/*
 * 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.ldap;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import org.springframework.ldap.core.AuthenticationSource;
import org.springframework.ldap.support.LdapNameBuilder;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.TestingAuthenticationToken;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextHolderStrategy;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.ldap.authentication.SpringSecurityAuthenticationSource;
import org.springframework.security.ldap.userdetails.LdapUserDetailsImpl;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

/**
 * @author Luke Taylor
 */
public class SpringSecurityAuthenticationSourceTests {

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

	@Test
	public void principalAndCredentialsAreEmptyWithNoAuthentication() {
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		assertThat(source.getPrincipal()).isEqualTo("");
		assertThat(source.getCredentials()).isEqualTo("");
	}

	@Test
	public void credentialsAreEmptyWithNullCredentials() {
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		SecurityContextHolder.getContext()
			.setAuthentication(
					new AnonymousAuthenticationToken("key", "anonUser", AuthorityUtils.createAuthorityList("ignored")));
		assertThat(source.getCredentials()).isEqualTo("");
	}

	@Test
	public void principalIsEmptyForAnonymousUser() {
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		SecurityContextHolder.getContext()
			.setAuthentication(
					new AnonymousAuthenticationToken("key", "anonUser", AuthorityUtils.createAuthorityList("ignored")));
		assertThat(source.getPrincipal()).isEqualTo("");
	}

	@Test
	public void getPrincipalRejectsNonLdapUserDetailsObject() {
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		SecurityContextHolder.getContext().setAuthentication(new TestingAuthenticationToken(new Object(), "password"));
		assertThatIllegalArgumentException().isThrownBy(source::getPrincipal);
	}

	@Test
	public void expectedCredentialsAreReturned() {
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		SecurityContextHolder.getContext().setAuthentication(new TestingAuthenticationToken(new Object(), "password"));
		assertThat(source.getCredentials()).isEqualTo("password");
	}

	@Test
	public void expectedPrincipalIsReturned() {
		LdapUserDetailsImpl.Essence user = new LdapUserDetailsImpl.Essence();
		user.setUsername("joe");
		user.setDn(LdapNameBuilder.newInstance("uid=joe,ou=users").build());
		AuthenticationSource source = new SpringSecurityAuthenticationSource();
		SecurityContextHolder.getContext()
			.setAuthentication(new TestingAuthenticationToken(user.createUserDetails(), null));
		assertThat(source.getPrincipal()).isEqualTo("uid=joe,ou=users");
	}

	@Test
	public void getPrincipalWhenCustomSecurityContextHolderStrategyThenExpectedPrincipalIsReturned() {
		LdapUserDetailsImpl.Essence user = new LdapUserDetailsImpl.Essence();
		user.setUsername("joe");
		user.setDn(LdapNameBuilder.newInstance("uid=joe,ou=users").build());
		SecurityContextHolderStrategy strategy = mock(SecurityContextHolderStrategy.class);
		given(strategy.getContext())
			.willReturn(new SecurityContextImpl(new TestingAuthenticationToken(user.createUserDetails(), null)));
		SpringSecurityAuthenticationSource source = new SpringSecurityAuthenticationSource();
		source.setSecurityContextHolderStrategy(strategy);
		assertThat(source.getPrincipal()).isEqualTo("uid=joe,ou=users");
		verify(strategy).getContext();
	}

}
