leggen/frontend/src/components/ErrorBoundary.tsx

import { Component } from "react";
import type { ErrorInfo, ReactNode } from "react";
import { AlertTriangle, RefreshCw } from "lucide-react";

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

interface State {
  hasError: boolean;
  error?: Error;
  errorInfo?: ErrorInfo;
}

class ErrorBoundary extends Component<Props, State> {
  constructor(props: Props) {
    super(props);
    this.state = { hasError: false };
  }

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

  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    console.error("ErrorBoundary caught an error:", error, errorInfo);
    this.setState({ error, errorInfo });
  }

  handleReset = () => {
    this.setState({ hasError: false, error: undefined, errorInfo: undefined });
  };

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

      return (
        <div className="bg-white rounded-lg shadow p-6">
          <div className="flex items-center justify-center text-center">
            <div>
              <AlertTriangle className="h-12 w-12 text-red-400 mx-auto mb-4" />
              <h3 className="text-lg font-medium text-gray-900 mb-2">
                Something went wrong
              </h3>
              <p className="text-gray-600 mb-4">
                An error occurred while rendering this component. Please try
                refreshing or check the console for more details.
              </p>

              {this.state.error && (
                <div className="bg-red-50 border border-red-200 rounded-md p-3 mb-4 text-left">
                  <p className="text-sm font-mono text-red-800">
                    <strong>Error:</strong> {this.state.error.message}
                  </p>
                  {this.state.error.stack && (
                    <details className="mt-2">
                      <summary className="text-sm text-red-600 cursor-pointer">
                        Stack trace
                      </summary>
                      <pre className="text-xs text-red-700 mt-1 whitespace-pre-wrap">
                        {this.state.error.stack}
                      </pre>
                    </details>
                  )}
                </div>
              )}

              <button
                onClick={this.handleReset}
                className="inline-flex items-center px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 transition-colors"
              >
                <RefreshCw className="h-4 w-4 mr-2" />
                Try Again
              </button>
            </div>
          </div>
        </div>
      );
    }

    return this.props.children;
  }
}

export default ErrorBoundary;