/*
 * Copyright 2011-2013 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 test;

import java.io.IOException;
import java.util.StringTokenizer;
import java.util.UUID;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.springframework.util.Assert;

import static org.junit.Assert.*;

/**
 * @author Costin Leau
 */
public class SomeToolCopy extends Configured implements Tool {

	static {
		System.setProperty("org.springframework.data.tool.init", UUID.randomUUID().toString());
	}

	public static class CustomMapper extends Mapper<Object, Text, Text, IntWritable> {

		private final static IntWritable one = new IntWritable(1);
		private Text word = new Text();

		public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
			StringTokenizer itr = new StringTokenizer(value.toString());
			while (itr.hasMoreTokens()) {
				word.set(itr.nextToken());
				context.write(word, one);
			}
		}
	}

	public final Job createJob(Configuration conf) throws Exception {
		Assert.notNull(conf);
		@SuppressWarnings("deprecation")
		Job j = new Job(conf, "tool-test");
		j.setMapperClass(CustomMapper.class);
		j.setReducerClass(Reducer.class);

		j.setOutputKeyClass(Text.class);
		j.setOutputValueClass(IntWritable.class);

		j.setInputFormatClass(TextInputFormat.class);
		j.setOutputFormatClass(TextOutputFormat.class);

		FileInputFormat.addInputPath(j, new Path("/ide-test/input/word/"));
		FileOutputFormat.setOutputPath(j, new Path("/ide-test/runner/output/" + UUID.randomUUID().toString()));
		return j;
	}

	@Override
	public int run(String[] args) throws Exception {
		Job j = new SomeToolCopy().createJob(getConf());
		j.waitForCompletion(true);
		assertTrue("Job failed ", j.isSuccessful());
		return Integer.valueOf(args[0]);
	}
}