size,
      project_stage: project.stage,
      cable_requirements: project.cableRequirements,
    });
  };

  const handleCableCalculation = () => {
    trackEvent('cable_calculation', {
      calculation_type: 'voltage_drop',
      cable_type: project.cableType,
      cable_length: project.cableLength,
      load_current: project.loadCurrent,
      result: project.calculationResult,
    });
  };

  return (
    <div>
      <h1>{project.name}</h1>
      <button onClick={handleProjectInquiry}>Request Project Consultation</button>
      <button onClick={handleCableCalculation}>Calculate Cable Requirements</button>
    </div>
  );
}
```

---

## Testing Analytics

### Mock Analytics for Tests

```tsx
// __tests__/analytics-mock.ts
export const mockAnalytics = {
  track: jest.fn(),
  trackPageview: jest.fn(),
};

jest.mock('@/lib/services/create-services', () => ({
  getAppServices: () => ({
    analytics: mockAnalytics,
  }),
}));

// Usage in tests
import { render, screen, fireEvent } from '@testing-library/react';
import { mockAnalytics } from './analytics-mock';
import { useAnalytics } from '@/components/analytics/useAnalytics';

test('tracks button click', () => {
  const TestComponent = () => {
    const { trackEvent } = useAnalytics();
    return <button onClick={() => trackEvent('test_event')}>Click</button>;
  };

  render(<TestComponent />);
  fireEvent.click(screen.getByText('Click'));

  expect(mockAnalytics.track).toHaveBeenCalledWith('test_event');
});
```

### Development Mode Testing

```tsx
// In development mode, check console logs:
// [Umami] Tracked event: product_add_to_cart { product_id: '123' }
// [Umami] Tracked pageview: /products/123

// To test without sending data to Umami:
// 1. Remove UMAMI_WEBSITE_ID from .env
// 2. Or set it to an empty string
// 3. Check console logs to verify events are being tracked
```

---

## Performance Tips

### 1. Debounce High-Frequency Events

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';
import { debounce } from 'lodash';

function SearchInput() {
  const { trackEvent } = useAnalytics();

  const debouncedTrack = debounce((query: string) => {
    trackEvent('search', { search_query: query });
  }, 500);

  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    debouncedTrack(e.target.value);
  };

  return <input onChange={handleChange} />;
}
```

### 2. Batch Events (if needed)

```tsx
'use client';

import { useAnalytics } from '@/components/analytics/useAnalytics';

function BatchTracker() {
  const { trackEvent } = useAnalytics();
  const eventQueue = useRef<Array<{ name: string; props: any }>>([]);

  const addToQueue = (name: string, props: any) => {
    eventQueue.current.push({ name, props });
  };

  const flushQueue = () => {
    eventQueue.current.forEach(({ name, props }) => {
      trackEvent(name, props);
    });
    eventQueue.current = [];
  };

  // Flush queue on page unload
  useEffect(() => {
    const handleBeforeUnload = () => flushQueue();
    window.addEventListener('beforeunload', handleBeforeUnload);
    return () => window.removeEventListener('beforeunload', handleBeforeUnload);
  }, []);

  return null;
}
```

### 3. Use Web Vitals for Performance

```tsx
'use client';

import { useEffect } from 'react';
import { useAnalytics } from '@/components/analytics/useAnalytics';
import { AnalyticsEvents } from '@/components/analytics/analytics-events';

function WebVitalsTracker() {
  const { trackEvent } = useAnalytics();

  useEffect(() => {
    // Track Core Web Vitals
    if ('PerformanceObserver' in window) {
      const observer = new PerformanceObserver((list) => {
        for (const entry of list.getEntries()) {
          if (entry.entryType === 'largest-contentful-paint') {
            trackEvent(AnalyticsEvents.PERFORMANCE, {
              metric: 'lcp',
              value: entry.startTime,
            });
          }
          if (entry.entryType === 'first-input-delay') {
            trackEvent(AnalyticsEvents.PERFORMANCE, {
              metric: 'fid',
              value: entry.processingStart - entry.startTime,
            });
          }
          if (entry.entryType === 'layout-shift') {
            trackEvent(AnalyticsEvents.PERFORMANCE, {
              metric: 'cls',
              value: entry.value,
            });
          }
        }
      });

      observer.observe({
        entryTypes: ['largest-contentful-paint', 'first-input-delay', 'layout-shift'],
      });
    }
  }, []);

  return null;
}
```

---

## Summary

This examples file demonstrates how to implement comprehensive analytics tracking for various scenarios:

- ✅ **Basic interactions** (buttons, links, forms)
- ✅ **E-commerce** (product views, cart, purchases)
- ✅ **User authentication** (login, signup, logout)
- ✅ **Search & filtering** (search queries, filter applications)
- ✅ **Content tracking** (blog posts, videos, downloads)
- ✅ **Error tracking** (error boundaries, API errors)
- ✅ **Performance tracking** (page loads, custom metrics)
- ✅ **Custom navigation** (SPA, modals)
- ✅ **Business-specific events** (KLZ Cables, wind farms)

Remember to:

1. Use the `useAnalytics` hook for client-side tracking
2. Import events from `AnalyticsEvents` for consistency
3. Include relevant context in your events
4. Respect privacy regulations (GDPR, etc.)
5. Test in development mode before deploying
