import React from 'react';
import ReactDOM from 'react-dom/client';
import App from './App.jsx';
import './styles.css';

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

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

  render() {
    if (this.state.hasError) {
      return (
        <div className="error-shell">
          <div className="error-card">
            <div className="eyebrow">MathEDU runtime error</div>
            <h1>The React app hit an error.</h1>
            <p>
              This screen is here so you do not get a blank page. Open your browser console and copy the
              error message if you want me to debug the exact issue.
            </p>
            <pre>{String(this.state.error)}</pre>
          </div>
        </div>
      );
    }

    return this.props.children;
  }
}

const root = document.getElementById('root');

ReactDOM.createRoot(root).render(
  <React.StrictMode>
    <ErrorBoundary>
      <App />
    </ErrorBoundary>
  </React.StrictMode>,
);