import React, { StrictMode, ReactNode, ErrorInfo } from 'react';
import { createRoot } from 'react-dom/client';
import App from './App.tsx';
import './index.css';

interface ErrorBoundaryProps {
  children: ReactNode;
}

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

class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoundaryState> {
  state: ErrorBoundaryState;
  props: ErrorBoundaryProps;

  constructor(props: ErrorBoundaryProps) {
    super(props);
    this.props = props;
    this.state = { hasError: false, error: null };
  }

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

  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    console.error("Uncaught app error:", error, errorInfo);
  }

  render() {
    if (this.state.hasError) {
      return (
        <div style={{ padding: '2rem', color: '#fff', backgroundColor: '#0f172a', minHeight: '100vh', fontFamily: 'sans-serif' }}>
          <h2 style={{ color: '#ef4444', marginBottom: '0.5rem' }}>FleetOps Application Error</h2>
          <p style={{ color: '#94a3b8', fontSize: '0.875rem' }}>{this.state.error?.message || 'An unexpected error occurred during rendering.'}</p>
          <button 
            onClick={() => window.location.reload()}
            style={{ marginTop: '1rem', padding: '0.5rem 1rem', background: '#3b82f6', color: '#fff', border: 'none', borderRadius: '0.375rem', cursor: 'pointer', fontWeight: 'bold' }}
          >
            Reload Application
          </button>
        </div>
      );
    }
    return this.props.children;
  }
}



createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <ErrorBoundary>
      <App />
    </ErrorBoundary>
  </StrictMode>,
);