/*
 * Copyright 2013-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 com.alibaba.cloud.sentinel;

import com.alibaba.cloud.sentinel.annotation.SentinelRestTemplate;
import com.alibaba.cloud.sentinel.custom.SentinelBeanPostProcessor;
import com.alibaba.cloud.sentinel.rest.SentinelClientHttpResponse;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import org.junit.Test;

import org.springframework.beans.factory.BeanCreationException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.web.client.RestTemplate;

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

/**
 * @author <a href="mailto:fangjian0423@gmail.com">Jim</a>
 */
public class SentinelRestTemplateTests {

	@Test(expected = BeanCreationException.class)
	public void testFbkMethod() {
		new AnnotationConfigApplicationContext(TestConfig1.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testFbkClass() {
		new AnnotationConfigApplicationContext(TestConfig2.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testblkMethod() {
		new AnnotationConfigApplicationContext(TestConfig3.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testblkClass() {
		new AnnotationConfigApplicationContext(TestConfig4.class);
	}

	@Test
	public void testNormal() {
		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
				TestConfig5.class);
		assertThat(context.getBeansOfType(RestTemplate.class).size()).isEqualTo(1);
	}

	@Test(expected = BeanCreationException.class)
	public void testBlkMethodExists() {
		new AnnotationConfigApplicationContext(TestConfig6.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testFbkMethodExists() {
		new AnnotationConfigApplicationContext(TestConfig7.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testBlkReturnValue() {
		new AnnotationConfigApplicationContext(TestConfig8.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testFbkReturnValue() {
		new AnnotationConfigApplicationContext(TestConfig9.class);
	}

	@Test
	public void testNormalWithoutParam() {
		new AnnotationConfigApplicationContext(TestConfig10.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testUrlClnMethod() {
		new AnnotationConfigApplicationContext(TestConfig11.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testUrlClnClass() {
		new AnnotationConfigApplicationContext(TestConfig12.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testUrlClnMethodExists() {
		new AnnotationConfigApplicationContext(TestConfig13.class);
	}

	@Test(expected = BeanCreationException.class)
	public void testUrlClnReturnValue() {
		new AnnotationConfigApplicationContext(TestConfig14.class);
	}

	@Configuration
	public static class TestConfig1 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(fallback = "fbk")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig2 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(fallbackClass = ExceptionUtil.class)
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig3 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(blockHandler = "blk")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig4 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(blockHandlerClass = ExceptionUtil.class)
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig5 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				blockHandlerClass = SentinelRestTemplateTests.ExceptionUtil.class,
				blockHandler = "handleException",
				fallbackClass = SentinelRestTemplateTests.ExceptionUtil.class,
				fallback = "fallbackException",
				urlCleanerClass = SentinelRestTemplateTests.UrlCleanUtil.class,
				urlCleaner = "clean")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig6 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				blockHandlerClass = SentinelRestTemplateTests.ExceptionUtil.class,
				blockHandler = "handleException1")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig7 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				fallbackClass = SentinelRestTemplateTests.ExceptionUtil.class,
				fallback = "fallbackException1")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig8 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				blockHandlerClass = SentinelRestTemplateTests.ExceptionUtil.class,
				blockHandler = "handleException2")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig9 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				fallbackClass = SentinelRestTemplateTests.ExceptionUtil.class,
				fallback = "fallbackException2")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig10 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

		@Bean
		@SentinelRestTemplate
		RestTemplate restTemplate2() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig11 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(urlCleaner = "cln")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig12 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(urlCleanerClass = UrlCleanUtil.class)
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig13 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				urlCleanerClass = SentinelRestTemplateTests.UrlCleanUtil.class,
				urlCleaner = "clean1")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	@Configuration
	public static class TestConfig14 {

		@Bean
		SentinelBeanPostProcessor sentinelBeanPostProcessor(
				ApplicationContext applicationContext) {
			return new SentinelBeanPostProcessor(applicationContext);
		}

		@Bean
		@SentinelRestTemplate(
				urlCleanerClass = SentinelRestTemplateTests.UrlCleanUtil.class,
				urlCleaner = "clean2")
		RestTemplate restTemplate() {
			return new RestTemplate();
		}

	}

	public static class ExceptionUtil {

		public static SentinelClientHttpResponse handleException(HttpRequest request,
				byte[] body, ClientHttpRequestExecution execution, BlockException ex) {
			System.out.println("Oops: " + ex.getClass().getCanonicalName());
			return new SentinelClientHttpResponse("Oops");
		}

		public static void handleException2(HttpRequest request, byte[] body,
				ClientHttpRequestExecution execution, BlockException ex) {
			System.out.println("Oops: " + ex.getClass().getCanonicalName());
		}

		public static SentinelClientHttpResponse fallbackException(HttpRequest request,
				byte[] body, ClientHttpRequestExecution execution, BlockException ex) {
			System.out.println("Oops: " + ex.getClass().getCanonicalName());
			return new SentinelClientHttpResponse("Oops fallback");
		}

		public static void fallbackException2(HttpRequest request, byte[] body,
				ClientHttpRequestExecution execution, BlockException ex) {
			System.out.println("Oops: " + ex.getClass().getCanonicalName());
		}

	}

	public static class UrlCleanUtil {

		public static String clean(String url) {
			return url;
		}

		public static void clean2(String url) {
		}

	}

}
