/*
 * 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.config.web.server;

import org.junit.jupiter.api.Test;

import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.web.reactive.ServerHttpSecurityConfigurationBuilder;
import org.springframework.security.test.web.reactive.server.WebTestClientBuilder;
import org.springframework.test.web.reactive.server.WebTestClient;

import static org.assertj.core.api.Assertions.assertThatIllegalStateException;

/**
 * @author Rob Winch
 * @since 5.0
 */
public class AuthorizeExchangeSpecTests {

	ServerHttpSecurity http = ServerHttpSecurityConfigurationBuilder.httpWithDefaultAuthentication();

	@Test
	public void antMatchersWhenMethodAndPatternsThenDiscriminatesByMethod() {
		this.http.csrf((csrf) -> csrf.disable())
			.authorizeExchange((authorize) -> authorize.pathMatchers(HttpMethod.POST, "/a", "/b")
				.denyAll()
				.anyExchange()
				.permitAll());
		WebTestClient client = buildClient();
		// @formatter:off
		client.get()
				.uri("/a")
				.exchange()
				.expectStatus().isOk();
		client.get()
				.uri("/b")
				.exchange()
				.expectStatus().isOk();
		client.post()
				.uri("/a")
				.exchange()
				.expectStatus().isUnauthorized();
		client.post()
				.uri("/b")
				.exchange()
				.expectStatus().isUnauthorized();
		// @formatter:on
	}

	@Test
	public void antMatchersWhenPatternsThenAnyMethod() {
		this.http.csrf((csrf) -> csrf.disable())
			.authorizeExchange((authorize) -> authorize.pathMatchers("/a", "/b").denyAll().anyExchange().permitAll());
		WebTestClient client = buildClient();
		// @formatter:off
		client.get()
				.uri("/a")
				.exchange()
				.expectStatus().isUnauthorized();
		client.get()
				.uri("/b")
				.exchange()
				.expectStatus().isUnauthorized();
		client.post()
				.uri("/a")
				.exchange()
				.expectStatus().isUnauthorized();
		client.post()
				.uri("/b")
				.exchange()
				.expectStatus().isUnauthorized();
		// @formatter:on
	}

	@Test
	public void antMatchersWhenPatternsInLambdaThenAnyMethod() {
		this.http.csrf(ServerHttpSecurity.CsrfSpec::disable)
			.authorizeExchange((authorize) -> authorize.pathMatchers("/a", "/b").denyAll().anyExchange().permitAll());
		WebTestClient client = buildClient();
		// @formatter:off
		client.get()
				.uri("/a")
				.exchange()
				.expectStatus().isUnauthorized();
		client.get()
				.uri("/b")
				.exchange()
				.expectStatus().isUnauthorized();
		client.post()
				.uri("/a")
				.exchange()
				.expectStatus().isUnauthorized();
		client.post()
				.uri("/b")
				.exchange()
				.expectStatus().isUnauthorized();
		// @formatter:on
	}

	@Test
	public void antMatchersWhenNoAccessAndAnotherMatcherThenThrowsException() {
		this.http.authorizeExchange((authorize) -> authorize.pathMatchers("/incomplete"));
		assertThatIllegalStateException()
			.isThrownBy(() -> this.http.authorizeExchange((authorize) -> authorize.pathMatchers("/throws-exception")));
	}

	@Test
	public void anyExchangeWhenFollowedByMatcherThenThrowsException() {
		assertThatIllegalStateException().isThrownBy(() ->
		// @formatter:off
			this.http.authorizeExchange((authorize) -> authorize
				.anyExchange().denyAll()
				.pathMatchers("/never-reached"))
		// @formatter:on
		);
	}

	@Test
	public void buildWhenMatcherDefinedWithNoAccessThenThrowsException() {
		this.http.authorizeExchange((authorize) -> authorize.pathMatchers("/incomplete"));
		assertThatIllegalStateException().isThrownBy(this.http::build);
	}

	@Test
	public void buildWhenMatcherDefinedWithNoAccessInLambdaThenThrowsException() {
		this.http.authorizeExchange((authorize) -> authorize.pathMatchers("/incomplete"));
		assertThatIllegalStateException().isThrownBy(this.http::build);
	}

	private WebTestClient buildClient() {
		return WebTestClientBuilder.bindToWebFilters(this.http.build()).build();
	}

}
