/*
 * Copyright 2002-2017 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.integration.gemfire.outbound;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.apache.geode.cache.Cache;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.Scope;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.data.gemfire.CacheFactoryBean;
import org.springframework.expression.Expression;
import org.springframework.expression.common.LiteralExpression;
import org.springframework.integration.expression.ValueExpression;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.GenericMessage;

/**
 * @author Mark Fisher
 * @author David Turanski
 * @author Gunnar Hillert
 * @author Gary Russell
 * @author Artem Bilan
 * @since 2.1
 */
public class CacheWritingMessageHandlerTests {

	private static CacheFactoryBean cacheFactoryBean;

	private static Region<Object, Object> region;

	@BeforeClass
	public static void startUp() throws Exception {
		cacheFactoryBean = new CacheFactoryBean();
		cacheFactoryBean.afterPropertiesSet();
		Cache cache = cacheFactoryBean.getObject();
		region = cache.createRegionFactory().setScope(Scope.LOCAL).create("sig-tests");
	}

	@AfterClass
	public static void cleanUp() throws Exception {
		if (region != null) {
			region.close();
		}
		if (cacheFactoryBean != null) {
			cacheFactoryBean.destroy();
		}
	}

	@Before
	public void prepare() {
		if (region != null) {
			region.clear();
		}
	}


	@Test
	public void mapPayloadWritesToCache() throws Exception {
		assertEquals(0, region.size());

		CacheWritingMessageHandler handler = new CacheWritingMessageHandler(region);
		handler.setBeanFactory(mock(BeanFactory.class));
		handler.afterPropertiesSet();

		Map<String, String> map = new HashMap<String, String>();
		map.put("foo", "bar");
		Message<?> message = MessageBuilder.withPayload(map).build();
		handler.handleMessage(message);
		assertEquals(1, region.size());
		assertEquals("bar", region.get("foo"));
	}

	@Test
	public void ExpressionsWriteToCache() throws Exception {
		assertEquals(0, region.size());

		CacheWritingMessageHandler handler = new CacheWritingMessageHandler(region);

		Map<String, String> expressions = new HashMap<String, String>();
		expressions.put("'foo'", "'bar'");
		expressions.put("payload.toUpperCase()", "headers['bar'].toUpperCase()");
		handler.setCacheEntries(expressions);
		handler.setBeanFactory(mock(BeanFactory.class));
		handler.afterPropertiesSet();

		Message<?> message = MessageBuilder.withPayload("foo")
				.copyHeaders(Collections.singletonMap("bar", "bar"))
				.build();
		handler.handleMessage(message);
		assertEquals(2, region.size());
		assertEquals("BAR", region.get("FOO"));
		assertEquals("bar", region.get("foo"));

		handler.setCacheEntryExpressions(Collections.<Expression, Expression>singletonMap(new LiteralExpression("baz"),
				new ValueExpression<Long>(10L)));

		handler.handleMessage(new GenericMessage<String>("test"));
		assertEquals(3, region.size());
		assertEquals(10L, region.get("baz"));
	}

}