/*
 * Copyright (c) 2021-2031, 河北计全科技有限公司 (https://www.jeequan.com & jeequan@126.com).
 * <p>
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * 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 com.jeequan.jeepay.mgr.secruity;

import com.jeequan.jeepay.mgr.config.SystemYmlConfig;
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.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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

/*
* Spring Security 配置项
*
* @author terrfly
* @site https://www.jeequan.com
* @date 2021/6/8 17:11
*/
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true) //开启@PreAuthorize @PostAuthorize 等前置后置安全校验注解
public class WebSecurityConfig extends WebSecurityConfigurerAdapter{

    @Autowired private UserDetailsService userDetailsService;
    @Autowired private JeeAuthenticationEntryPoint unauthorizedHandler;
    @Autowired private SystemYmlConfig systemYmlConfig;

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }



    /**
     * 使用BCrypt强哈希函数 实现PasswordEncoder
     * **/
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Autowired
    public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
        authenticationManagerBuilder
                .userDetailsService(this.userDetailsService)
                .passwordEncoder(passwordEncoder());
    }

    /** 允许跨域请求 **/
    @Bean
    public CorsFilter corsFilter() {

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        if(systemYmlConfig.getAllowCors()){
            CorsConfiguration config = new CorsConfiguration();
            config.setAllowCredentials(true);   //带上cookie信息
//          config.addAllowedOrigin(CorsConfiguration.ALL);  //允许跨域的域名， *表示允许任何域名使用
            config.addAllowedOriginPattern(CorsConfiguration.ALL);  //使用addAllowedOriginPattern 避免出现 When allowCredentials is true, allowedOrigins cannot contain the special value "*" since that cannot be set on the "Access-Control-Allow-Origin" response header. To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead.
            config.addAllowedHeader(CorsConfiguration.ALL);   //允许任何请求头
            config.addAllowedMethod(CorsConfiguration.ALL);   //允许任何方法（post、get等）
            source.registerCorsConfiguration("/**", config); // CORS 配置对所有接口都有效
        }
        return new CorsFilter(source);
    }

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
		     	// 由于使用的是JWT，我们这里不需要csrf
		        .csrf().disable()

                .cors().and()

                // 认证失败处理方式
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()

		        // 基于token，所以不需要session
		        .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()

		        .authorizeRequests()

		        // 除上面外的所有请求全部需要鉴权认证
		        .anyRequest().authenticated();

		        // 添加JWT filter
		        httpSecurity.addFilterBefore(new JeeAuthenticationTokenFilter(), UsernamePasswordAuthenticationFilter.class);

        // 禁用缓存
        httpSecurity.headers().cacheControl();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        //ignore文件 ： 无需进入spring security 框架
    	// 1.允许对于网站静态资源的无授权访问
        // 2.对于获取token的rest api要允许匿名访问
        web.ignoring().antMatchers(
                HttpMethod.GET,
                "/",
                "/*.html",
                "/favicon.ico",
                "/**/*.html",
                "/**/*.css",
                "/**/*.js",
                "/**/*.png",
                "/**/*.jpg",
                "/**/*.jpeg",
                "/**/*.svg",
                "/**/*.ico",
                "/**/*.webp",
                "/*.txt",
                "/**/*.xls",
                "/**/*.mp4"   //支持mp4格式的文件匿名访问
        )
        .antMatchers(
        		"/api/anon/**" //匿名访问接口
        );
    }

}
