package br.ufc.mandacaru5.config.security;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configurers.ResourceServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.token.TokenEnhancerChain;
import org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter;

@Configuration
public class OAuthConfiguration {

    @Value("${security.oauth2.client.scope}")
    private String scope;
    @Value("${security.oauth2.client.client-id}")
    private String client;
    @Value("${security.oauth2.client.client-secret}")
    private String secret;
    @Value("${security.oauth2.client.grant-type}")
    private String grantType;

    private static final String RESOURCE_ID = "mandacaru";

    @Configuration
    @EnableResourceServer
    protected class ResourceServerConfiguration extends ResourceServerConfigurerAdapter {

        @Override
        public void configure(ResourceServerSecurityConfigurer resources) {
            resources.resourceId(RESOURCE_ID);
        }
    }

    @Configuration
    @EnableAuthorizationServer
    protected class AuthorizationServerConfiguration extends AuthorizationServerConfigurerAdapter {

        @Autowired
        @Qualifier("authenticationManagerBean")
        private AuthenticationManager authenticationManager;

        @Autowired
        private UserDetailsServiceImpl userDetailsService;

        @Autowired
        private PasswordEncoder passwordEncoder;

        @Override
        public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
            TokenEnhancerChain tokenEnhancerChain = new TokenEnhancerChain();
            tokenEnhancerChain.setTokenEnhancers(List.of(new CustomTokenEnhancer(), accessTokenConverter()));
            endpoints.
                accessTokenConverter(accessTokenConverter()).
                tokenEnhancer(tokenEnhancerChain).
                authenticationManager(this.authenticationManager)
                .userDetailsService(userDetailsService);
        }

        @Override
        public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
            clients.inMemory().withClient(client).authorizedGrantTypes(grantType).scopes(scope).resourceIds(RESOURCE_ID)
                    .secret(passwordEncoder.encode(secret)).accessTokenValiditySeconds(50000);
        }

        @Bean
        public JwtAccessTokenConverter accessTokenConverter() {
            JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
            converter.setSigningKey(secret);
            return converter;
        }

    }
}