/*
 * Copyright (C) 2008-2017, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.server.configuration;

import com.juick.service.UserService;
import com.juick.service.security.JuickUserDetailsService;
import com.juick.service.security.deprecated.RequestParamHashRememberMeServices;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
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.authentication.HttpStatusEntryPoint;
import org.springframework.security.web.authentication.RememberMeServices;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import javax.inject.Inject;
import java.util.Arrays;
import java.util.Collections;
import java.util.concurrent.TimeUnit;

/**
 * Created by aalexeev on 11/21/16.
 */
@Configuration
@EnableWebSecurity
public class ApiSecurityConfig extends WebSecurityConfigurerAdapter {
    @Value("${auth_remember_me_key:secret}")
    private String rememberMeKey;
    @Inject
    private UserService userService;

    ApiSecurityConfig() {
        super(true);
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers(HttpMethod.OPTIONS).permitAll()
                .antMatchers("/", "/messages", "/users", "/thread", "/tags", "/tlgmbtwbhk", "/fbwbhk",
                        "/skypebotendpoint", "/_fblogin", "/_vklogin", "_tglogin").permitAll()
                .anyRequest().hasRole("USER")
                .and().httpBasic().authenticationEntryPoint(juickAuthenticationEntryPoint())
                .and().anonymous()
                .and().cors().configurationSource(corsConfigurationSource())
                .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and().exceptionHandling().authenticationEntryPoint(juickAuthenticationEntryPoint())
                .and()
                .rememberMe()
                .alwaysRemember(true)
                .tokenValiditySeconds((int) TimeUnit.DAYS.toSeconds(6 * 30))
                .rememberMeServices(rememberMeServices())
                .key(rememberMeKey)
                .and().authenticationProvider(authenticationProvider())
                .headers().defaultsDisabled().cacheControl();
    }

    @Bean
    public DaoAuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider();

        authenticationProvider.setUserDetailsService(userDetailsService());

        return authenticationProvider;
    }

    @Bean
    public JuickUserDetailsService userDetailsService() {
        return new JuickUserDetailsService(userService);
    }

    @Bean
    public RememberMeServices rememberMeServices() {
        return new RequestParamHashRememberMeServices(rememberMeKey, userService);
    }

    @Bean
    public AuthenticationEntryPoint juickAuthenticationEntryPoint() {
        return new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED);
    }

    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();

        configuration.setAllowedOrigins(Collections.singletonList("*"));
        configuration.setAllowedMethods(Arrays.asList("POST", "GET", "PUT", "OPTIONS", "DELETE"));
        configuration.setAllowedHeaders(Collections.singletonList("*"));

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);

        return source;
    }
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources/**",
                "/configuration/**", "/swagger-ui.html", "/webjars/**", "/ws/**", "/rss/**", "/h2-console/**");
    }
}