/*
 * Copyright 2004-present 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
 *
 *      https://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.test.web.servlet.request;

import java.io.IOException;

import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import org.springframework.mock.web.MockFilterChain;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.web.authentication.www.DigestAuthenticationEntryPoint;
import org.springframework.security.web.authentication.www.DigestAuthenticationFilter;

import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.digest;

public class SecurityMockMvcRequestPostProcessorsDigestTests {

	private DigestAuthenticationFilter filter;

	private MockHttpServletRequest request;

	private String username;

	private String password;

	private DigestAuthenticationEntryPoint entryPoint;

	@BeforeEach
	public void setup() {
		this.password = "password";
		this.request = new MockHttpServletRequest();
		this.entryPoint = new DigestAuthenticationEntryPoint();
		this.entryPoint.setKey("key");
		this.entryPoint.setRealmName("Spring Security");
		this.filter = new DigestAuthenticationFilter();
		this.filter.setUserDetailsService(
				(username) -> new User(username, this.password, AuthorityUtils.createAuthorityList("ROLE_USER")));
		this.filter.setAuthenticationEntryPoint(this.entryPoint);
		this.filter.afterPropertiesSet();
	}

	@AfterEach
	public void cleanup() {
		SecurityContextHolder.clearContext();
	}

	@Test
	public void digestWithFilter() throws Exception {
		MockHttpServletRequest postProcessedRequest = digest().postProcessRequest(this.request);
		assertThat(extractUser()).isEqualTo("user");
	}

	@Test
	public void digestWithFilterCustomUsername() throws Exception {
		String username = "admin";
		MockHttpServletRequest postProcessedRequest = digest(username).postProcessRequest(this.request);
		assertThat(extractUser()).isEqualTo(username);
	}

	@Test
	public void digestWithFilterCustomPassword() throws Exception {
		String username = "custom";
		this.password = "secret";
		MockHttpServletRequest postProcessedRequest = digest(username).password(this.password)
			.postProcessRequest(this.request);
		assertThat(extractUser()).isEqualTo(username);
	}

	@Test
	public void digestWithFilterCustomRealm() throws Exception {
		String username = "admin";
		this.entryPoint.setRealmName("Custom");
		MockHttpServletRequest postProcessedRequest = digest(username).realm(this.entryPoint.getRealmName())
			.postProcessRequest(this.request);
		assertThat(extractUser()).isEqualTo(username);
	}

	@Test
	public void digestWithFilterFails() throws Exception {
		String username = "admin";
		MockHttpServletRequest postProcessedRequest = digest(username).realm("Invalid")
			.postProcessRequest(this.request);
		assertThat(extractUser()).isNull();
	}

	private String extractUser() throws IOException, ServletException {
		this.filter.doFilter(this.request, new MockHttpServletResponse(), new MockFilterChain() {
			@Override
			public void doFilter(ServletRequest request, ServletResponse response) {
				Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
				SecurityMockMvcRequestPostProcessorsDigestTests.this.username = (authentication != null)
						? authentication.getName() : null;
			}
		});
		return this.username;
	}

}
