/*
 * 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 org.junit.jupiter.api.Test;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.boot.autoconfigure.AutoConfigurations;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.runner.ApplicationContextRunner;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.cloud.openfeign.FeignAutoConfiguration;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.GetMapping;

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

/**
 * @author 黄学敏（huangxuemin)
 */
public class SentinelFallbackSupportFactoryBeanTests {

	private static final String FACTORY_BEAN_FALLBACK_MESSAGE = "factoryBean fallback message";

	private static final String ORIGINAL_FALLBACK_MESSAGE = "OriginalFeign fallback message";

	private final ApplicationContextRunner runner = new ApplicationContextRunner()
			.withBean(FactoryBeanFallbackFeignFallback.class)
			.withBean(OriginalFeignFallback.class)
			.withConfiguration(AutoConfigurations.of(TestConfiguration.class, FeignAutoConfiguration.class))
			.withPropertyValues("feign.sentinel.enabled=true");

	@Test
	public void shouldRunFallbackFromBeanOrFactoryBean() {
		runner.run(ctx -> {
			assertThat(ctx.getBean(OriginalFeign.class).get()).isEqualTo(ORIGINAL_FALLBACK_MESSAGE);
			assertThat(ctx.getBean(FactoryBeanFallbackFeign.class).get()).isEqualTo(FACTORY_BEAN_FALLBACK_MESSAGE);
		});
	}

	@Configuration(proxyBeanMethods = false)
	@EnableFeignClients(clients = {OriginalFeign.class, FactoryBeanFallbackFeign.class })
	@EnableAutoConfiguration
	public static class TestConfiguration {

	}

	@FeignClient(name = "original", url = "https://original", fallback = OriginalFeignFallback.class)
	interface OriginalFeign {

		@GetMapping("/")
		String get();

	}

	@FeignClient(name = "factoryBean", url = "https://factoryBean", fallback = FactoryBeanFallbackFeignFallback.class)
	interface FactoryBeanFallbackFeign {

		@GetMapping("/")
		String get();

	}

	private static final class FactoryBeanFallbackFeignFallback implements FactoryBean<FactoryBeanFallbackFeign> {

		@Override
		public FactoryBeanFallbackFeign getObject() {
			return () -> FACTORY_BEAN_FALLBACK_MESSAGE;
		}

		@Override
		public Class<?> getObjectType() {
			return FactoryBeanFallbackFeign.class;
		}

	}

	private static final class OriginalFeignFallback implements OriginalFeign {

		@Override
		public String get() {
			return ORIGINAL_FALLBACK_MESSAGE;
		}

	}

}
