/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.wicket.util.tester.apps_5;

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.Optional;

import org.apache.wicket.Page;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxFallbackLink;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.util.tester.WicketTestCase;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

/**
 * Test that the clickLink method also works with AjaxLinks
 * 
 * @author Frank Bille
 */
class AjaxLinkClickTest extends WicketTestCase
{
	private boolean linkClicked;
	private AjaxRequestTarget ajaxRequestTarget;

	/**
	 * Make sure that our test flags are reset between every test.
	 */
	@BeforeEach
	void before()
	{
		linkClicked = false;
		ajaxRequestTarget = null;
	}

	/**
	 * Test that an AjaxLink's onClick method is actually invoked.
	 */
	@Test
	void testBasicAjaxLinkClick()
	{
		// Create a link, which we test is actually invoked
		final AjaxLink<Void> ajaxLink = new AjaxLink<Void>("ajaxLink")
		{
			private static final long serialVersionUID = 1L;

			@Override
			public void onClick(AjaxRequestTarget target)
			{
				linkClicked = true;
				ajaxRequestTarget = target;
			}
		};

		Page page = new MockPageWithLink();
		page.add(ajaxLink);
		tester.startPage(page);
		tester.clickLink("ajaxLink");

		assertTrue(linkClicked);
		assertNotNull(ajaxRequestTarget);
	}

	/**
	 * Test that clickLink also works with AjaxFallbackLinks
	 * 
	 * AjaxFallbackLinks should be clicked and interpreted as an AjaxLink, which means that
	 * AjaxRequestTarget is not null.
	 */
	@Test
	void testAjaxFallbackLinkClick()
	{
		final Page page = new MockPageWithLink();

		// Create a link, which we test is actually invoked
		page.add(new AjaxFallbackLink<Void>("ajaxLink")
		{
			private static final long serialVersionUID = 1L;

			public void onClick(Optional<AjaxRequestTarget> targetOptional)
			{
				linkClicked = true;
				targetOptional.ifPresent(target -> ajaxRequestTarget = target);
			}
		});

		tester.startPage(page);
		tester.clickLink("ajaxLink");

		assertTrue(linkClicked);
		assertNotNull(ajaxRequestTarget);
	}

	/**
	 * Test that when AJAX is disabled, the AjaxFallbackLink is invoked with null as
	 * AjaxRequestTarget.
	 */
	@Test
	void testFallbackLinkWithAjaxDisabled()
	{
		final Page page = new MockPageWithLink();

		// Create a link, which we test is actually invoked
		page.add(new AjaxFallbackLink<Void>("ajaxLink")
		{
			private static final long serialVersionUID = 1L;

			@Override
			public void onClick(Optional<AjaxRequestTarget> targetOptional)
			{
				linkClicked = true;
				targetOptional.ifPresent(target -> ajaxRequestTarget = target);
			}
		});

		tester.startPage(page);

		// Click the link with ajax disabled
		tester.clickLink("ajaxLink", false);

		assertTrue(linkClicked);
		assertNull(ajaxRequestTarget);
	}
}
