import org.slf4j.LoggerFactory;

import jcifs.smb.SmbException;

/**
 * Rate limiter for authentication attempts to prevent brute force attacks.
 *
 * Features:
 * - Per-account rate limiting
 * - Per-IP rate limiting
 * - Global rate limiting
 * - Exponential backoff for repeated failures
 * - Account lockout after threshold
 * - Automatic cleanup of old entries
 */
public class AuthenticationRateLimiter implements AutoCloseable {

    }
    
    // Check if we can use cached directory listing
    if (directoryLeaseManager != null && 
        directoryLeaseManager.canCacheDirectoryListing(getPath())) {
        
        List<SmbFile> cachedFiles = directoryLeaseManager.getCachedDirectoryListing(getPath());
        if (cachedFiles != null) {
            log.debug("Using cached directory listing for: {}", getPath());

                directoryCache.remove(directoryPath);
                return null;
            }
        }

        return entry;
    }

    /**
     * Check if directory listing can be cached
     *
     * @param directoryPath directory path
     * @return true if caching is allowed
     */
    public boolean canCacheDirectoryListing(String directoryPath) {

        assertFalse(cacheEntry.isComplete());

        // Step 3: Verify can cache directory listing
        assertTrue(directoryLeaseManager.canCacheDirectoryListing(directoryPath));

        // Step 4: Initially no cached listing
        assertNull(directoryLeaseManager.getCachedDirectoryListing(directoryPath));

        // Step 5: Simulate directory enumeration and update cache

    }

    /**
     * Configure rate limiting
     *
     * @param windowMs time window in milliseconds
     * @param maxEvents maximum events per window
     */
    public void setRateLimit(long windowMs, int maxEvents) {
        this.rateLimitWindow = windowMs;
        this.maxEventsPerWindow = maxEvents;
        log.info("Rate limiting set to {} events per {} ms", maxEvents, windowMs);
    }

        // Null username should be handled gracefully
        assertTrue(rateLimiter.checkAttempt(null, "192.168.1.8"), "Null username should be allowed");

        // Should not affect IP limiting
        rateLimiter.recordFailure(null, "192.168.1.8");
        assertTrue(rateLimiter.checkAttempt("realuser", "192.168.1.8"), "Should still track IP");
    }

    @Test

        it.close();
        verify(tree).send(argThat((Request<?> r) -> r instanceof Smb2CloseRequest));
    }

    @Test
    @DisplayName("open() gracefully handles NT_STATUS_NO_SUCH_FILE (empty listing)")
    void open_handles_no_such_file_and_yields_empty() throws Exception {
        // Setup required for this test
        when(parent.getLocator()).thenReturn(locator);

        verify(response).setHeader("WWW-Authenticate", "NTLM");
        verify(response).flushBuffer();
    }

    /**
     * Test doGet with NTLM authentication for directory listing
     * This test verifies the authentication flow without actual network operations
     */
    @Test
    void testDoGet_DirectoryListing() throws Exception {

        directoryLeaseManager.requestDirectoryLease(directoryPath, DirectoryLeaseState.DIRECTORY_READ_HANDLE,
                DirectoryCacheScope.IMMEDIATE_CHILDREN);

        // No cached listing initially
        assertNull(directoryLeaseManager.getCachedDirectoryListing(directoryPath));

        // Setup mock files
        when(mockFile1.getName()).thenReturn("file1.txt");

 *   <li>Appending alphanumeric characters (0-9, A-Z, a-z) to the buffer.</li>
 *   <li>Appending symbol characters (!-/, :-@, [-`, {-~) to the buffer.</li>
 *   <li>Optionally removing duplicate terms based on a flag.</li>
 *   <li>Limiting the maximum size of alphanumeric and symbol terms.</li>
 * </ul>
 *
 * <p>The {@link TextNormalizeContext} class provides a fluent API to configure the text