leocrm/frontend/src/components/ErrorBoundary.tsx

import React from 'react';
import { logError } from '@/utils/errorLogger';

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

interface ErrorBoundaryState {
  hasError: boolean;
  error: Error | null;
}

/**
 * App-wide ErrorBoundary that catches React rendering errors
 * and displays a fallback UI with a reload button.
 */
export class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoundaryState> {
  constructor(props: ErrorBoundaryProps) {
    super(props);
    this.state = { hasError: false, error: null };
  }

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

  componentDidCatch(error: Error, errorInfo: React.ErrorInfo): void {
    console.error('[ErrorBoundary] Uncaught error:', error, errorInfo);
    logError(error, { componentStack: errorInfo.componentStack, source: 'ErrorBoundary' });
  }

  handleReload = (): void => {
    window.location.reload();
  };

  render(): React.ReactNode {
    if (this.state.hasError) {
      if (this.props.fallback) {
        return this.props.fallback;
      }

      return (
        <div
          className="flex items-center justify-center min-h-screen bg-secondary-50 p-8"
          role="alert"
        >
          <div className="max-w-md w-full bg-white rounded-lg shadow-lg p-8 text-center">
            <div className="text-red-500 text-6xl mb-4" aria-hidden="true">
              ⚠️
            </div>
            <h1 className="text-2xl font-bold text-secondary-900 mb-2">
              Ein Fehler ist aufgetreten
            </h1>
            <p className="text-secondary-600 mb-6">
              Die Anwendung konnte nicht geladen werden. Bitte versuchen Sie es erneut.
            </p>
            {this.state.error && (
              <details className="mb-6 text-left">
                <summary className="cursor-pointer text-sm text-secondary-500 hover:text-secondary-700">
                  Fehlerdetails
                </summary>
                <pre className="mt-2 p-3 bg-secondary-100 rounded text-xs text-secondary-700 overflow-auto max-h-32">
                  {this.state.error.message}
                  {this.state.error.stack && `\n\n${this.state.error.stack}`}
                </pre>
              </details>
            )}
            <button
              onClick={this.handleReload}
              className="inline-flex items-center px-6 py-3 bg-primary-600 text-white font-medium rounded-lg hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-primary-500 focus:ring-offset-2 transition-colors"
            >
              Neu laden
            </button>
          </div>
        </div>
      );
    }

    return this.props.children;
  }
}

export default ErrorBoundary;