package cn.seecoder.fdroidrepository.config;

import cn.seecoder.fdroidrepository.Service.ServiceImpl.UserServiceImpl;
import cn.seecoder.fdroidrepository.security.JwtAuthenticationEntryPoint;
import cn.seecoder.fdroidrepository.security.JwtAuthenticationTokenFilter;
import cn.seecoder.fdroidrepository.utils.JwtUtil;
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.BeanIds;
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.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration(proxyBeanMethods = false)
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    /**
     * The constant AUTHORIZATION_HEADER.
     */
    public static final String AUTHORIZATION_HEADER = "Authorization";

    /**
     * The constant AUTHORIZATION_TOKEN.
     */
    public static final String AUTHORIZATION_TOKEN = "access_token";

    /**
     * The constant SECURITY_IGNORE_URLS_SPILT_CHAR.
     */
    public static final String SECURITY_IGNORE_URLS_SPILT_CHAR = ",";

    /**
     * The constant TOKEN_PREFIX.
     */
    public static final String TOKEN_PREFIX = "Bearer ";

    @Autowired
    private UserServiceImpl userDetailsService;

    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;

    @Autowired
    private JwtUtil tokenProvider;



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

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

    @Override
    public void configure(WebSecurity web) {
        String ignoreURLs = "/public/**,/open-api/**,/static/**,/css/**,/js/**,/images/**,/api/**";
        for (String ignoreURL : ignoreURLs.trim().split(SECURITY_IGNORE_URLS_SPILT_CHAR)) {
            web.ignoring().antMatchers(ignoreURL.trim());
        }
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests().anyRequest().authenticated().and()
            // custom token authorize exception handler
            .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
            // since we use jwt, session is not necessary
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
            // since we use jwt, csrf is not necessary
            .csrf().disable();
        http.addFilterBefore(new JwtAuthenticationTokenFilter(tokenProvider),
            UsernamePasswordAuthenticationFilter.class);

        // disable cache
        http.headers().cacheControl();
    }

    /**
     * Password encoder password encoder.
     *
     * @return the password encoder
     */
    @Bean
    public static PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

}