package com.spring.config;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationEventPublisher;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.DefaultAuthenticationEventPublisher;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.factory.PasswordEncoderFactories;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

@Configuration
public class DefaultSecurityConfig {

    /**
     * 添加内存用户
     *
     * @return {@link ConditionalOnMissingBean}
     */
    @Bean
    @ConditionalOnMissingBean(UserDetailsService.class)
    InMemoryUserDetailsManager inMemoryUserDetailsManager() {
        String generatedPassword = PasswordEncoderFactories.createDelegatingPasswordEncoder()
                .encode("123456");
        return new InMemoryUserDetailsManager(User.withUsername("user")
                .password(generatedPassword).roles("USER").build());
    }

    @Bean
    @ConditionalOnMissingBean(AuthenticationEventPublisher.class)
    DefaultAuthenticationEventPublisher defaultAuthenticationEventPublisher(ApplicationEventPublisher delegate) {
        return new DefaultAuthenticationEventPublisher(delegate);
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public AuthenticationManager authenticationManager(UserDetailsService userDetailsService, PasswordEncoder passwordEncoder) {
        DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider(userDetailsService);
        authenticationProvider.setPasswordEncoder(passwordEncoder);

        return new ProviderManager(authenticationProvider);
    }

}