// ErrorBoundary.js
import React, { Component } from 'react';

class ErrorBoundary extends Component {
  constructor(props) {
    super(props);
    this.state = { hasError: false };
  }

  static getDerivedStateFromError(error) {
    // Update state to show fallback UI
    return { hasError: true };
  }

  componentDidCatch(error, errorInfo) {
    // Log error to external service (e.g., Sentry, LogRocket)
    console.error('ErrorBoundary caught:', error, errorInfo);
    // You can also send to analytics here
  }

  render() {
    if (this.state.hasError) {
      // Custom fallback UI
      return (
        <div className="error-boundary">
          <h2>Something went wrong.</h2>
          <p>Please try refreshing the page or contact support if the issue persists.</p>
          <button onClick={() => window.location.reload()}>Try again</button>
        </div>
      );
    }

    return this.props.children;
  }
}

export default ErrorBoundary;

// Usage example (e.g., in a dashboard)
// <ErrorBoundary>
//   <StockTickerWidget /> {/* Isolated component – if it fails, others remain functional */}
// </ErrorBoundary>
// 
// <ErrorBoundary>
//   <PaymentForm /> {/* Critical section – failure shows retry UI without breaking nav/header */}
// </ErrorBoundary>