/*
 * Copyright 2013-2020 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.cloud.gateway.handler.predicate;

import java.time.Duration;

import org.junit.jupiter.api.Test;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.cloud.gateway.test.BaseWebClientTests;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Import;
import org.springframework.http.HttpStatus;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.web.reactive.function.client.ClientResponse;

import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
import static org.springframework.cloud.gateway.test.TestUtils.assertStatus;

@SpringBootTest(webEnvironment = RANDOM_PORT)
@DirtiesContext
@ActiveProfiles({ "remote-address" })
public class XForwardedRemoteAddrRoutePredicateFactoryTests extends BaseWebClientTests {

	@Test
	public void xForwardedRemoteAddrWorks() {
		Mono<ClientResponse> result = webClient.get().uri("/xforwardfor").header("X-Forwarded-For", "12.34.56.78")
				.exchangeToMono(Mono::just);

		StepVerifier.create(result).consumeNextWith(response -> assertStatus(response, HttpStatus.OK)).expectComplete()
				.verify(Duration.ofSeconds(20));
	}

	@Test
	public void xForwardedRemoteAddrWorksUsingRightMostValueByDefault() {
		Mono<ClientResponse> result = webClient.get().uri("/xforwardfor")
				.header("X-Forwarded-For", "99.99.99.99,12.34.56.78").exchangeToMono(Mono::just);

		StepVerifier.create(result).consumeNextWith(response -> assertStatus(response, HttpStatus.OK)).expectComplete()
				.verify(Duration.ofSeconds(20));
	}

	@Test
	public void xForwardedRemoteAddrRejects() {
		Mono<ClientResponse> result = webClient.get().uri("/xforwardfor").header("X-Forwarded-For", "99.99.99.99")
				.exchangeToMono(Mono::just);

		StepVerifier.create(result).consumeNextWith(response -> assertStatus(response, HttpStatus.NOT_FOUND))
				.expectComplete().verify(Duration.ofSeconds(20));
	}

	@EnableAutoConfiguration
	@SpringBootConfiguration
	@Import(DefaultTestConfig.class)
	public static class TestConfig {

		@Value("${test.uri}")
		String uri;

		@Bean
		public RouteLocator testRouteLocator(RouteLocatorBuilder builder) {
			return builder.routes().route("x_forwarded_for_test", r -> r.path("/xforwardfor").and()
					.xForwardedRemoteAddr("12.34.56.78").filters(f -> f.setStatus(200)).uri(uri)).build();
		}

	}

}
