/*
 * Copyright 2013-2014 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.data.hadoop.store.dataset;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.hadoop.test.junit.AbstractHadoopClusterTests;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.List;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public abstract class AbstractDatasetTemplateTests extends AbstractHadoopClusterTests {

	protected DatasetOperations datasetOperations;
	protected List<Object> records = new ArrayList<Object>();
	@Autowired
	protected String path;

	@Autowired
	public void setDatasetOperations(DatasetOperations datasetOperations) {
		this.datasetOperations = datasetOperations;
	}

	@Test
	public void testSavePojo() throws IOException {
		datasetOperations.write(records);
		FileSystem fs = FileSystem.get(getConfiguration());
		assertTrue("Dataset path created", fs.exists(new Path(path)));
		assertTrue("Dataset storage created",
				fs.exists(new Path(path + "/test/" + datasetOperations.getDatasetName(TestPojo.class))));
		assertTrue("Dataset metadata created",
				fs.exists(new Path(path + "/test/" + datasetOperations.getDatasetName(TestPojo.class) + "/.metadata")));
	}

	@Test
	public void testReadSavedPojoWithCallback() {
		datasetOperations.write(records);
		final List<TestPojo> results = new ArrayList<TestPojo>();
		datasetOperations.read(TestPojo.class, new RecordCallback<TestPojo>() {

			@Override
			public void doInRecord(TestPojo record) {
				results.add(record);
			}
		});
		assertEquals(2, results.size());
		if (results.get(0).getId().equals(22L)) {
			assertTrue(results.get(0).getName().equals("Sven"));
			assertTrue(results.get(1).getName().equals("Nisse"));
		}
		else {
			assertTrue(results.get(0).getName().equals("Nisse"));
			assertTrue(results.get(1).getName().equals("Sven"));
		}
	}

	@Test
	public void testReadSavedPojoCollection() {
		datasetOperations.write(records);
		TestPojo pojo3 = new TestPojo();
		pojo3.setId(31L);
		pojo3.setName("Eric");
		pojo3.setBirthDate(new Date());
		datasetOperations.write(Collections.singletonList(pojo3));
		Collection<TestPojo> results = datasetOperations.read(TestPojo.class);
		assertEquals(3, results.size());
		List<TestPojo> sorted = new ArrayList<TestPojo>(results);
		Collections.sort(sorted);
		assertTrue(sorted.get(0).getName().equals("Sven"));
		assertTrue(sorted.get(0).getId().equals(22L));
		assertTrue(sorted.get(1).getName().equals("Eric"));
		assertTrue(sorted.get(1).getId().equals(31L));
		assertTrue(sorted.get(2).getName().equals("Nisse"));
		assertTrue(sorted.get(2).getId().equals(48L));
	}

}