package com.javadevjournal.security;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.web.AuthenticationEntryPoint;

import org.springframework.http.HttpStatus;
import org.springframework.security.web.authentication.AnonymousAuthenticationFilter;
import org.springframework.security.web.authentication.HttpStatusEntryPoint;
import org.springframework.security.web.util.matcher.*;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled=true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {


    private static final RequestMatcher PROTECTED_URLS = new OrRequestMatcher(
            new AntPathRequestMatcher("/api/**")
    );

    AuthenticationProvider provider;

    public SecurityConfiguration(final AuthenticationProvider authenticationProvider) {
        super();
        this.provider=authenticationProvider;
    }

    @Override
    protected void configure(final AuthenticationManagerBuilder auth) {
        auth.authenticationProvider(provider);
    }

    @Override
    public void configure(final WebSecurity webSecurity) {
        webSecurity.ignoring().antMatchers("/token/**");
    }

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http.sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .exceptionHandling()
                .and()
                .authenticationProvider(provider)
                .addFilterBefore(authenticationFilter(), AnonymousAuthenticationFilter.class)
                .authorizeRequests()
                .requestMatchers(PROTECTED_URLS)
                .authenticated()
                .and()
                .csrf().disable()
                .formLogin().disable()
                .httpBasic().disable()
                .logout().disable();
    }

    @Bean
      AuthenticationFilter authenticationFilter() throws Exception {
        final AuthenticationFilter filter = new AuthenticationFilter(PROTECTED_URLS);
        filter.setAuthenticationManager(authenticationManager());
        //filter.setAuthenticationSuccessHandler(successHandler());
        return filter;
    }

    @Bean
    AuthenticationEntryPoint forbiddenEntryPoint() {
        return new HttpStatusEntryPoint(HttpStatus.FORBIDDEN);
    }
}