import React, { Component, type ReactNode } from 'react';

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

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

/**
 * Concise Error Boundary following DRY principles
 */
export 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: React.ErrorInfo) {
    // Simplified error reporting
    console.error('UI Error:', error, errorInfo);
    
    // Optional: Report to backend
    fetch('/api/error-report', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        error: error.message,
        stack: error.stack,
        timestamp: new Date().toISOString()
      })
    }).catch(() => {}); // Silent fail for error reporting
  }

  render() {
    if (this.state.hasError) {
      return this.props.fallback || (
        <div className="flex flex-col items-center justify-center min-h-[200px] p-6 bg-red-50 border border-red-200 rounded-lg">
          <div className="text-4xl text-red-500 mb-4">⚠️</div>
          <h2 className="text-lg font-semibold text-red-700 mb-2">Something went wrong</h2>
          <p className="text-sm text-red-600 mb-4 text-center">
            The chat component encountered an error. Please refresh the page and try again.
          </p>
          <button
            onClick={() => this.setState({ hasError: false, error: undefined })}
            className="flex items-center gap-2 px-4 py-2 bg-red-600 text-white rounded-md hover:bg-red-700"
          >
            🔄 Retry
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}
