package isa.qa.config.security;

import com.google.common.collect.ImmutableList;
import lombok.AllArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
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.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import java.util.Objects;


/**
 * Security Config
 *
 * @author May
 * @version 1.0
 * @date 2018/11/21 16:39
 */
@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
@AllArgsConstructor
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    private final GeneratorUserDetailService userDetailService;

    private final AuthenticationEntryPoint authenticationEntryPoint;

    private final Environment environment;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.cors().and()
                .exceptionHandling()
                .authenticationEntryPoint(authenticationEntryPoint)
                .and()
                .authorizeRequests()
                .antMatchers("/", "/static/", "/api/users/actions/register", "/api/users/actions/login",
                        "/api/users/verify_codes/actions/send", "/api/password/actions/reset", "/files/**", "/api/applications/accessKeys")
                .permitAll()
                .antMatchers("/auth/**")
                .permitAll()
                .anyRequest()
                .authenticated()
                .and()
                .formLogin()
                .loginPage("/login")
                .permitAll()
                .defaultSuccessUrl("/hello")
                .permitAll()
                .and()
                .logout()
                .logoutUrl("/logout")
                .logoutSuccessUrl("/home")
                .permitAll()
                .and()
                .csrf().disable();
    }

    @Override
    public void configure(WebSecurity web) {
        web.ignoring().antMatchers("/files/**");
        if (!Objects.equals(environment.getActiveProfiles()[0], "pro")) {
            web.ignoring().antMatchers("/**");
        }
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth
                .userDetailsService(userDetailService)
                .passwordEncoder(passwordEncoder());

    }

    /**
     * 装载BCrypt密码编码器
     */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    @Override
    protected AuthenticationManager authenticationManager() throws Exception {
        return super.authenticationManager();
    }

    /**
     * 为了可以让前端可以进行跨域请求
     */
    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        final CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(ImmutableList.of("*"));
        configuration.setAllowedMethods(ImmutableList.of("HEAD",
                "GET", "POST", "PUT", "DELETE", "PATCH"));
        // setAllowCredentials(true) is important, otherwise:
        // The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'.
        configuration.setAllowCredentials(true);
        // setAllowedHeaders is important! Without it, OPTIONS preflight request
        // will fail with 403 Invalid CORS request
        configuration.setAllowedHeaders(ImmutableList
                .of("Authorization", "Cache-Control", "Content-Type"));
        final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}