/*
 * 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.filter.factory.rewrite;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

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

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.MediaType;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.web.util.UriComponentsBuilder;

import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;

@SpringBootTest(webEnvironment = RANDOM_PORT)
@DirtiesContext
class ModifyResponseBodyGatewayFilterFactoryGzipTests extends BaseWebClientTests {

	@Test
	void testModificationOfResponseBody() {
		URI uri = UriComponentsBuilder.fromUriString(this.baseUri + "/gzip").build(true).toUri();

		testClient.get().uri(uri).header("Host", "www.modifyresponsebodyjava.org").accept(MediaType.APPLICATION_JSON)
				.exchange().expectBody().json("{\"length\":25,\"value\":\"\\\"httpbin compatible home\\\"\"}");
	}

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

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

		@Bean
		RouteLocator testRouteLocator(RouteLocatorBuilder builder) {
			return builder.routes().route("modify_response_java_test_gzip", r -> r.path("/gzip").and()
					.host("www.modifyresponsebodyjava.org")
					.filters(f -> f.modifyResponseBody(String.class, Map.class, (webExchange, originalResponse) -> {
						Map<String, Object> modifiedResponse = new HashMap<>();
						modifiedResponse.put("value", originalResponse);
						modifiedResponse.put("length", originalResponse.length());
						return Mono.just(modifiedResponse);
					})).uri(uri)).build();
		}

	}

}
