import { Component, type ErrorInfo, type ReactNode } from "react";

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

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

/** React Error Boundary */
export class ErrorBoundary extends Component<Props, State> {
  constructor(props: Props) {
    super(props);
    this.state = { hasError: false, error: null };
  }

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

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

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

      return (
        <div className="flex min-h-screen flex-col items-center justify-center gap-4 p-6">
          <h1 className="text-2xl font-bold text-destructive">오류가 발생했습니다</h1>
          <p className="text-muted-foreground">
            {this.state.error?.message ?? "알 수 없는 오류"}
          </p>
          <button
            onClick={() => window.location.reload()}
            className="rounded-lg bg-primary px-4 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90"
          >
            새로고침
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}