/*
 * Copyright 2002-2020 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.oauth2.server.resource.authentication;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import reactor.core.publisher.Mono;

import org.springframework.security.authentication.TestingAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
import org.springframework.security.oauth2.jwt.BadJwtException;
import org.springframework.security.oauth2.jwt.Jwt;
import org.springframework.security.oauth2.jwt.JwtException;
import org.springframework.security.oauth2.jwt.ReactiveJwtDecoder;
import org.springframework.security.oauth2.jwt.TestJwts;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.given;

/**
 * @author Rob Winch
 * @since 5.1
 */
@ExtendWith(MockitoExtension.class)
public class JwtReactiveAuthenticationManagerTests {

	@Mock
	private ReactiveJwtDecoder jwtDecoder;

	private JwtReactiveAuthenticationManager manager;

	private Jwt jwt;

	@BeforeEach
	public void setup() {
		this.manager = new JwtReactiveAuthenticationManager(this.jwtDecoder);
		// @formatter:off
		this.jwt = TestJwts.jwt()
				.claim("scope", "message:read message:write")
				.build();
		// @formatter:on
	}

	@Test
	public void constructorWhenJwtDecoderNullThenIllegalArgumentException() {
		this.jwtDecoder = null;
		// @formatter:off
		assertThatIllegalArgumentException()
				.isThrownBy(() -> new JwtReactiveAuthenticationManager(this.jwtDecoder));
		// @formatter:on
	}

	@Test
	public void authenticateWhenWrongTypeThenEmpty() {
		TestingAuthenticationToken token = new TestingAuthenticationToken("foo", "bar");
		assertThat(this.manager.authenticate(token).block()).isNull();
	}

	@Test
	public void authenticateWhenEmptyJwtThenEmpty() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(token.getToken())).willReturn(Mono.empty());
		assertThat(this.manager.authenticate(token).block()).isNull();
	}

	@Test
	public void authenticateWhenJwtExceptionThenOAuth2AuthenticationException() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(any())).willReturn(Mono.error(new BadJwtException("Oops")));
		assertThatExceptionOfType(OAuth2AuthenticationException.class)
				.isThrownBy(() -> this.manager.authenticate(token).block());
	}

	// gh-7549
	@Test
	public void authenticateWhenDecoderThrowsIncompatibleErrorMessageThenWrapsWithGenericOne() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(token.getToken())).willThrow(new BadJwtException("with \"invalid\" chars"));
		// @formatter:off
		assertThatExceptionOfType(OAuth2AuthenticationException.class)
				.isThrownBy(() -> this.manager.authenticate(token).block())
				.satisfies((ex) -> assertThat(ex)
						.hasFieldOrPropertyWithValue("error.description", "Invalid token")
				);
		// @formatter:on
	}

	// gh-7785
	@Test
	public void authenticateWhenDecoderFailsGenericallyThenThrowsGenericException() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(token.getToken())).willThrow(new JwtException("no jwk set"));
		// @formatter:off
		assertThatExceptionOfType(AuthenticationException.class)
				.isThrownBy(() -> this.manager.authenticate(token).block())
				.isNotInstanceOf(OAuth2AuthenticationException.class);
		// @formatter:on
	}

	@Test
	public void authenticateWhenNotJwtExceptionThenPropagates() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(any())).willReturn(Mono.error(new RuntimeException("Oops")));
		// @formatter:off
		assertThatExceptionOfType(RuntimeException.class)
				.isThrownBy(() -> this.manager.authenticate(token).block());
		// @formatter:on
	}

	@Test
	public void authenticateWhenJwtThenSuccess() {
		BearerTokenAuthenticationToken token = new BearerTokenAuthenticationToken("token-1");
		given(this.jwtDecoder.decode(token.getToken())).willReturn(Mono.just(this.jwt));
		Authentication authentication = this.manager.authenticate(token).block();
		assertThat(authentication).isNotNull();
		assertThat(authentication.isAuthenticated()).isTrue();
		// @formatter:off
		assertThat(authentication.getAuthorities())
				.extracting(GrantedAuthority::getAuthority)
				.containsOnly("SCOPE_message:read", "SCOPE_message:write");
		// @formatter:on
	}

}
