/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.security.web.debug;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Matchers.anyString;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.Collections;

import javax.servlet.FilterChain;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import org.mockito.Mock;
import org.powermock.core.classloader.annotations.PrepareOnlyThisForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.powermock.reflect.internal.WhiteboxImpl;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.security.web.FilterChainProxy;

/**
 *
 * @author Rob Winch
 *
 */
@RunWith(PowerMockRunner.class)
@PrepareOnlyThisForTest(Logger.class)
public class DebugFilterTest {
	@Captor
	private ArgumentCaptor<HttpServletRequest> requestCaptor;
	@Captor
	private ArgumentCaptor<String> logCaptor;

	@Mock
	private HttpServletRequest request;
	@Mock
	private HttpServletResponse response;
	@Mock
	private FilterChain filterChain;
	@Mock
	private FilterChainProxy fcp;
	@Mock
	private Logger logger;

	private String requestAttr;

	private DebugFilter filter;

	@Before
	public void setUp() {
		when(request.getHeaderNames()).thenReturn(
				Collections.enumeration(Collections.<String> emptyList()));
		when(request.getServletPath()).thenReturn("/login");
		filter = new DebugFilter(fcp);
		WhiteboxImpl.setInternalState(filter, Logger.class, logger);
		requestAttr = WhiteboxImpl.getInternalState(filter, "ALREADY_FILTERED_ATTR_NAME",
				filter.getClass());
	}

	@Test
	public void doFilterProcessesRequests() throws Exception {
		filter.doFilter(request, response, filterChain);

		verify(logger).info(anyString());
		verify(request).setAttribute(requestAttr, Boolean.TRUE);
		verify(fcp).doFilter(requestCaptor.capture(), eq(response), eq(filterChain));
		assertThat(requestCaptor.getValue().getClass()).isEqualTo(DebugRequestWrapper.class);
		verify(request).removeAttribute(requestAttr);
	}

	// SEC-1901
	@Test
	public void doFilterProcessesForwardedRequests() throws Exception {
		when(request.getAttribute(requestAttr)).thenReturn(Boolean.TRUE);
		HttpServletRequest request = new DebugRequestWrapper(this.request);

		filter.doFilter(request, response, filterChain);

		verify(logger).info(anyString());
		verify(fcp).doFilter(request, response, filterChain);
		verify(this.request, never()).removeAttribute(requestAttr);
	}

	@Test
	public void doFilterDoesNotWrapWithDebugRequestWrapperAgain() throws Exception {
		when(request.getAttribute(requestAttr)).thenReturn(Boolean.TRUE);
		HttpServletRequest fireWalledRequest = new HttpServletRequestWrapper(
				new DebugRequestWrapper(this.request));

		filter.doFilter(fireWalledRequest, response, filterChain);

		verify(fcp).doFilter(fireWalledRequest, response, filterChain);
	}

	@Test
	public void doFilterLogsProperly() throws Exception {
		MockHttpServletRequest request = new MockHttpServletRequest();
		request.setMethod("GET");
		request.setServletPath("/path");
		request.setPathInfo("/");
		request.addHeader("A", "A Value");
		request.addHeader("A", "Another Value");
		request.addHeader("B", "B Value");

		filter.doFilter(request, response, filterChain);

		verify(logger).info(logCaptor.capture());

		assertThat(logCaptor.getValue()).isEqualTo(
				"Request received for GET '/path/':\n" + "\n" + request + "\n" + "\n"
						+ "servletPath:/path\n" + "pathInfo:/\n" + "headers: \n"
						+ "A: A Value, Another Value\n" + "B: B Value\n" + "\n" + "\n"
						+ "Security filter chain: no match");
	}
}
