package com.plannaplan.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.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.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.security.web.util.matcher.OrRequestMatcher;
import org.springframework.security.web.util.matcher.RequestMatcher;
import org.springframework.http.HttpStatus;
import org.springframework.security.web.authentication.AnonymousAuthenticationFilter;
import org.springframework.security.web.authentication.HttpStatusEntryPoint;

/**
 * Spring config class for security
 */
@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

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

    AuthenticationProvider provider;

    public WebSecurityConfig(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**").antMatchers("/token/refresh**")
                .antMatchers("/api/v1/courses/all").antMatchers("/api/v1/groups/course/{id}")
                .antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources/**", "/configuration/security",
                        "/swagger-ui.html", "/webjars/**");
    }

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

    }

    AuthenticationFilter authenticationFilter() throws Exception {
        final AuthenticationFilter filter = new AuthenticationFilter(PROTECTED_URLS);
        filter.setAuthenticationManager(authenticationManager());
        return filter;
    }

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

}