import React, { Component, ErrorInfo, ReactNode } from 'react';
import { toast } from 'sonner';

interface Props {
  children: ReactNode;
  fallback?: ReactNode;
  onError?: (error: Error, errorInfo: ErrorInfo) => void;
}

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

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: ErrorInfo) {
    console.error('ErrorBoundary caught an error:', error, errorInfo);
    
    // Show user-friendly error toast
    toast.error('Something went wrong. The page has been reset.', {
      duration: 5000,
    });

    // Call custom error handler if provided
    if (this.props.onError) {
      this.props.onError(error, errorInfo);
    }

    // Log to monitoring service in production
    if (process.env.NODE_ENV === 'production') {
      // TODO: Send to error monitoring service (Sentry, etc.)
      console.error('Production error:', {
        error: error.message,
        stack: error.stack,
        componentStack: errorInfo.componentStack,
        timestamp: new Date().toISOString(),
      });
    }
  }

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

      // Default fallback UI
      return (
        <div className="error-boundary-fallback">
          <div className="error-content">
            <h2>Oops! Something went wrong</h2>
            <p>We're sorry, but something unexpected happened.</p>
            <details className="error-details">
              <summary>Error details (for developers)</summary>
              <pre>{this.state.error?.stack}</pre>
            </details>
            <button 
              onClick={() => this.setState({ hasError: false, error: undefined })}
              className="retry-button"
            >
              Try Again
            </button>
            <button 
              onClick={() => window.location.reload()}
              className="reload-button"
            >
              Reload Page
            </button>
          </div>
        </div>
      );
    }

    return this.props.children;
  }
}

// Hook version for functional components
export const useErrorHandler = () => {
  return (error: Error, errorInfo?: any) => {
    console.error('Error caught by useErrorHandler:', error, errorInfo);
    toast.error('An error occurred. Please try again.', {
      duration: 4000,
    });
    
    if (process.env.NODE_ENV === 'production') {
      // TODO: Send to error monitoring service
      console.error('Production error from hook:', {
        error: error.message,
        stack: error.stack,
        timestamp: new Date().toISOString(),
      });
    }
  };
};