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

interface Props {
  children: ReactNode;
}

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

class ErrorBoundary extends Component<Props, State> {
  public state: State = {
    hasError: false,
  };

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

  public componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    console.error('ErrorBoundary caught error:', error, errorInfo);
  }

  public render() {
    if (this.state.hasError) {
      return (
        <div className="min-h-screen bg-[#060a08] text-white flex flex-col items-center justify-center p-6 text-center">
          <h1 className="font-display-serif text-3xl font-bold text-emerald-400 mb-2">
            GB STUDY
          </h1>
          <p className="text-sm text-slate-300 mb-5 max-w-sm">
            Something went wrong while rendering. Please reload the page to continue studying.
          </p>
          <button
            type="button"
            onClick={() => window.location.reload()}
            className="px-5 py-2.5 rounded-xl bg-emerald-500 hover:bg-emerald-400 text-[#060a08] font-bold text-xs uppercase tracking-wider cursor-pointer transition-colors"
          >
            Reload Page
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}

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