/*
 * Copyright 2014-2019 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.session.config.annotation.web.server;

import java.util.HashMap;

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

import org.springframework.beans.factory.UnsatisfiedDependencyException;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.session.ReactiveMapSessionRepository;
import org.springframework.session.ReactiveSessionRepository;
import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
import org.springframework.web.server.session.CookieWebSessionIdResolver;
import org.springframework.web.server.session.DefaultWebSessionManager;
import org.springframework.web.server.session.HeaderWebSessionIdResolver;
import org.springframework.web.server.session.WebSessionIdResolver;
import org.springframework.web.server.session.WebSessionManager;

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

/**
 * Verify various configurations through {@link EnableSpringWebSession}.
 *
 * @author Greg Turnquist
 */
class SpringWebSessionConfigurationTests {

	private AnnotationConfigApplicationContext context;

	@AfterEach
	void cleanup() {
		if (this.context != null) {
			this.context.close();
		}
	}

	@Test
	void enableSpringWebSessionConfiguresThings() {

		this.context = new AnnotationConfigApplicationContext();
		this.context.register(GoodConfig.class);
		this.context.refresh();

		WebSessionManager webSessionManagerFoundByType = this.context.getBean(WebSessionManager.class);
		Object webSessionManagerFoundByName = this.context.getBean(WebHttpHandlerBuilder.WEB_SESSION_MANAGER_BEAN_NAME);

		assertThat(webSessionManagerFoundByType).isNotNull();
		assertThat(webSessionManagerFoundByName).isNotNull();
		assertThat(webSessionManagerFoundByType).isEqualTo(webSessionManagerFoundByName);

		assertThat(this.context.getBean(ReactiveSessionRepository.class)).isNotNull();
	}

	@Test
	void missingReactiveSessionRepositoryBreaksAppContext() {

		this.context = new AnnotationConfigApplicationContext();
		this.context.register(BadConfig.class);

		assertThatExceptionOfType(UnsatisfiedDependencyException.class).isThrownBy(this.context::refresh)
				.withMessageContaining("Error creating bean with name 'webSessionManager'").withMessageContaining(
						"No qualifying bean of type '" + ReactiveSessionRepository.class.getCanonicalName());
	}

	@Test
	void defaultSessionIdResolverShouldBeCookieBased() {

		this.context = new AnnotationConfigApplicationContext();
		this.context.register(GoodConfig.class);
		this.context.refresh();

		DefaultWebSessionManager manager = this.context.getBean(DefaultWebSessionManager.class);
		assertThat(manager.getSessionIdResolver().getClass()).isAssignableFrom(CookieWebSessionIdResolver.class);
	}

	@Test
	void providedSessionIdResolverShouldBePickedUpAutomatically() {

		this.context = new AnnotationConfigApplicationContext();
		this.context.register(OverrideSessionIdResolver.class);
		this.context.refresh();

		DefaultWebSessionManager manager = this.context.getBean(DefaultWebSessionManager.class);
		assertThat(manager.getSessionIdResolver().getClass()).isAssignableFrom(HeaderWebSessionIdResolver.class);
	}

	/**
	 * A configuration with all the right parts.
	 */
	@EnableSpringWebSession
	static class GoodConfig {

		/**
		 * Use Reactor-friendly, {@link java.util.Map}-backed
		 * {@link ReactiveSessionRepository} for test purposes.
		 */
		@Bean
		ReactiveSessionRepository<?> reactiveSessionRepository() {
			return new ReactiveMapSessionRepository(new HashMap<>());
		}

	}

	/**
	 * A configuration where no {@link ReactiveSessionRepository} is defined. It's BAD!
	 */
	@EnableSpringWebSession
	static class BadConfig {

	}

	@EnableSpringWebSession
	static class OverrideSessionIdResolver {

		@Bean
		ReactiveSessionRepository<?> reactiveSessionRepository() {
			return new ReactiveMapSessionRepository(new HashMap<>());
		}

		@Bean
		WebSessionIdResolver alternateWebSessionIdResolver() {
			return new HeaderWebSessionIdResolver();
		}

	}

}
