package br.ufpr.tcc.gregs.configurations.security;

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.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.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

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

	@Autowired
	private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;

	@Autowired
	private UserDetailsService jwtUserDetailsService;

	@Autowired
	private JwtRequestFilter jwtRequestFilter;

	@Autowired
	public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
		// configure AuthenticationManager so that it knows from where to load
		// user for matching credentials
		// Use BCryptPasswordEncoder
		auth.userDetailsService(jwtUserDetailsService).passwordEncoder(passwordEncoder());
	}

	@Bean
	CorsConfigurationSource corsConfigurationSource() {
		CorsConfiguration configuration = new CorsConfiguration();
		configuration.setAllowCredentials(true);
		configuration.addAllowedOrigin("http://localhost:4200");
		configuration.addAllowedHeader("*");
		configuration.addAllowedMethod("*");
		UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
		source.registerCorsConfiguration("/**", configuration);
		return source;
	}
	

	@Bean
	public PasswordEncoder passwordEncoder() {
		return new BCryptPasswordEncoder();
	}

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

	@Override
	protected void configure(HttpSecurity httpSecurity) throws Exception {
		// We don't need CSRF for this example
		// config de cors aqui
		httpSecurity.cors().and().csrf().disable()
				// dont authenticate this particular request
				// adicionar aqui recursos aceitos sem autenticacao, se for remover, deixar uma
				// "/" ao lado do método (se não buga)
				.authorizeRequests().antMatchers(HttpMethod.GET, "/health", "/componente/*", "/pagina/*", "/tags/*", "/tags", "/usuarios", "/usuarios/*").permitAll()
				.and().authorizeRequests().antMatchers(HttpMethod.POST, "/login", "/usuarios").permitAll().and()
				.authorizeRequests().antMatchers(HttpMethod.PUT, "//").permitAll().and().authorizeRequests()
				.antMatchers(HttpMethod.DELETE, "//").permitAll().and().authorizeRequests().antMatchers("//")
				.permitAll()

				// all other requests need to be authenticated
				.anyRequest().authenticated().and().
				// make sure we use stateless session; session won't be used to
				// store user's state.
				exceptionHandling().authenticationEntryPoint(jwtAuthenticationEntryPoint).and().sessionManagement()
				.sessionCreationPolicy(SessionCreationPolicy.STATELESS);

		// Add a filter to validate the tokens with every request
		httpSecurity.addFilterBefore(jwtRequestFilter, UsernamePasswordAuthenticationFilter.class);
	}
}