/*
 * Copyright 2012-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.boot.restclient.test;

import java.util.function.Supplier;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import org.springframework.boot.restclient.RestTemplateBuilder;
import org.springframework.http.client.BufferingClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.test.web.client.RequestExpectationManager;
import org.springframework.test.web.client.SimpleRequestExpectationManager;
import org.springframework.test.web.client.UnorderedRequestExpectationManager;
import org.springframework.web.client.RestTemplate;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
import static org.springframework.test.web.client.match.MockRestRequestMatchers.requestTo;
import static org.springframework.test.web.client.response.MockRestResponseCreators.withSuccess;

/**
 * Tests for {@link MockServerRestTemplateCustomizer}.
 *
 * @author Phillip Webb
 * @author Moritz Halbritter
 */
class MockServerRestTemplateCustomizerTests {

	private MockServerRestTemplateCustomizer customizer;

	@BeforeEach
	void setup() {
		this.customizer = new MockServerRestTemplateCustomizer();
	}

	@Test
	void createShouldUseSimpleRequestExpectationManager() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer();
		customizer.customize(new RestTemplate());
		assertThat(customizer.getServer()).extracting("expectationManager")
			.isInstanceOf(SimpleRequestExpectationManager.class);
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void createWhenExpectationManagerClassIsNullShouldThrowException() {
		Class<? extends RequestExpectationManager> expectationManager = null;
		assertThatIllegalArgumentException().isThrownBy(() -> new MockServerRestTemplateCustomizer(expectationManager))
			.withMessageContaining("'expectationManager' must not be null");
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void createWhenExpectationManagerSupplierIsNullShouldThrowException() {
		Supplier<? extends RequestExpectationManager> expectationManagerSupplier = null;
		assertThatIllegalArgumentException()
			.isThrownBy(() -> new MockServerRestTemplateCustomizer(expectationManagerSupplier))
			.withMessageContaining("'expectationManagerSupplier' must not be null");
	}

	@Test
	void createShouldUseExpectationManagerClass() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer(
				UnorderedRequestExpectationManager.class);
		customizer.customize(new RestTemplate());
		assertThat(customizer.getServer()).extracting("expectationManager")
			.isInstanceOf(UnorderedRequestExpectationManager.class);
	}

	@Test
	void createShouldUseSupplier() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer(
				UnorderedRequestExpectationManager::new);
		customizer.customize(new RestTemplate());
		assertThat(customizer.getServer()).extracting("expectationManager")
			.isInstanceOf(UnorderedRequestExpectationManager.class);
	}

	@Test
	void detectRootUriShouldDefaultToTrue() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer(
				UnorderedRequestExpectationManager.class);
		customizer.customize(new RestTemplateBuilder().baseUri("https://example.com").build());
		assertThat(customizer.getServer()).extracting("expectationManager")
			.isInstanceOf(RootUriRequestExpectationManager.class);
	}

	@Test
	void setDetectRootUriShouldDisableRootUriDetection() {
		this.customizer.setDetectRootUri(false);
		this.customizer.customize(new RestTemplateBuilder().baseUri("https://example.com").build());
		assertThat(this.customizer.getServer()).extracting("expectationManager")
			.isInstanceOf(SimpleRequestExpectationManager.class);
	}

	@Test
	void bufferContentShouldDefaultToFalse() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer();
		RestTemplate restTemplate = new RestTemplate();
		customizer.customize(restTemplate);
		assertThat(restTemplate.getRequestFactory()).isInstanceOf(ClientHttpRequestFactory.class);
	}

	@Test
	void setBufferContentShouldEnableContentBuffering() {
		MockServerRestTemplateCustomizer customizer = new MockServerRestTemplateCustomizer();
		RestTemplate restTemplate = new RestTemplate();
		customizer.setBufferContent(true);
		customizer.customize(restTemplate);
		assertThat(restTemplate.getRequestFactory()).isInstanceOf(BufferingClientHttpRequestFactory.class);
	}

	@Test
	void customizeShouldBindServer() {
		RestTemplate template = new RestTemplateBuilder(this.customizer).build();
		this.customizer.getServer().expect(requestTo("/test")).andRespond(withSuccess());
		template.getForEntity("/test", String.class);
		this.customizer.getServer().verify();
	}

	@Test
	void getServerWhenNoServersAreBoundShouldThrowException() {
		assertThatIllegalStateException().isThrownBy(this.customizer::getServer)
			.withMessageContaining("Unable to return a single MockRestServiceServer since "
					+ "MockServerRestTemplateCustomizer has not been bound to a RestTemplate");
	}

	@Test
	void getServerWhenMultipleServersAreBoundShouldThrowException() {
		this.customizer.customize(new RestTemplate());
		this.customizer.customize(new RestTemplate());
		assertThatIllegalStateException().isThrownBy(this.customizer::getServer)
			.withMessageContaining("Unable to return a single MockRestServiceServer since "
					+ "MockServerRestTemplateCustomizer has been bound to more than one RestTemplate");
	}

	@Test
	void getServerWhenSingleServerIsBoundShouldReturnServer() {
		RestTemplate template = new RestTemplate();
		this.customizer.customize(template);
		assertThat(this.customizer.getServer()).isEqualTo(this.customizer.getServer(template));
	}

	@Test
	void getServerWhenRestTemplateIsFoundShouldReturnServer() {
		RestTemplate template1 = new RestTemplate();
		RestTemplate template2 = new RestTemplate();
		this.customizer.customize(template1);
		this.customizer.customize(template2);
		assertThat(this.customizer.getServer(template1)).isNotNull();
		assertThat(this.customizer.getServer(template2)).isNotNull().isNotSameAs(this.customizer.getServer(template1));
	}

	@Test
	void getServerWhenRestTemplateIsNotFoundShouldReturnNull() {
		RestTemplate template1 = new RestTemplate();
		RestTemplate template2 = new RestTemplate();
		this.customizer.customize(template1);
		assertThat(this.customizer.getServer(template1)).isNotNull();
		assertThat(this.customizer.getServer(template2)).isNull();
	}

	@Test
	void getServersShouldReturnServers() {
		RestTemplate template1 = new RestTemplate();
		RestTemplate template2 = new RestTemplate();
		this.customizer.customize(template1);
		this.customizer.customize(template2);
		assertThat(this.customizer.getServers()).containsOnlyKeys(template1, template2);
	}

	@Test
	void getExpectationManagersShouldReturnExpectationManagers() {
		RestTemplate template1 = new RestTemplate();
		RestTemplate template2 = new RestTemplate();
		this.customizer.customize(template1);
		this.customizer.customize(template2);
		RequestExpectationManager manager1 = this.customizer.getExpectationManagers().get(template1);
		RequestExpectationManager manager2 = this.customizer.getExpectationManagers().get(template2);
		assertThat(this.customizer.getServer(template1)).extracting("expectationManager").isEqualTo(manager1);
		assertThat(this.customizer.getServer(template2)).extracting("expectationManager").isEqualTo(manager2);
	}

}
