/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.security.config.annotation.web.configurers;

import static org.mockito.Matchers.any;
import static org.mockito.Matchers.same;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.spy;
import static org.powermock.api.mockito.PowerMockito.verifyStatic;
import static org.powermock.api.mockito.PowerMockito.when;

import java.lang.reflect.Method;

import javax.servlet.Filter;
import javax.servlet.http.HttpServletRequest;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.mock.web.MockFilterChain;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.security.authentication.TestingAuthenticationToken;
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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.web.context.HttpRequestResponseHolder;
import org.springframework.security.web.context.HttpSessionSecurityContextRepository;
import org.springframework.security.web.csrf.CsrfToken;
import org.springframework.security.web.csrf.HttpSessionCsrfTokenRepository;
import org.springframework.util.ReflectionUtils;


/**
 *
 * @author Rob Winch
 */
@RunWith(PowerMockRunner.class)
@PrepareForTest({ReflectionUtils.class, Method.class})
public class SessionManagementConfigurerServlet31Tests {
    @Mock
    Method method;

    MockHttpServletRequest request;
    MockHttpServletResponse response;
    MockFilterChain chain;

    ConfigurableApplicationContext context;

    Filter springSecurityFilterChain;

    @Before
    public void setup() {
        request = new MockHttpServletRequest();
        response = new MockHttpServletResponse();
        chain = new MockFilterChain();
    }

    @After
    public void teardown() {
        if(context != null) {
            context.close();
        }
    }

    @Test
    public void changeSessionIdDefaultsInServlet31Plus() throws Exception {
        spy(ReflectionUtils.class);
        Method method = mock(Method.class);
        MockHttpServletRequest request = new MockHttpServletRequest();
        request.getSession();
        request.setServletPath("/login");
        request.setMethod("POST");
        request.setParameter("username", "user");
        request.setParameter("password", "password");
        CsrfToken token = new HttpSessionCsrfTokenRepository().generateAndSaveToken(request, response);
        request.setParameter(token.getParameterName(),token.getToken());
        when(ReflectionUtils.findMethod(HttpServletRequest.class, "changeSessionId")).thenReturn(method);

        loadConfig(SessionManagementDefaultSessionFixationServlet31Config.class);

        springSecurityFilterChain.doFilter(request,response,chain);

        verifyStatic();
        ReflectionUtils.invokeMethod(same(method), any(HttpServletRequest.class));
    }

    @EnableWebSecurity
    @Configuration
    static class SessionManagementDefaultSessionFixationServlet31Config extends WebSecurityConfigurerAdapter {
        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
                .formLogin()
                    .and()
                .sessionManagement();
        }

        @Override
        protected void registerAuthentication(AuthenticationManagerBuilder auth)
                throws Exception {
            auth
                .inMemoryAuthentication()
                    .withUser("user").password("password").roles("USER");
        }
    }

    private void loadConfig(Class<?>...classes) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
        context.register(classes);
        context.refresh();
        this.context = context;
        this.springSecurityFilterChain = this.context.getBean("springSecurityFilterChain",Filter.class);
    }

    private void login(Authentication auth) {
        HttpSessionSecurityContextRepository repo = new HttpSessionSecurityContextRepository();
        HttpRequestResponseHolder requestResponseHolder = new HttpRequestResponseHolder(request, response);
        repo.loadContext(requestResponseHolder);

        SecurityContextImpl securityContextImpl = new SecurityContextImpl();
        securityContextImpl.setAuthentication(auth);
        repo.saveContext(securityContextImpl, requestResponseHolder.getRequest(), requestResponseHolder.getResponse());
    }
}
