import React, { Component, ErrorInfo, ReactNode } from 'react';
import { AlertTriangle, RefreshCw } from 'lucide-react';

interface Props {
  children?: ReactNode;
}

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

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

  constructor(props: Props) {
    super(props);
    this.props = props;
  }

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

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

  public render() {
    if (this.state.hasError) {
      return (
        <div className="min-h-screen flex flex-col items-center justify-center bg-gray-50 p-4 text-center">
          <div className="w-16 h-16 bg-red-100 rounded-full flex items-center justify-center text-red-500 mb-4">
             <AlertTriangle className="w-8 h-8" />
          </div>
          <h1 className="text-2xl font-bold text-gray-800 mb-2">出错了</h1>
          <p className="text-gray-600 mb-6 max-w-xs">
            抱歉，系统遇到了一些问题。<br/>
            <span className="text-xs text-gray-400 mt-2 block font-mono bg-gray-100 p-2 rounded">
                {this.state.error?.message || 'Unknown Error'}
            </span>
          </p>
          <button
            className="flex items-center gap-2 px-6 py-3 bg-rose-600 text-white rounded-xl font-bold hover:bg-rose-700 transition-all shadow-lg"
            onClick={() => window.location.reload()}
          >
            <RefreshCw className="w-4 h-4" /> 刷新页面
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}