/*
 * 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 java.security.interfaces.RSAPublicKey;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.jwt.JwtDecoder;
import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
import org.springframework.security.web.SecurityFilterChain;

/**
 * OAuth2 Resource Server Configuration.
 *
 * @author Josh Cummings
 */
@Configuration
public class OAuth2ResourceServerSecurityConfiguration {

	@Value("${spring.security.oauth2.resourceserver.jwt.key-value}")
	RSAPublicKey key;

	@Bean
	public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
		// @formatter:off
		http
				.authorizeHttpRequests((authorize) -> authorize
						.requestMatchers("/message/**").hasAuthority("SCOPE_message:read")
						.anyRequest().authenticated()
				)
				.oauth2ResourceServer((oauth2) -> oauth2
						.jwt((jwt) -> jwt.decoder(jwtDecoder()))
				);
		// @formatter:on
		return http.build();
	}

	@Bean
	JwtDecoder jwtDecoder() {
		return NimbusJwtDecoder.withPublicKey(this.key).build();
	}

}
