/*
 * Copyright 2002-2016 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
 *
 *      https://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.web.access.expression;

import java.util.ArrayList;

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import org.aopalliance.intercept.MethodInvocation;
import org.junit.jupiter.api.Test;

import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.security.access.AccessDecisionVoter;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.access.expression.SecurityExpressionHandler;
import org.springframework.security.authentication.TestingAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.FilterInvocation;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;

/**
 * @author Luke Taylor
 */
@SuppressWarnings({ "unchecked" })
public class WebExpressionVoterTests {

	private Authentication user = new TestingAuthenticationToken("user", "pass", "X");

	@Test
	public void supportsWebConfigAttributeAndFilterInvocation() {
		WebExpressionVoter voter = new WebExpressionVoter();
		assertThat(voter.supports(
				new WebExpressionConfigAttribute(mock(Expression.class), mock(EvaluationContextPostProcessor.class))))
						.isTrue();
		assertThat(voter.supports(FilterInvocation.class)).isTrue();
		assertThat(voter.supports(MethodInvocation.class)).isFalse();
	}

	@Test
	public void abstainsIfNoAttributeFound() {
		WebExpressionVoter voter = new WebExpressionVoter();
		assertThat(
				voter.vote(this.user, new FilterInvocation("/path", "GET"), SecurityConfig.createList("A", "B", "C")))
						.isEqualTo(AccessDecisionVoter.ACCESS_ABSTAIN);
	}

	@Test
	public void grantsAccessIfExpressionIsTrueDeniesIfFalse() {
		WebExpressionVoter voter = new WebExpressionVoter();
		Expression ex = mock(Expression.class);
		EvaluationContextPostProcessor postProcessor = mock(EvaluationContextPostProcessor.class);
		given(postProcessor.postProcess(any(EvaluationContext.class), any(FilterInvocation.class)))
				.willAnswer((invocation) -> invocation.getArgument(0));
		WebExpressionConfigAttribute weca = new WebExpressionConfigAttribute(ex, postProcessor);
		EvaluationContext ctx = mock(EvaluationContext.class);
		SecurityExpressionHandler eh = mock(SecurityExpressionHandler.class);
		FilterInvocation fi = new FilterInvocation("/path", "GET");
		voter.setExpressionHandler(eh);
		given(eh.createEvaluationContext(this.user, fi)).willReturn(ctx);
		given(ex.getValue(ctx, Boolean.class)).willReturn(Boolean.TRUE, Boolean.FALSE);
		ArrayList attributes = new ArrayList();
		attributes.addAll(SecurityConfig.createList("A", "B", "C"));
		attributes.add(weca);
		assertThat(voter.vote(this.user, fi, attributes)).isEqualTo(AccessDecisionVoter.ACCESS_GRANTED);
		// Second time false
		assertThat(voter.vote(this.user, fi, attributes)).isEqualTo(AccessDecisionVoter.ACCESS_DENIED);
	}

	// SEC-2507
	@Test
	public void supportFilterInvocationSubClass() {
		WebExpressionVoter voter = new WebExpressionVoter();
		assertThat(voter.supports(FilterInvocationChild.class)).isTrue();
	}

	@Test
	public void supportFilterInvocation() {
		WebExpressionVoter voter = new WebExpressionVoter();
		assertThat(voter.supports(FilterInvocation.class)).isTrue();
	}

	@Test
	public void supportsObjectIsFalse() {
		WebExpressionVoter voter = new WebExpressionVoter();
		assertThat(voter.supports(Object.class)).isFalse();
	}

	private static class FilterInvocationChild extends FilterInvocation {

		FilterInvocationChild(ServletRequest request, ServletResponse response, FilterChain chain) {
			super(request, response, chain);
		}

	}

}
