/*
 * Copyright 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 example;

import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

import static org.springframework.security.config.Customizer.withDefaults;

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

	// @formatter:off
	@Bean
	public UserDetailsService userDetailsService() {
		UserDetails user = User.withDefaultPasswordEncoder()
				.username("user")
				.password("password")
				.roles("USER")
				.build();
		return new InMemoryUserDetailsManager(user);
	}
	// @formatter:on

	// @formatter:off
	@Override
	protected void configure(HttpSecurity http) throws Exception {
		http
			.authorizeRequests((requests) -> requests
				.anyRequest().authenticated()
			)
			.formLogin(withDefaults())
			.sessionManagement((sessions) -> sessions
				.sessionConcurrency((concurrency) -> concurrency
					.maximumSessions(1)
					.expiredUrl("/login?expired")
				)
			);
	}
	// @formatter:on

}
