/*
 * 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.apache.http.HttpHeaders;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
import org.springframework.security.config.test.SpringTestContext;
import org.springframework.security.config.test.SpringTestContextExtension;
import org.springframework.security.web.PortMapper;
import org.springframework.security.web.server.SecurityWebFilterChain;
import org.springframework.security.web.server.util.matcher.PathPatternParserServerWebExchangeMatcher;
import org.springframework.test.web.reactive.server.WebTestClient;
import org.springframework.web.reactive.config.EnableWebFlux;

import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;
import static org.springframework.security.config.Customizer.withDefaults;

/**
 * Tests for {@link HttpsRedirectSpecTests}
 *
 * @author Josh Cummings
 */
@ExtendWith(SpringTestContextExtension.class)
public class HttpsRedirectSpecTests {

	public final SpringTestContext spring = new SpringTestContext(this);

	WebTestClient client;

	@Autowired
	public void setApplicationContext(ApplicationContext context) {
		// @formatter:off
		this.client = WebTestClient
				.bindToApplicationContext(context)
				.build();
		// @formatter:on
	}

	@Test
	public void getWhenSecureThenDoesNotRedirect() {
		this.spring.register(RedirectToHttpConfig.class).autowire();
		// @formatter:off
		this.client.get()
				.uri("https://localhost")
				.exchange()
				.expectStatus().isNotFound();
		// @formatter:on
	}

	@Test
	public void getWhenInsecureThenRespondsWithRedirectToSecure() {
		this.spring.register(RedirectToHttpConfig.class).autowire();
		// @formatter:off
		this.client.get()
				.uri("http://localhost")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost");
		// @formatter:on
	}

	@Test
	public void getWhenInsecureAndRedirectConfiguredInLambdaThenRespondsWithRedirectToSecure() {
		this.spring.register(RedirectToHttpsInLambdaConfig.class).autowire();
		// @formatter:off
		this.client.get()
				.uri("http://localhost")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost");
		// @formatter:on
	}

	@Test
	public void getWhenInsecureAndPathRequiresTransportSecurityThenRedirects() {
		this.spring.register(SometimesRedirectToHttpsConfig.class).autowire();
		// @formatter:off
		this.client.get()
				.uri("http://localhost:8080")
				.exchange()
				.expectStatus().isNotFound();
		this.client.get()
				.uri("http://localhost:8080/secure")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost:8443/secure");
		// @formatter:on
	}

	@Test
	public void getWhenInsecureAndPathRequiresTransportSecurityInLambdaThenRedirects() {
		this.spring.register(SometimesRedirectToHttpsInLambdaConfig.class).autowire();
		// @formatter:off
		this.client.get()
				.uri("http://localhost:8080")
				.exchange()
				.expectStatus().isNotFound();
		this.client.get()
				.uri("http://localhost:8080/secure")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost:8443/secure");
		// @formatter:on
	}

	@Test
	public void getWhenInsecureAndUsingCustomPortMapperThenRespondsWithRedirectToSecurePort() {
		this.spring.register(RedirectToHttpsViaCustomPortsConfig.class).autowire();
		PortMapper portMapper = this.spring.getContext().getBean(PortMapper.class);
		given(portMapper.lookupHttpsPort(4080)).willReturn(4443);
		// @formatter:off
		this.client.get()
				.uri("http://localhost:4080")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost:4443");
		// @formatter:on
	}

	@Test
	public void getWhenInsecureAndUsingCustomPortMapperInLambdaThenRespondsWithRedirectToSecurePort() {
		this.spring.register(RedirectToHttpsViaCustomPortsInLambdaConfig.class).autowire();
		PortMapper portMapper = this.spring.getContext().getBean(PortMapper.class);
		given(portMapper.lookupHttpsPort(4080)).willReturn(4443);
		// @formatter:off
		this.client.get()
				.uri("http://localhost:4080")
				.exchange()
				.expectStatus().isFound()
				.expectHeader().valueEquals(HttpHeaders.LOCATION, "https://localhost:4443");
		// @formatter:on
	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class RedirectToHttpConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps(withDefaults());
			// @formatter:on
			return http.build();
		}

	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class RedirectToHttpsInLambdaConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps(withDefaults());
			// @formatter:on
			return http.build();
		}

	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class SometimesRedirectToHttpsConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps((https) -> https
					.httpsRedirectWhen(new PathPatternParserServerWebExchangeMatcher("/secure")));
			// @formatter:on
			return http.build();
		}

	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class SometimesRedirectToHttpsInLambdaConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps((redirectToHttps) -> redirectToHttps
						.httpsRedirectWhen(new PathPatternParserServerWebExchangeMatcher("/secure"))
				);
			// @formatter:on
			return http.build();
		}

	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class RedirectToHttpsViaCustomPortsConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps((https) -> https
					.portMapper(portMapper()));
			// @formatter:on
			return http.build();
		}

		@Bean
		PortMapper portMapper() {
			return mock(PortMapper.class);
		}

	}

	@Configuration
	@EnableWebFlux
	@EnableWebFluxSecurity
	static class RedirectToHttpsViaCustomPortsInLambdaConfig {

		@Bean
		SecurityWebFilterChain springSecurity(ServerHttpSecurity http) {
			// @formatter:off
			http
				.redirectToHttps((redirectToHttps) -> redirectToHttps
						.portMapper(portMapper())
				);
			// @formatter:on
			return http.build();
		}

		@Bean
		PortMapper portMapper() {
			return mock(PortMapper.class);
		}

	}

}
