'use client';

import { useEffect } from 'react';
import { useRouter, useSearchParams } from 'next/navigation';

interface TokenHandlerProps {
  redirectPath?: string; // Path to redirect after storing token
  tokenParamName?: string; // Name of the URL parameter containing the token
  storageKey?: string; // Key to use when storing in localStorage
}

/**
 * Client component that extracts a token from URL parameters and stores it in localStorage
 * 
 * @param redirectPath - Path to redirect after storing token (default: '/')
 * @param tokenParamName - Name of the URL parameter containing the token (default: 'token')
 * @param storageKey - Key to use when storing in localStorage (default: 'auth_token')
 */
const TokenHandler = ({
  redirectPath = '/',
  tokenParamName = 'token',
  storageKey = 'surfsense_bearer_token'
}: TokenHandlerProps) => {
  const router = useRouter();
  const searchParams = useSearchParams();

  useEffect(() => {
    // Only run on client-side
    if (typeof window === 'undefined') return;

    // Get token from URL parameters
    const token = searchParams.get(tokenParamName);

    if (token) {
      try {
        // Store token in localStorage
        localStorage.setItem(storageKey, token);
        // console.log(`Token stored in localStorage with key: ${storageKey}`);
        
        // Redirect to specified path
        router.push(redirectPath);
      } catch (error) {
        console.error('Error storing token in localStorage:', error);
      }
    }
  }, [searchParams, tokenParamName, storageKey, redirectPath, router]);

  return (
    <div className="flex items-center justify-center min-h-[200px]">
      <p className="text-gray-500">Processing authentication...</p>
    </div>
  );
};

export default TokenHandler;