package com.macro.mall.config;

import com.macro.mall.bo.AdminUserDetails;
import com.macro.mall.component.JwtAuthenticationTokenFilter;
import com.macro.mall.component.RestfulAccessDeniedHandler;
import com.macro.mall.model.UmsAdmin;
import com.macro.mall.service.UmsAdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.encoding.Md5PasswordEncoder;
import org.springframework.security.authentication.encoding.PasswordEncoder;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
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.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;


/**
 * SpringSecurity的配置
 */
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private UmsAdminService adminService;

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.csrf()// 由于使用的是JWT，我们这里不需要csrf
                .disable()
                .sessionManagement()// 基于token，所以不需要session
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                .antMatchers(HttpMethod.GET, // 允许对于网站静态资源的无授权访问
                        "/",
                        "/*.html",
                        "/favicon.ico",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js",
                        "/swagger-resources/**",
                        "/v2/api-docs/**"
                )
                .permitAll()
                .antMatchers("/admin/**")// 对于获取token的rest api要允许匿名访问
                .permitAll()
                .antMatchers("/**")//测试时全部运行访问
                .permitAll()
                .anyRequest()// 除上面外的所有请求全部需要鉴权认证
                .authenticated();
        // 禁用缓存
        httpSecurity.headers().cacheControl();
        // 添加JWT filter
        httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter(), UsernamePasswordAuthenticationFilter.class);
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService())
                .passwordEncoder(passwordEncoder());
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new Md5PasswordEncoder();
    }

    @Bean
    public UserDetailsService userDetailsService() {
        //获取登录用户信息
        return new UserDetailsService() {
            @Override
            public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
                UmsAdmin admin = adminService.getAdminByUsername(username);
                if (admin != null) {
                    return new AdminUserDetails(admin);
                }
                throw new UsernameNotFoundException("用户名或密码错误");
            }
        };
    }

    @Bean
    public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(){
        return new JwtAuthenticationTokenFilter();
    }

}
